Study Comparing Modified Endocrown Versus Personalized Post-core and Crown for Large Tooth Defects After Root Canal Treatment

What this Trial Is About

Researchers are evaluating two types of dental restorations for premolars with large tooth defects after complete root canal treatment. This multicenter, randomized controlled, single-blind trial aims to compare the survival rates of a modified endocrown restoration and a personalized post-core combined with a full crown. The study addresses a gap in clinical evidence for the modified endocrown and seeks to provide strong evidence for improving and standardizing dental restoration methods. Participants treated premolars will be randomly assigned to one of two groups. One group will receive a modified endocrown restoration designed by combining the advantages of post-core crowns and endocrowns, using digital scanning and CADCAM cutting systems with lithium disilicate glass ceramic material. The other group will be restored with a personalized post-core and full crown, involving post-space preparation, core restoration with a cobalt-chromium post, and a lithium-disilicate ceramic crown. Both restoration procedures include detailed preparation and bonding techniques. Participants will have follow-up visits at 6 months, 1 year, and 2 years after treatment. Clinical and imaging examinations will evaluate the survival rates of the two restorations as the primary outcome. Additional assessments include measuring tooth reserve volume, patient satisfaction after 2 years, and the amount of grinding tissue and occlusal adjustment time immediately after restoration. The total participation duration is up to 2 years, with ongoing monitoring to assess restoration performance and patient experience.

Clinical Trial of Modified Endocrown and Personalized Post-core and Crown for Large-area Tooth Defects After Root Canal Treatment