IADR Abstract Archives
3-Year-Survival of CAD/CAM Resin-Based Composite Restorations in Severe Tooth-Wear Patients
Objectives: The aim of this prospective study was to assess the clinical performance of minimal-invasive CAD/CAM resin-based composite restorations in severe tooth-wear patients by evaluating their survival after 3-years.
Methods: Twenty-two patients with generalized severe tooth wear with functional and/or esthetic problems were included in the study. Following minimal-invasive preparation, CAD/CAM resin-based composite restorations (LAVA Ultimate, 3M) were adhesively luted (ESPE Sil, Scotchbond Universal, RelyX Ultimate, all 3M). Patients were recalled after one month, one year and three years. Failures were categorized as F1 (severe deficiencies resulting in replacement/extraction), F2 (localized deficiencies resulting in re-cementation/repair) and F3 (small chippings resulting in refurbishment/monitoring). Survival was evaluated using lifetables and Kaplan-Meier graphs, distinguishing between failure categories and tooth type (front teeth, premolars, molars).
Results: 568 indirect restorations in 21 patients (age 39.5±10.6y; 3 female/18 male) were evaluated for survival of restorations up to 3.5-years (one patient dropped out due to financial reasons). Until this time-point, a total of 42 failures were recorded (F1:4, F2:17, F3:21). Overall survival concerning F1 was 99.3%, for F1+F2 it was 96.0% and for F1+F2+F3 it was 91.5%. AFR’s were respectively 0.2%, 1.2% and 2.5%. Tooth type had an influence on survival probability, which was most distinct for F1+F2+F3: For front teeth survival was 98.8% (AFR=0.3%), for premolars it was 87.8% (AFR=3.6%) and for molars survival was 80.3% (AFR=6.1%).
Conclusions: Minimal-invasive CAD/CAM resin-based composite restorations showed a good clinical mid-term survival for restorative rehabilitation of severely worn dentitions. Restorations on molars and premolars showed a higher failure probability than those on front teeth.
Methods: Twenty-two patients with generalized severe tooth wear with functional and/or esthetic problems were included in the study. Following minimal-invasive preparation, CAD/CAM resin-based composite restorations (LAVA Ultimate, 3M) were adhesively luted (ESPE Sil, Scotchbond Universal, RelyX Ultimate, all 3M). Patients were recalled after one month, one year and three years. Failures were categorized as F1 (severe deficiencies resulting in replacement/extraction), F2 (localized deficiencies resulting in re-cementation/repair) and F3 (small chippings resulting in refurbishment/monitoring). Survival was evaluated using lifetables and Kaplan-Meier graphs, distinguishing between failure categories and tooth type (front teeth, premolars, molars).
Results: 568 indirect restorations in 21 patients (age 39.5±10.6y; 3 female/18 male) were evaluated for survival of restorations up to 3.5-years (one patient dropped out due to financial reasons). Until this time-point, a total of 42 failures were recorded (F1:4, F2:17, F3:21). Overall survival concerning F1 was 99.3%, for F1+F2 it was 96.0% and for F1+F2+F3 it was 91.5%. AFR’s were respectively 0.2%, 1.2% and 2.5%. Tooth type had an influence on survival probability, which was most distinct for F1+F2+F3: For front teeth survival was 98.8% (AFR=0.3%), for premolars it was 87.8% (AFR=3.6%) and for molars survival was 80.3% (AFR=6.1%).
Conclusions: Minimal-invasive CAD/CAM resin-based composite restorations showed a good clinical mid-term survival for restorative rehabilitation of severely worn dentitions. Restorations on molars and premolars showed a higher failure probability than those on front teeth.