Effect of Implant-Abutment Connection Design on Load Bearing Capacity and Failure Mode of Implants

Abstract

Implant-abutment connection design has a significant influence on load bearing capacity and failure mode of implants; however, all implant-abutment connection designs tested would be expected to withstand clinically relevant forces.

Effects of the Implant Design on Peri‐Implant Bone Stress and Abutment Micromovement: Three‐Dimensional Finite Element Analysis of Original Computer‐Aided Design Models

“…Depending on the solidity of a food, the average bite force ranges from 20 to 120 N 26 . In the present study, a static load of 100 N is applied to simulate an occlusive load, in accordance with previous studies 27,28 .…”

Survival and Complication Rates of Fixed Restorations Supported by Locking‐Taper Implants: A Prospective Study with 1 to 10 Years of Follow‐Up

“…Finally, a systematic review on single‐tooth implant restorations reported a 5‐year cumulative incidence of abutment screw loosening of 8.8% . Butt‐joints or slip‐fit joints, indexed external or internal, are still the most widely used connection types in dental implants . Although implants featuring an external hexagon are still widespread in the market, this connection is considered slightly unstable, as a result of horizontal and rotational misfits under loading .…”

“…A butt joint only stabilizes the connection between the abutment and the implant fixture by the axial preload of the abutment screw. Occlusal force to the connection is concentrated at the abutment screw; thus, the optimum preload is critical for joint stability . In fact, stability of screw‐type connections is challenged by forces exceeding that of the torqued implant‐abutment system: if occlusal loads exceed the preload, the screw can loosen or break .…”

“…Occlusal force to the connection is concentrated at the abutment screw; thus, the optimum preload is critical for joint stability . In fact, stability of screw‐type connections is challenged by forces exceeding that of the torqued implant‐abutment system: if occlusal loads exceed the preload, the screw can loosen or break . In addition, lower masticatory forces, applied repeatedly, although they do not necessarily surpass the failure threshold of the assembly, may potentially lead to gradual loosening of the implant/abutment connection, as a result of fatigue .…”

Bone Microstrain Values of 1-Piece and 2-Piece Implants Subjected to Mechanical Loading

“…11,12 One of the critical elements influencing the long-term uncompromised functioning of a dental implant is its design. 21,22 Baggi et al 23 investigated the influence of implant diameter and length on stress distribution to calculate the overload risk in crestal bone around the implant neck. [16][17][18][19][20] The implant-abutment connection affects stress distribution in bone.…”