Technique for cementing screwmentable implant crowns to prevent misalignment

Area of Science:

• Dental Implantology
• Prosthodontics
• Biomaterials

Background:

• Accurate cementation of implant-supported crowns is crucial for functional and esthetic outcomes.
• Misalignment during extraoral cementation can lead to costly chairside adjustments and compromised restorations.
• Current techniques may lack precision in maintaining the desired crown-to-abutment relationship during the cementation process.

Purpose of the Study:

• To describe an innovative technique for the accurate extraoral cementation of implant crowns onto abutments.
• To present a method that utilizes a custom fabrication aid to ensure precise crown alignment.
• To minimize potential misalignment issues that can affect the final fit and occlusion of implant-retained prostheses.

Main Methods:

• Fabrication of a cementation verification aid using polyvinylsiloxane bite registration material (Blu Mousse).
• Extraoral cementation of the implant crown onto the abutment using the fabricated aid.
• Intraoral delivery and verification of the cemented prosthesis, assessing occlusal and interproximal contacts.

Main Results:

• The described technique successfully achieved accurate cementation of the implant crown onto the abutment extraorally.
• The use of the polyvinylsiloxane aid ensured proper alignment, resulting in no required adjustments to occlusal or interproximal contacts upon delivery.
• The method demonstrated increased accuracy in placing the crown on the abutment for screw-retained (implant) crowns.

Conclusions:

• This technique offers a reliable method for achieving accurate extraoral cementation of implant crowns.
• The use of a polyvinylsiloxane cementation verification aid is effective in preventing misalignment and ensuring precise fit.
• This approach can improve efficiency and predictability in the final delivery of implant-supported prostheses.