TY - JOUR
T1 - Primary stability, insertion torque, and bone density of conical implants with internal hexagon: Is there a relationship?
AU - Trisi, Paolo
AU - Berardi, Davide
AU - Paolantonio, Michele
AU - Spoto, Giuseppe
AU - D'Addona, Antonio
AU - Perfetti, Giorgio
PY - 2013
Y1 - 2013
N2 - Between implants and peri-implant bone, there should be a minimum gap, without micromotions over a threshold, which could cause resorption and fibrosis. The higher the implant insertion torque, the higher will be the initial stability. The aim was to evaluate in vitro the correlation between micromotions and insertion torque of implants in bone of different densities. The test was performed on bovine bone of hard, medium, and soft density: 150 implants were used, 10 for each torque (20, 35, 45, 70, and 100 N/cm). Samples were fixed on a loading device. On each sample, we applied a 25-N horizontal force. Insertion torque and micromotions are statistically correlated. In soft bone with an insertion force of 20 and 35 N/cm, the micromotion resulted significantly over the risk threshold, which was not found with an insertion force of 45 and 70 N/cm and in hard and medium bones with any insertion torque. The increase in insertion torque reduces the amount of micromotions between implant and bone. Therefore, the immediate loading may be considered a valid therapeutic choice, even in low-density bone, as long as at least 45 N/cm of insertion torque is reached. Copyright © 2013 by Mutaz B. Habal, MD.
AB - Between implants and peri-implant bone, there should be a minimum gap, without micromotions over a threshold, which could cause resorption and fibrosis. The higher the implant insertion torque, the higher will be the initial stability. The aim was to evaluate in vitro the correlation between micromotions and insertion torque of implants in bone of different densities. The test was performed on bovine bone of hard, medium, and soft density: 150 implants were used, 10 for each torque (20, 35, 45, 70, and 100 N/cm). Samples were fixed on a loading device. On each sample, we applied a 25-N horizontal force. Insertion torque and micromotions are statistically correlated. In soft bone with an insertion force of 20 and 35 N/cm, the micromotion resulted significantly over the risk threshold, which was not found with an insertion force of 45 and 70 N/cm and in hard and medium bones with any insertion torque. The increase in insertion torque reduces the amount of micromotions between implant and bone. Therefore, the immediate loading may be considered a valid therapeutic choice, even in low-density bone, as long as at least 45 N/cm of insertion torque is reached. Copyright © 2013 by Mutaz B. Habal, MD.
KW - Animals
KW - Biomechanical Phenomena
KW - Bone Density
KW - Bone density
KW - Cattle
KW - Dental Implantation, Endosseous
KW - Dental Implants
KW - Dental Prosthesis Design
KW - Dental Prosthesis Retention
KW - Dental Stress Analysis
KW - Immediate loading
KW - Insertion torque
KW - Materials Testing
KW - Micromovements
KW - Otorhinolaryngology2734 Pathology and Forensic Medicine
KW - Primary stability
KW - Stress, Mechanical
KW - Surgery
KW - Torque
KW - Animals
KW - Biomechanical Phenomena
KW - Bone Density
KW - Bone density
KW - Cattle
KW - Dental Implantation, Endosseous
KW - Dental Implants
KW - Dental Prosthesis Design
KW - Dental Prosthesis Retention
KW - Dental Stress Analysis
KW - Immediate loading
KW - Insertion torque
KW - Materials Testing
KW - Micromovements
KW - Otorhinolaryngology2734 Pathology and Forensic Medicine
KW - Primary stability
KW - Stress, Mechanical
KW - Surgery
KW - Torque
UR - http://hdl.handle.net/10807/122172
U2 - 10.1097/SCS.0b013e31827c9e01
DO - 10.1097/SCS.0b013e31827c9e01
M3 - Article
SN - 1049-2275
VL - 24
SP - 841
EP - 844
JO - THE JOURNAL OF CRANIOFACIAL SURGERY
JF - THE JOURNAL OF CRANIOFACIAL SURGERY
ER -