OBJETIVO: Avaliar a área relativa do seio maxilar em maxila desdentada posterior quanto à área linear, presença de septos ósseos e sinusopatias. MÉTODOS: Foi realizado um estudo longitudinal retrospectivo de exames tomográficos em 60 indivíduos entre 35 e 75 anos e como critério de inclusão, a maxila posterior desdentada uni ou bilateralmente. As medições foram realizadas pelo programa em 101 seios maxilares. As medidas horizontais e verticais de cada seio foram multiplicadas e resultaram em área linear em mm². RESULTADOS: Dos 101 seios maxilares avaliados, 14 apresentaram sinusopatias (13,86%) e 22 (21,78%) com septos ósseos. A média mesio distal foi de 38,4 mm (p ≤ 0,05), a altura média de 34, 5 mm (p ≤ 0,05) e área linear média de 1335,88 mm² (p = 0,05). Foi aplicado o teste t de Student e análise de variância (ANOVA) para análise estatística. Não houve diferenças estatísticas significantes na altura e largura dos seios maxilares desdentados entre os gêneros, mas houve uma variação da área linear bem como a constatação da presença de septos ósseos e sinusopatias. CONCLUSÃO: A conclusão deste trabalho corrobora com estudos anteriores sobre a necessidade dos exames por imagem com a finalidade de obter informações quanto as dimensões do seio maxilar norteando a quantidade de material de enxertia bem como a escolha da região doadora, a presença de septos orientando a técnica de levantamento de seio e a presença de sinusopatias que implica em tratamento prévio à cirurgia de enxertos.

OBJECTIVE: To evaluate the relative area of the maxillary sinus in edentulous posterior maxilla with regard to linear area, bone septa and sinus pathologies. METHODS: A retrospective longitudinal study was conducted of tomographic exams in 60 individuals between 35 and 75 years of age, with the inclusion criteria being the uni- or bilateral edentulous posterior maxilla. Measurements were taken by the program in 101 maxillary sinuses. The horizontal and vertical measurements of each sinus were multiplied and resulted in a linear area in mm2. RESULTS: Of the 101 maxillary sinuses evaluated, 14 presented sinus pathologies (13.86%) and 22 (21.78%) with bone septa. The mean mesio distal distance was 38.4 mm (p ≤ 0.05), mean height 34. 5 mm (p ≤ 0.05) and mean linear area of 1335.88 mm² (p = 0.05). The Student's-t and analysis of variance (ANOVA) tests were applied for statistical analysis There were no statistically significant difference in the height and width of the edentulous maxillary sinuses between genders, but there was a variation in the linear area and the finding of the presence of bone septa and sinus pathologies. CONCLUSION: The conclusion of this study corroborates those of previous study about the need for imaging exams with the purpose of obtaining information about the dimensions of the maxillary sinus, as guidance with regard to the quantity of graft material, choice of donor region, and presence of septa. These data serve as guidance in the sinus lift technique and the presence of sinus pathologies, which involve treatment before bone graft surgeries.

At present the major consideration in planning an implant design is to seek biocompatible surfaces that promote a favorable response from both cells and host tissues. Different treatments of implant surfaces may modulate the adhesion, proliferation and phenotypic expression of osteoblastic cells. For this reason, the aim of the present study was to evaluate the biocompatibility of an implant surface, observing adhesion, cell morphology and proliferation of osteoblast-like cells cultivated on a commercially available titanium dental implant (Titamax Liso®, Neodent, Curitiba, PR, Brazil). The implant samples were immersed into an osteoblast-like cell (Osteo-1) suspension for a period of 24, 48 and 72 hours. After seeding the cells, the samples were prepared for analyses through scanning electron microscopy. Based on the surface analysis, the osteoblastic cells adhered to the machined surface after 24 hours in culture. In 48 hours, the cells spread over the implant surface, and after 72 hours a proliferation of cells with large and flat bodies was observed over the machined implant surface. These results demonstrate that the machined titanium surface studied is biocompatible since it allowed adhesion and proliferation of the osteoblast-like cells, in addition to preserving cell integrity and the morphologic characteristics of cells during the studied period.