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Volume 26 , Issue 2
March/April 2013

Pages 175–180

Survival Rates of a Lithium Disilicate–Based Core Ceramic for Three-Unit Esthetic Fixed Partial Dentures: A 10-Year Prospective Study

M. Fernanda Solá-Ruiz, DDS, PhD, MD/Elena Lagos-Flores, DDS/Juan Luis Román-Rodriguez, DDS, PhD/Jaime Del Rio Highsmith, DDS, PhD, MD/Antonio Fons-Font, DDS, PhD, MD/Maria Granell-Ruiz, DDS, PhD

PMID: 23476914
DOI: 10.11607/ijp.3045

Purpose: The aim of this prospective study was to evaluate the clinical efficacy and long-term survival rate of three-unit fixed partial dentures (FPDs) made from lithium disilicate–based core ceramic. Materials and Methods: Twenty-one threeunit FPDs were placed in 19 patients to replace single lost teeth in the esthetic area, following a study protocol that took clinical, esthetic, and radiologic aspects into consideration. Each case was reviewed at 1 week following placement, at 6 months, and then annually for 10 years. Statistical analysis was performed using Kaplan- Meier survival analysis. Results: Out of the 19 patients, 14.3% presented reversible postoperative sensitivity. Recession was observed in 24% of dental posts, and 7.1% presented marginal discoloration. Treatment did not increase either Bleeding or Plaque Index scores at prepared teeth; secondary caries did not appear either. The restorations’ survival rate at the 10-year follow-up was 71.4%; six FPDs had fractured and one debonded. Conclusions: Fracture failure rate was 28.6% after 10 years; a high percentage corresponded to connector fractures and occurred during the first 5 years. Lithium disilicate glass-ceramic FPDs present a higher risk of fracture than standard therapies (metal-ceramic) or other more recently developed ceramic materials. The prognosis for survival improves for Class I occlusion and nonparafunctional patients. Int J Prosthodont 2013;26:175–180. doi: 10.11607/ijp.3045

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