Int J Oral Maxillofac Implants. 2014 Mar-Apr;29(2):296-302. doi: 10.11607/jomi.3141.
The aim of this study was to investigate the influence of interimplant distance of internal connection implants with platform switching on crestal bone loss using radiographic evaluation.
The present study included patients missing two consecutive teeth in the posterior quadrant and receiving internal connection implants. Digital periapical radiographs were taken at the time of superstructure connection and at the time of more than 1 year of loading. Bone level change was measured on the modified image using a digital subtraction program. The crestal bone loss between implants and the horizontal and vertical loss of peri-implant marginal bone were evaluated, and the influence of interimplant distance on crestal bone loss was analyzed at α = .05.
A total of 10 pairs of implants having ≤ 3 mm of interimplant distance was included in this study (group 1). The other 15 pairs of implants having > 3 mm of interimplant distance were selected as a control group (group 2). After the mean 19.3 months of observation, the mean crestal bone loss between implants was -0.26 ± 0.14 mm in group 1 and -0.23 ± 0.29 mm in group 2 (P > .05). There was no significant difference between the interimplant distance and the crestal bone loss according to the regression analysis (P = .765). The mean horizontal and vertical marginal bone loss was -0.18 ± 0.25 mm and -0.15 ± 0.18 mm, respectively, in group 1 and -0.17 ± 0.31 mm and -0.11 ± 0.33 mm, respectively, in group 2. There were no significant differences between outside and inside bone loss of implants in horizontal and vertical change (P > .05).
Within the limitations of the short-term study, the interimplant distance did not affect the crestal bone loss with internal connection implants with platform switching. The horizontal and vertical marginal bone loss was found to be too small to result in overlapping loss of the interimplant crestal bone.
本研究旨在通过放射学评估研究具有平台转换的内连接种植体的种植体间距离对骨吸收的影响。
本研究纳入了在后牙区缺失连续两颗牙并接受内连接种植体的患者。在修复体连接时和加载 1 年以上时拍摄数字化根尖片。使用数字减影程序测量改良图像上的骨水平变化。评估种植体之间的边缘骨吸收量和种植体周围边缘骨的水平和垂直吸收量，并在 α =.05 时分析种植体间距离对边缘骨吸收的影响。
本研究共纳入了 10 对种植体间距离≤3mm 的种植体（组 1）。另外 15 对种植体间距离>3mm 的种植体被选为对照组（组 2）。经过平均 19.3 个月的观察，组 1 种植体之间的平均边缘骨吸收量为-0.26±0.14mm，组 2 为-0.23±0.29mm（P>.05）。回归分析显示，种植体间距离与边缘骨吸收量之间无显著差异（P=0.765）。组 1 的水平和垂直边缘骨吸收量平均值分别为-0.18±0.25mm 和-0.15±0.18mm，组 2 分别为-0.17±0.31mm 和-0.11±0.33mm。种植体的水平和垂直骨吸收量内外侧之间无显著差异（P>.05）。
在短期研究的限制范围内，具有平台转换的内连接种植体的种植体间距离不会影响边缘骨吸收。水平和垂直边缘骨吸收量太小，不会导致种植体间边缘骨的重叠吸收。
