Jeremy Pitman^*; Veronique Christiaens; Jan Cosyn; Maarten Glibert

Department of Periodontology and Oral Implantology, Universiteit Gent, Gent, Belgium

Background: Achieving adequate primary stability during immediate placement cases is often challenging given the limited engagement of bone at the apical end.

Aim/Hypothesis: The aim of this study was to compare the stability of conventionally tapered (CT) versus reverse tapered body shift (RTBS) implants at varying bone support levels in synthetic bone blocks.

Material and Methods: Peak insertion torque measurements of CT and RTBS implants were assessed in synthetic bone blocks at relative bone support levels representing scenarios in which a 13 mm long implant was 100%, 80% 60% and 40% surrounded by bone according to its length (n = 20 for each group).

Results: The mean [95% CI] insertion torque (Ncm) for the CT implants at the 100%, 80%, 60% and 40% relative bone support scenarios was 39.9 [38.38, 41.38], 31.8 [30.91, 32.73], 17.0 [16.40, 17.62] and 10.3 [9.80, 10.70], respectively. Similarly, the mean insertion torque (Ncm) for the RTBS implants at each bone support level was 49.7 [47.54, 51.87], 50.1 [47.42, 52.79], 45.5 [42.99, 48.09] and 23.6 [22.11, 25.13], respectively.

Conclusion and Clinical implications: The difference in insertion torque performance between the CT and RTBS implants was statistically significant (p < 0.001). RTBS implants appear to provide superior stability to CT implants when bone support around the coronal section is limited.

Disclosure of Interest: J. Pitman: None Declared, V. Christiaens Conflict with: Southern Implants, Conflict with: Dentsply, ITI, Southern Implants, J. Cosyn Conflict with: Nobel Biocare, Straumann, Conflict with: Nobel Biocare, ITI, Geistlich, M. Glibert: None Declared.

Keywords: biomechanical stability, dental implants, immediate implant placement

杰里米·皮特曼^* ; 维罗妮克·克里斯蒂安斯；扬·科森；马丁·格里伯特

比利时根特大学牙周病学和口腔种植学系

背景：鉴于根尖端骨的接合有限，在立即放置的情况下实现足够的初始稳定性通常具有挑战性。

目的/假设：本研究的目的是比较传统锥形 (CT) 与反向锥形体移位 (RTBS) 种植体在合成骨块中不同骨支撑水平下的稳定性。

材料和方法：在合成骨块中评估 CT 和 RTBS​​ 植入物的峰值插入扭矩测量值，在相对骨支撑水平下，代表 13 毫米长的植入物 100%、80%、60% 和 40% 被骨骼包围的情况。长度（每组n = 20）。

结果： CT 种植体在 100%、80%、60% 和 40% 相对骨支撑情况下的平均 [95% CI] 插入扭矩 (Ncm) 为 39.9 [38.38、41.38]、31.8 [30.91、32.73]，分别为 17.0 [16.40, 17.62] 和 10.3 [9.80, 10.70]。同样，RTBS 种植体在每个骨支撑水平的平均插入扭矩 (Ncm) 分别为 49.7 [47.54, 51.87]、50.1 [47.42, 52.79]、45.5 [42.99, 48.09] 和 23.6 [22.11, 51.87], 25.

结论和临床意义： CT 和 RTBS​​ 植入物之间的插入扭矩性能差异具有统计学意义（p < 0.001）。当冠状部分周围的骨支撑有限时，RTBS 植入物似乎比 CT 植入物提供了更好的稳定性。

利益披露：J. Pitman：无声明，V. Christiaens 与：Southern Implants 的冲突，与：Dentsply、ITI、Southern Implants、J. Cosyn 的冲突与：Nobel Biocare、Straumann、与：Nobel Biocare、ITI、Geistlich 的冲突, M. Glibert：没有声明。

关键词：生物力学稳定性，种植牙，即刻种植