A 5-year retrospective study of survival of zirconia single crowns fitted in a private clinical setting

作者：Ortorp Anders^*; Kihl Maria Lind; Carlsson Gunnar E

来源：Journal of Dentistry, 2012, 40(6): 527-530.

DOI：10.1016/j.jdent.2012.02.011

• All-ceramic crown
• Complications
• Crown design
• CAD/CAM
• General dental practice

Objectives: The aim of this report was to evaluate the 5-year clinical performance and survival of zirconia (NobelProcera (TM)) single crowns. %26lt;br%26gt;Methods: All patients treated with porcelain-veneered zirconia single crowns in a private practice during the period October 2004 to November 2005 were included. The records were scrutinized for clinical data. Information was available for 162 patients and 205 crowns. %26lt;br%26gt;Results: Most crowns (78%) were placed on premolars and molars. Out of the 143 crowns that were followed for 5 years, 126 (88%) did not have any complications. Of those with complications, the most common were: extraction of abutment tooth (7; 3%), loss of retention (15; 7%), need of endodontic treatment (9; 4%) and porcelain veneer fracture (6; 3%). No zirconia cores fractured. In total 19 restorations (9%) were recorded as failures: abutment tooth extraction (7), remake of crown due to lost retention (6), veneer fracture (4), persistent pain (1) and caries (1). The 5-year cumulative survival rate (CSR) was 88.8%. %26lt;br%26gt;Conclusions: According to the present 5-year results zirconia crowns (NobelProcera (TM)) are a promising prosthodontic alternative also in the premolar and molar regions. Out of the 143 crowns followed for 5 years, 126 (88%) did not have any complications. However, 9% of the restorations were judged as failures. Further studies are necessary to evaluate the long-term success.

• 出版日期2012-6