Biomechanical evaluation of resistance to insertion torque of different implant systems and insertion driver types.
The aim of this study was to quantify the resistance to torque of different implant systems and their connection devices using in vitro torsion tests.



Three internal connection systems, 1 conventional system with internal torque and 1 conventional system with a mounting device used as a control group were tested on 5 groups.



Rupture torque (in newton meter): Biomet 3i Certain group 4 showed a statistically significant higher average (2.65 N·m), followed in order by Biomet 3i Osseotite group 5 (2.18 N·m), Bonelike group 2 (1.80 N·m). Angle deformation/rupture: all groups obtained similar values, without significant differences. Elastic limit (in newton meter): Bonelike group 2 (1.06 N·m) showed similar behavior to group 1 (1.39 N·m) (Nobel Biocare), without significant differences, whereas Bonelike group 3 showed a significantly lower value (0.93 N·m). Maximum torque (in newton meter): Biomet 3i Certain group 4 showed significantly higher values in relation to other groups (2.80 N·m).



The greater contact area the system is built on, the greater resistance against insertion torque, as internal hexagon implants with a greater contact area and external hexagon implants using a mounting device showed higher resistance to insertion torque.
*Oral and Maxillofacial Surgeon and Coordinator, Advanced Implantology Course, P-I Brånemark Institute, São Paulo, Brazil; Coordinator, Graduate Course in Implantodontics, Universidade Sagrado Coração (USC), São Paulo, Brazil. †Professor, Clinica Odontológica Integrada de Adultos, Murcia, Spain; Senior Lecturer, General Dentistry, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain. ‡Assistant Professor, Department of Oral and Maxillofacial Surgery, Universidade Sagrado Coração (USC), São Paulo, Brazil. §Fellow, Master Course in Implantodontics, Universidade Sagrado Coração (USC), São Paulo, Brazil.
Hugo
H
Nary Filho
José Luis
JL
Calvo Guirado
Mariza Akemi
MA
Matsumoto
Marco Dapievi
MD
Bresaola
Roberto
R
Aur
D001696:Biomechanical Phenomena; D015921:Dental Implants / Q000592:standards; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D066298:In Vitro Techniques; D019415:Torque
D015921:Dental Implants