IADR Abstract Archives
Five-year Clinical Evaluation of Lithium Disilicate CAD/CAM Fixed Partial Dentures
Objectives: Evaluate the clinical performance of chairside monolithic lithium disilicate CAD/CAM fixed partial dentures (LDS-FPDs) after five years of clinical service.
Methods: Thirty IPS e.maxCAD FPDs (Ivoclar/Vivadent) were prepared and fabricated following manufacturer instructions. Seventeen posterior LDS-FPDs (first molar as the most distal abutment) and 13 anterior LDS-FPDs were included in the study. CEREC OmniCam (Dentsply/Sirona) 4.3 SW was used to design full-contour monolithic lithium disilicate FPDs with connector sizes >15 mm2. Each LDS-FPD was milled from the digital file using a MCX mill (Dentsply/Sirona). Restorations were crystallized and glaze-fired under vacuum in a Programat CS2 furnace (Ivoclar/Vivadent). Interim FPDs were milled in TelioCAD and cemented with Telio Desensitizer/CS C&B and TelioLink (Ivoclar/Vivadent). At a second appointment, the LDS-FPDs were fitted, internal surfaces etched with 4.9% HF for 20 seconds and silanated, and cemented using dual-cured resin cement (MultiLink Primer A&B and MultiLink, Ivoclar/Vivadent).
Results: Mild sensitivity was reported on 20% of the LDS-FPDs at 1 week and on 7% at 2 and 3 weeks. All sensitivity resolved by 4 weeks. Two independent examiners evaluated the LDS-FPDs at baseline, 6 months, 1, 2, 3 and 5 years using modified USPHS criteria. Three patients were lost to follow-up. There was no difference in the gingival/plaque indexes between test and control teeth for any recall interval. The percent alpha scores were 100% for color match, margin discoloration, margin adaptation and surface finish at 5-years. One LDS-FPD failed at 2 years due to recurrent decay. One LDS-FPD failed at 4 years due to internal resorption of an abutment tooth. One LDS-FPD presented repairable recurrent decay at 5 years. Complete five-year survival data will be presented at the meeting.
Conclusions: Chairside monolithic LDS-FPDs had clinically acceptable post-operative sensitivity with excellent clinical performance at 5-years. This study was supported by a grant from Ivoclar/Vivadent.
Methods: Thirty IPS e.maxCAD FPDs (Ivoclar/Vivadent) were prepared and fabricated following manufacturer instructions. Seventeen posterior LDS-FPDs (first molar as the most distal abutment) and 13 anterior LDS-FPDs were included in the study. CEREC OmniCam (Dentsply/Sirona) 4.3 SW was used to design full-contour monolithic lithium disilicate FPDs with connector sizes >15 mm2. Each LDS-FPD was milled from the digital file using a MCX mill (Dentsply/Sirona). Restorations were crystallized and glaze-fired under vacuum in a Programat CS2 furnace (Ivoclar/Vivadent). Interim FPDs were milled in TelioCAD and cemented with Telio Desensitizer/CS C&B and TelioLink (Ivoclar/Vivadent). At a second appointment, the LDS-FPDs were fitted, internal surfaces etched with 4.9% HF for 20 seconds and silanated, and cemented using dual-cured resin cement (MultiLink Primer A&B and MultiLink, Ivoclar/Vivadent).
Results: Mild sensitivity was reported on 20% of the LDS-FPDs at 1 week and on 7% at 2 and 3 weeks. All sensitivity resolved by 4 weeks. Two independent examiners evaluated the LDS-FPDs at baseline, 6 months, 1, 2, 3 and 5 years using modified USPHS criteria. Three patients were lost to follow-up. There was no difference in the gingival/plaque indexes between test and control teeth for any recall interval. The percent alpha scores were 100% for color match, margin discoloration, margin adaptation and surface finish at 5-years. One LDS-FPD failed at 2 years due to recurrent decay. One LDS-FPD failed at 4 years due to internal resorption of an abutment tooth. One LDS-FPD presented repairable recurrent decay at 5 years. Complete five-year survival data will be presented at the meeting.
Conclusions: Chairside monolithic LDS-FPDs had clinically acceptable post-operative sensitivity with excellent clinical performance at 5-years. This study was supported by a grant from Ivoclar/Vivadent.