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- Title
A new design for all-ceramic inlay-retained fixed partial dentures: A report of 2 cases.
- Authors
Wolfartt, Stefan; Kern, Mafthias
- Abstract
In a previous clinical study, all-ceramic resin-bonded 3-unit inlay-retained fixed partial dentures (IRFPDs) had a significantly worse outcome in the posterior region than did crown- retained 3-unit FPDs made from the same material. Debonding or fractures were causes of failure. To improve the clinical outcome of IRFPDs, a new framework design was developed: (1) The inlay retainers were made out of CAD/CAM-manufactured zirconia ceramic to improve fracture resistance, and additional veneering of the inlays was omitted. (2) The inlay retainers were completed with a shallow occlusal inlay (1-mm minimum thickness) and an oral retainer wing (0.6-mm minimum thickness). The wings were designed to reduce stress on the inlay retainer caused by torsion forces when the FPD is loaded non-axially and to increase the enamel adhesive surface area. The pontic was circumferentially veneered with feldspathic porcelain. The clinical and laboratory procedures of this new treatment modality are described, and 2 exemplary clinical cases are presented. This new preparation and framework design might improve the clinical outcome of all-ceramic resin-bonded IRFPDs. However, adequate evidence of long-term safety and efficacy is required before this new design can be recommended for general clinical practice.
- Subjects
DENTAL ceramics; INLAYS (Dentistry); BRIDGES (Dentistry); DENTAL adhesives; CAD/CAM systems; ZIRCONIUM oxide
- Publication
Quintessence International, 2006, Vol 37, Issue 1, p27
- ISSN
0033-6572
- Publication type
Case Study