Restoration Design Effects on Implant-supported Crown Retention: An In Vitro Study of Removal Torque Loss after Cyclic Stress

This is the authors' abstract. We don't add key points for this paper.

Dental implants are widely recognized and a dependable method for rehabilitating edentulous patients, providing predictable long-term outcomes.1 Implant-supported restorations (ISRs) that are employed to rehabilitate single-tooth gaps have exhibited exceptional long-term survival rates.2,3 Nevertheless, ISRs are susceptible to biological and technical complications, despite their favorable results.The most prevalent technical issues associated with ISRs are screw fracture, framework fracture, veneering porcelain fracture, and screw loosening.4 Implant-supported prostheses can be either cement-retained (CR) or screw-retained (SR) to the implant fixtures, or a combination of both.5 The clinician's personal preference, as opposed to a scientific foundation, appears to be the primary factor in determining whether to use screw or cement retention.6 Despite the numerous benefits of either method, some inherent pitfalls and disadvantages could pose a detrimental effect on the long-term success of the entire prosthesis.7 A one-piece restoration including a customized abutment and crown is feasible.In comparison to the conventional fabrication method, single ISRs using the computer-aided design and computer-aided manufacturing (CAD-CAM) technique exhibit superior marginal integrity.8 Implant-supported crowns are frequently constructed from zirconia-reinforced lithium silicate