ObjectivesThe aim of the present study was to compare a novel tapered, double‐threaded self‐tapping tissue‐Level design implant (TLC) to a well‐established parallel walled tissue‐level (TL) implant in terms of primary and secondary stability over time.Materials and MethodsTest TLC (n = 10/per timepoint) and control TL (n = 10/per timepoint) implants were placed in the mandible of minipigs and left for submerged healing for 3, 6, and 12 weeks. Maximum insertion torque and implant stability quotient (ISQ) were measured for each implant at placement. Osseointegration and cortical bone maintenance were histologically evaluated by measuring total bone‐to‐implant contact (BIC) and first bone‐to‐implant contact (fBIC).ResultsA significantly higher maximum insertion torque was measured for the test implant TLC compared to the control TL implant (57.83 ± 24.73 Ncm and 22.62 ± 23.16 Ncm, respectively; p < .001). The mean ISQ values were comparable between the two implant types (75.00 ± 6.70 for TL compared to 75.40 ± 3.20 for TLC, p = .988). BIC was comparable between both implant types at each of the evaluated time points. The fBIC was found to be significantly more coronal at 12 weeks for the TLC implant compared to the TL implant (0.31 ± 0.83 mm for TLC compared to −0.22 ± 0.85 for TL, p = .027).ConclusionThe novel tapered tissue level design implant showed improved primary stability and an overall improved crestal bone height maintenance compared to the parallel walled design at 12 weeks.

中文翻译：

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比较新型锥形设计组织级种植体与平行设计组织级种植体的初级稳定性和骨整合。体内实验研究


目的本研究的目的是比较新型锥形双螺纹自攻组织水平设计种植体 (TLC) 与成熟的平行壁组织水平 (TL) 种植体随时间的初级和次级稳定性材料和方法将测试 TLC（n = 10/每个时间点）和对照 TL（n = 10/每个时间点）种植体放置在小型猪的下颌中，并进行埋入愈合 3、6 和 12 周。在植入时测量每个种植体的最大插入扭矩和种植体稳定性商（ISQ）。通过测量总骨与种植体接触 (BIC) 和首次骨与种植体接触 (fBIC)，对骨整合和皮质骨维持进行组织学评估。结果与对照 TL 相比，测试种植体 TLC 测得的最大插入扭矩显着更高种植体（分别为 57.83 ± 24.73 Ncm 和 22.62 ± 23.16 Ncm；p < .001）。两种种植体类型的平均 ISQ 值相当（TL 为 75.00 ± 6.70，TLC 为 75.40 ± 3.20，p = .988）。两种种植体类型在每个评估时间点的 BIC 相当。与 TL 种植体相比，TLC 种植体在 12 周时的 fBIC 明显更靠近冠状面（TLC 为 0.31 ± 0.83 mm，TL 为 -0.22 ± 0.85，p = .027）。结论新型锥形组织水平设计种植体与平行壁设计相比，第 12 周时表现出改善的初级稳定性和整体改善的牙槽嵴骨高度维持。