Removable partial dentures retained by hybrid CAD/CAM cobalt-chrome double crowns

• Verfasst von: Herpel, Christopher [VerfasserIn]
• Verfasst von: Springer, Antonia [VerfasserIn]
• Verfasst von: Pushkin, Galmunkh [VerfasserIn]
• Verfasst von: Zimmermann, Lukas [VerfasserIn]
• Verfasst von: Stober, Thomas [VerfasserIn]
• Verfasst von: Rammelsberg, Peter [VerfasserIn]
• Verfasst von: Schwindling, Franz Sebastian [VerfasserIn]
• Titel: Removable partial dentures retained by hybrid CAD/CAM cobalt-chrome double crowns
• Titelzusatz: 1-year results from a prospective clinical study: CAD/CAM cobalt-chrome double crowns: 1-year results
• Verf.angabe: Christopher Herpel, Antonia Springer, Galmunkh Puschkin, Lukas Zimmermann, Thomas Stober, Peter Rammelsberg, Franz Sebastian Schwindling
• E-Jahr: 2021
• Jahr: 20 October 2021
• Umfang: 5 S.
• Fussnoten: Gesehen am 17.02.2022
• Titel Quelle: Enthalten in: Journal of dentistry
• Ort Quelle: Amsterdam [u.a.] : Elsevier Science, 1972
• Jahr Quelle: 2021
• Band/Heft Quelle: 115(2021), Artikel-ID 103847, Seite 1-5
• ISSN Quelle: 1879-176X
• DOI: doi:10.1016/j.jdent.2021.103847
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: CAD/CAM
• Sach-SW: Cobalt-chrome
• Sach-SW: Cobalt-chromium
• Sach-SW: Digital dentistry
• Sach-SW: Double crown
• Sach-SW: Removable dental prosthesis
• Sach-SW: Removable partial denture
• K10plus-PPN: 1789987636

Abstract

Objectives - Computer-aided design and manufacturing (CAD/CAM) has been successfully used to replace conventional steps in the fabrication of double crowns, creating hybrid-workflows that might facilitate the wider application of these restorations in the future. However, in-vivo data are still lacking. - Methods - A prospective clinical trial was designed in which 20 patients (median age = 69 years; n women = 10) with 73 abutment teeth who needed a double-crown-retained removable partial denture (RPD) were consecutively recruited. While most of the work steps were done conventionally, gypsum models were digitized with a laboratory scanner to allow CAD/CAM fabrication of primary crowns and secondary structures. DentalDesigner software (3Shape) was used in combination with milling unit PrograMillPM7 and Co-Cr- blanks (Ivoclar-vivadent). Connectors were milled from wax, transferred to Co-Cr using lost-wax technique and bonded to the secondary crowns. Clinical follow-ups were scheduled 6 and 12 months after prosthesis insertion. Outcome parameters were complication-free survival of RPDs and abutment teeth after one year. - Results - After 12 months, complication-free survival was 74% and 91% for the RPDs and abutment teeth, respectively. Complications comprised decementations (n = 5), abutment tooth fractures (n = 2), fracture of denture teeth (n = 1), and loss of abutment teeth (n = 1). These complications were easily manageable, resulting in 1-year survival of 100% for CAD/CAM RPDs. - Conclusions - First data on short-term complication rates of CAD/CAM double-crown-retained RPDs appear promising. To gather further evidence, prospective clinical trials over a longer follow-up time and with larger patient groups are required. - Clinical Significance - Hybrid CAD/CAM double-crown retained RPDs showed a successful clinical application after one year of follow-up. Further research is needed to evaluate their performance in comparison to conventional manufacturing methods.