Multi-Unit Abutment (MUA)
Multi-Unit Abutments are precision components fitted on top of dental implants to create a common, level platform for screw-retained bridges—especially in full-arch concepts like All-on-4®/All-on-6. MUAs correct implant angulation, protect the implant–tissue interface and enable accurate, repeatable prosthetic connections for long-term stability.
Platform Correction
Straight (0°) and angled (e.g., 17°/30°) MUAs align divergent implants to a common path of insertion.
Screw-Retained Reliability
Facilitates retrievable bridges (no cement) for easier maintenance and predictable hygiene.
Tissue Protection
Creates a stable transmucosal pathway, helping preserve soft tissues and minimise micro-movement at the implant crest.
Prosthetic Versatility
Multiple collar heights for different gum thicknesses; compatible with provisional and definitive frameworks.
When Are MUAs Indicated?
- Full-arch immediate loading (All-on-4®/All-on-6) in upper or lower jaws
- Implants with different angulations requiring a parallelised prosthetic platform
- Thin or thick soft tissues where collar height selection is critical
- Cases prioritising screw retention and retrievability over cemented solutions
Clinical Workflow
- Planning: CBCT and digital smile design determine implant positions and MUA angulation/collar height.
- Surgery: Implants placed; MUAs selected chairside for best emergence and prosthetic access.
- Immediate Provisional: In full-arch cases, a screw-retained provisional bridge is often fitted same/next day.
- Definitive Bridge: After healing, a CAD/CAM titanium or Cr-Co framework with ceramic/composite layering is delivered.
Maintenance & Aftercare
Daily hygiene around the MUA sites is essential—use super-floss/interdental brushes and water flossers as advised. Periodic professional cleaning and screw torque checks maintain stability. Because restorations are screw-retained, they can be removed and serviced without damaging the framework or implants.
Screw-Retained vs. Cement-Retained
MUAs allow us to avoid excess cement—a known risk for peri-implant inflammation—while providing precise fit and easy retrieval. Access holes are discreetly positioned and sealed with aesthetic materials after torqueing to manufacturer specifications.