IMPLANT ABUTMENTS : FROM BASICS TO ADVANCED

This document provides a comprehensive and clinically oriented overview of implant abutments in implant dentistry, focusing on their selection, design, biomechanics, and role in long-term success of implant-supported prosthesis. It covers the fundamental concepts of implant–abutment interface, including anatomical segments, functional design, and classification of abutments. Detailed explanations of external and internal connections, including Morse taper systems, are discussed with emphasis on mechanical stability, microgap, and screw loosening. The document highlights key clinical factors such as platform switching, emergence profile, abutment height, and bone preservation strategies, supported by recent evidence. Various abutment materials (titanium, zirconia, and hybrid) are compared based on mechanical properties, esthetics, and biological response. Additionally, it includes stock vs custom abutments, CAD-CAM fabrication techniques, and modern digital workflows, along with specialized abutments like multi-unit and overdenture abutments. This resource is ideal for prosthodontic postgraduate students, dental clinicians, and exam preparation, offering a structured and evidence-based understanding of abutments for both academic and clinical application.