Influence of lateral-oblique cyclic loading on abutment screw loosening of internal and external hexagon implants
Source abstract
Abstract
To date, there is no evidence that internal anti-rotation configurations are better than external ones. The purpose of this study was to evaluate the effect of eccentric cyclic loading on abutment screw loosening in internal and external hexagon implants with either of these two screw materials, titanium (Ti) alloy versus gold alloy. The reverse torque value of the abutment screw was measured before (initial preload) and after loading (post-loading). The prepared assemblies were divided into four groups (A to D). Groups A and B used internal hex implants with gold alloy and Ti alloy abutment screws respectively. Groups C and D used external hex implants with gold alloy and Ti alloy abutment screws respectively. In all the groups, post-loading preload was significantly (p<0.05) higher than initial preload. Further, two-way ANOVA indicated that the implant-abutment connection did not have an effect, but the abutment screw material did. In particular, Ti abutment screws were less likely to come loose.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Dental Implant Techniques and Outcomes · Orthopaedic implants and arthroplasty · Orthopedic Surgery and Rehabilitation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Nihon University Graduate School of Dentistry
Department of Fixed Prosthodontics, Nihon University School of Dentistry
Implant Dentistry, Nihon University School of Dentistry Dental Hospital
References (41)
Show source-provided references
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