Fixed prosthodontics is the specialized branch of dentistry concerned with replacing and restoring teeth using prostheses that are permanently cemented, bonded, or implant-retained — restorations the patient cannot remove.
Unlike removable dentures, fixed prostheses function as integrated components of the dentition, distributing occlusal forces through natural tooth roots or osseointegrated implant fixtures. This permanence shapes every stage of care, from treatment planning and tooth preparation to material selection and long-term maintenance.
Types of Fixed Prostheses
Fixed prosthodontics encompasses a broad range of restorations, including:
- Crowns: Full-coverage restorations that cap a damaged, heavily restored, or endodontically treated tooth to rebuild its form and function.
- Fixed partial dentures (bridges): Multi-unit restorations that replace one or more missing teeth by spanning a gap, supported by adjacent abutment teeth or dental implants.
- Veneers: Thin porcelain or composite laminates bonded to the facial surface of anterior teeth to correct esthetics or protect compromised enamel.
- Inlays and onlays: Conservative indirect restorations that preserve more natural tooth structure than a full crown while restoring posterior occlusal surfaces.
- Implant-supported prostheses: Crowns or bridges anchored to osseointegrated implants, eliminating the need to prepare adjacent teeth as abutments.
Clinical Significance
Properly planned fixed prosthodontic treatment restores masticatory function, maintains arch integrity, and prevents the supraeruption and drifting that follow tooth loss. Material selection — among options such as zirconia, lithium disilicate, and porcelain-fused-to-metal — is guided by esthetic demands, occlusal load, and tooth position in the arch.
Treatment success depends on the health of supporting structures. A thorough periodontal evaluation confirms that abutment teeth and surrounding tissues can sustain the mechanical demands placed on the restoration. Marginal fit is equally critical: open or overcontoured margins invite plaque accumulation, secondary caries, and periodontal breakdown over time.
Occlusal design must harmonize with the patient’s existing bite to prevent premature contacts, bruxism-related fractures, and temporomandibular strain. Advances in digital dentistry — including CAD/CAM milling and intraoral scanning — have improved precision and workflow efficiency, making same-day restorations increasingly viable.
When treatment is grounded in sound periodontal health, precise execution, and consistent maintenance, fixed restorations can reliably function for decades.