Teixeira Mayla Kezy Silva, de Moraes Rego Mariana Ribeiro, da Silva Marcelo Ferreira Torres, Lourenço Eduardo José Veras, Figueredo Carlos Marcelo, Telles Daniel Moraes
Department of Prosthodontics, Faculty of Odontology, Rio de Janeiro State University, Rio de Janeiro, Brazil.
Military police dentist, Rio de Janeiro, Brazil.
J Oral Implantol. 2019 Dec;45(6):469-473. doi: 10.1563/aaid-joi-D-18-00222. Epub 2019 Sep 19.
The aim of this clinical study was to evaluate bacterial colonization, marginal bone loss, and optical alveolar density in implants with Morse taper (MT) and external hexagon (EH) connections. Thirty-five implants were installed in 7 patients (mean age: 65.8 ± 6.7 years). Implants were divided into 2 groups, according to platform design: G1 - MT, installed 2mm infra-osseous and G2 - EH, positioned according to Branemark protocol. Patients were evaluated at baseline (T0), 21 days (T1), 3 months (T2), 6 months (T3), and 12 months (T4) after installations. Bone loss and alveolar density were evaluated by standardized periapical radiographs and bacterial profile with checkerboard DNA-DNA hybridization. Statistical analyses were performed using SPSS 23.0. To present the results, boxplots and a line graph of mean were used. -values ≤ .05 were statistically significant. After 3 months, alveolar bone loss was significantly higher in the G2 (T2-T0: = .006; T3-T0: = .003; and T4-T0: = .005). No significant differences between G1 and G2 groups were observed for optical alveolar density. Microbiological analysis showed similar profiles between studied groups; however, there were significantly higher counts of ( = .048), ( = .038), and ( = .027) in G1 after 12 months. Based on the results of this study, it can be concluded that there was less peri-implant bone loss in MT compared to EH connections, but microbiological profile did not seem to influence bone changes.
本临床研究的目的是评估采用莫氏锥度（MT）和外六角（EH）连接的种植体的细菌定植、边缘骨丢失和牙槽骨密度。在7例患者（平均年龄：65.8±6.7岁）中植入了35颗种植体。根据种植体平台设计，将种植体分为2组：G1 - MT，植入骨下2mm处；G2 - EH，按照Branemark方案定位。在植入后基线（T0）、21天（T1）、3个月（T2）、6个月（T3）和12个月（T4）对患者进行评估。通过标准化根尖片评估骨丢失和牙槽骨密度，并采用棋盘式DNA - DNA杂交技术分析细菌谱。使用SPSS 23.0进行统计分析。为呈现结果，采用了箱线图和均值线图。P值≤0.05具有统计学意义。3个月后，G2组的牙槽骨丢失明显更高（T2 - T0：P = 0.006；T3 - T0：P = 0.003；T4 - T0：P = 0.005）。G1组和G2组在牙槽骨密度方面未观察到显著差异。微生物学分析显示，研究组之间的细菌谱相似；然而，12个月后G1组的[具体细菌名称1]（P = 0.048）、[具体细菌名称2]（P = 0.038）和[具体细菌名称3]（P = 0.027）计数明显更高。基于本研究结果，可以得出结论，与EH连接相比，MT连接的种植体周围骨丢失更少，但微生物谱似乎并未影响骨变化。
