关键词: 牙科陶瓷, 氧化锆, 翼板粘接桥, 牙缺失

Abstract:

Objective A new restorative method for the restoration of one to two missing anterior teeth was explored using zirconia all-ceramic resin-bonded bridges fabricated through computer-aided design and computer-aided manufacturing(CAD/CAM). The short-term clinical performance of the bridges was evaluated. Methods Clinical data were collected, and inclusion, as well as exclusion, criteria were determined. A restoration plan was designed. Tooth preparation and laboratory production were performed. Try-in and bonding were conducted. The performance of the bridges was evaluated during follow-up. Results A total of five anterior zirconia all-ceramic resin-bonded bridges were fabricated through CAD/CAM. The bridges included two zirconia all-ceramic resin-bonded bridges with single-retainer design and three zirconia all-ceramic resin-bonded bridges with two-retainer design. The mean observation time was six months. During follow-up, no discoloration, fracture, loosening, and shedding were detected in the zirconia all-ceramic resin-bonded bridges. All abutments had good marginal integrity, and no marginal discoloration or secondary caries was observed. Five restorations were rated as A grade. Conclusion Zirconia all-ceramic resin-bonded bridges fabricated through CAD/CAM exhibited short-term good restoration effects for patients with one or two missing anterior teeth. However, whether the bonding strength of these bridges could meet the clinical requirement requires further investigation.

Key words: dental porcelain, zirconia, resin-bonded bridge, tooth loss