Aim The aim of this multicentre, parallel-group randomized clinical trial was to compare the effectiveness of mineral trioxide aggregate (MTA) and a conventional calcium hydroxide liner (CH) as direct pulp capping materials in adult molars with carious pulpal exposure.Methodology Seventy adults aged 18 to 55 years were randomly allocated to two parallel arms:MTA (White ProRoot, Dentsply, Tulsa Dental, Tulsa, OK, USA) (n=33) and CH (Dycal ® , Dentsply DeTrey GmbH, Konstanz, Germany) (n=37). The teeth were temporized for one week with glass ionomer (Fuji IX, GC Corp, Tokyo, Japan), and then permanently restored with a composite resin.The subjects were followed up after 1 week and at 6, 12, 24, and 36 months. The primary outcome was the survival of the capped pulps, and the secondary outcome was postoperative pain after 1 week.Survival was defined as a non-symptomatic tooth that responded to sensibility testing and did not exhibit periapical changes on radiograph. At each check-up, the pulp was tested for sensibility and a periapical radiograph was taken (excluding the radiographs taken at the 1-week follow up). KaplanMeier survival analysis and log-rank test was used to assess the significant difference in the survival curves between groups. Chi-square test was used to assess the association between the materials and preoperative and postoperative pain.
Accepted ArticleThis article is protected by copyright. All rights reserved.Results At 36 months, the Kaplan-Meier survival analysis showed a cumulative estimate rate of 85% for the MTA group and 52% for the CH group (p=0.006). There was no significant association between the capping material and postoperative pain.Conclusions MTA performed more effectively than a conventional CH liner as a direct pulp capping material in molars with carious pulpal exposure in adult patients. This study has been registered at ClinicalTrials.gov, number NCT01224925.