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1.
Homo ; 71(4): 273-280, 2020 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-33146661

RESUMO

Objectives: Torus Palatinus (TP) is a bony projection located on the oral surface of the hard palate. The trait is typically benign, has an unknown etiology, and varies widely in phenotypic expression. Prior studies suggest differences in TP prevalence by sex and ancestry, but the reported rates vary, even within a single ancestral group. We assessed the prevalence of TP and its association with palatal shape in a large multi-ethnic cohort of normal individuals. Methodology: 1102 adults were included (625 with European ancestry, 377 with West African anscestry, and 100 with East Asian ancestry). 3D digital dental casts were obtained and rated. TP frequencies were compared between sexes and/or ethnicities using Chi-squared tests. Dental cast models were then landmarked, and canonical variates analysis was performed to test for shape differences between those with and without TP. Results: Females had a significantly higher rate of TP than males across all three ancestral groups (p≤0.004). In males, no significant differences were found among ethnicities. Ancestral differences in TP frequency were driven by females, with East Asians having the highest rate (34.69%), followed by Europeans (24.88%) and West Africans (15.22%). Shape differences were found only in Asians and Africans, indicated a shorter and wider palate in presence of TP. Conclusions: Ethnic differences in TP frequency were present only in females. Further, females have considerably higher rates of TP than males in each population tested. Further studies of TP at earlier time-points and in connection to other aspects of craniofacial growth may shed light on these sex and ethnic differences.


Assuntos
Arco Dental/patologia , Exostose/epidemiologia , Doenças da Boca/epidemiologia , Palato Duro/patologia , Adolescente , Adulto , Antropologia Física , Feminino , Humanos , Masculino , Prevalência , Adulto Jovem
2.
Acta Odontol Latinoam ; 32(2): 88-96, 2019 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-31664299

RESUMO

The aim of this study was to determine the differences in arch length, inter-canine distance, inter-premolar distance, intermolar distance and arch shape between dental discrepancies (crowding and spacing) in a sample of dental casts from the Afro-Colombian population of San Basilio de Palenque. An analytical, cross-sectional study was conducted on a convenience sample of 63 subjects aged 11 to 57years, of Afro-Colombian origin, with full dentition from first molar to first molar, without extensive caries or restorations, and excluding casts with defects due to loss. The differences between arch (upper and lower) variables were analyzed according to dental discrepancies. Plaster models digitalized with a TR1OS3 Mono scanner with exactitude (6.9 ± 0.9 pm) and precision (4.5 ± 0.9 pm) were analyzed with Orthonalyzer software. Statistical analyses were done on SPSS software (Version 20 for Windows) and Real Statistics. Spacing discrepancy of68.25% was found for upper arch and 66.66% for lower arch; crowding discrepancy of 19.04% for upper arch and 20.63% for lower arch, and an adequate ratio of 12.69% for both arches. No statistically significant difference (p>0.05) was found between arch parameters except for inter-premolar distance on the lower arch. The most frequent arch shape in the population was oval for both upper arch, with 76.19%, and lower arch, with 71.42%. Tooth size was larger in males than females but the difference was not statistically significant.


El objetivo de este estudio fue determinar las diferencias en longitud de arco, distancia intercanina, interpremolar, intermolar y la forma de arco entre discrepancias dentales (apiñamiento y espaciamiento), en una muestra de modelos dentales de la población afrocolombiana de San Basilio de Palenque. Se realizó un estudio analítico transversal, en una muestra por conveniencia de 63 sujetos con un rango de edad entre 11 y 57 años, de origen afrocolombiano, quienes tuvieron dentición completa de primer molar a primer molar, sin caries extensas, ni restauraciones; se excluyeron los modelos con defectos por el vaciado. Se analizaron las diferencias entre las variables de los maxilares (superior e inferior) con las discrepancias dentales. Se utilizaron modelos de yeso que fueron digitalizados con el escánerTR1OS3 Mono con una exactitud de (6.9 ± 0.9 pm) y una precisión de (4.5 ± 0.9 pm)y analizados con el software Orthonalyzer. Los análisis estadísticos se llevaron a cabo utilizando el software SPSS (Versión 20 para Windows) y Real Statistics. Se encontró una discrepancia de espaciamiento de un 68,25% para el arco superior y 66,66% en el arco inferior; y una discrepancia de apiñamiento en el arco superior de 19,04% e inferior de 20,63% y una relación adecuada de 12,69% para los dos arcos. No se encontraron diferencias estadísticamente significativas (p>0.05) en los parámetros de arco a excepción de la distancia interpremolar del arco inferior. La forma de arco más frecuente en la población fue ovalada tanto en el arco superior con un 76,19% como en el arco inferior con un 71,42%. En cuanto al tamaño dental, se presentó mayor tamaño en los hombres que en las mujeres, pero este no fue estadísticamente significativo.


Assuntos
Arco Dental/patologia , Má Oclusão/etiologia , Coroa do Dente/patologia , Adolescente , Adulto , Cefalometria/estatística & dados numéricos , Criança , Colômbia/epidemiologia , Estudos Transversais , Coroas , Diastema/etiologia , Feminino , Humanos , Masculino , Má Oclusão/epidemiologia , Má Oclusão/patologia , Maxila/patologia , Pessoa de Meia-Idade , Odontometria/estatística & dados numéricos , Tamanho do Órgão , Adulto Jovem
3.
Homo ; 70(3): 185-192, 2019 Nov 11.
Artigo em Inglês | MEDLINE | ID: mdl-31486821

RESUMO

The aim was to analyze the changes in mandibular dental arch shape during adolescence and assess its relation to late mandibular incisor crowding. Longitudinal study included 68 orthodontically untreated subjects (49% female) and analyzed their data for the ages of 12, 15, 18 and 21 years. Measurements included anterior arch depth, intercanine, interpremolar/anterior and intermolar/posterior width, Little's Irregularity and Bolton's index and the ratio between anterior arch depth and width. Males had significantly greater posterior widths than females at any age (p < 0.05). The anterior arch depth continuously decreased (p < 0.05), while width increased after the age of 18 years. Mandibular incisor crowding increased during all investigated periods (p < 0.05). The increase of intercanine width at 12-21 years of age reduced the risk for mandibular incisor crowding in the same period by 74% (OR: 0.265: 95% CI 0.076-0.931; p = 0.045). The shape of mandibular dental arch continues to change during adolescence becoming more squared while mandibular incisor crowding increases. The increase in mandibular intercanine width reduces the risk of crowding.


Assuntos
Arco Dental , Incisivo , Má Oclusão/patologia , Adolescente , Adulto , Antropologia Física , Criança , Arco Dental/anatomia & histologia , Arco Dental/crescimento & desenvolvimento , Arco Dental/patologia , Feminino , Humanos , Incisivo/anatomia & histologia , Incisivo/patologia , Estudos Longitudinais , Masculino , Odontometria , Adulto Jovem
4.
Int Orthod ; 17(4): 687-692, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31466930

RESUMO

OBJECTIVE: The purpose of this study was to evaluate, the change in the transverse maxillary arch dimensions, in patients requiring all first premolar extractions when using Active and Passive Self-ligating brackets, and comparing them with Conventional brackets. MATERIALS AND METHODS: This study was a non-blinded randomised clinical trial, which consisted of 42 patients (21 males and 21 females) within the age group of 16-25 years, having bimaxillary protrusion. They were divided into three groups with 14 patients each. In Group 1 - Conventional brackets (3M Unitek), in Group 2 - Passive Self-ligation brackets: Smart Clip (3M Unitek), and in Group 3 - Active Self-ligation brackets: Empower AO (American Orthodontics) were bonded. All brackets had MBT prescription and 0.02" slot size. Dental study models were taken before the start of treatment and after six months of retraction. Inter-canine and intermolar widths were measured in all the three groups in the above mentioned stages. RESULTS: As compared to Conventional brackets, Self-ligating brackets (Passive and Active) showed greater increase in the transverse arch widths. Furthermore, between Passive and Active Self-ligating brackets, Passive Self-ligating brackets - Smart Clip (Group 2) showed a greater increment in the transverse arch dimensions, with an increase of 4.89mm in the inter-canine width and 3.4mm in intermolar width. CONCLUSION: Significant difference was found between Self-ligating brackets and the Conventional bracket system regarding maxillary arch width dimensional changes. Passive Self-ligating brackets - Smart Clip (Group 2) showed the highest and inter-molar width increase.


Assuntos
Dente Pré-Molar , Arco Dental/patologia , Má Oclusão/terapia , Maxila/patologia , Braquetes Ortodônticos , Adolescente , Adulto , Feminino , Humanos , Masculino , Má Oclusão/patologia , Desenho de Aparelho Ortodôntico , Fios Ortodônticos , Técnicas de Movimentação Dentária/métodos , Adulto Jovem
5.
Acta odontol. latinoam ; 32(2): 88-96, Aug. 2019. ilus, tab
Artigo em Inglês | LILACS | ID: biblio-1038164

RESUMO

The aim of this study was to determine the differences in arch length, inter-canine distance, inter-premolar distance, intermolar distance and arch shape between dental discrepancies (crowding and spacing) in a sample of dental casts from the Afro-Colombian population of San Basilio de Palenque. An analytical, cross-sectional study was conducted on a convenience sample of 63 subjects aged 11 to 57years, of Afro-Colombian origin, with full dentition from first molar to first molar, without extensive caries or restorations, and excluding casts with defects due to loss. The differences between arch (upper and lower) variables were analyzed according to dental discrepancies. Plaster models digitalized with a TR1OS3 Mono scanner with exactitude (6.9 ± 0.9 pm) and precision (4.5 ± 0.9 pm) were analyzed with Orthonalyzer software. Statistical analyses were done on SPSS software (Version 20 for Windows) and Real Statistics. Spacing discrepancy of68.25% was found for upper arch and 66.66% for lower arch; crowding discrepancy of 19.04% for upper arch and 20.63% for lower arch, and an adequate ratio of 12.69% for both arches. No statistically significant difference (p>0.05) was found between arch parameters except for inter-premolar distance on the lower arch. The most frequent arch shape in the population was oval for both upper arch, with 76.19%, and lower arch, with 71.42%. Tooth size was larger in males than females but the difference was not statistically significant.


El objetivo de este estudio fue determinar las diferencias en longitud de arco, distancia intercanina, interpremolar, intermolar y la forma de arco entre discrepancias dentales (apiñamiento y espaciamiento), en una muestra de modelos dentales de la población afrocolombiana de San Basilio de Palenque. Se realizó un estudio analítico transversal, en una muestra por conveniencia de 63 sujetos con un rango de edad entre 11 y 57 años, de origen afrocolombiano, quienes tuvieron dentición completa de primer molar a primer molar, sin caries extensas, ni restauraciones; se excluyeron los modelos con defectos por el vaciado. Se analizaron las diferencias entre las variables de los maxilares (superior e inferior) con las discrepancias dentales. Se utilizaron modelos de yeso que fueron digitalizados con el escánerTR1OS3 Mono con una exactitud de (6.9 ± 0.9 pm) y una precisión de (4.5 ± 0.9 pm)y analizados con el software Orthonalyzer. Los análisis estadísticos se llevaron a cabo utilizando el software SPSS (Versión 20 para Windows) y Real Statistics. Se encontró una discrepancia de espaciamiento de un 68,25% para el arco superior y 66,66% en el arco inferior; y una discrepancia de apiñamiento en el arco superior de 19,04% e inferior de 20,63% y una relación adecuada de 12,69% para los dos arcos. No se encontraron diferencias estadísticamente significativas (p>0.05) en los parámetros de arco a excepción de la distancia interpremolar del arco inferior. La forma de arco más frecuente en la población fue ovalada tanto en el arco superior con un 76,19% como en el arco inferior con un 71,42%. En cuanto al tamaño dental, se presentó mayor tamaño en los hombres que en las mujeres, pero este no fue estadísticamente significativo.


Assuntos
Adolescente , Adulto , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Coroa do Dente/patologia , Arco Dental/patologia , Má Oclusão/etiologia , Tamanho do Órgão , Cefalometria/estatística & dados numéricos , Estudos Transversais , Colômbia/epidemiologia , Coroas , Modelos Dentários , Diastema/etiologia , Má Oclusão/patologia , Má Oclusão/epidemiologia , Maxila/patologia , Odontometria/estatística & dados numéricos
6.
Int Orthod ; 17(3): 554-561, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31331704

RESUMO

OBJECTIVE: The aim of this study was to determine the association between transverse maxillary discrepancy and occurrence of potentially impacted maxillary canines in mixed dentition patients. MATERIAL AND METHODS: This cross-sectional analytical study was conducted on 85 Pakistani subjects (32 males and 53 females) aged between 8 to 13 years, having good quality orthopantomographs and dental casts. Maxillary transverse discrepancy was assessed by subtracting the mandibular intermolar width from the maxillary intermolar width on dental cast. Maxillary lateral incisors and canines were traced from orthopantomographs, and canines were placed into sector classification. Chi-square test was used to determine the difference in the occurrence of potentially impacted maxillary canines between patients with maxillary transverse discrepancy and patients without maxillary transverse discrepancy. RESULTS: There was no significant difference seen in the occurrence of impacted maxillary canines in patients with and without maxillary transverse discrepancy in mixed dentition patients. CONCLUSION: Patients with maxillary transverse discrepancy may not be at a higher risk of palatal canine impaction. Radiological presence of canine in sector II, III and IV, pose a higher risk of canine impaction.


Assuntos
Dente Canino/patologia , Dentição Mista , Maxila/anormalidades , Dente Impactado , Adolescente , Criança , Estudos Transversais , Dente Canino/diagnóstico por imagem , Arco Dental/anormalidades , Arco Dental/patologia , Feminino , Humanos , Incisivo , Masculino , Mandíbula , Maxila/patologia , Paquistão , Radiografia Panorâmica , Dente Impactado/diagnóstico por imagem
7.
J Appl Oral Sci ; 27: e20180434, 2019 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-31215598

RESUMO

This study aimed to compare the linear dimensions of the dental arches of adult patients with complete unilateral cleft lip and palate (UCLP) after orthodontic and prosthetic treatment with fixed partial dentures (FPD) to patients without clefts, using 3D technology. This retrospective longitudinal study sample consisted of 35 subjects divided into two groups. Included in this sample were 15 complete UCLP individuals who had received orthodontic treatment before rehabilitation with a fixed partial denture (FG), as well as 20 patients without cleft as control group (CG). All patients were aged between 18 and 30 years. Digital dental casts were obtained in two stages: (T1) end of orthodontic treatment and (T2) one year after prosthetic rehabilitation (FG); and (T1) end of orthodontic treatment and (T2) one year after removal of the orthodontic appliance (CG). Intercanine, interfirst premolar and intermolar distances, and incisor-molar length were obtained. A precalibrated and trained examiner performed the assessments. Intergroup differences between T2 and T1 were compared between the groups using the t test or Mann-Whitney test with a significance level of 5% (p<0.05). The intercanine distance variation (T2-T1) showed statistical difference (p=0.005) increasing in the FG group and decreasing in the CG group. In the interfirst premolar distance variation, FG decreased, while CG increased with statistically significant difference (p=0.008). The intercanine distance of individuals with cleft showed stability, while that of the CG had no stability. The CG showed stability in the interfirst premolar distance, while FG had no stability. These findings showed that the FPD is capable of restricting orthodontic results, leading to a stabilization of the dental arches.


Assuntos
Fenda Labial/reabilitação , Fissura Palatina/reabilitação , Arco Dental/patologia , Prótese Dentária Fixada por Implante/métodos , Imageamento Tridimensional/métodos , Ortodontia Corretiva/métodos , Adolescente , Adulto , Pontos de Referência Anatômicos , Fenda Labial/patologia , Fissura Palatina/patologia , Feminino , Humanos , Masculino , Maxila/patologia , Aparelhos Ortodônticos , Valores de Referência , Estudos Retrospectivos , Estatísticas não Paramétricas , Resultado do Tratamento , Adulto Jovem
8.
Int Orthod ; 17(2): 333-341, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30987957

RESUMO

INTRODUCTION: Obstructive adenoid hypertrophy is cited as one of the causes of mouth breathing and leads to disharmony in the development of orofacial structures. The objective of this study was to compare the measurements of dental arches according to the grade and the obstructive character of adenoids. MATERIALS AND METHODS: A cross-sectional study was carried out with 86 children. The grade and the obstructive character of adenoids were determined from Holmberg and Cohen's radiographic methods respectively. Dental arch measurements were taken on dental casts. A t-test and a Chi2 test were performed respectively to compare the quantitative and qualitative variables of dental arches according to the obstructive character. An Anova test made it possible to compare the quantitative variables according to the grade as Holmberg defined it. For variables that showed significant differences, a Post Hoc test was used. The significance level was set at P=0.05. RESULTS: Subjects with obstructive adenoids had a shorter posterior mandibular length (P=0.04) and a greater overbite (P=0.04) than those with non-obstructive adenoids. Those with grade 4 had a greater arch depth (P=0.02) and were more prone to open bite(P=0.03). CONCLUSION: A prevention program involving the otorhinolaryngologist and the orthodontist for subjects with obstructive adenoids or grade 4 is necessary to minimize their influence on dental arch relationships.


Assuntos
Tonsila Faríngea/patologia , Arco Dental/patologia , Nasofaringe/patologia , Apneia Obstrutiva do Sono/patologia , Criança , Estudos Transversais , Feminino , Humanos , Hipertrofia/complicações , Masculino , Má Oclusão/diagnóstico , Má Oclusão Classe II de Angle/diagnóstico , Má Oclusão Classe II de Angle/etiologia , Mandíbula/patologia , Respiração Bucal , Mordida Aberta , Sobremordida/etiologia
9.
Oral Maxillofac Surg Clin North Am ; 31(2): 339-348, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30871780

RESUMO

Three edentulous maxillary patients were treated with 9- to 15-mm advances of the maxilla by Le Fort I distraction osteogenesis combined with simultaneous sinus floor autograft placement. The patients were subsequently treated with 8 implants placed in the molar, bicuspid, and canine regions for complete arch ceramo-metal fixed restorations. Anterior emergence profile esthetics was obtained in 2 patients who had high smile lines. Following final restoration, no maxillary relapse was evident, and no implants were lost. Implant bone levels were stable, although 2 implants had 3 mm of bone loss over the 12-year follow-up period.


Assuntos
Aumento do Rebordo Alveolar/métodos , Transplante Ósseo/métodos , Implantação Dentária Endóssea/métodos , Implantes Dentários , Maxila/cirurgia , Osteogênese por Distração/métodos , Levantamento do Assoalho do Seio Maxilar/métodos , Arco Dental/patologia , Arco Dental/cirurgia , Prótese Dentária Fixada por Implante , Estética Dentária , Humanos , Maxila/patologia , Transplante Autólogo
10.
Pediatr Dent ; 41(1): 9-22, 2019 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-30803471

RESUMO

Purpose: This systematic review and meta-analysis assessed whether passive lower lingual arch (LLA) resolves mandibular incisor crowding and affects mandibular arch dimension. Methods: We searched PubMed, Web of Science, and Cochrane Database of Systemic Reviews for both randomized controlled trials and nonrandomized studies from 1940 to March 2018. Inclusion criteria were healthy children in mixed dentition with mandibular incisor crowding treated with LLA. Our primary outcome was the amount of mandibular incisor crowding resolved after LLA, and secondary outcomes were effects of LLA mandibular arch dimension changes versus untreated controls (UTCs). Results: From 559 screened articles, seven qualified for systematic review and meta-analyses. The average resolution of mandibular incisor crowding after LLA was 5.10 mm (P=.001) with the evidence assessed as very low quality. Arch perimeter and arch length changes were not significantly different between LLA and UTCs (P=0.20 and P=0.87, respectively). There were significant small increases of 0.79 mm in intercanine width (P<.001) and 0.69 mm in intermolar width (P=.003) with a low and a very low quality of evidence, respectively. Conclusions: Lower lingual arch was effective in resolving mandibular incisor crowding without any significant arch perimeter or arch length changes of greater than one mm.


Assuntos
Arco Dental/patologia , Má Oclusão/terapia , Ortodontia Interceptora/métodos , Criança , Dentição Mista , Humanos , Incisivo , Má Oclusão/patologia , Mandíbula , Resultado do Tratamento
11.
Eur J Orthod ; 41(3): 286-293, 2019 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-30289476

RESUMO

OBJECTIVES: The aim of the study was to evaluate the curve of Spee (COS) stability in patients treated with continuous archwires with different vertical patterns. METHODS: The study sample consisted of 60 patients (28 males, 32 females; mean age 19.8 ± 1.4 years) presenting with COS depth of at least2 mm at baseline. For each subject, lateral cephalograms and dental casts were available before treatment (T1), at the end of orthodontic therapy (T2), and 2 years after the end of treatment (T3). All subjects were divided into three groups according to vertical facial patterns. Cephalometric parameters were used to evaluate the dental movements after treatment. COS depth was measured on digital casts. Mean differences between vertical facial subgroups were contrasted by means of analysis of variance test (P < 0.01). RESULTS: In low-angle subjects, COS levelling occurred through advancement and intrusion of lower incisors, whereas in high-angle patients, the COS was flattened through extrusion and uprighting of lower posterior teeth. In the low-angle group, a significant relapse of lower incisors inclination was observed. Differently, the high-angle group exhibited a greater stability of COS obtained by stable extrusion of posterior teeth. CONCLUSIONS: The long-term instability of flared incisors determined the relapse of overbite and COS depth in the low-angle group.


Assuntos
Arco Dental/anatomia & histologia , Má Oclusão Classe II de Angle , Má Oclusão , Fios Ortodônticos , Ortodontia Corretiva/métodos , Adolescente , Cefalometria , Arco Dental/patologia , Feminino , Humanos , Masculino , Mandíbula , Recidiva , Estudos Retrospectivos , Adulto Jovem
12.
Int J Paleopathol ; 24: 89-93, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30321770

RESUMO

OBJECTIVE: The aim of this paper was to analyse the dental remains of an adult male with three impacted canines from the Roman period cemetery in Osijek, Croatia. MATERIALS: The dental remains of an adult male aged 35-45 years at the time of death were analysed. METHODS: Macroscopic analysis of dental remains was accompanied by radiographic examination. RESULTS: The individual also had additional dental pathologies (carious lesion, antemortem tooth loss). A total of 21 permanent teeth were present in maxillae and mandible. Eighteen of them were normal fully erupted dentition, while three were impacted: left maxillary canine and both mandibular canines. The left maxillary and mandibular canines were mesially inclined, and the right mandibular canine was relatively horizontally positioned. CONCLUSION: A case of non-syndrome impaction in which the lack of eruptive force in combination with the unfavorable position of the tooth bud might have resulted in multiple impacted teeth is presented. SIGNIFICANCE: Current clinical knowledge reports low frequency of this anomaly, with maxillary impaction occurring more often than mandibular. Furthermore, canine impaction is even more rarely reported in the archaeological material. The presented case is the only one from the archaeological setting with impaction present both in maxillae and mandible. LIMITATIONS: In modern populations multiple impactions are often associated with various syndromes. Since the majority of syndromes affect soft tissue, their association with impaction cannot be confirmed in archaeological populations.


Assuntos
Arco Dental/patologia , Mandíbula/patologia , Maxila/patologia , Anormalidades Dentárias/patologia , Dente Impactado/patologia , Dente Pré-Molar/patologia , Croácia , História Antiga , Humanos , Radiografia Panorâmica/métodos , Anormalidades Dentárias/história , Erupção Dentária , Dente Impactado/história
13.
Eur J Orthod ; 41(2): 188-195, 2019 03 29.
Artigo em Inglês | MEDLINE | ID: mdl-29931294

RESUMO

BACKGROUND: No randomized controlled trial (RCT) has compared flapless piezocision-assisted corticotomy in the extraction-based orthodontic decrowding of lower anterior teeth with the conventional treatment. OBJECTIVE: To evaluate the effectiveness of flapless piezocision-assisted corticotomies in accelerating lower anterior teeth alignment. TRIAL DESIGN: A parallel-group RCT was conducted. MATERIALS AND METHODS: Thirty-six patients (mean age 20.32 ± 1.96 years) in need of orthodontic treatment with a fixed orthodontic appliance were enrolled and randomly allocated to either the experimental or the control group. Following first premolar extraction, five radiographic-guided micro incisions and localized piezoelectric corticotomies were performed on the labial surfaces of the alveolar bone between the six anterior teeth in order to accelerate alignment for patients in the experimental group, whereas those in the control group received traditional orthodontic treatment. The overall alignment time (OAT) required to complete anterior alignment of the mandibular dental arch (OAT) was measured. Little's Irregularity Index (LII) was also calculated at monthly intervals. Randomization was performed using a software-generated list of random numbers; the recruited patients were divided into two parallel groups with a 1:1 allocation ratio. Assessor blinding was employed. RESULTS: One hundred and eight severe dental crowding patients were evaluated for eligibility, 40 of them fulfilled the inclusion criteria. Thirty-six participants were allocated to the treatment groups randomly. One female patient was lost to follow-up from the control group, and another female patient was excluded from analysis for the experimental group. Accordingly, the results of 34 patients were statistically analyzed. OAT was reduced by 59% in the experimental group compared to the control group, with a statistically significant difference between the two groups (P < 0.001). No harms were encountered. CONCLUSION: Flapless piezocision technique was very effective in accelerating orthodontic tooth movement. TRIAL REGISTRATION: This trial was registered at Clinical Trials.gov (Identifier: NCT02977221).


Assuntos
Má Oclusão/terapia , Aparelhos Ortodônticos Fixos , Piezocirurgia/métodos , Técnicas de Movimentação Dentária/métodos , Adolescente , Adulto , Dente Pré-Molar/cirurgia , Arco Dental/patologia , Feminino , Humanos , Masculino , Má Oclusão/patologia , Mandíbula/cirurgia , Osteotomia/métodos , Extração Dentária , Técnicas de Movimentação Dentária/instrumentação , Adulto Jovem
14.
Congenit Anom (Kyoto) ; 59(1): 11-17, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29691907

RESUMO

Turner syndrome is associated with an X chromosome abnormality in women and is characterized by infantilism, congenital webbed neck, and cubitus valgus. The aim of this study was to determine the maxillofacial morphology and oral characteristics of Japanese girls (mean age, 8.5 years) with Turner syndrome and early mixed dentition. Lateral cephalograms obtained at the first visit were used to analyze maxillofacial morphology. Oral characteristics were identified using orthopantomograms, intraoral photographs, and study casts. All patients received growth hormone. Lateral cephalograms showed a retrognathic maxilla and mandible and a small gonial angle. Nine patients had a high-arched palate. Nine patients had class II first molar relationship occlusion and one had mesial step-type occlusion. Three patients showed ectopic eruption of the maxillary first permanent molar accompanied by resorption of the maxillary second primary molar. Eruption of the permanent teeth tended to occur early. The median mesiodistal diameter of the maxillary central incisor was smaller than the Japanese norm. Ectopic eruption of the maxillary first permanent molar may be caused by lack of eruption space and a discrepancy between bone growth and timing of tooth maturation.


Assuntos
Arco Dental/patologia , Face/anormalidades , Mandíbula/anormalidades , Maxila/anormalidades , Síndrome de Turner/patologia , Cefalometria , Criança , Arco Dental/diagnóstico por imagem , Dentição Mista , Face/diagnóstico por imagem , Feminino , Hormônio do Crescimento/uso terapêutico , Humanos , Incisivo/anormalidades , Incisivo/diagnóstico por imagem , Cariótipo , Má Oclusão/diagnóstico por imagem , Má Oclusão/patologia , Mandíbula/diagnóstico por imagem , Maxila/diagnóstico por imagem , Dente Molar/anormalidades , Dente Molar/diagnóstico por imagem , Radiografia Panorâmica , Erupção Dentária/fisiologia , Síndrome de Turner/diagnóstico por imagem , Síndrome de Turner/tratamento farmacológico , Síndrome de Turner/genética
15.
J. appl. oral sci ; 27: e20180434, 2019. tab, graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1012505

RESUMO

Abstract This study aimed to compare the linear dimensions of the dental arches of adult patients with complete unilateral cleft lip and palate (UCLP) after orthodontic and prosthetic treatment with fixed partial dentures (FPD) to patients without clefts, using 3D technology. This retrospective longitudinal study sample consisted of 35 subjects divided into two groups. Included in this sample were 15 complete UCLP individuals who had received orthodontic treatment before rehabilitation with a fixed partial denture (FG), as well as 20 patients without cleft as control group (CG). All patients were aged between 18 and 30 years. Digital dental casts were obtained in two stages: (T1) end of orthodontic treatment and (T2) one year after prosthetic rehabilitation (FG); and (T1) end of orthodontic treatment and (T2) one year after removal of the orthodontic appliance (CG). Intercanine, interfirst premolar and intermolar distances, and incisor-molar length were obtained. A precalibrated and trained examiner performed the assessments. Intergroup differences between T2 and T1 were compared between the groups using the t test or Mann-Whitney test with a significance level of 5% (p<0.05). The intercanine distance variation (T2-T1) showed statistical difference (p=0.005) increasing in the FG group and decreasing in the CG group. In the interfirst premolar distance variation, FG decreased, while CG increased with statistically significant difference (p=0.008). The intercanine distance of individuals with cleft showed stability, while that of the CG had no stability. The CG showed stability in the interfirst premolar distance, while FG had no stability. These findings showed that the FPD is capable of restricting orthodontic results, leading to a stabilization of the dental arches.


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Adulto Jovem , Ortodontia Corretiva/métodos , Fenda Labial/reabilitação , Fissura Palatina/reabilitação , Prótese Dentária Fixada por Implante/métodos , Imageamento Tridimensional/métodos , Arco Dental/patologia , Aparelhos Ortodônticos , Valores de Referência , Estudos Retrospectivos , Fenda Labial/patologia , Fissura Palatina/patologia , Resultado do Tratamento , Estatísticas não Paramétricas , Pontos de Referência Anatômicos , Maxila/patologia
16.
Rom J Morphol Embryol ; 59(3): 729-740, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30534811

RESUMO

AIM: In the general economy of the stomatognathic system functionality, the occlusal function has an important role, meaning both the dental-dental reports and the dynamic reports interarch-interarch. Because of the interrelationships and inter-dependency that govern the functioning of the biological systems, a pathological change affecting a component of the stomatognathic system produces impaired functioning of the others. The aim of the present study is to assess the morphological changes occurred in the dental pulp components of teeth affected by occlusal trauma. MATERIALS AND METHODS: Fragments of dental pulp coming from 45 patients with occlusal trauma were processed using classical histological techniques (formalin fixation and paraffin embedment) and stained with Hematoxylin-Eosin (HE), Masson's trichrome and anti-CD34 antibody immunostaining, in order to highlight the peripheral zone and central connective tissue of dental pulp morphological changes. A set of parameters namely thickness of peripheral zone components, calcifications, fibrosis and vascular density in the dental pulp were assessed individually and based on three topographical criteria namely the affected tooth, the position on the dental arches and the position according to sagittal plane. RESULTS: There was no correlation between morphological changes of dental pulp and the topography of teeth with occlusal trauma. The size of the peripheral area of the dental pulp and that of its components evolved in the same sense, whether it was growth or decrease. Decrease of the peripheral area was associated with the increase of collagen fibers density, calcium deposits and density of the capillary network. The direct correlation between the amount of collagen fibers and vascular density seems somewhat paradoxical but it can be explained by the reemergence of chronic inflammatory events located in the dental pulp. CONCLUSIONS: It seems that dental pulp morphological changes are not influenced by the teeth with occlusal trauma topography. With one exception (the components of peripheral zone), most of the correlations between the dental pulp morphological changes were only suggested but not validated statistically, which requires further studies on larger groups together with the introduction of inflammatory cell population studies.


Assuntos
Oclusão Dentária Traumática/patologia , Polpa Dentária/patologia , Calcinose/patologia , Arco Dental/patologia , Polpa Dentária/irrigação sanguínea , Fibrose , Humanos , Dente/patologia
17.
Rom J Morphol Embryol ; 59(3): 787-802, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30534818

RESUMO

AIM: Occlusal trauma causes major modifications of the coverage periodontium, which in turn reflect on the dental unit. The aim of the present study is to evaluate some of the morphological modifications occurred in the marginal periodontium surrounding teeth affected by occlusal trauma. MATERIALS AND METHODS: Fragments of marginal periodontium coming from 51 patients with occlusal trauma were processed using classical histological techniques (formalin fixation and paraffin embedment) and stained with Hematoxylin-Eosin (HE), Masson's trichrome and anti-CD34 antibody immunostaining, in order to highlight the epithelial and connective tissue changes of gingival mucosa. A set of epithelial and connective tissue morphological parameters were assessed individually and based on three topographical criteria concerning the affected tooth. RESULTS: The epithelium and especially its superficial compartment presented changes depending on the tooth type and the dental arch. Epithelial thickness had the tendency to decrease as the fibrosis in both corium compartments and vascular density in the deep corium compartment were increasing. Leukoplakia present around the affected teeth but not always was related with the tooth type and was more obvious as the superficial compartment of the epithelium was thicker and as fibrosis was more reduced in the papillary compartment of the corium. Vascular density reduced when fibrosis process increased in the corium. CONCLUSIONS: Lesions determined by occlusal trauma and their topography can and are influencing locally the different structures of the surrounding periodontium.


Assuntos
Oclusão Dentária Traumática/patologia , Gengiva/patologia , Arco Dental/patologia , Epitélio/patologia , Fibrose , Humanos , Dente/patologia
18.
Orthod Fr ; 89(4): 411-420, 2018 12.
Artigo em Francês | MEDLINE | ID: mdl-30565559

RESUMO

INTRODUCTION: Enlarged adenoids are often associated with oral breathing. The latter can impact the dental arches. The purpose of this study was to determine the relationships between dental arch measurements and the size of adenoids. MATERIALS AND METHODS: A cross-sectional study was carried out on 86 children. The dimensions of the adenoids were determined from nine radiographic evaluation methods and the dental arch measurements made on the casts. The association between the grade of adenoids and the dental arch measurements was sought by Spearman correlation. That between the quantitative variables assessing adenoids and dental arch measurements was sought by Pearson correlation. The strength of these associations was analyzed using Cohen's values in 1988. The significance was set at p = 0.05. RESULTS: Palatal depth was significantly and positively correlated with adenoid grade according to the method of Holmberg and Linder-Aronson (rho = 0.55, p = 0.005) and with the adenoid measurements according to the methods of Kemaloglu, Fujioka, Johannesson, De Menezes and Maran with r respectively equal to 0.65, 0.59, 0.63, 0.47, 0.74; and p respectively equal to 0.001, 0.002, 0.001, 0.019, and < 0.001. It was also significantly but negatively correlated with the adenoids measurements according to Hibbert's method (r = -0.52, p = 0.008). Overbite was significantly and negatively correlated with adenoid dimension using the De Menezes method (r = -0.541, p = 0.006). DISCUSSION: The strength of the associations shows that using respectively Maran and De Menezes methods can allow to better highlight the association between the dimensions of the adenoids and the palatal depth and the overbite.


Assuntos
Tonsila Faríngea/anatomia & histologia , Tonsila Faríngea/patologia , Cefalometria , Arco Dental/anatomia & histologia , Arco Dental/patologia , Tonsila Faríngea/diagnóstico por imagem , Cefalometria/métodos , Criança , Estudos Transversais , Arco Dental/diagnóstico por imagem , Feminino , Humanos , Hipertrofia/patologia , Masculino , Nasofaringe/anatomia & histologia , Nasofaringe/diagnóstico por imagem , Nasofaringe/patologia , Odontometria/métodos , Tamanho do Órgão , Sobremordida/diagnóstico , Sobremordida/patologia
19.
Am J Orthod Dentofacial Orthop ; 154(4): 477-486, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-30268258

RESUMO

INTRODUCTION: In this study, we aimed to determine the effect of maxillary and mandibular posterior space discrepancies and third molar angulations on the overbite. METHODS: Pretreatment lateral cephalograms of 131 subjects were analyzed. The sample included 83 open-bite and 48 deepbite subjects. A multiple regression analysis was used to evaluate the influence of maxillary and mandibular posterior space discrepancies and third molar angulations (predictor variables) on overbite. Correlations between posterior space discrepancy and third molar angulation, and correlations between predictor variables and dental angulation and height of posterior teeth and incisors were evaluated with the Pearson correlation coefficient. Subgroups with accentuated negative overbite and deepbite (27 open-bite, 37 deepbite) were compared with t tests. RESULTS: The multiple linear regression analysis showed a positive association of the mesial angulation of the mandibular third molar with overbite. Posterior space discrepancy was negatively associated with posterior teeth mesial angulation and dentoalveolar height. However, these associations were weak, with no clinically significant implications. The deepbite subgroup showed significantly greater mesial angulation of the mandibular third molars than did the open-bite subgroup. CONCLUSIONS: There was no clinically significant effect of posterior space discrepancies and third molar angulations on overbite and dental angulation and height of posterior teeth and incisors.


Assuntos
Incisivo/anatomia & histologia , Má Oclusão Classe II de Angle/patologia , Dente Serotino/anatomia & histologia , Sobremordida , Dente Impactado/complicações , Adolescente , Pontos de Referência Anatômicos , Brasil , Criança , Arco Dental/patologia , Feminino , Humanos , Incisivo/patologia , Modelos Lineares , Masculino , Mandíbula , Maxila , Dente Serotino/diagnóstico por imagem , Mordida Aberta , Erupção Dentária , Dente Impactado/patologia
20.
Artigo em Inglês | MEDLINE | ID: mdl-30249537

RESUMO

OBJECTIVE: This study aimed to perform a longitudinal morphometric analysis of the alterations of the maxillary dental arches in children with cleft lip and palate before and after primary lip and/or palate surgeries using a 3-dimensional stereophotogrammetry system. STUDY DESIGN: The sample consisted of dental casts of 60 children with complete unilateral cleft lip (UCL) and complete unilateral cleft lip and palate (UCLP). Dental arches were evaluated before cheiloplasty (T1), after cheiloplasty (T2), and 1 year after palatoplasty (T3). Independent t test and Mann-Whitney U test were used for intergroup comparisons, and paired t test, Wilcoxon's test, and repeated-measures analysis of variance (ANOVA), followed by Tukey's test, were used for intragroup comparisons. RESULTS: At T1, the intercanine and intertuberosity distances in the UCLP group were statistically greater than those in the UCL group. At T2, the maxillary dimensions significantly increased, except for the intertuberosity distance in UCL. Between T1 and T3, the intercanine distance and the anterior length decreased significantly, whereas the intertuberosity distance and the total length of the palate increased significantly. CONCLUSIONS: Our results indicated that the primary lip surgery altered the development of dental arches, evidently in children with UCLP. The primary palate surgery interfered in the growth of the anterior palatal region in the UCLP group. Children with UCLP had more restricted development of the maxillary dental arch compared with children with UCL.


Assuntos
Fenda Labial/cirurgia , Fissura Palatina/cirurgia , Arco Dental/crescimento & desenvolvimento , Imageamento Tridimensional , Maxila/crescimento & desenvolvimento , Fotogrametria , Pontos de Referência Anatômicos , Arco Dental/diagnóstico por imagem , Arco Dental/patologia , Feminino , Humanos , Lactente , Estudos Longitudinais , Masculino , Maxila/diagnóstico por imagem , Maxila/patologia
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