A Screw-Retained Implant Bridge is a fixed dental restoration anchored to dental implants via retaining screws, widely preferred for edentulous or partially edentulous patients in prosthodontics.
Its core structure consists of three components: dental implants (osseointegrated with the jawbone for stability), a custom - made prosthetic bridge (restoring chewing function and aesthetics), and titanium or zirconia screws (securing the bridge to implant abutments). Unlike cement - retained alternatives, it offers superior retrievability: dentists can easily remove the bridge for implant maintenance, cleaning, or repair without damaging the restoration or surrounding tissues.
Clinically, it excels in stability and long - term durability, making it ideal for posterior regions with high masticatory stress. However, it has limitations: screw access holes may compromise anterior aesthetics, and improper torque control during placement can cause screw loosening or fracture.
Precision in fabrication is critical: digital impressions (e.g., intraoral scanners) ensure accurate fit, while biocompatible materials (zirconia, lithium disilicate) enhance patient comfort and reduce irritation risks. Post - placement care, including regular screw torque checks and oral hygiene guidance, is essential to extend the restoration's lifespan (typically 10–15 years with proper maintenance).