An implant screw-retained crown is a widely used dental restoration for single-tooth implant rehabilitation, distinguished from cement-retained crowns by its mechanical fixation via a titanium or gold screw, making it a staple in modern implant dentistry.
Core Components & Structure
It consists of four critical parts: dental implant (titanium alloy fixture embedded in alveolar bone for osseointegration), abutment (connects implant to crown, with customizable height/angle for occlusal alignment), retention screw (secures crown to abutment, available in different torques), and restorative crown (porcelain-fused-to-metal or all-ceramic, matching natural tooth shade and morphology). The screw passes through a small access hole in the crown (usually on the occlusal or palatal surface), ensuring stable anchorage.
Key Advantages
Unlike cement-retained alternatives, it allows non-destructive removal for implant inspection, abutment adjustment, or repair, avoiding cement residue-induced peri-implantitis. It provides precise occlusal control and reduces crown displacement risk, making it ideal for patients with deep bite or limited interocclusal space. Additionally, its retrievable design simplifies maintenance for long-term implant longevity.
Clinical Considerations
Screw loosening is a primary complication, so clinicians must apply calibrated torque (typically 30–35 Ncm) during placement. The access hole requires a composite resin seal to prevent food impaction and bacterial intrusion. Patients need strict oral hygiene to clean the screw-crown interface, and regular follow-ups (every 6 months) to check screw stability and peri-implant tissue health.