Comuzzi Luca, Tumedei Margherita, Di Pietro Natalia, Romasco Tea, Heydari Sheikh Hossein Hamid, Montesani Lorenzo, Inchingolo Francesco, Piattelli Adriano, Covani Ugo
Independent Researcher, San Vendemiano-Conegliano, 31020 Treviso, Italy.
Department of Medical, Surgical, and Dental Sciences, University of Milan, 20122 Milan, Italy.
Materials (Basel). 2023 Jul 18;16(14):5064. doi: 10.3390/ma16145064.
Combining tooth extraction and implant placement reduces the number of surgical procedures that a patient must undergo. Thus, the present study aimed to compare the stability of two types of conical implants (TAC and INTRALOCK) and another cylindrical one (CYROTH), inserted with a range of angulation of 15-20 degrees in low-density polyurethane blocks (10 and 20 pounds per cubic foot, PCF) with or without a cortical lamina (30 PCF), which potentially mimicked the post-extraction in vivo condition. For this purpose, a total of 120 polyurethane sites were prepared (10 for each implant and condition) and the Insertion Torque (IT), Removal Torque (RT), and Resonance Frequency Analysis (RFA) were measured, following a Three-Way analysis of variance followed by Tukey's post hoc test for the statistical analysis of data. The IT and RT values registered for all implant types were directly proportional to the polyurethane density. The highest IT was registered by INTRALOCK implants in the highest-density block (32.44 ± 3.28 Ncm). In contrast, the highest RFA, a well-known index of Implant Stability Quotient (ISQ), was shown by TAC implants in all clinical situations (up to 63 ISQ in the 20 PCF block without the cortical sheet), especially in lower-density blocks. Although more pre-clinical and clinical studies are required, these results show a better primary stability of TAC conical implants in all tested densities of this post-extraction model, with a higher ISQ, despite their IT.
联合拔牙和种植体植入可减少患者必须接受的外科手术数量。因此，本研究旨在比较两种锥形种植体（TAC和INTRALOCK）以及另一种圆柱形种植体（CYROTH）在低密度聚氨酯块（每立方英尺10和20磅，PCF）中以15 - 20度的一系列角度植入时的稳定性，该聚氨酯块有或没有皮质板（30 PCF），这可能模拟了拔牙后的体内情况。为此，共制备了120个聚氨酯位点（每种种植体和情况10个），并测量了插入扭矩（IT）、移除扭矩（RT）和共振频率分析（RFA），随后进行三因素方差分析，然后进行Tukey事后检验以对数据进行统计分析。所有种植体类型记录的IT和RT值与聚氨酯密度成正比。INTRALOCK种植体在最高密度块（32.44±3.28 Ncm）中记录的IT最高。相比之下，TAC种植体在所有临床情况下（在没有皮质板的20 PCF块中高达63 ISQ），尤其是在低密度块中，显示出最高的RFA，这是一个众所周知的种植体稳定性商数（ISQ）指标。尽管需要更多的临床前和临床研究，但这些结果表明，在这个拔牙后模型的所有测试密度中，TAC锥形种植体具有更好的初始稳定性，ISQ更高，尽管其IT有所不同。
