Department of Periodontology, School of Dental Medicine, Stony Brook University, Stony Brook, NY, USA.
Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, NY, USA.
Clin Oral Implants Res. 2018 Jun;29(6):649-655. doi: 10.1111/clr.12792. Epub 2016 Feb 24.
The aim of this study was to evaluate the primary, initial stability of Porous Tantalum Trabecular Metal implants (TM) compared with Tapered Screw Vent implants (TSV) with different diameters, inserted in two bone densities.
A total of 160 implants (80 TM and 80 TSV) with narrow (3.7 mm) and conventional (4.1 mm) diameters and the same length (10 mm) were placed in artificial bone blocks representing bone qualities II and IV. The implant stability was evaluated by insertion torque (IT) and Resonance Frequency Analysis. Statistical analysis was performed with non-parametric Kruskal-Wallis test with Dunn post-test for the differences between groups.
The results showed higher ISQ values in dense bone compared with soft bone for all the groups (P < 0.05). Conventional-diameter implants (TSV and TM) showed higher ISQ and IT values compared with narrow implants (TSV and TM) in dense and soft bone (P < 0.05). Tapered TSV implants showed higher stability in soft bone compared with TM implants (P < 0.05). In dense bone, differences were not observed between narrow TSV 3.7 mm and TM 3.7 mm implants (P > 0.05).
Within the limitations of this study, it can be concluded: In dense bone blocks, the wider diameter implants are more stable than narrow implants. In soft bone blocks, the tapered TSV implants are more stable than TM implants.
本研究旨在评估多孔钽小梁金属植入物（TM）与不同直径的锥形螺钉通风植入物（TSV）在两种骨密度下的初始稳定性。
共放置 160 个植入物（80 个 TM 和 80 个 TSV），具有窄（3.7mm）和常规（4.1mm）直径，长度相同（10mm），放置在代表骨质量 II 和 IV 的人工骨块中。通过插入扭矩（IT）和共振频率分析评估植入物的稳定性。采用非参数 Kruskal-Wallis 检验和 Dunn 后检验对组间差异进行统计分析。
结果显示，所有组的致密骨中的 ISQ 值均高于松质骨（P<0.05）。与窄径植入物（TSV 和 TM）相比，常规直径植入物（TSV 和 TM）在致密骨和松质骨中具有更高的 ISQ 和 IT 值（P<0.05）。与 TM 植入物相比，锥形 TSV 植入物在松质骨中具有更高的稳定性（P<0.05）。在致密骨中，3.7mm 窄径 TSV 和 3.7mm TM 植入物之间没有观察到差异（P>0.05）。
在本研究的限制范围内，可以得出结论：在致密骨块中，较宽直径的植入物比窄径植入物更稳定。在松质骨块中，锥形 TSV 植入物比 TM 植入物更稳定。
