Skip to main content
AAE25 Main banner
Back

Assessment of Clinical Outcomes

OR16 - Factors Affecting the Time Lapse between Restorations and Pulp Disease: A Retrospective Cohort Study

Wednesday, April 2, 2025
12:45 PM – 1:00 PM EST
Location: Hynes Convention Center, Floor 3, Room 310
Disclosure(s):
Gevik Malkhassian, D.D.S., M.Sc.: No financial relationships to disclose
Amir Azarpazhooh, D.D.S., Ph.D., M.Sc.: No financial relationships to disclose
Objective(s): This retrospective study aimed to assess the risk factors and critical time elapsed from restoration to pulpal deterioration.

Methods: A computerized search of the University of Toronto Faculty of Dentistry's electronic patient records (1999-2023) was performed to identify permanent teeth with a history of restoration(s) subsequent endodontic treatment. The mean time lapse between the terminal restoration and endodontic intervention was calculated and the effect of predictor variables was analyzed using Cox regression.

Results: 1,363 teeth met the inclusion criteria. The average time elapsed from any terminal restoration to subsequent endodontic treatment was 30.5 months (range: 0.5-266.8 months). It was the longest for crown (46.1 months, n=178), followed by amalgam (32.2 months, n=383), composite resin (26.6 months, n=714), and shortest for glass ionomer restorations (23.5 months, n=88). Terminal restorations with three or more surfaces (24.4 months, n=335), history of three or more prior restorations (24.9 months, n= 63), and history of pulp exposure (20.3 months, n=141) resulted in earlier development of pulp disease. The results for the predictor variables and comparison to matched controls are underway.

Conclusions: Restored teeth developed pulpal disease after a mean time lapse of 30.5 months. Crown and amalgam restorations resulted in slower development of pulp disease while multi-surface restorations, multiple restorative interventions, and history of pulp exposure expedited pulpal deterioration.


ADA CERP
The AAE is an ADA CERP Recognized Provider, a recognized provider in California (#2030), Florida (#PP0049). Programs of the AAE (#214682) are accepted by AGD for Fellowship/Mastership credit. ADA CERP is a service of the American Dental Association to assist dental professionals in identifying quality providers of continuing dental education. ADA CERP does not approve or endorse individual courses or instructors, nor does it imply acceptance of credit hours by boards of dentistry. The AAE designates this activity for up to 29.5 continuing education credits. Concerns or complaints about a CE provider may be directed to the provider or to the Commission for Continuing Education Provider Recognition at ada.org/cerp.

Portions of this AAE meeting may be photographed or audio/video recorded for various purposes, including reporting, promotion, archival, or sale and distribution. By registering, individuals agree that the AAE may photograph or record by audio/video their attendance and involvement in any portion of the meeting. Furthermore, individuals agree that the AAE may use these photographs and/or recordings without additional approval or permission.

AAE Code of Conduct for Conferences and Tradeshows
AAE Meetings and Events Health and Safety Code of Conduct

Back to Top