Anil Sukumaran, Aldosari Abdullah Alfarraj
1 Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
J Oral Implantol. 2015 Apr;41(2):144-8. doi: 10.1563/AAID-JOI-D-11-00156. Epub 2013 May 28.
The purpose of this in vitro study was to compare the primary stability and removal torque of bone level and tissue level implants in different bone qualities. Twenty tissue level and bone level implants (3.3 × 10 mm and 4.1 × 10 mm) were used for assessing the stability in type II and type IV bone. Forty bovine rib blocks were used in this study. The primary stability of the implant was measured by the resonance frequency using an Osstel device. The removal torque values (RTV) of the implants was assessed using a digital torque gauge instrument. The implant stability quotient (ISQ) values and the RTV showed a marginally higher stability with bone level implants as compared to tissue level implants. However, these differences were not statistically significant in both type of bone used (P > 0.05). On the other hand, compared to type IV, type II bone showed significant differences in the ISQ (P < 0.01) and RTV (P < 0.001) of bone level and tissue level implants. The study concluded that bone quality is an important factor in establishing primary stability than the implant dimension. Bone level and tissue level implants of same dimensions can be selected based on the esthetic demands since they showed similar mechanical properties.
本体外研究的目的是比较不同骨质量下骨水平种植体和软组织水平种植体的初期稳定性和拆除扭矩。使用了20颗软组织水平和骨水平种植体（3.3×10毫米和4.1×10毫米）来评估II型和IV型骨中的稳定性。本研究使用了40个牛肋骨块。通过使用Osstel设备的共振频率来测量种植体的初期稳定性。使用数字扭矩测量仪评估种植体的拆除扭矩值（RTV）。与软组织水平种植体相比，骨水平种植体的种植体稳定性商数（ISQ）值和RTV显示出略高的稳定性。然而，在所用的两种类型的骨中，这些差异均无统计学意义（P>0.05）。另一方面，与IV型相比，II型骨在骨水平和软组织水平种植体的ISQ（P<0.01）和RTV（P<0.001）方面显示出显著差异。该研究得出结论，与种植体尺寸相比，骨质量是建立初期稳定性的重要因素。由于具有相似的力学性能，可根据美学需求选择相同尺寸的骨水平和软组织水平种植体。
