Fabrication of a Monolithic Computer-Aided Design (CAD)/Computer-Aided Manufacturing (CAM) Zirconia Crown Adapted to the Clasp of an Existing Removable Partial Denture
Jun Takebe
TL;DR
A new dental technique uses a provisional restoration to guide the design of a zirconia crown that fits well with an existing denture clasp.
Contribution
A novel method for fabricating CAD/CAM zirconia crowns by using a provisional restoration adapted to a denture clasp.
Findings
The crown showed excellent clasp adaptation and stable periodontal tissues over four years.
Abutment teeth remained unaffected, and denture movement was minimized.
The provisional restoration effectively guided the definitive crown's design.
Abstract
This case report illustrates a technique for fabricating a monolithic computer-aided design (CAD)/computer-aided manufacturing (CAM) zirconia crown by reproducing the morphology of a provisional restoration that had been adapted to the clasp of an existing removable partial denture. A 69-year-old patient presented after endodontic treatment of the mandibular right first and second premolars, which served as abutments for a removable partial denture with a double Akers clasp. To achieve optimal clasp adaptation, occlusal contacts, marginal fit, a rest seat, a guide plane, and undercut areas were intentionally incorporated into the provisional restoration. Models of the abutment teeth, provisional restoration, and opposing dentition were fabricated. A definitive cast was scanned with a digital scanner, and the datasets were superimposed to design and fabricate a monolithic zirconia crown.…
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Taxonomy
TopicsDental materials and restorations · Dental Research and COVID-19 · Dental Implant Techniques and Outcomes