NCT07259265

Vital and Non-vital Posterior Teeth Restored With Onlays and Single Crowns Using Three Different Restorative Materials.

Longterm Outcomes of Vital and Non-vital Posterior Teeth Restored With Onlays and Single Crowns: a Randomized, Controlled, Clinical Trial

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 120 (actual)
• Sponsor: Dr. med. dent. Malin Strasding · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

The objective of this study is to assess the survival rate and the biological and technical outcomes of onlays and single crowns made out of different restorative materials on vital and non-vital teeth. The onlays are made either out of a lithium-disilicate glass ceramic (E.max CAD, Ivoclar Vivadent), hybrid ceramic (VITA ENAMIC, VITA Zahnfabrik) or out of a lithium aluminosilicate glass ceramic reinforced with lithium disilicate (N!ce, Straumann). The crowns are made either out of lithium aluminosilicate glass ceramic reinforced with lithium disilicate (N!ce, Straumann), hybrid ceramic (VITA ENAMIC, VITA Zahnfabrik) or lithium-disilicate glass ceramic (E.max CAD, Ivoclar Vivadent).

Conditions

• Decayed Teeth

Interventions

Type	Name	Description
PROCEDURE	Crown preparation	The conventional crown preparation will be performed.
PROCEDURE	Onlay preparation	A defect-oriented tooth preparation is performed for an onlay restoration.

Timeline

• Start date: 2019-03-04
• Primary completion: 2024-02-06
• Completion: 2024-02-06
• First posted: 2025-12-02
• Last updated: 2025-12-02

Locations

1 site across 1 country: Switzerland