Survival time of post and cores after recementation: A 16-year retrospective study with special focus on loss of retention

Jonas Adrian Helmut Vogler; Moritz Lehmann; Maximillane Amelie Schlenz; Karina Zierden; Peter Rehmann; Bernd Wöstmann

doi:10.1016/j.jdent.2022.104314

Survival time of post and cores after recementation: A 16-year retrospective study with special focus on loss of retention

J Dent. 2022 Dec:127:104314. doi: 10.1016/j.jdent.2022.104314. Epub 2022 Sep 30.

Authors

Jonas Adrian Helmut Vogler¹, Moritz Lehmann², Maximillane Amelie Schlenz², Karina Zierden², Peter Rehmann², Bernd Wöstmann²

Affiliations

¹ Justus Liebig University, Dental Clinic - Department of Prosthodontics, Schlangenzahl 14, 35392 Giessen, Germany. Electronic address: jonas.a.vogler@dentist.med.uni-giessen.de.
² Justus Liebig University, Dental Clinic - Department of Prosthodontics, Schlangenzahl 14, 35392 Giessen, Germany.

PMID: 36184006
DOI: 10.1016/j.jdent.2022.104314

Abstract

Objectives: Numerous studies investigating the survival time of post and cores have found that loss of retention is the most common cause of failure Nevertheless, investigations focusing on decementation, survival after recementation, and the influencing parameters in a large number of patients with long follow-up periods are lacking. Therefore, the aim of this short communication article is the survival analysis of post and cores after recementation and repeated loss of retention.

Materials and methods: During the observation period (2004-2020), 653 patients received 953 post and cores. From these, 112 post and cores which suffered loss of retention were selected. The patient files were analysed for the following parameters: Type of covering prosthetic restoration, location, type of tooth, luting material, post and core material, bone attachment and therapist. The survival time until loss of retention or repeated decementations after recementation was documented. Survival probability was assessed using Kaplan-Meier and Cox regression analyses.

Results: The average time until decementation was 13.33 years. The cumulative decementation rate was 11.8%, while in 42.0% of the cases, post and cores showed multiple losses of retention. A significant influence (Kaplan-Meier analysis) was recorded for the type of covering prosthetic restoration, type of tooth, luting material, post and core material and bone attachment. The multifactorial survival analysis (Cox regression) showed a significant influence of patient's age and the type of covering prosthetic restoration.

Conclusions: Once decementation occurs, recementation neither guarantees definitive fit nor necessarily predetermines repeated decementations.

Clinical significance: Post and cores should be avoided under primary crown-retained removable partial dentures (RPD). If this treatment is inevitable, a continuous follow-up is necessary to check the denture for proper fit to the tissues to prevent overloading on the post and core.

Keywords: Cox regression; Kaplan–Meier analysis; Post and core; Retrospective study; Survival time.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Crowns
Dental Abutments
Dental Restoration Failure*
Denture, Partial, Removable*
Follow-Up Studies
Humans
Retrospective Studies