Five-year clinical outcome of posterior zirconia ceramic inlay-retained FDPs with a modified design

• Published in: Journal of dentistry Vol. 43; no. 12; pp. 1411 - 1415
• Main Authors: Chaar, M. Sad, Kern, Matthias
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.12.2015; Elsevier Limited
• Subjects: Adhesive bonding; Adult; Ceramics; Clinical trial; Debonding; Dental Abutments; Dental Materials - chemistry; Dental Porcelain; Dental Prosthesis - methods; Dental Prosthesis Design; Dental Restoration Failure; Dental Veneers; Dentistry; Denture, Partial, Fixed; Design analysis; Design modifications; Enamel; Female; Humans; Inlay-retained FDPs; Inlays; Male; Minimal invasive preparation; Patients; Resin Cements; Retainers; Single missing tooth; Survival; Teeth; Treatment Outcome; Zirconia ceramic; Zirconium; Zirconium dioxide; Hamburg Germany; Clinical trial; Single missing tooth; Minimal invasive preparation; Inlay-retained FDPs; Zirconia ceramic
• ISSN: 0300-5712; 1879-176X
• DOI: 10.1016/j.jdent.2015.11.001

Abstract Objectives To evaluate the 5-year clinical outcome of posterior inlay-retained fixed dental prostheses (IRFDPs) with a modified design made from zirconia ceramic (Vita In-Ceram YZ, Vita Zahnfabrik, Bad Säckingen, Germany). Methods Thirty 3-unit IRFDPs were placed in 30 patients. Seven IRFDPs replaced the second premolars (4 in the maxilla, 3 in the mandible), and 23 replaced the first molars (15 in the maxilla, 8 in the mandible). Preparations were performed in accordance with general principles for ceramic inlay restorations and modified with a short retainer-wing bevel preparation within the enamel at the buccal and oral sides. The frameworks were milled from zirconia ceramic, and the pontics were veneered with feldspathic ceramic. After air-abrasion of bonding surfaces, IRFDPs were bonded with an adhesive composite resin. The patients were recalled 6–12 months after placement, and then annually. Kaplan–Meier analysis was used to calculate the survival and complication rates of the IRFDPs. Results After a mean observation time of 64.4 (SD = 17.6) months (min 15, max 95.6), the 5-year cumulative survival of IRFDPs was 95.8%. Debonding was reported for two IRFDPs (6.9%), one of them failed finally after 49.4 months due to repeated debonding. Chipping of the veneering ceramic was reported in three cases (10.5%). Secondary caries were reported in 2 patients (8.1%). Nevertheless, the latter complications did not affect the clinical function of the involved IRFDPs. Conclusion The 5-year clinical outcome of zirconia-based IRFDPs fabricated in the modified design is encouraging, so that they may represent a treatment alternative to replace posterior single missing teeth, taking into consideration the appropriate case selection.