RESUMO
OBJECTIVES: The primary aim of this study is to evaluate the success rate of immediately inserted dental implants in sinus lift and the secondary aim is to assess the reliability of performing simultaneous surgery for sinus lift, grafting and implant placement in situations of very low residual bone heights (<4 mm) in the posterior maxillae. MATERIALS AND METHODS: A series of consecutive patients who sought dental implant rehabilitation were included in this study. The sinus lift cases were selected and divided into two groups based on the maxillary alveolar height, ≥4 mm of radiographically measurable bone height (Group 1) and < 4 mm of bone height (Group 2). RESULTS: A total of 13 implants were installed in Group 1, whereas 8 implants were installed in Group 2. The success rate for dental implants in the sinus lifts reached 95.2% after a period of 24 months of evaluation, at 100% for Group 1 (bone height ≥ 4 mm) and 87.5% for Group 2 (bone height with < 4 mm). Besides the differences between the percentages of success, statistical differences were not reached when the groups were compared (Fisher's exact test, P = 0.38). CONCLUSIONS: Despite the limitations of this study, including its low number of participants, the results indicate that simultaneous surgery for sinus lifting, grafting and dental implants in posterior maxillae with very low bone heights (<4 mm) can be performed safely, although with lower success rates than found in patients with higher residual bone heights (>4 mm).
RESUMO
As reconstruções na região posterior da mandíbula são bastante complexas e exigem habilidade do cirurgião. O enxerto em bloco é uma boa opção de tratamento, pois é uma técnica fácil quando comparada com as demais alternativas, porém apresentam alto índice de exposição do enxerto. Os autores apresentam 21 casos que necessitavam de reconstrução óssea, sendo 15 para ganho em espessura e cinco para ganho em altura, tratados com enxerto em bloco utilizando incisão em fundo de sulco. Cinco meses depois os implantes foram instalados. Dos enxertos instalados dois apresentaram exposição do bloco, mas mesmo estes permitiram a instalação dos implantes planejados; apenas em um caso foi necessário o uso de regeneração tecidual guiada.
Assuntos
Humanos , Implantação Dentária Endóssea , TransplantesRESUMO
PURPOSE: To estimate the incidence of traumatic dental injuries (TDI) and determining risk factors in adolescents in Luzerna, Brazil, over a period of three years. MATERIALS AND METHODS: A longitudinal study was carried out with adolescents born in 1988 and 1989 attending the schools of the city. Two examinations were performed in the adolescents in the year 2001 and 2004. The sample size was 176 individuals; however, it was decided to invite all 246 students enrolled in 2001. Clinical examinations were carried out through criteria for TDI used in the National Survey, UK, in 1994. RESULTS: The incidence ratio was of 13.2% (CI 95% 7.9-18.5). The incidence among males was 15.1% (CI 95% 7.6-22.6) and among females 11.0% (CI 95% 3.9-18.1) (p = 0.440) with a relative risk (RR) of 1.38 (CI 95% 0.60-3.14). In relation to increased incisal overjet, the incidence ratio in the exposed individuals was found to be 21.2% (CI 95% 7.3-35.1) and in the nonexposed 11.1% (CI 95% 5.7-16.8) (p = 0.122). Individuals exposed to an increased incisal overjet presented an RR of 1.91 (CI 95% 0.84-4.34). The incidence in the individuals exposed to inadequate lip coverage was 12.5% (CI 95% 2.3-22.7) and in the non-exposed it was 13.4% (CI 95% 7.4-19.5) (p = 0.879). The RR among the exposed was 0.93 (CI 95% 0.36-2.38). CONCLUSION: The incidence of TDI was 13.2%. For males, having increased incisal overjet and inadequate lip coverage were not considered as risks factors.
