Alcântara Paola Rebelatto, Gasparini Kiatake Fontão Flavia, Sartori Ivete Aparecida de Mattias, Moreira Melo Ana Cláudia, Bernardes Sergio Rocha
*Master Student, Latin American Institute of Dental Research and Education. †Assistant Professor, Latin American Institute of Dental Research and Education.
Implant Dent. 2014 Oct;23(5):555-9. doi: 10.1097/ID.0000000000000154.
To evaluate bone response in the posterior area of edentulous mandibles rehabilitated with fixed prosthesis supported on dental implants considering baseline severity of mandibular atrophy.
The sample included 15 patients in whom 5 implants were inserted between the mental foramens. The prosthesis followed a cantilever extension from 15 to 20 mm. They were divided into 2 groups (severe and moderate) according to the degree of the atrophy presented. Panoramic x-ray and computerized tomography were obtained immediately after rehabilitation (T0) and after 8 months (T8). Linear measurements of the alveolar bone height at the posterior area of the mandible, 5, 10, and 15 mm from the long axis of the most distal implants, were recorded. Density measurements were also achieved at the same sites.
A slight bone increase in both groups was observed but with no statistically significant difference according to the baseline degree of atrophy.
There was slight qualitative and quantitative bone improvement in the posterior area of the mandibles with the use of immediately loaded implant-supported fixed prostheses during the observed period. These results suggest that long-term follow-up is very important to understand bone behavior after rehabilitation.
考虑下颌骨萎缩的基线严重程度，评估用种植体支持的固定修复体修复的无牙下颌后部区域的骨反应。
样本包括15例患者，在颏孔之间植入5枚种植体。修复体采用15至20毫米的悬臂延伸。根据所呈现的萎缩程度将他们分为2组（重度和中度）。在修复后即刻（T0）和8个月后（T8）进行全景X线片和计算机断层扫描。记录下颌后部区域距最远端种植体长轴5、10和15毫米处牙槽骨高度的线性测量值。还在相同部位进行密度测量。
两组均观察到轻微的骨增加，但根据萎缩的基线程度无统计学显著差异。
在观察期内，使用即刻负重的种植体支持固定修复体时，下颌后部区域在骨的定性和定量方面有轻微改善。这些结果表明，长期随访对于了解修复后的骨行为非常重要。
