Cordeiro Bruno Q S, Carvalho Waldimir R, Fonseca Edgard M, Machado Aldir N, Ghiraldini Bruna, Soares Michel A D, Casado Priscila L
Post-Graduation in Dentistry Program, School of Dentistry, Fluminense Federal University (UFF), Niterói 24020140, RJ, Brazil.
Prostheses Department, School of Dentistry, Fluminense Federal University (UFF), Niterói 24020140, RJ, Brazil.
Materials (Basel). 2025 Jul 21;18(14):3403. doi: 10.3390/ma18143403.
Modification of diameter stability after the abutment retention can result in a decrease in the applied torque or affect the peri-implant tissue, compromising the longevity of the treatment. Therefore, this study aimed to investigate how different connection angles (11.5° and 16.0°) at the implant-abutment interface influence implant diameter stability under the manufacturer's recommended torque.
Eighty Morse cone-type implant specimens were divided into two groups, with different internal conicity angles: 11.5° ( = 40) and 16.0° ( = 40). Implants varied in diameter (mm): 3.5, 3.8, 4.5, and 5.0. Initial measurements of the implants' external diameter were carried out. After these measurements, all implants received the abutment installation, and a final measurement of the external implant diameter was performed.
Considering the comparative analysis between the final and initial diameters, a non-significant increase in diameter, in the cervical implant region, after torque on the abutment, was observed. The torque applied to the abutments did not produce deformations in the cervical area of Morse taper implants.
The torque applied to the abutment screw in implants with a Morse taper connection does not cause deformation in the cervical area of the implant body in implant with 11.5° and 16.0° conicity angles.
基台固位后直径稳定性的改变可能会导致施加扭矩的降低或影响种植体周围组织，从而损害治疗的长期效果。因此，本研究旨在探讨种植体-基台界面处不同的连接角度（11.5°和16.0°）在制造商推荐扭矩下如何影响种植体直径稳定性。
将80个莫氏锥度型种植体标本分为两组，具有不同的内锥度角：11.5°（n = 40）和16.0°（n = 40）。种植体直径（mm）分别为：3.55、3.8、4.5和5.0。对种植体的外径进行初始测量。在这些测量之后，所有种植体进行基台安装，并对种植体外径进行最终测量。
考虑最终直径与初始直径之间的对比分析，观察到在基台施加扭矩后，种植体颈部区域的直径有不显著的增加。施加在基台上的扭矩未在莫氏锥度种植体的颈部区域产生变形。
对于锥度角为11.5°和16.0°的具有莫氏锥度连接的种植体，施加在基台螺钉上的扭矩不会在种植体主体的颈部区域引起变形。
