Abstract :
A pier abutment located between two edentulous spaces presents unique biomechanical challenges during fixed prosthodontic rehabilitation. Rigid connectors in such cases may generate fulcrum effects, leading to debonding or long-term prosthesis failure. This case report highlights the prosthetic rehabilitation of a 32-year-old female patient with missing lower left teeth (35 and 37), using a five-unit metal-ceramic fixed dental prosthesis incorporating a digitally designed non-rigid connector. Tooth 36 served as the pier abutment. A precision-milled tenon-mortise connector was employed to reduce stress transmission and enhance prosthesis longevity. Therefore, this case underscores the importance of incorporating non-rigid connectors in pier abutment situations to mitigate fulcrum-induced stresses and preserve prosthesis stability. The integration of digital design and precision milling enhanced the accuracy of connector adaptation and ensured predictable biomechanical behavior. Within the limitations of a single case, the clinical outcome demonstrates that digitally fabricated non-rigid connectors can serve as a reliable alternative to conventional designs, offering improved longevity and patient comfort.
Keyword :
Pier abutment, Non-rigid connector, Digital prosthodontics, Key-keyway, Stress breaker, Fixed partial denture.