Abstract
ObjectivesTo evaluate the clinical performance of partial glass-ceramic (IPS e.max Press) posterior restorations.Materials and methodsA total of 765 restorations in 158 patients were placed between 2008 and 2018 and evaluated in a prospective study during regular dental care visits between 2015 and 2018. The restorations were luted with a conventional photo-polymerized resin composite (HFO) in conjunction with an Immediate Dentin Sealing procedure (IDS). Intra-oral photographs and radiographs were made and evaluated using USPHS criteria.ResultsThe mean observation time was 53.3 months (range 3–113 months). Three absolute failures occurred (tooth fractures, n = 2; apical re-infection, n = 1) all leading to the loss of the restored tooth. Repairable and salvageable failures occurred in 9 teeth (endodontic complications, n = 7; secondary caries, n = 1; debonding, n = 1). The survival and success rates according to Kaplan-Meier after 5 years cumulated to 99.6% and 98.6%, respectively. Location (premolar/molar and mandibula/maxilla), pre-restorative endodontic status (vital/devitalised) and extension of the indirect ceramic restoration (number of sides and cusps involved) did not significantly affect the cumulative success rate (log rank test, p > 0.05). The condition of the vast majority of the restorations remained unaffected for 5 years.ConclusionsPartial glass-ceramic posterior restorations (pressed lithium disilicate (IPS e.max press, Ivoclar Vivadent) luted by means of a conventional photo-polymerized resin composite in conjunction with the use of an IDS procedure have an excellent medium-term prognosis.Clinical relevancePartial glass-ceramic posterior restorations can be considered as a highly reliable treatment option. Location and extension of the restoration and pre-restorative endodontic status do not affect success rate.
Highlights
Partial indirect restorations can be indicated when it is difficult to restore form and function using direct composite restorations
The aim of this study is to evaluate the clinical survival and success rate of partial glass-ceramic posterior restorations luted with conventional photo-polymerized resin composite in conjunction with the use of immediate dentin sealing concept (IDS)
The extension of the indirect ceramic restoration could not be determined from the photograph made at baseline, nor from the patients’ record
Summary
Partial indirect restorations can be indicated when it is difficult to restore form and function using direct composite restorations. Clin Oral Invest (2021) 25:1463–1473 toughness from the crystallites as these induce the fracture to bow, deflect and branch [2] Besides their strength, adhesive luting is possible and this increases strength and regain aesthetics at a minimum biological price, removing defect structures only [3,4,5]. Comparing acid-etched e.max lithium disilicate monolithic and bilayered complete coverage restorations resulted in an estimated cumulative survival rate of 96.5% after 10.4 years for monolithic and 100% after 7.9 years for bilayered restorations. This difference was statistically significant [10]. Long-term data with a high number of these partial all-ceramic restorations is limited, which precludes firm statements regarding their effectiveness [11]
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