Impact of abutment microstructure and insertion depth on crestal bone changes at nonsubmerged titanium implants with platform switch
Impact of abutment microstructure and insertion depth on crestal bone changes at nonsubmerged titanium implants with platform switch
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DOI：
10.1111/clr.12478
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发表时间：
2015-03-01
影响因子：
4.3
通讯作者：
Becker, Juergen
中科院分区：
文献类型：
--
作者：
Schwarz, Frank;Mihatovic, Ilja;Becker, Juergen
目的评价微槽基台和插入深度对平台转换钛种植体牙槽骨变化的影响。材料与方法（锥形基台连接）插入n=6只猎狐犬的每个半下颌骨中，种植体肩（IS）位于上嵴，上嵴（+1mm），或牙槽嵴下（~ 1 mm）位置，并随机（开口设计）与机加工或部分微槽愈合基台连接。在20周时，对组织活检进行组织学检查。（主要结果：结果IS的牙槽嵴下定位往往与两个加工位置的较高平均NET值（mm）相关，（嵴下[-0.720.32] >嵴顶[-0.34 +/- 0.21] >嵴上[+0.20 +/- 0.64]）和微槽（顶下[-0.48 +/- 0.25] >顶上[-0.13 +/- 0.54] >顶上[+0.33 +/- 0.58]）基台。然而，这些差异未能达到statistical significance.ConclusionsThe插入深度可能有一个直接的影响在两种类型的基台调查的牙槽嵴骨水平的变化。
ObjectivesTo assess the impact of microgrooved abutments and the insertion depth on crestal bone changes at titanium implants with platform switch.Materials and MethodsA total of n=3 titanium implants (conical abutment connection) were inserted in each hemimandible of n=6 foxhounds with the implant shoulder (IS) located at either epicrestal, supracrestal (+1mm), or subcrestal (-1mm) positions and randomly (split-mouth design) connected with machined or partially microgrooved healing abutments. At 20weeks, tissue biopsies were processed for histological (primary outcome: net bone loss - NET) analyses.ResultsSubcrestal positioning of IS tended to be associated with higher mean NET values (mm) at both machined (subcrestal [-0.720.32] > epicrestal [-0.34 +/- 0.21] > supracrestal [+0.20 +/- 0.64]) and microgrooved (subcrestal [-0.48 +/- 0.25] > epicrestal [-0.13 +/- 0.54] > supracrestal [+0.33 +/- 0.58]) abutments. However, these differences failed to reach statistical significance.ConclusionsThe insertion depth may have a direct influence on crestal bone-level changes at both types of abutments investigated.