Evaluation clinical long-term curative effect and analysis of its influence factors after restoration of teeth with wedge-shaped defects
Li, P.; Zhang, Q.; Wang, J.
Zhonghua Kou Qiang Yi Xue Za Zhi 36(6): 437-439
2001
ISSN/ISBN: 1002-0098 PMID: 11930719 Document Number: 531165
To evaluate the long-term curative effect clinically and analysis of its influence factors after restoration of teeth with wedge-shaped defects. Seventy five cases of 509 teeth with various degrees of dental wedge-shaped defects were randomly divided into two groups--the group restored by Dyract Cement and the group restored by 3M-Vitremer. Evaluation was made with the modified USPHS evaluation criterion after restoration for 1,2,4 years respectively. The successful rate dropped down from 2 year successful rate 85.5% to 4-year 27.7%. The new wedge-shaped defects were presented at the cervical margin of the original restoration in 1.8% (2 years later) and 6.6% (4 years later). There were a lot of influence factors on long-term curative effect. The failure rate in the group with occlusal interference was significantly higher than that without occlusal interference. The clinical successful rates are affected by the value of occlusal force on the restored teeth and the physical properties of the restorative materials. It is suggested that the process of restoration of dental wedge-shaped defect should include obviating occlusal factors as well as to improve the properties of restorative materials.