Department of Prosthodontics, Sharavathi Dental College and Hospital, Shivamogga, Karnataka, India.
Department of Dentistry, ESICMC PGIMSR Medical College, Bengaluru, Karnataka, India, Phone: +91 9447612454, e-mail:
J Contemp Dent Pract. 2021 Jun 1;22(6):665-668.
Evaluation and comparison of insertion torque (IT) and the implant stability of two different implant macrogeometry in different bone densities using resonance frequency analysis.
A total of 48 implants (with two implant types having regular and novel macrogeometry) were classified into 4 groups with 12 samples in each group. Group A regular implant without surface treatment, group B regular implant with surface treating, group C novel implant deprived of surface treating, and group D was new dental implant with surface treatment were used. Implant stability quotient (ISQ), implant IT, removal torque (RT) percentage, and torque reduction percentage were calculated.
The mean ± SD ISQ value of bone 1 in group A was 56.7 ± 3.2, in group B was 58.6 ± 2.4, in group C was 57.1 ± 3.5, and in group D was 59.3 ± 2.9. In bone 2, the value was 57.8 ± 1.4, 59.5 ± 1.5, 58.2 ± 2.6, and 59.5 ± 2.4 among A, B, C, and D groups correspondingly. In bone 3, it was 59.4 ± 2.4, 60.3 ± 2.3, 60.4 ± 2.8, and 62.7 ± 2.5 among A, B, C, and D groups correspondingly. In bone 4, it was 67.2 ± 3.4, 69.5 ± 2.7, 68.7 ± 2.4, and 69.4 ± 2.3 among A, B, C, and D groups correspondingly. There was a substantial difference in IT and nonsignificant difference in RT in different groups.
There was a low IT value with new implant macrogeometry as compared to regular implant macrogeometry. There was absence of association between IT and implant stability.
Calculation of torque insertion score helps in implant placement. Higher bone density scores produce a higher option of decreasing the initial torque. Low IT of new implant types is useful to reduce failure.
使用共振频率分析评估和比较两种不同宏观几何形状的种植体在不同骨密度下的植入扭矩（IT）和种植体稳定性。
总共使用 48 个种植体（两种具有常规和新型宏观几何形状的种植体类型），分为 4 组，每组 12 个样本。A 组为无表面处理的常规种植体，B 组为表面处理的常规种植体，C 组为无表面处理的新型种植体，D 组为表面处理的新型种植体。计算种植体稳定性指数（ISQ）、种植体 IT、去除扭矩（RT）百分比和扭矩减少百分比。
A 组骨 1 的平均±SD ISQ 值为 56.7±3.2，B 组为 58.6±2.4，C 组为 57.1±3.5，D 组为 59.3±2.9。在骨 2 中，A、B、C 和 D 组的值分别为 57.8±1.4、59.5±1.5、58.2±2.6 和 59.5±2.4。在骨 3 中，A、B、C 和 D 组的值分别为 59.4±2.4、60.3±2.3、60.4±2.8 和 62.7±2.5。在骨 4 中，A、B、C 和 D 组的值分别为 67.2±3.4、69.5±2.7、68.7±2.4 和 69.4±2.3。不同组间 IT 差异有统计学意义，RT 差异无统计学意义。
新型种植体宏观几何形状的 IT 值较低，与常规种植体宏观几何形状相比。IT 与种植体稳定性之间无关联。
扭矩插入评分的计算有助于种植体的植入。较高的骨密度评分提供了降低初始扭矩的更高选择。新型种植体类型的低 IT 有助于降低失败率。
