Reviews
Factors Influencing Prosthodontic
Complications in Metal Acrylic Resin
Full Arch Implant-supported Fixed
Prostheses: A Narrative Review
ZE01-ZE06
Correspondence
Sweta Teotia,
Department of Prosthodontics and Crown and Bridge, Subharti Dental College
and Hospital, Swami Vivekanand Subharti University, Meerut-250005,
Uttar Pradesh, India.
E-mail: teotiasweta2900@gmail.com
Fixed full-arch implant-supported metal-acrylic resin prostheses are a well-established solution to rehabilitate fully edentulous patients due to their retrievability/repairability, versatility and cost. However, the prosthesis and biomechanical complications can significantly impact the long-term performance of the prosthesis. The objective of this narrative review was to identify key biomechanical and prosthetic factors that influence the complication rates and clinical outcomes for fixed full-arch metal-acrylic resin implant-supported prostheses. Prosthodontic-related complications occurred from multifactorial sources; identified factors that influence prosthodontic complications included the number and distribution of implants; cantilever length; anteroposterior spread; type of material used to manufacture framework; how metal and acrylic are bonded; occlusal design; and parafunctional habits. Long-term success of fixed full-arch implant-supported metal-acrylic resin prostheses are dependent upon the following biomechanically favourable conditions: implant distribution and number, controlled cantilever length, accurate fit of framework, strong metal-acrylic bond, appropriate occlusal schemes and regular maintenance protocols. Additionally, the use of digital workflow methods, Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM) frameworks and new high-performing polymer materials may improve both the fit and stress distribution in the prosthesis, but there is still a lack of strong long-term clinical evidence to support these claims.