Facial profile of patients with congenitally missing 2 mandibular incisors and changes of facial profile before and after orthodontic treatment by extraction of 2 maxillary premolars / 吉林大学学报(医学版)

Objective: To analyze the facial profile of the patients with congenitally missing 2 mandibular incisors, and to investigate the changes of facial profile of the patients before and after orthodontic treatment by extraction of 2 maxillary premolars. Methods: The cephalometrics of 64 patients with congenitally missing 2 mandibular incisors were collected. The initial cephalometrics of 64 patients were used to characterize the facial profile. A total of 38 cases among all the 64 patients underwent the orthodontic treatment by extraction of 2 maxillary premolars, and the initial and final cephalometrics were used to compare the changes of facial profile before and after treatment. The cephalometric measurement (including hard tissue and soft tissue items) was performed and the results were analyzed statistically. Results: Compared with the normal values, the overjet, overbite, ANB, U1-NA angle, face angle, Y axis, Pg-NB, face convexity, soft tissue facial angle, H angle, and men to labial sulcus to H-Line in the patients with congenitally missing 2 mandibular incisors were increase d, SNB, L1-NB angle, L1-NB distance, L1-MP, occlusal plane angle, mentolabial sulcus angle were decreased, and the differences were statistically significant (P<0. 05). After orthodontic extraction treatment, the overjet, overbite, U1-NA angle, U1-NA distance, U1-SN, H angle, and subnasale to H-Line of the patients were decreased, the L1-NB angle, L1-NB distance, L1-MP, occlusal plane angle, Pg-NB, and mentolabial sulcus angle were increased; the differences were statistically significant (P<0. 05). Conclusion: The mandibular development is insufficient but the chin development is adequate in the patients with congenitally missing 2 mandibular incisors, with larger overjet and overbite, lingually inclined mandibular incisors, deeper and sharper mentolabial sulcus. After treatment by extraction of 2 maxillary premolars, the overall appearance of the lateral profile of the patients remains unchanged, but the occlusion of anterior teeth is significantly improved.

Prevalence of hypodontia in nine- to fourteen-year-old children who attended the Mashhad School of Dentistry.

Context: Hypodontia is defined as the congenital absence of one or a few teeth, and is also the most common anomaly in dental development. This condition occurs either individually or as part of the symptoms of a syndrome, and it is more common in permanent teeth than in deciduous teeth, reporting a prevalence of between 1.6 and 9.6%. Aims: The objective of this study is to investigate the prevalence of hypodontia for permanent teeth in nine- to 14-year-old children who attended the Mashhad School of Dentistry in 2007. Setting and Design: We conducted this descriptive, analytical, cross-sectional study, to determine the mentioned aims. Materials and Methods: In this descriptive, cross-sectional study, panoramic radiographs belonging to 600 children (351 girls and 249 boys), aged nine to 14 years, were available for examination. All related findings were recorded in the respective forms. Statistical Analysis Used: The data were processed using Exact and Chi-square tests. Results: The prevalence of hypodontia in the girls was 9.2%, in the boys 8.8%, and in both sexes combined 9%. The most and the least frequent cases of absent teeth were the mandibular second premolars and the maxillary central incisor (only one child), respectively. The most commonly absent teeth were the mandibular second premolars, the maxillary lateral incisors, the mandibular central incisor, and the maxillary second premolars, in that order. Conclusions: This study showed a high frequency of hypodontia among the understudied population. Thus, due to the complicated treatment, accurate examination of children for on-time diagnosis of this developmental anomaly is crucial.

Management of a patient with congenitally missing lateral incisor: a multidisciplinary team approach / Tratamento de um paciente com ausência congênita de um incisivo lateral: uma abordagem multidisciplinar

OBJECTIVE: The present paper highlights a case where the patients presented with spacing in the upper anterior region due to missing right lateral and peg shaped left lateral incisor. METHOD AND RESULTS: The initial treatment was standard edgewise fixed orthodontic appliance to distalize the canine, correct the bite and create space for the lateral incisors and correct the midline. CONCLUSION: After the active phase of fixed orthodontic treatment, an implant was placed and the peg shaped lateral incisor was built up with composite.

OBJETIVOS: O presente artigo refere-se a um caso em que o paciente apresentava espaços na região anterior da maxila devido à ausência de incisivo lateral direito e incisivo lateral esquerdo com coroa deformada. MÉTODO E RESULTADO: O tratamento inicial foi ortodontia fixa (edgewise) para distalizar o canino, corrigir a mordida e criar espaço para o incisivo lateral e corrigir a linha média. CONCLUSÃO: Após a fase ativa da ortodontia, utilizou-se um implante adequado na região do lateral direito e reconstruiu-se a coroa deformada do incisivo lateral esquerdo com compósito.

Prevalencia de caries y alteraciones dentales en niños con labio fisurado y paladar hendido de una fundación de Santiago de Cali / Caries and dental alteration prevalence in cleft lip and palate children in a fundation of Santiago de Cali

Objetivo: Determinar las alteraciones dentales y la prevalecía de caries en niños de 3 a 14 años con labio fisurado y paladar hendido en una Fundación de la ciudad de Santiago de Cali en el 2007.Materiales y métodos: Se realizó un estudio de tipo Observacional descriptivo de corte transversal, en una población de estudio de 30 niños con labio fisurado y paladar hendido entre los 3 y 14 años, que asistían a la fundación operación sonrisa. La recolección de información se realizo mediante una encuesta y un examen clínico analizando caries dental, alteraciones dentarias, y adicional a esto un índice de placa, utilizando el Índice de Higiene oral Simplificado (IHO-S). Resultados: Se encontró que el 100% de la población presentaban alteraciones dentarias, siendo las mas frecuentes apiñamiento con un 70% y anodoncia con 63.3%, para caries dental se encontró una frecuencia del 90% en la población presentando al menos una lesión. Conclusiones: El estrato socioeconómico alto no estuvo presente en la población. La raza blanca fue la que mas se presento en la investigación. La población presento alteraciones dentarias de tamaño, forma y número; Donde el apiñamiento se observo en mayor proporción, en el sexo masculino y la dentición temporal. La caries dental se presento en la mayoría de niños aunque se presento bajo el índice de placa bacteriana; lo cual se puede explicar por los altos porcentajes de Hipoplasia y apiñamientp. La caries se presenta en similar proporción en ambos sexos, y es más frecuente cuando la erupción de estos niños es retardada.

Objective: To de termine the caries and dental alteration prevalence in cleft lip and palate in 3 to 14 years old children in a fundation of Santiago de Cali in 2007. Materials and methods: A sample of 30 children were studied with fissured lip and cleft palate among 3 and 14 years old who were attended by the foundation Smile Operation. The gathering of information was done by a survey and a clinical exam analyzing dental caries, alterations and addition to this a plaque index, using the simplified index of oral Hygiene (SIOH). Results: All of children presented dental alterations, the most frequent alteration was close together teeth in 70% follow of congenitally missing teeth in 63.3%, also dental caries was 90% in the population presenting least one lesion. Conclusions: High socioeconomic level was not present in this sample, and we only conclude for low socioeconomic level. the most of population were white people, all subjects present dental alteration, in dental size, form and amount. Instead low dental plaque index were found in most of children, the experience of caries was high, and in equal proportions in boys and gils.