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1.
Braz Oral Res ; 34: e003, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32022222

RESUMO

This retrospective study evaluated facial profile pleasantness determined by two protocols of Class II treatment. The sample comprised facial profile silhouettes obtained retrospectively from the pretreatment (T1) and posttreatment (T2) cephalograms of 60 patients (42 males and 18 females) divided into two groups. One group of 30 patients (mean age of 12.84 years) was treated with the extraction of maxillary first premolars (mean treatment time of 2.7 years), and the other group of 30 patients (mean age of 12.81 years) was treated with a mandibular advancement appliance (Forsus) (mean treatment time of 2.49 years). The facial profile silhouettes (T1 and T2) were randomly distributed in an album containing one patient per sheet. The examiners consisted of 60 orthodontists and 60 lay individuals, who analyzed the profiles in regard to facial pleasantness, using the Likert scale. A comparison between stages T1 and T2 of the two treatment protocols and between the examiners was performed by mixed-design analysis of variance at a significance level of 5%. The results demonstrated a significant difference between T1 and T2 (greater scores for T2 compared to T1), and between lay individuals and orthodontists (orthodontists assigned higher scores), but with no significant difference between the treatment protocols. Both protocols produced positive effects on the facial profile esthetics, from the standpoint of lay individuals and orthodontists.


Assuntos
Estética Dentária , Face/patologia , Má Oclusão de Angle Classe II/patologia , Má Oclusão de Angle Classe II/terapia , Extração Dentária/métodos , Adolescente , Análise de Variância , Dente Pré-Molar/cirurgia , Cefalometria , Criança , Feminino , Humanos , Masculino , Variações Dependentes do Observador , Aparelhos Ortodônticos Fixos , Ortodontia Corretiva/métodos , Ortodontistas , Percepção , Estudos Retrospectivos , Estatísticas não Paramétricas , Resultado do Tratamento
2.
J Endod ; 46(1): 29-33, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31735361

RESUMO

INTRODUCTION: Altered sensation is a rare but disturbing adverse event after mandibular premolar and molar periapical surgery procedures, and its incidence is not known. The aim of this study was to determine the incidence of altered sensation after periapical surgery procedures in mandibular premolars and molars. METHODS: This retrospective study includes patients who received periapical surgery in endodontic clinics of a university hospital in the United States. Data were obtained by review of the records for patients who met the inclusion criteria, and statistical analysis of possible predictive factors was performed using the 2-tailed Fisher exact test (α = 0.05). RESULTS: Sixty-two patients (63 teeth, 13 premolars and 50 molars) met the inclusion and exclusion criteria and were analyzed in the study. The first follow-up visit occurred 3 to 37 days after surgery. Altered sensation was observed in 9 patients. Observation of altered sensation was significantly higher (odds ratio = 7.19) after premolar surgeries (5/13) compared with molar surgeries (4/50). CONCLUSIONS: Despite the limited size and retrospective nature of this study, it was concluded that the incidence of altered sensation after periapical surgery appears to be relatively high (14%), with a higher incidence found in premolars compared with molars.


Assuntos
Dente Pré-Molar , Mandíbula , Dente Molar , Transtornos das Sensações , Dente Pré-Molar/cirurgia , Humanos , Incidência , Mandíbula/cirurgia , Dente Molar/cirurgia , Estudos Retrospectivos , Sensação , Transtornos das Sensações/etiologia
3.
Niger J Clin Pract ; 22(11): 1530-1538, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31719274

RESUMO

Background: Bimaxillary protrusion is a common dentofacial condition associated with proclination of maxillary and mandibular incisors in relation to the dental and cranial bases resulting in soft tissue procumbency. The present retrospective study aimed to investigate dental and soft tissue profile changes using cephalometric analysis to evaluate bimaxillary protrusion patients after extraction of the first four premolars and subsequent retraction of the anterior teeth. Materials and Methods: Pre-treatment and post-treatment cephalometric radiographs of 46 Saudi patients (16 males and 30 females), 18-30 years of age with bimaxillary protrusion, were selected based on inclusion criteria. Dental and soft tissue landmarks were traced using the Dolphin® imaging software and statistically analyzed with SPSS® 21 software. Results: The upper and lower incisors retroclined by a mean value of 9.6° and 9.65°, respectively, and an average distance of 4.1 mm. The level of maxillary incisor exposure was reduced by approximately 1.1 mm after treatment. A mean increase of 6.6° in the nasolabial angle was also observed. Multiple regression analysis showed that retraction of both upper and lower incisors by 1 mm would result in a 0.44 mm retraction of the upper and lower lips. Conclusion: A statistically significant increase in the nasolabial angle and upper lip length was found in relation to upper and lower incisor retraction and retroclination. A significant reduction was also evident in the post treatment upper incisor exposure, facial convexity angle and mentolabial sulcus depth.


Assuntos
Cefalometria/métodos , Face/anatomia & histologia , Incisivo/anormalidades , Má Oclusão/terapia , Extração Dentária , Adolescente , Adulto , Dente Pré-Molar/cirurgia , Feminino , Humanos , Incisivo/diagnóstico por imagem , Lábio/anatomia & histologia , Masculino , Má Oclusão/etnologia , Maxila , Aparelhos Ortodônticos , Radiografia , Estudos Retrospectivos , Adulto Jovem
4.
Am J Orthod Dentofacial Orthop ; 156(1): 137-147, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31256827

RESUMO

A 16-year-old patient sought orthodontic correction for profile improvement and labially inclined maxillary incisors. She had Class II malocclusion, protrusive maxillary and mandibular incisors, and increased overjet and overbite with an American Board of Orthodontics discrepancy index value of 25. She was treated with maxillary premolar extractions and miniscrew-supported en masse retraction assisted with piezoincisions. Extraction spaces (7.5 mm per side) were closed with maximum anchorage in 10 months. Total treatment time was 23 months. Twenty-seven months after debonding, a pink spot was noted at the buccocervial region of the left central incisor. Radiographic evaluation on cone-beam computed tomographic scans revealed a severe case of invasive cervical resorption on both central incisors, around which the piezosurgical cuts had been made. Treatment proceeded with a nonintervention approach and the affected teeth were reinforced with a lingual retainer.


Assuntos
Má Oclusão de Angle Classe II/terapia , Ortodontia Corretiva/métodos , Sobremordida/terapia , Piezocirurgia/efeitos adversos , Adolescente , Dente Pré-Molar/cirurgia , Parafusos Ósseos , Cefalometria , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Incisivo/diagnóstico por imagem , Incisivo/patologia , Incisivo/cirurgia , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/cirurgia , Mandíbula , Maxila/diagnóstico por imagem , Maxila/patologia , Maxila/cirurgia , Procedimentos de Ancoragem Ortodôntica/instrumentação , Procedimentos de Ancoragem Ortodôntica/métodos , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Braquetes Ortodônticos , Fios Ortodônticos , Sobremordida/diagnóstico por imagem , Sobremordida/cirurgia , Radiografia Panorâmica , Reabsorção da Raiz/etiologia , Técnicas de Movimentação Dentária/métodos , Resultado do Tratamento , Dimensão Vertical
5.
Am J Orthod Dentofacial Orthop ; 155(5): 681-692, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31053284

RESUMO

PURPOSE: The purpose of this study was to determine how micro-osteoperforations (MOPs) affect tooth movements, bone turnover, bone density, and bone volume. METHODS: A split-mouth experimental design with 7 beagle dogs was used to evaluate bone surrounding maxillary second premolars that had been retracted for 7 weeks. One month after the maxillary third premolars were extracted, 8 MOPs (1.5 mm wide and 7 mm deep) were created without flaps with the use of the Propel device (6 were placed 3 mm distal to the second premolar and 2 were placed in the premolar furcation) on one randomly chosen side. The maxillary second premolars were retracted bilaterally with the use of 200 g nickel-titanium closed coil springs. Tooth movements were measured intraorally and radiographically. Microscopic computed tomography was used to evaluate the material density and volume fraction of bone distal to the premolars. Hematoxylin and eosin-stained and fluorescent sections were used to examine the bone remodeling. RESULTS: Neither the intraoral (P = 0.866) nor radiographic (P = 0.528) measures showed statistically significant side differences in tooth movements. There also were no statistically significant differences in the density (P = 0.237) or volume fraction (P = 0.398) of bone through which the premolars were being moved. Fluorescent and histologic evaluations showed no apparent differences in osteoblasts, osteoclasts, or mineralization of bone near the teeth being moved. Bone healing was evident in and near the MOP sites, which had nearly but not completely healed after 7 weeks. Regions of acellular bone were evident extending ∼0.8 mm from the MOP sites. CONCLUSIONS: MOPs placed 3 mm away from teeth do not increase tooth movements and have limited and transitory effect on bone.


Assuntos
Prótese Dentária , Técnicas de Movimentação Dentária/instrumentação , Animais , Dente Pré-Molar/cirurgia , Densidade Óssea/fisiologia , Remodelação Óssea/fisiologia , Planejamento de Prótese Dentária , Cães , Maxila/patologia , Microtomografia por Raio-X
7.
Eur J Orthod ; 41(2): 180-187, 2019 03 29.
Artigo em Inglês | MEDLINE | ID: mdl-30668660

RESUMO

OBJECTIVE: To analyse cost-effectiveness of anchorage reinforcement with buccal miniscrews and with molar blocks. We hypothesized that anchorage with miniscrews is more cost-effective than anchorage with molar blocks. TRIAL DESIGN: A single-centre, two-arm parallel-group randomized controlled trial. METHODS: Adolescents (age 11-19 years) in need of treatment with fixed appliance, premolar extractions, and en masse retraction were recruited from one Public Dental Health specialist centre. The intervention arm received anchorage reinforcement with buccal miniscrews during space closure. The active comparator received anchorage reinforcement with molar blocks during levelling/alignment and space closure. The primary outcome measure was societal costs defined as the sum of direct and indirect costs. Randomization was conducted as simple randomization stratified on gender. The patients, caregivers, and outcome assessors were not blinded. RESULTS: Eighty patients were randomized into two groups. The trial is completed. All patients were included in the intention-to-treat analysis. The median societal costs for the miniscrew group were €4681 and for the molar block group were €3609. The median of the difference was €825 (95% confidence interval (CI) 431-1267). This difference was mainly caused by significantly higher direct costs consisting of material and chair time costs. Differences in chair time costs were related to longer treatment duration. No serious harms were detected, one screw fractured during insertion and three screws were lost during treatment. GENERALIZABILITY AND LIMITATIONS: The monetary variables are calculated based on a number of local factors and assumptions and cannot necessarily be transferred to other countries. Variables such as chair time, number of appointments, and treatment duration are generalizable. Owing to the study protocol, the benefit of miniscrews as a stable anchorage has not been fully utilized. CONCLUSIONS: When only moderate anchorage reinforcement is needed, miniscrews are less cost-effective than molar blocks. The initial hypothesis was rejected. Miniscrews provide better anchorage reinforcement at a higher price. They should be used in cases where anchorage loss cannot be accepted. TRIAL REGISTRATION: NCT02644811.


Assuntos
Parafusos Ósseos/economia , Procedimentos de Ancoragem Ortodôntica/economia , Procedimentos de Ancoragem Ortodôntica/instrumentação , Técnicas de Movimentação Dentária/economia , Técnicas de Movimentação Dentária/instrumentação , Adolescente , Agendamento de Consultas , Dente Pré-Molar/cirurgia , Parafusos Ósseos/efeitos adversos , Efeitos Psicossociais da Doença , Análise Custo-Benefício , Feminino , Custos de Cuidados de Saúde/estatística & dados numéricos , Humanos , Masculino , Dente Molar , Suécia , Fatores de Tempo , Extração Dentária , Técnicas de Movimentação Dentária/efeitos adversos , Técnicas de Movimentação Dentária/métodos , Adulto Jovem
8.
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
9.
J Prosthodont ; 28(1): e304-e309, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29323779

RESUMO

PURPOSE: To see whether applying four different liners under short fiber-reinforced composite (SFRC), everX Posterior, compared to conventional composite resin, Z250, affected their strengthening property in premolar MOD cavities. MATERIALS AND METHODS: Mesio-occluso-distal (MOD) cavities were prepared in 120 sound maxillary premolars divided into 10 groups (n = 12) in terms of two composite resin types and 4 liners or no liner. For each composite resin, in 5 groups no liner, resin-modified glass ionomer (RMGI), conventional flowable composite (COFL), self-adhesive flowable composite resin (SAFL), and self-adhesive resin cement (SARC) were applied prior to restoring incrementally. After water storage and thermocycling, static fracture resistance was tested. Data (in Newtons) were analyzed using two-way ANOVA (α = 0.05). RESULTS: Fracture resistance was significantly affected by composite resin type (p = 0.02), but not by the liner (p > 0.05). The interaction of the two factors was not statistically significant (p > 0.05). SFRC exhibited higher fracture strength (1470 ± 200 N) compared to conventional composite resin (1350 ± 290), irrespective of the application of liners. Application of SARC and SAFL liners led to a higher number of restorable fractures for both composite resins. CONCLUSIONS: The four liners can be used without interfering with the higher efficacy of SFRC, compared to conventional composite resins, to improve the fracture strength of premolar MOD cavities.


Assuntos
Dente Pré-Molar/cirurgia , Resinas Compostas/uso terapêutico , Forramento da Cavidade Dentária , Restauração Dentária Permanente , Resinas Compostas/efeitos adversos , Forramento da Cavidade Dentária/efeitos adversos , Falha de Restauração Dentária , Restauração Dentária Permanente/efeitos adversos , Restauração Dentária Permanente/métodos , Análise do Estresse Dentário , Vidro , Humanos , Polímeros/efeitos adversos , Polímeros/uso terapêutico
10.
J Int Med Res ; 47(1): 84-95, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30200801

RESUMO

OBJECTIVES: The goal of this study was to analyze skeletal, dental, and soft tissue changes of patients treated with customized lingual systems and to evaluate the clinical effectiveness of miniscrew anchorage. METHODS: Nine upper first premolar extraction patients who were treated with customized lingual appliances were included in this study. Miniscrews were used for reinforcement of molar anchorage. Cephalometric films and study models were obtained before treatment (T1), after alignment (T2), and after treatment (T3). Treatment effects were analyzed by cephalometric radiographs and study models. RESULTS: The upper anterior teeth were retracted significantly at T2 and T3 (4.41 ± 4.14 mm and 5.51 ± 2.48 mm, respectively). During space closure, the upper first molars showed slight mesial movement (1.50 ± 1.97 mm). The intercanine width of the upper arch increased at T2 (1.59 ± 1.81 mm), but decreased at T3 (0.11 ± 1.00 mm). The sella-nasion-A, A-nasion-B, and mandibular plane angles were not significantly changed at T3. The upper lip showed continuous retraction at both T2 and T3 (1.40 ± 1.46 mm and 2.32 ± 2.48 mm, respectively). CONCLUSIONS: By using miniscrew anchorage for lingual orthodontics, patients' dental and soft tissue changes considerably improved and molar anchorage was reinforced.


Assuntos
Parafusos Ósseos , Má Oclusão/cirurgia , Aparelhos Ortodônticos , Ortodontia/métodos , Terapia de Tecidos Moles/instrumentação , Adolescente , Adulto , Dente Pré-Molar/cirurgia , Cefalometria/métodos , Criança , Modelos Dentários , Feminino , Humanos , Masculino , Má Oclusão/patologia , Mandíbula/anatomia & histologia , Mandíbula/cirurgia , Maxila/anatomia & histologia , Maxila/cirurgia , Ortodontia/instrumentação , Terapia de Tecidos Moles/métodos , Extração Dentária
11.
J Int Med Res ; 47(1): 470-480, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30514145

RESUMO

OBJECTIVE: The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of two root canal obturation techniques by using micro-computed tomography imaging and a push-out test. METHODS: The root canals of 40 human maxillary premolar teeth were instrumented and divided into four groups: (A) single cone (SC) followed by immediate post space preparation, (B) continuous wave of condensation (CWC) followed by immediate post space preparation, (C) SC followed by delayed post space preparation, and (D) CWC followed by delayed post space preparation. Micro-CT scans were performed for volumetric analysis of voids and filling materials in the apical 4-mm portion. A push-out test was performed, and failure modes (adhesive, cohesive, or mixed) were assessed. Data were analyzed using the Kruskal-Wallis test and one-way analysis of variance. RESULTS: No significant differences were observed among the four groups in terms of the percentage volume of voids of the apical 4 mm or the bond strength of apical gutta-percha. CONCLUSIONS: The percentage volume of voids and bond strength of apical gutta-percha were similar and were not significantly influenced by the timing of post space preparation or the obturation technique.


Assuntos
Dente Pré-Molar/cirurgia , Cavidade Pulpar/cirurgia , Guta-Percha/química , Obturação do Canal Radicular/métodos , Análise de Variância , Dente Pré-Molar/patologia , Cavidade Pulpar/diagnóstico por imagem , Cavidade Pulpar/patologia , Análise de Falha de Equipamento/métodos , Humanos , Maxila/diagnóstico por imagem , Maxila/cirurgia , Obturação do Canal Radicular/instrumentação , Fatores de Tempo , Extração Dentária , Microtomografia por Raio-X
12.
Microsc Res Tech ; 82(4): 394-401, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30575196

RESUMO

The aim of this in vitro study was to compare the efficacies of two different fiber post-removal systems. Thirty extracted single-rooted mandibular premolar teeth were used. After RelyX fiber posts were cemented, the teeth were divided into two groups with regard to the post removal techniques: ultrasonic vibration and D.T. Light-Post removal kit. Residual material, tooth volume changes, working time and micro-crack formation were assessed using micro-computed tomography. All data were analyzed using Wilcoxon signed-rank and Mann-Whitney U tests. There was significantly more tooth root volume change in the ultrasonic group than removal kit group (p < .05). Fiber post removal time for the ultrasonic group was significantly longer than the removal kit group (p < .01).


Assuntos
Dente Pré-Molar/cirurgia , Tratamento do Canal Radicular/métodos , Raiz Dentária/cirurgia , Análise do Estresse Dentário , Humanos , Mandíbula , Ultrassom , Microtomografia por Raio-X
13.
Dental Press J Orthod ; 23(5): 82-92, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30427497

RESUMO

The esthetic benefits are among the main goals of orthodontic treatment; therefore, tooth extractions have been avoided as a protocol for orthodontic treatment because they may impair the facial profile. The present article discusses aspects as the magnitude and response of soft tissue profile due to changes in incisor positioning, and the effect of different sequences of premolar extraction. One case report illustrates the subject, with favorable and stable esthetic and occlusal outcomes five years after orthodontic treatment with extraction of second premolars.


Assuntos
Dente Pré-Molar/cirurgia , Face/anatomia & histologia , Extração Dentária/efeitos adversos , Adulto , Dente Pré-Molar/diagnóstico por imagem , Cefalometria , Estética Dentária , Feminino , Humanos , Má Oclusão de Angle Classe I/cirurgia , Fotografia Dentária , Radiografia Panorâmica
14.
Int Orthod ; 16(4): 665-675, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30385293

RESUMO

INTRODUCTION: Different treatment protocols have been implemented for management of Class III malocclusion with aim of achieving ideal occlusal goals. The aim of current study was to compare the efficiency of Class III treatment with mandibular 2-premolar extraction and mandibular molar distalization protocol. METHODS: This retrospective cross sectional study was conducted on pre-treatment and post-treatment dental casts of 60 orthodontic patients who had Class III malocclusion and were treated with a mandibular dentition distalization and mandibular 2-premolars extraction protocol. The study was conducted at orthodontic departments of Dental Section, Faisalabad Medical University/Punjab Medical College and de'Montmorency College of Dentistry, Pakistan. The sample was classified into 2 groups. Group A consisted of 30 patients (20 females, 10 males) (mean age, 18.02years) treated with distalization protocol and Group B consisted of 30 patients (18 females, 12 males) (mean age, 18.97years) treated with mandibular 2-premolars extraction protocol. To compare the efficiency of the treatment protocol in each group, the initial and final occlusal results were assessed on dental models using PAR index while treatment efficiency was assessed using a treatment efficiency index (TX). The groups were compared with t and Mann-Whitney tests. RESULTS: There were no significant differences in the initial age, treatment time, treatment efficiency and any occlusal feature between the groups. CONCLUSION: Treatment efficiency of Class III malocclusions with mandibular 2-premolar extractions or mandibular dentition distalization protocol is similar.


Assuntos
Dente Pré-Molar/cirurgia , Má Oclusão de Angle Classe III/terapia , Extração Dentária , Técnicas de Movimentação Dentária/métodos , Adolescente , Estudos Transversais , Feminino , Humanos , Masculino , Má Oclusão de Angle Classe III/cirurgia , Ortodontia Interceptora/métodos , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
15.
Head Face Med ; 14(1): 17, 2018 Sep 24.
Artigo em Inglês | MEDLINE | ID: mdl-30249268

RESUMO

BACKGROUND: Controlled space closure in cases of isolated lower second premolar aplasia (ILSPA) without maxillary counterbalancing extraction is challenging. Anterior anchorage loss may occur during space closure resulting in compromised occlusal results in terms of an absence of proper canine guidance during laterotrusive mandible movements. In order to evaluate the effectiveness of Herbst telescope anchorage in combination with double-cable, pull mechanics and a completely customized lingual appliance for orthodontic space management in cases of ILSPA, we tested the null hypothesis that there is a significant deterioration in the sagittal canine relationship towards an Angle-Class-II occlusion expressed as a loss of anterior anchorage following space closure with molar mesialization. METHODS: Twenty-five consecutively de-bonded subjects (female / male 17 / 8; aged at T0 (start of MB Tx) 12.3 to 20.6 years; mean age 15.0 / SD 1.7 years) were included in this retrospective analysis using the inclusion criteria of least of one lower second premolar aplasia; completed treatment with a totally customized lingual appliance (CCLA) in combination with Herbst telescopes. Exclusion criteria were the absence of counterbalancing maxillary extractions, as well as additional tooth aplasia other than lower second premolars. A total of 33 single, lower premolar aplasia space closures (right / left sided 17 / 16) were assessed using plaster casts and intra-oral photographs scaled to the plaster casts, at bonding (T0), Herbst insertion (T1), following gap closure (T2) and de-bonding (T3). Parallelism of roots was controlled by panoramic x-rays at T3. RESULTS: The mean aplasia space at T0 was 7.5 mm (SD 2.6). Complete space closure was achieved in all 33 situations. The null hypothesis was rejected. There was a significant improvement in the initial canine relationships (mean 3.5 mm distal occlusion at T0) to a mean 0.1 mm at T3. When evaluated against the individual treatment plan, the following amounts of planned improvements were achieved: space closure 100%, canine relationship 97.5%, overjet 93.9%, overbite 96.4%, parallel roots in space closure site 93.9%. CONCLUSION: Herbst telescope anchorage in combination with double-cable pull mechanics and a CCLA for orthodontic space closure can deliver predictable, high-quality treatment results.


Assuntos
Dente Pré-Molar/anormalidades , Procedimentos de Ancoragem Ortodôntica/métodos , Aparelhos Ortodônticos Funcionais , Fios Ortodônticos , Anormalidades Dentárias/cirurgia , Adolescente , Dente Pré-Molar/cirurgia , Estudos de Coortes , Terapia Combinada , Estética Dentária , Feminino , Humanos , Masculino , Mandíbula/diagnóstico por imagem , Mandíbula/cirurgia , Maxila/anormalidades , Maxila/cirurgia , Procedimentos de Ancoragem Ortodôntica/instrumentação , Fechamento de Espaço Ortodôntico , Radiografia Panorâmica/métodos , Estudos Retrospectivos , Anormalidades Dentárias/diagnóstico por imagem , Extração Dentária/métodos , Resultado do Tratamento , Adulto Jovem
16.
J Clin Pediatr Dent ; 42(5): 401-405, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30222510

RESUMO

An ankylosed primary molar may cause rotation or ectopic impaction of succedaneous premolar. When conventional treatment modalities such as observation, surgical exposure with or without orthodontic traction, and autotransplantation are not possible, the simple surgical relocation method could be an alternative treatment option for a lingually rotated premolar during the tooth germ stage before opting to extraction. In the case reported herein, the lingually rotated permanent mandibular second premolar tooth germ was surgically relocated within its bony crypt. Continued root development and spontaneous eruption were observed without complications during the 3.5-year follow-up period.


Assuntos
Dente Pré-Molar/cirurgia , Anquilose Dental/cirurgia , Germe de Dente/cirurgia , Pré-Escolar , Feminino , Humanos , Dente Decíduo
17.
Am J Orthod Dentofacial Orthop ; 154(2): 175-187, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-30075920

RESUMO

INTRODUCTION: Our aim was to assess the available evidence for the effects of orthodontic treatment with 4 premolar extractions on the skeletal vertical dimension of the face compared with nonextraction treatment. METHODS: Electronic database searches (MEDLINE, EMBASE, Cochrane Oral Health Group's Trials Register, and CENTRAL) of published and unpublished literature and hand searches of eligible studies were performed, with no language or publication date restrictions. Two authors performed data extraction independently and in duplicate. Risk of bias was assessed. RESULTS: After application of the eligibility criteria, 14 studies were included in this systematic review. All were retrospective. Risk of bias ranged from moderate to critical. Ten studies investigated patients with various skeletal vertical patterns and classes of malocclusion and found no difference between extraction (Ex) and nonextraction (Nonex) treatment in regard to the vertical dimension. Only 2 studies found statistically significant increases in the nonextraction groups, one in N-Me (Ex: +1.5 mm; Nonex: +5.5 mm; P <0.05) and one in SN-GoGn (Ex: -0.9°; Nonex: +0.8°; P <0.05), but without a concurrent significant change in other vertical measurements such as FMA. Two other studies showed opposite findings regarding N-Me (Ex: +2.3 mm; Nonex: +0.9 mm; P <0.05) and FMA (Ex: +0.3°; Nonex: -2.0°; P <0.05). CONCLUSIONS: Although the quality of evidence ranged from moderate to low, there was considerable agreement among these studies, suggesting that orthodontic treatment with 4 premolar extractions has no specific effect on the skeletal vertical dimension. Thus, an extraction treatment protocol aiming to reduce or control the vertical dimension does not seem to be an evidence-based clinical approach.


Assuntos
Dente Pré-Molar/cirurgia , Face/anatomia & histologia , Ortodontia Corretiva/métodos , Extração Seriada , Dimensão Vertical , Humanos
18.
Artigo em Inglês | MEDLINE | ID: mdl-30113605

RESUMO

The purpose of this study was to evaluate the survival of 525 composite indirect restorations in premolars and molars after a follow-up of 20 years. For each patient, the following variables were recorded and analyzed: age, sex, smoking status, presence of plaque according to O'Leary index, and presence of bruxism. For each restoration, the following variables were collected: restoration class, tooth type (premolar or molar), and restoration material. Mean 20-year survival rate of composite restorations was 57%, ranging from 44% to 75%. The Kaplan-Meier method demonstrated a probability of survival at 10 years of 80% and 90%. Surviving restorations kept their clinical characteristics extremely well, as assessed on the basis of the United States Public Health Service criteria. The results of this study demonstrate the efficacy of indirect composite restorations, confirming their reliability as a posterior prosthetic clinical option.


Assuntos
Resinas Compostas/uso terapêutico , Restauração Dentária Permanente/métodos , Dente Pré-Molar/cirurgia , Falha de Restauração Dentária , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Dente Molar/cirurgia , Estudos Retrospectivos
19.
Int J Mol Sci ; 19(9)2018 Aug 23.
Artigo em Inglês | MEDLINE | ID: mdl-30142971

RESUMO

Periodontal disease, a chronic disease caused by bacterial infection, eventually progresses to severe inflammation and bone loss. Regulating excessive inflammation of inflamed periodontal tissues is critical in treating periodontal diseases. The periodontal ligament (PDL) is primarily a connective tissue attachment between the root and alveolar bone. PDL fibroblasts (PDLFs) produce pro-inflammatory cytokines in response to bacterial infection, which could further adversely affect the tissue and cause bone loss. In this study, we determined the ability of Litsea japonica leaf extract (LJLE) to inhibit pro-inflammatory cytokine production in PDLFs in response to various stimulants. First, we found that LJLE treatment reduced lipopolysaccharide (LPS)-induced pro-inflammatory cytokine (interleukin-6 and interleukin-8) mRNA and protein expression in PDLFs without cytotoxicity. Next, we observed the anti-inflammatory effect of LJLE in PDLFs after infection with various oral bacteria, including Fusobacterium nucleatum, Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia. These anti-inflammatory effects of LJLE were dose-dependent, and the extract was effective following both pretreatment and posttreatment. Moreover, we found that LJLE suppressed the effect of interleukin-1 beta-induced pro-inflammatory cytokine production in PDLFs. Taken together, these results indicate that LJLE has anti-inflammatory activity that could be exploited to prevent and treat human periodontitis by controlling inflammation.


Assuntos
Anti-Inflamatórios/farmacologia , Fibroblastos/efeitos dos fármacos , Interleucina-1beta/antagonistas & inibidores , Lipopolissacarídeos/antagonistas & inibidores , Litsea/química , Extratos Vegetais/farmacologia , Adulto , Anti-Inflamatórios/química , Dente Pré-Molar/citologia , Dente Pré-Molar/cirurgia , Sobrevivência Celular/efeitos dos fármacos , Técnicas de Cocultura , Fibroblastos/citologia , Fibroblastos/imunologia , Fibroblastos/microbiologia , Fusobacterium nucleatum/química , Fusobacterium nucleatum/crescimento & desenvolvimento , Fusobacterium nucleatum/patogenicidade , Voluntários Saudáveis , Humanos , Interleucina-1beta/farmacologia , Interleucina-6/antagonistas & inibidores , Interleucina-6/biossíntese , Interleucina-6/imunologia , Interleucina-8/antagonistas & inibidores , Interleucina-8/biossíntese , Interleucina-8/imunologia , Lipopolissacarídeos/farmacologia , Dente Molar/citologia , Dente Molar/cirurgia , Ligamento Periodontal/citologia , Ligamento Periodontal/cirurgia , Extratos Vegetais/química , Folhas de Planta/química , Porphyromonas gingivalis/química , Porphyromonas gingivalis/crescimento & desenvolvimento , Porphyromonas gingivalis/patogenicidade , Cultura Primária de Células , Tannerella forsythia/química , Tannerella forsythia/crescimento & desenvolvimento , Tannerella forsythia/patogenicidade , Treponema denticola/química , Treponema denticola/crescimento & desenvolvimento , Treponema denticola/patogenicidade
20.
Int Orthod ; 16(3): 470-485, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30006082

RESUMO

The aim of the present study was to comprehensively assess the posttreatment effect of premolar extraction versus non-extraction on the position and development of the lower third molars. The sample consisted of 227 patient's pre- and posttreatment panoramic radiographs (53 with four premolar extractions, 174 without extractions). The position and developmental stage of the lower third molars were evaluated by using Pell-Gregory's, Winter's, modified Miloro-DaBell's and Demirjian's classifications, respectively. Premolar extraction had a considerably positive influence on the position and development of the lower third molars and therefore could provide better prognosis for their eruption.


Assuntos
Dente Pré-Molar/cirurgia , Dente Serotino , Extração Dentária , Adolescente , Criança , Feminino , Humanos , Masculino , Dente Serotino/crescimento & desenvolvimento , Radiografia Panorâmica
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