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1.
Acta Odontol Latinoam ; 32(2): 88-96, 2019 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-31664299

RESUMEN

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.


Asunto(s)
Arco Dental/patología , Maloclusión/etiología , Corona del Diente/patología , Adolescente , Adulto , Cefalometría/estadística & datos numéricos , Niño , Colombia/epidemiología , Estudios Transversales , Coronas , Modelos Dentales , Diastema/etiología , Femenino , Humanos , Masculino , Maloclusión/epidemiología , Maloclusión/patología , Maxilar/patología , Persona de Mediana Edad , Odontometría/estadística & datos numéricos , Tamaño de los Órganos , Adulto Joven
2.
J Appl Oral Sci ; 27: e20180434, 2019 Jun 13.
Artículo en Inglés | MEDLINE | ID: mdl-31215598

RESUMEN

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.


Asunto(s)
Labio Leporino/rehabilitación , Fisura del Paladar/rehabilitación , Arco Dental/patología , Prótesis Dental de Soporte Implantado/métodos , Imagenología Tridimensional/métodos , Ortodoncia Correctiva/métodos , Adolescente , Adulto , Puntos Anatómicos de Referencia , Labio Leporino/patología , Fisura del Paladar/patología , Femenino , Humanos , Masculino , Maxilar/patología , Aparatos Ortodóncicos , Valores de Referencia , Estudios Retrospectivos , Estadísticas no Paramétricas , Resultado del Tratamiento , Adulto Joven
3.
Oral Maxillofac Surg Clin North Am ; 31(2): 339-348, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30871780

RESUMEN

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.


Asunto(s)
Aumento de la Cresta Alveolar/métodos , Trasplante Óseo/métodos , Implantación Dental Endoósea/métodos , Implantes Dentales , Maxilar/cirugía , Osteogénesis por Distracción/métodos , Elevación del Piso del Seno Maxilar/métodos , Arco Dental/patología , Arco Dental/cirugía , Prótesis Dental de Soporte Implantado , Estética Dental , Humanos , Maxilar/patología , Trasplante Autólogo
4.
Pediatr Dent ; 41(1): 9-22, 2019 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-30803471

RESUMEN

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.


Asunto(s)
Arco Dental/patología , Maloclusión/terapia , Ortodoncia Interceptiva/métodos , Niño , Dentición Mixta , Humanos , Incisivo , Maloclusión/patología , Mandíbula , Resultado del Tratamiento
5.
Int J Paleopathol ; 24: 89-93, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30321770

RESUMEN

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.


Asunto(s)
Arco Dental/patología , Mandíbula/patología , Maxilar/patología , Anomalías Dentarias/patología , Diente Impactado/patología , Diente Premolar/patología , Croacia , Historia Antigua , Humanos , Radiografía Panorámica/métodos , Anomalías Dentarias/historia , Erupción Dental , Diente Impactado/historia
6.
Congenit Anom (Kyoto) ; 59(1): 11-17, 2019 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29691907

RESUMEN

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.


Asunto(s)
Arco Dental/patología , Cara/anomalías , Mandíbula/anomalías , Maxilar/anomalías , Síndrome de Turner/patología , Cefalometría , Niño , Arco Dental/diagnóstico por imagen , Dentición Mixta , Cara/diagnóstico por imagen , Femenino , Hormona del Crecimiento/uso terapéutico , Humanos , Incisivo/anomalías , Incisivo/diagnóstico por imagen , Cariotipo , Maloclusión/diagnóstico por imagen , Maloclusión/patología , Mandíbula/diagnóstico por imagen , Maxilar/diagnóstico por imagen , Diente Molar/anomalías , Diente Molar/diagnóstico por imagen , Radiografía Panorámica , Erupción Dental/fisiología , Síndrome de Turner/diagnóstico por imagen , Síndrome de Turner/tratamiento farmacológico , Síndrome de Turner/genética
7.
Eur J Orthod ; 41(2): 188-195, 2019 03 29.
Artículo en Inglés | MEDLINE | ID: mdl-29931294

RESUMEN

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).


Asunto(s)
Maloclusión/terapia , Aparatos Ortodóncicos Fijos , Piezocirugía/métodos , Técnicas de Movimiento Dental/métodos , Adolescente , Adulto , Diente Premolar/cirugía , Arco Dental/patología , Femenino , Humanos , Masculino , Maloclusión/patología , Mandíbula/cirugía , Osteotomía/métodos , Extracción Dental , Técnicas de Movimiento Dental/instrumentación , Adulto Joven
8.
Orthod Fr ; 89(4): 411-420, 2018 12.
Artículo en Francés | MEDLINE | ID: mdl-30565559

RESUMEN

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.


Asunto(s)
Tonsila Faríngea/anatomía & histología , Tonsila Faríngea/patología , Cefalometría , Arco Dental/anatomía & histología , Arco Dental/patología , Tonsila Faríngea/diagnóstico por imagen , Cefalometría/métodos , Niño , Estudios Transversales , Arco Dental/diagnóstico por imagen , Femenino , Humanos , Hipertrofia/patología , Masculino , Nasofaringe/anatomía & histología , Nasofaringe/diagnóstico por imagen , Nasofaringe/patología , Odontometría/métodos , Tamaño de los Órganos , Sobremordida/diagnóstico , Sobremordida/patología
9.
Rom J Morphol Embryol ; 59(3): 729-740, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30534811

RESUMEN

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.


Asunto(s)
Oclusión Dental Traumática/patología , Pulpa Dental/patología , Calcinosis/patología , Arco Dental/patología , Pulpa Dental/irrigación sanguínea , Fibrosis , Humanos , Diente/patología
10.
Rom J Morphol Embryol ; 59(3): 787-802, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30534818

RESUMEN

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.


Asunto(s)
Oclusión Dental Traumática/patología , Encía/patología , Arco Dental/patología , Epitelio/patología , Fibrosis , Humanos , Diente/patología
11.
Am J Orthod Dentofacial Orthop ; 154(4): 477-486, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30268258

RESUMEN

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.


Asunto(s)
Incisivo/anatomía & histología , Maloclusión de Angle Clase II/patología , Tercer Molar/anatomía & histología , Sobremordida , Diente Impactado/complicaciones , Adolescente , Puntos Anatómicos de Referencia , Brasil , Niño , Arco Dental/patología , Femenino , Humanos , Incisivo/patología , Modelos Lineales , Masculino , Mandíbula , Maxilar , Tercer Molar/diagnóstico por imagen , Mordida Abierta , Erupción Dental , Diente Impactado/patología
12.
Artículo en Inglés | MEDLINE | ID: mdl-30249537

RESUMEN

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.


Asunto(s)
Labio Leporino/cirugía , Fisura del Paladar/cirugía , Arco Dental/crecimiento & desarrollo , Imagenología Tridimensional , Maxilar/crecimiento & desarrollo , Fotogrametría , Puntos Anatómicos de Referencia , Arco Dental/diagnóstico por imagen , Arco Dental/patología , Modelos Dentales , Femenino , Humanos , Lactante , Estudios Longitudinales , Masculino , Maxilar/diagnóstico por imagen , Maxilar/patología
13.
J Craniomaxillofac Surg ; 46(10): 1764-1771, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30100383

RESUMEN

OBJECTIVE: To evaluate midfacial growth and dental arch relationships in patients treated for bilateral cleft lip and palate (BCLP). MATERIALS AND METHODS: Data were collected from all patients with BCLP treated at our hospital between 2004 and 2014, with or without premaxillary osteotomy (PO). Dental casts for pre-secondary alveolar bone grafting with PO (SABG + PO) and end-point dental casts were analyzed using the BAURU yardstick scoring system. Pre-SABG + PO, post-SABG + PO, and end-point SABG + PO lateral cephalograms were analyzed. The correlation between both scoring systems was calculated. RESULTS: There were no significant differences between the BAURU scores for centers in a previous study and those collected here. A negative correlation was found between the pre-SABG + PO ANB (Angle between A-point, Nasion and B-point) angle and pre-SABG + PO BAURU scores (R = -0.58; p = 0.000), the long-term post-SABG + PO ANB and mean end-point BAURU (R = -0.50; p = 0.000), and the pre-SABG + PO ANB and mean end-point BAURU (R = -0.51; p = 0.000). CONCLUSION: We found no significant difference between pre-SABG + PO and end-point BAURU scores. There was a decrease in the SNA (Angle between Sella, Nasion and A-point) and ANB angle over time, indicating delayed growth of the maxilla. We found a negative correlation between the pre-SABG ANB and end-point BAURU scores. Pre-SABG ANB can be used to predict the need for Le Fort I osteotomy at age 18.


Asunto(s)
Proceso Alveolar/trasplante , Fisura del Paladar/patología , Arco Dental/patología , Osteotomía Le Fort , Adolescente , Cefalometría , Labio Leporino/patología , Labio Leporino/cirugía , Labio Leporino/terapia , Fisura del Paladar/cirugía , Fisura del Paladar/terapia , Arco Dental/crecimiento & desarrollo , Técnica de Colado Dental , Cara/patología , Femenino , Humanos , Masculino , Desarrollo Maxilofacial , Ortodoncia Correctiva
14.
Prog Orthod ; 19(1): 20, 2018 Jul 16.
Artículo en Inglés | MEDLINE | ID: mdl-30009340

RESUMEN

BACKGROUND: The aetiology of the canine displacement still remains controversial. Some authors implicated a deficiency in maxillary width as a local mechanical cause for impacted canines. The aim of the study was to examine whether there is a relationship between impacted maxillary canines, early diagnosed by using panoramic radiographs, and the morphology of the maxilla on 3D model casts. METHODS: The displaced maxillary canines (DMC) group consisted of 24 patients (mean age, 9.1 ± 1.1 years), while the control group consisted of 25 subjects (mean age, 8.7 ± 0.9 years). Seven measurements were calculated on the digital casts of each subject: intermolar width (IMW), arch length (AL), depth of the palatal vault (PVD), available arch space (AAS), the sum of the anterior segments (SAS), the right/affected (R-Af) and left/unaffected (L-Un) available spaces. RESULTS: Both IMW and AL in the DMC group were significantly decreased relative to the control group (P < 0.01), indicating that patients with displaced canines presented a shorter and narrower palate than subjects without eruption problems. Moreover, the values of the SAS and AAS were significantly decreased (P < 0.01) in the DMC group relative to the controls. CONCLUSIONS: The shape of the maxillary arch was narrower and shorter in the displaced maxillary canines group compared with the control group.


Asunto(s)
Diente Canino/patología , Maxilar/patología , Diente Impactado/diagnóstico , Estudios de Casos y Controles , Niño , Diente Canino/diagnóstico por imagen , Arco Dental/diagnóstico por imagen , Arco Dental/patología , Técnica de Colado Dental , Modelos Dentales , Diagnóstico Precoz , Femenino , Humanos , Masculino , Maxilar/diagnóstico por imagen , Radiografía Panorámica , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología
15.
J Craniofac Surg ; 29(6): 1657-1660, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-30028406

RESUMEN

This study aimed to analyze the dimensional alterations of the dental arches of 5-year-old children with cleft lip and palate and to compare these dimensions with children without oral clefts. One hundred twenty children were divided into the following groups: unilateral cleft lip (UCL), unilateral cleft lip and palate (UCLP), cleft palate (CP), and control (C). A specific software was used to digitize the dental casts and perform the anthropometric analyses through the measurement of transversal linear intercanine and intermolar distances on the maxilla and mandible. The intergroup comparisons of the maxillary dimensions exhibited that the intercanine distances of groups C and UCL were statistically greater than that of groups UCLP and CP. The intermolar distance was significantly smaller in group UCLP than in the other groups. No statistically significant difference occurred in the mandibular intercanine and intermolar distance among groups. The analysis of the superposition of the maxillary over the mandibular transversal distances showed statistically significant differences among groups. This study showed that at 5-year old, the children with cleft involving the palate had more maxillary dimensional alterations than those without cleft palate.


Asunto(s)
Antropometría/métodos , Cefalometría/métodos , Labio Leporino/diagnóstico , Fisura del Paladar/diagnóstico , Arco Dental , Maxilar , Niño , Preescolar , Arco Dental/diagnóstico por imagen , Arco Dental/patología , Diagnóstico por Computador/métodos , Precisión de la Medición Dimensional , Femenino , Humanos , Masculino , Maxilar/diagnóstico por imagen , Maxilar/patología
16.
Dental Press J Orthod ; 23(2): 30-36, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29898155

RESUMEN

The teeth become very close to each other when they are crowded, but their structures remain individualized and, in this situation, the role of the epithelial rests of Malassez is fundamental to release the EGF. The concept of tensegrity is fundamental to understand the responses of tissues submitted to forces in body movements, including teeth and their stability in this process. The factors of tooth position stability in the arch - or dental tensegrity - should be considered when one plans and perform an orthodontic treatment. The direct causes of the mandibular anterior crowding are decisive to decide about the correct retainer indication: Should they be applied and indicated throughout life? Should they really be permanently used for lifetime? These aspects of the mandibular anterior crowding and their implication at the orthodontic practice will be discussed here to induct reflections and insights for new researches, as well as advances in knowledge and technology on this subject.


Asunto(s)
Incisivo/patología , Maloclusión/etiología , Maloclusión/patología , Mandíbula/patología , Pérdida de Hueso Alveolar , Arco Dental/anatomía & histología , Arco Dental/patología , Humanos , Incisivo/anatomía & histología , Mandíbula/anatomía & histología , Retenedores Ortodóncicos , Diente/patología , Erupción Dental , Técnicas de Movimiento Dental
18.
Eur J Orthod ; 40(6): 592-596, 2018 11 30.
Artículo en Inglés | MEDLINE | ID: mdl-29726936

RESUMEN

Objectives: To evaluate the association between maxillary dental arch transverse dimensions, palatal depths, palatal area and volume with buccally displaced canine (BDC) in mixed dentition subjects when compared to non-BDC subjects using laser scanner 3D technology. Materials and methods: Sixty Caucasian subjects, 8-11 years of age (mean, 9.26 ± 1.48 years), were included. In each group (BDC and non-BDC) 30 children were matched. Digital dental casts were obtained using a 3 Shape D700 laser scanner. Intercanine and intermolar widths (cusp and gingival levels), anterior and posterior palatal depth (cusp level), palatal surface area and volume were measured. An independent sample Student's t-test and an ANOVA were undertaken with significance level set as P < 0.05. Results: Intercanine widths at the cusp (1.76 mm; P = 0.020) and the gingival level (1.6 mm; P = 0.006), palatal area (133 mm2; P = 0.021) and volume (790 mm3; P = 0.046) were significantly lower in the BDC compared to the control group. Limitations: A smaller part of the subjects was in late mixed dentition phase. To overcome this limitation a matched control group was used. Some subjects did not have some teeth because of the transition phase which might have had an influence on the dental measurements. However, these subjects were not excluded to avoid introducing a bias. Conclusions: 3D evaluation of the maxillary arch and palate highlighted significant differences between BDC and non-BDC mixed dentition subjects. Maxillary dental arch dimensions and palate morphology may allow early identification and prevention of maxillary canine impaction.


Asunto(s)
Diente Canino/patología , Arco Dental/patología , Paladar (Hueso)/patología , Diente Impactado/patología , Estudios de Casos y Controles , Moldes Quirúrgicos , Niño , Diente Canino/diagnóstico por imagen , Arco Dental/diagnóstico por imagen , Dentición Mixta , Femenino , Humanos , Imagenología Tridimensional , Masculino , Maxilar/diagnóstico por imagen , Maxilar/patología , Odontometría/métodos , Paladar (Hueso)/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen
19.
J Contemp Dent Pract ; 19(5): 515-520, 2018 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-29807960

RESUMEN

AIM: The purpose of this study was to assess the arch width, transverse discrepancy, and transverse interarch ratio for class I malocclusion sample, with and without crossbite, in permanent dentition stage. MATERIALS AND METHODS: Records of class I malocclusion patients with minimal crowding and spacing with and without posterior crossbite were selected. Each group consisted of 40 pairs of dental casts (20 males and 20 females). Arch widths were measured for the canine, first, and second premolars, and first permanent molars using the buccal approach. Means and standard deviations (SDs) of dental arch widths were measured for the maxillary and mandibular arches, and the interarch width ratio was calculated. RESULTS: There was a highly significant difference between the noncrossbite and crossbite groups regarding the maxillary width, p < 0.001. However, no differences were found between groups for the mandibular widths, p > 0.01. There were also significant differences between both groups for the intercanine, first and second premolars, and first molar ratios, p < 0.001. CONCLUSION: This new simple method showed that a transverse maxillary-mandibular ratio of 1:1.1 is ideal. A ratio less than 1:0.9 will indicate the presence of crossbite. CLINICAL SIGNIFICANCE: The interarch ratio significantly aids in orthodontic treatment planning in patients requiring maxillary expansion and/or surgical cases.


Asunto(s)
Cefalometría/métodos , Arco Dental/patología , Maloclusión de Angle Clase I/patología , Diente Premolar , Diente Canino , Dentición Permanente , Femenino , Humanos , Masculino , Mandíbula/patología , Maxilar/patología , Diente Molar
20.
Niger J Clin Pract ; 21(5): 566-572, 2018 May.
Artículo en Inglés | MEDLINE | ID: mdl-29735855

RESUMEN

Objective: The aim was to compare mandibular arch and incisor inclinational changes by comparing active self-ligating brackets used with different forms of archwires with a control group in nonextraction cases. Materials and Methods: The sample of 50 patients with Class I malocclusion was divided into three groups: Group I was treated with active self-ligating brackets (Nexus, Ormco/Orange, CA, USA) used with Damon arch form copper nickel-titanium (Cu-NiTi) and stainless steel (SS) wires; Group II was treated with interactive self-ligating bracket system (Empower, American Orthodontics, Sheboygan, Wis, USA) used with standard Cu-NiTi and SS wires; and Group III was treated with Roth prescribed conventional brackets (Forestadent, Pforzheim, Germany) with standard Cu-NiTi and SS wires which was designed as a control group. Changes in dimension of mandibular arch and inclination of incisors were assessed on dental models and lateral cephalometric radiographs at pretreatment (T1) and posttreatment (T2) periods. Paired-t test and one-way analysis of variance were used to perform intragroup and intergroup comparisons, respectively. Results: In all groups, an average increase of transversal distances occurred from pretreatment to the posttreatment period (P < 0.05). However, mandibular arch length increase was significantly different among the Groups I-III (P = 0.008) and I-II (P = 0.006). No significant intergroup difference was found with regard to incisor inclinational changes. Conclusions: Bracket type had no significant effect on the mandibular dimensional or incisor inclination changes. Besides this, archwire type had only little effect on the treatment results as active self-ligating bracket with Damon archwires increased mandibular arch length greater than other groups.


Asunto(s)
Arco Dental/patología , Mandíbula/patología , Diseño de Aparato Ortodóncico , Soportes Ortodóncicos , Ortodoncia Correctiva/instrumentación , Aleaciones , Cefalometría/métodos , Modelos Dentales , Análisis del Estrés Dental , Femenino , Humanos , Incisivo/patología , Masculino , Níquel/química , Alambres para Ortodoncia , Acero Inoxidable/química , Titanio/química
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