Since the introduction of dental implants by Brånemark in the 1970s, they have become a widely accepted solution for replacing missing teeth from the 1970s. However, despite their success, studies show that the failure rate of dental implants can vary from 1% to 19%. These failures are classified based on the timing of the abutment connection—early failures occur before functional loading, while late failures occur after occlusal loading or following the removal of the provisional restoration in cases of immediate implant loading. Several factors contribute to bone loss around implants, categorized into systemic, social, and local influences. Among the local factors, variables such as the implant body, implant dimensions, occlusal loading, and biological properties play important roles. Structural aspects, including the type of implant-abutment connection (external hex, internal hex, conical) and the micro gap size, are also associated with bone resorption. Key determinants of marginal bone loss include smoking habits, abutment height, and bone substratum, whereas mismatching distances show minimal effect. Notably, abutment height is crucial in preserving peri-implant bone in the initial stages. Furthermore, time efficiency in digital workflows for implant-supported crowns varies depending on the choice of material. These insights provide essential knowledge to increase the longevity and success of dental implant treatments.
