Evaluation of IPS-Empress Ⅱ ceramic crown:A 5-year clinical study / 实用口腔医学杂志

ABSTRACT

Objective: To evaluate the clinical performance of IPS-Empress Ⅱ ceramic crown in a five-year period.Methods:IPS-Empress Ⅱ ceramic crown was applied in 130 teeth treatment of 39 patients. The restorative cases include the single tooth missing, acquired tooth body defect, malformed teeth and discoloration caused by tetracycline, fluoride and the root canal treatment. The 130 teeth were investigated after luting in two weeks, 6, 12 to 60 months respectively. Modified Ryge criteria were used to assess the integrity of restoration, gingival health, color match, marginal adaptation, and sensitivity.Results:More than 96.2% restorations were found to be intact and had excellent marginal adaptation. Little wane existed in one crown at the incisal area. One crown fell with its post caused by failed post adhere. Due to the heavy occlusion force, one of the posterior bridge cracked. Obvious inflammation was found in 3 teeth and only two teeth suffered apicitis. No secondary caries and unsatisfactory color match were found in each follow-up examination. Conclusion:IPS-Empress Ⅱ ceramic crown and bridge is a reliable and ideal choice for the anterior aesthetic restoration.