| 0230 Long-term behavior of Zirconia-based bridges: Three years results | ||
|
P. POSPIECH, and F.P. NOTHDURFT, Saarland University, Homburg, Germany Using CAD/CAM-processing high-strength Zirconia ceramics can be used even for the fabrication of all-ceramic bridges. The strength of the materials allows the conventional cementation which simplifies the daily clinical life. Some in-vitro studies on three- and four-unit posterior bridges revealed that the strength is high enough to run controlled clinical studies. Objectives: The purpose of this prospective study was to observe the clinical performance of posterior bridges for the replacement of molars. Material and Methods: Since October 2000 a total of 35 bridges were placed. All abutment teeth were prepared for full crowns. A chamfer with a depth of maximum 1.2 mm was prepared in all cases. Impressions were made with the polyether materials Impregum Penta/Permadyne. The axial wall-thicknesses of the zirconia-cores were constant 0.6 mm, the connector area was designed with a cross-sectional plane of minimum 9 mm2. The bridge frameworks were veneered with the newly developed overlay porcelain LAVA Ceram. All restorations were cemented conventionally with the glass-ionomer cement Ketac Cem. Recalls took place in December 2003 after an observation time of three years. 30 bridges could be evaluated at that time. Judgements were made on the fit of the bridges on the abutments, discoloration of the marginal gingiva, the quality of the surface, failures and allergenic reactions. Results: All bridges were only inserted with a perfect marginal fit. No changes in fit or secondary caries were observed. No total failures happened, in one case a small chipping of the veneering material took place. No allergenic reactions and negative influences on the marginal gingiva could be observed. Conclusion: After three years of clinical service one can conclude a high performance of Zirconia based posterior bridges. This study was supported by 3M Espe, Seefeld, Germany. | ||
| Seq #23 - Dental Materials: Tooth Colored Restaurations: Clinical Trials 11:30 AM-1:00 PM, Friday, 27 August 2004 Crowne Plaza Hotel SEDEF III | ||
|
Back to the Scientific Program Program
| ||