AVALIA����O DO ESPA��O DISPON��VEL PARA ERUP����O DOS SEGUNDOS E TERCEIROS MOLARES SUPERIORES PERMANENTES AP��S A DISTALIZA����O DOS PRIMEIROS MOLARES SUPERIORES PERMANENTES

A presente pesquisa tem como objetivo avaliar cefalometricamente, o espa��o e po-sicionamento das coroas dos segundos e terceiros molares superiores permanentes n��o erupcionados na regi��o da tuberosidade maxilar durante a distaliza����o dos pri-meiros molares superiores, al��m de verificar a correla����o entre estas duas vari��veis. A amostra foi constitu��da de 38 telerradiografias em norma lateral direita, obtidas de 19 pacientes, jovens brasileiros, leucodermas e melanodermas, sendo 6 do sexo masculino e 13 do sexo feminino, com idade m��dia de 9 anos 5 meses 13 dias. A metodologia constou inicialmente da divis��o dos tempos (T1) inicial, e ap��s a distali-za����o do primeiro molar superior permanente em (T2) por um per��odo m��dio de 10 meses e 23 dias. Para avalia����o do espa��o e angula����o das coroas existente utili-zou-se uma Linha referencial intracraniana (Linha M) sendo esta demarcada, a partir de dois pontos, o ponto SE localizado na sutura esfenoetmoidal, e o ponto Pt locali-zado na parte anterior da fossa pterigopalatina. Esta linha referencial foi transferida at�� o ponto F, (Linha M ) ponto este localizado na regi��o mais posterio-inferior da tuberosidade maxilar. O espa��o avaliado compreendeu entre a Linha M , at�� a face distal do primeiro molar superior permanente. Na an��lise estat��stica usou-se o teste t (Teste t Student) , e na correla����o entre espa��o e angula����o foi utilizado o coefi-ciente de correla����o de Pearson. Conclu��mos que o espa��o correspondente entre a distal dos primeiros molares superiores permanentes e extremidade da tuberosidade maxilar, na fase inicial e ap��s a movimenta����o distal, n��o �� suficiente para a erup-����o dos segundos e terceiros molares superiores permanentes. A angula����o das coroas na fase inicial e ap��s a movimenta����o distal posicionam-se com angula����es mais para distal. Quanto �� correla����o das angula����es das coroas dos segundos e terceiros molares superiores permanentes e o espa��o para erup����o verificamos que quanto maior a angula����o das coroas para distal, menor os espa��os oferecidos para a erup����o.(AU)

AVALIA����O DO ESPA��O DISPON��VEL PARA ERUP����O DOS SEGUNDOS E TERCEIROS MOLARES SUPERIORES PERMANENTES AP��S A DISTALIZA����O DOS PRIMEIROS MOLARES SUPERIORES PERMANENTES

A presente pesquisa tem como objetivo avaliar cefalometricamente, o espa��o e po-sicionamento das coroas dos segundos e terceiros molares superiores permanentes n��o erupcionados na regi��o da tuberosidade maxilar durante a distaliza����o dos pri-meiros molares superiores, al��m de verificar a correla����o entre estas duas vari��veis. A amostra foi constitu��da de 38 telerradiografias em norma lateral direita, obtidas de 19 pacientes, jovens brasileiros, leucodermas e melanodermas, sendo 6 do sexo masculino e 13 do sexo feminino, com idade m��dia de 9 anos 5 meses 13 dias. A metodologia constou inicialmente da divis��o dos tempos (T1) inicial, e ap��s a distali-za����o do primeiro molar superior permanente em (T2) por um per��odo m��dio de 10 meses e 23 dias. Para avalia����o do espa��o e angula����o das coroas existente utili-zou-se uma Linha referencial intracraniana (Linha M) sendo esta demarcada, a partir de dois pontos, o ponto SE localizado na sutura esfenoetmoidal, e o ponto Pt locali-zado na parte anterior da fossa pterigopalatina. Esta linha referencial foi transferida at�� o ponto F, (Linha M ) ponto este localizado na regi��o mais posterio-inferior da tuberosidade maxilar. O espa��o avaliado compreendeu entre a Linha M , at�� a face distal do primeiro molar superior permanente. Na an��lise estat��stica usou-se o teste t (Teste t Student) , e na correla����o entre espa��o e angula����o foi utilizado o coefi-ciente de correla����o de Pearson. Conclu��mos que o espa��o correspondente entre a distal dos primeiros molares superiores permanentes e extremidade da tuberosidade maxilar, na fase inicial e ap��s a movimenta����o distal, n��o �� suficiente para a erup-����o dos segundos e terceiros molares superiores permanentes. A angula����o das coroas na fase inicial e ap��s a movimenta����o distal posicionam-se com angula����es mais para distal. Quanto �� correla����o das angula����es das coroas dos segundos e terceiros molares superiores permanentes e o espa��o para erup����o verificamos que quanto maior a angula����o das coroas para distal, menor os espa��os oferecidos para a erup����o.(AU)

AVALIA����O DO ESPA��O DISPON��VEL PARA ERUP����O DOS SEGUNDOS E TERCEIROS MOLARES SUPERIORES PERMANENTES AP��S A DISTALIZA����O DOS PRIMEIROS MOLARES SUPERIORES PERMANENTES

A presente pesquisa tem como objetivo avaliar cefalometricamente, o espa��o e po-sicionamento das coroas dos segundos e terceiros molares superiores permanentes n��o erupcionados na regi��o da tuberosidade maxilar durante a distaliza����o dos pri-meiros molares superiores, al��m de verificar a correla����o entre estas duas vari��veis. A amostra foi constitu��da de 38 telerradiografias em norma lateral direita, obtidas de 19 pacientes, jovens brasileiros, leucodermas e melanodermas, sendo 6 do sexo masculino e 13 do sexo feminino, com idade m��dia de 9 anos 5 meses 13 dias. A metodologia constou inicialmente da divis��o dos tempos (T1) inicial, e ap��s a distali-za����o do primeiro molar superior permanente em (T2) por um per��odo m��dio de 10 meses e 23 dias. Para avalia����o do espa��o e angula����o das coroas existente utili-zou-se uma Linha referencial intracraniana (Linha M) sendo esta demarcada, a partir de dois pontos, o ponto SE localizado na sutura esfenoetmoidal, e o ponto Pt locali-zado na parte anterior da fossa pterigopalatina. Esta linha referencial foi transferida at�� o ponto F, (Linha M ) ponto este localizado na regi��o mais posterio-inferior da tuberosidade maxilar. O espa��o avaliado compreendeu entre a Linha M , at�� a face distal do primeiro molar superior permanente. Na an��lise estat��stica usou-se o teste t (Teste t Student) , e na correla����o entre espa��o e angula����o foi utilizado o coefi-ciente de correla����o de Pearson. Conclu��mos que o espa��o correspondente entre a distal dos primeiros molares superiores permanentes e extremidade da tuberosidade maxilar, na fase inicial e ap��s a movimenta����o distal, n��o �� suficiente para a erup-����o dos segundos e terceiros molares superiores permanentes. A angula����o das coroas na fase inicial e ap��s a movimenta����o distal posicionam-se com angula����es mais para distal. Quanto �� correla����o das angula����es das coroas dos segundos e terceiros molares superiores permanentes e o espa��o para erup����o verificamos que quanto maior a angula����o das coroas para distal, menor os espa��os oferecidos para a erup����o.(AU)

Tooth Abnormalities of Number and Position in the Permanent Dentition of Patients With Complete Bilateral Cleft Lip and Palate

Objective: To radiographically evaluate the prevalence of tooth abnormalities of number and position in the permanent dentition of individuals with complete bilateral cleft lip and palate. Design: Cross-sectional retrospective. Setting: Hospital for Rehabilitation of Craniofacial Anomalies, University of Sao Paulo, Bauru, Brazil. Patients: Two hundred five individuals with complete bilateral cleft lip and palate. Interventions: Analysis of patient records and panoramic radiographs. Main outcome measures: Evaluation of hypodontia and supernumerary teeth and analysis of the position of the permanent maxillary lateral incisor in relation to the alveolar cleft. Results: Hypodontia was observed in 144 patients (70.2%), and the highest prevalence was observed for the maxillary lateral incisor. When both lateral incisors were present (43%), they were primarily located on the distal side of the cleft (25%). Supernumerary teeth were observed in 11.7% of individuals. Conclusion: Patients with cleft lip and palate presented high prevalence of hypodontia and supernumerary teeth. The prevailing characteristics of their location may suggest the presence of a similar genetic component for the occurrence of hypodontia and cleft.

Dental anomalies of number in the permanent dentition of patients with bilateral cleft lip: Radiographic study

Objective: To radiographically evaluate the prevalence of dental anomalies in patients with complete and incomplete bilateral cleft lip, comparing the prevalence of anomalies between genders and cleft types. Setting: Hospital for Rehabilitation of Craniofacial Anomalies, University of Sao Paulo (HRAC/USP), Bauru, Sao Paulo, Brazil. Participants: 150 randomly selected panoramic radiographs of individuals with complete or incomplete bilateral cleft lip; patient age 12 to 25 years (mean age 13.8 years). Results: Data were statistically analyzed to compare the possible association between presence of hypodontia and supernumerary teeth, according to gender and cleft type. Among the 150 patients evaluated, 80 (53.3%) were male and 70 (46.6%) were female. Since no statistically significant difference was found in hypodontia between genders, data were grouped for analysis, revealing prevalence of 31.6% for complete clefts and 26.8% for incomplete clefts. Concerning supernumerary teeth, the prevalence for the male patients was 28.2% for complete cleft lip and 29.2% for incomplete cleft lip. For female patients, the prevalence was significantly (p = .006) lower for complete cleft lip (17.5%) than for incomplete cleft lip (46.6%). Conclusions: The present results suggest that the prevalence of hypodontia was higher in patients with complete cleft lip, and the prevalence of supernumerary teeth was higher in patients with incomplete cleft lip, in agreement with previous studies.

Absence or weak correlation between chewing side preference and lateralities in primary, mixed and permanent dentition

Objectives: To determine whether chewing side preference (CSP) is correlated to lateralities (handedness, footedness, eyedness and earedness) in primary, mixed and permanent dentitions.Design: Three-hundred subjects were divided into 3 groups: Group 1-100 children 3-5 years old, primary dentition; Group 2-100 children 6-12 years old, mixed dentition; Group 3 - 100 subjects 18-47 years old, permanent dentition. CSP was determined using a method developed by Mc Donnell et al.(9) Subjects were given a piece of gum and the position of the chewing gum was recorded 7 times as right or left. Subjects were classified as 'observed preferred chewing side' (OPCS) when they performed 5/7, 6/7 or 7/7 strokes on the same side. OPCS corresponded to the CSP. Laterality tests were performed for handedness, footedness, eyedness and earedness tasks. The Chi-square (chi(2)) and phi correlation (r) tests were used to investigate significant correlations between CSP and sidedness.Results: There was a significant correlation between chewing and earedness (p = 0.00), although there was weak positive correlation (r = 0.30) for primary dentition. There were significant correlations between chewing and handedness (p = 0.02; r = 0.25) and chewing and footedness (p = 0.02; r = 0.26), however, there were weak positive correlations for mixed dentition; there were significant correlations between chewing and handedness (p = 0.02; r = 0.26); chewing and footedness (p = 0.00; r = 0.33) and chewing and earedness (p = 0.01; r = 0.29); however, there were weak positive correlations for permanent dentition.Conclusion: It may be concluded that CSP can be significantly correlated with: earedness for primary dentition; handedness and footedness for mixed dentition; handedness, footedness and earedness for permanent dentition, but these are weak positive relationships. Future work on larger samples of left- and right-sided individuals is required to validate the findings. (C) 2012 Elsevier Ltd. All rights reserved.

Bilateral lower second molar impaction in teenagers: An emergent problem

The frequency of simultaneously impacted second and third molars in teenagers is increasing and becoming a common occurrence in adolescent oral surgery practice. The traditional treatment is the removal of the third molar by conventional access but repositioning of the surgical flap to the distal face of the first molar can predispose to complications such as pericoronitis and delayed healing of the attached gingiva. We present a case in which we use the germectomy approach to remove the impacted third molar for the eruption of the second molar through a vestibular incision. This incision offers excellent bone exposure and exit route for the third molar without disturbing the gingiva attached architecture on the distal face of the first molar providing good healing environment.

Presence and morphology of the molar tubercle according to dentition, hemi-arch and sex

The purpose of this study was to assess the presence and the degree of expression of the molar tubercle according to sex, dentition and hemi-arches. Study casts of 126 patients were assessed, and those were under orthodontic treatment at the University of Franca, UNIFRAN; they were from both sexs, from 4 to 13 years old. The upper second primary molars and the upper first permanent molars, from both sides, were evaluated regarding the presence and the degree of expression of the molar tubercle. For an association study, the qui-square test was utilized. The concordance about the presence or absence of the molar tubercle according to dentition, hemi-arch and sex, was estimated by the Kappa Statistics. There was a sexual dimorphism concerning the presence/absence of the molar tubercle (p=0.009), however there was no significant association between the degree of expression of the tubercle and the sex (p=0.791). The molar tubercle was more frequently observed in the male sex, in upper second primary molars and in the form of depression. There was a significant and "moderate" concordance between the left and right sides in primary dentition (k=0.596), there was a "good" concordance in permanent dentition (k=0.708) and a "weak" and significant concordance between the presence of the molar tubercle and dentition (k=0.207).

Hipomineraliza����o molar-incisivo: preval��ncia, severidade e etiologia em escolares de Araraquara

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Preval��ncia de m�� oclus��o em crian��as com idade escolar

Projeto de P��s-Gradua����o/Disserta����o apresentado �� Universidade Fernando Pessoa como parte dos requisitos para obten����o do grau de Mestre em Medicina Dent��ria

Programa de extra����es seriadas: vari��veis relacionadas com a extra����o de pr��-molares

OBJETIVO: verificar o percentual de pacientes que necessitaram extra����o de dentes permanentes, pr��-molares, dentre aqueles tratados com extra����o de dentes dec��duos para corre����o do apinhamento prim��rio na denti����o mista, bem como analisar as poss��veis vari��veis relacionadas. M��TODOS: a amostra foi composta por documenta����es ortod��nticas de 70 pacientes na denti����o permanente, cujo tratamento iniciou-se na denti����o mista com planejamento de um programa de extra����es seriadas (PES). Todos os prontu��rios foram analisados por um ��nico examinador, no intuito de verificar se o PES havia sido cumprido com a extra����o de dentes permanentes ou se havia sido realizada apenas extra����o de dentes dec��duos. Verificou-se a associa����o entre a extra����o de dentes permanentes e as vari��veis padr��o facial; rela����o sagital entre as arcadas dent��rias; IMPA; propor����o tamanho do segundo molar permanente inferior/espa��o retromolar; mec��nica de controle de espa��o e discrep��ncia de modelo (teste exato de Fisher para as vari��veis categ��ricas e modelo de regress��o log��stica para as vari��veis num��ricas). Os resultados foram considerados para p<0,05. RESULTADOS: dos pacientes que haviam sido tratados com extra����o de dentes dec��duos para a corre����o do apinhamento na denti����o mista, 70% necessitaram de extra����o de dentes permanentes. A an��lise estat��stica n��o mostrou associa����o significativa entre as vari��veis estudadas e a necessidade de extra����o de dentes permanentes, com exce����o da vari��vel discrep��ncia de modelo. CONCLUS��O: a discrep��ncia de modelo representou a principal determinante de extra����o de pr��-molares no PES.

Molar Incisor Hypomineralization

Enamel defects are common alterations that can occur in both the primary or permanent dentition. A range of etiological factors related to this pathology can be found in the literature. Molar Incisor Hypomineralization (MIH) is a kind of enamel defect alteration that requires complex treatment solutions, and for this reason, it is of great clinical interest for dental practice. This article describes the management of a clinical case of MIH in a 7-year-old child. The different treatment options depending on the extension of the defect, the degree of tooth eruption and the hygiene and diet habits of the patient are also discussed.

Double teeth in primary dentition: Report of two clinical cases

Odontogenic anomalies can occur as a result of conjoining or twinning defects. These include fusion, gemination and concrescence. This article presents two case reports of double teeth. In the first case reported, a 4-year-old white boy presented primary double teeth associated to the absence of the right permanent mandibular lateral incisor. In the second case, a 5-year-old white girl had a family history of anomaly in primary dentition. The girl and her mother presented double teeth in the primary dentition. Her mother showed hypodontia in the permanent dentition. Extra and intra oral clinical examination was made in both cases. Radiographic analyses showed the involvement of the permanent tooth. Authors conclude that double teeth in primary dentition have to be carefully analysed as they may be associated with anomalies in the permanent dentition. Correct diagnosis of the condition implicates in a better prognosis for the patient.

Dental caries experience and Molar-Incisor Hypomineralization

Objective. This cross-sectional study assessed the prevalence and severity of the enamel defects, known as Molar-Incisor Hypomineralization (MIH) and its relationship to dental caries. Materials and methods. A sample of 1157 schoolchildren (population based), aged 6-12 years, of the Araraquara city-Brazil, was evaluated according to the European Academy of Paediatric Dentistry (EAPD) criteria by two trained examiners. The dental impact caused by MIH was evaluated with the Decayed, Missing and Filled Teeth (DMFT) index (WHO). Data were analyzed using ANOVA and Chi-square tests (p < 0.05). The socioeconomic status was collected using a questionnaire answered by parents. Results. The prevalence of MIH was 12.3%. Mild impairment was the most frequent diagnosis. DMFT of children with MIH was 0.89 (��1.18), which are higher than those of the unaffected group (0.43 �� 1.01). An association was found between dental caries only in the permanent dentition of children with MIH (p = 0.0001). Family income was considered low in 85% of the families of children with MIH in the public system, while in private school it was 18% (p < 0.05). Conclusion. The prevalence of MIH in Araraquara was associated with greater caries experience in the permanent dentition. �� 2013 Informa Healthcare.