Ivan Delgado Ricci

Bolton ratio in subjects with normal occlusion and malocclusion

Aim: To verify the presence of Bolton anterior and total discrepancy in Brazilian individuals with natural normal occlusion and Angle’s Class I and Class II, division 1 malocclusions. Methods: The sample was divided in three groups (n=35 each): natural normal occlusion; Class I malocclusion; Class II, division 1 malocclusion. Of the 105 Caucasian Brazilian individuals, 24 were boys and 81 were girls aged from 13 to 17 years and 4 months. The mesiodistal width of the maxillary and mandibular teeth, from the left first molar to the right first molar, was measured on each pre-treatment dental plaster cast using a digital caliper accurate to 0.01 mm resolution. Values were tabulated and the Bolton ratio was applied. The Kolmogorov-Smirnov test was used to verify if data were normally distributed (p>0.2). For comparison between the values obtained and those from the Bolton standard, Student’s t test was used and one-way ANOVA was used for comparisons among the 3 groups, with a significance level of 5% (p<0.05). Results: For groups 1, 2 and 3, respectively, the total ratio found was 90.36% (SD 1.70), 91.17% (SD±2.58) and 90.76% (SD±2.45); and the anterior ratio was 77.73% (SD 2.39), 78.01% (SD 2.66) and 77.30% (SD 2.65). Conclusions: There was no significant difference among the groups regarding the values indicated in the Bolton ratio.

Análise do mercado de trabalho odontológico na região nordeste do Brasil

Introducao: O objetivo deste trabalho e avaliar o mercado de trabalho do cirurgiao-dentista, nas diferentesespecialidades, na Regiao Nordeste do Brasil, alem de avaliar a relacao cirurgiao-dentista/habitante eespecialista/habitante, visando melhorar a compreensao dos rumos da profissao, direcionando a atuacao profissional. Material e Metodos: Foram coletados dados do Conselho Federal de Odontologia e do InstitutoBrasileiro de Geografia e Estatistica. Resultados: Os Estados da Regiao Nordeste do Brasil apresentam indices maiores que o recomendado pela Organizacao Mundial de Saude (1:1.500), com excecao da Paraibae do Rio Grande do Norte que apresentam maior proporcao entre habitantes por CD. A Regiao Nordeste concentra 13,59% do total de cirurgioes-dentistas de todo o Brasil. Conclusoes: O mercado de trabalho para os especialistas da Regiao Nordeste nas areas de Protese Buco-Maxilo-Facial, Odontologia do Trabalho, Odontologia Legal, Patologia Bucal e Estomatologia apresenta-se com melhor proporcao de especialista/habitante, enquanto as areas de Ortodontia, Endodontia e Protese Dentaria apresentam maior proporcao de especialista/habitante Introduction: This work aims to evaluate the job market for dental surgeons, within their different specialties,in the Northeast region of Brazil, in addition to evaluating dental surgeon/inhabitant and specialist/inhabitant ratios. This study aims to better understand the trends in this profession, and also suggests sof professional activity. Materials and Methods: Data was collected from the Brazilian National Councilof Odontology and the Brazilian National Institute of Geography and Statistics. Results: The states withinthe Northeast region of Brazil have higher professional/inhabitant ratio levels than recommended by theWorld Health Organization (1:1,500), with the exceptions of the states of Paraiba and Rio Grande do Norte,which feature higher inhabitant/surgeon ratios. This region concentrates 13.59% of all dental surgeonsin Brazil. Conclusions: The job market for specialists in the Northeast region in the s of BucomaxillofacialProsthetics, Workplace Dentistry, Forensic Dentistry, Mouth Pathology and Stomatology featuresthe best specialist/inhabitant ratio, while the s of Orthodontics, Endodontics and Dental Prostheticshave higher specialist/inhabitant ratios

Avaliação rotacional mandibular após os efeitos da disjunção rápida da sutura palatina mediana

The studies concerning the rapid expansion of the median palatine suture, by using some appliances that expand the maxillary dental arch, show that the maxilla moves downward and forward, causing alterations in the occlusion, such as anterior bite opening and an increase of the angles of the occlusal and mandibular planes values. This study aimed at evaluating the alterations after the rapid maxillary expansion by using two types of expanders (Haas – GI and Hyrax – GII). The sample consisted of 93 lateral cephalometric radiographs from 31 Brazilian individuals (15 females and 16 males) between 9 and 16 years of age (mean age 13 years and 2 months). Radiographs were taken from each individual in the pre-expansion, immediately after expansion, and at the conclusion of the leveling stage. Angle measurements PP.GoMe, NBa. GoMe and NS.Gn showed a statistically significant increase in the pre-expansion and the leveling stages in both groups. The clockwise, downward and back rotational displacement of the mandible was verified by the statistically significant increase in the angle measurements studied in the postexpansion stage, remaining in the final leveling stage for both groups.