An observational study in Endodontically Treated Teeth, sponsored by Chulalongkorn University. Not yet recruiting at 1 site in Thailand. Open to participants aged 20 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-06-04.
Sponsored by Chulalongkorn University · Observational
Understanding the changes in bite force and occlusal force distribution in ETT is clinically important, as it can directly influence tooth prognosis, guide restorative treatment planning, and impact the long-term survival of the treated tooth. Therefore, this study aims to further explore changes and possible correlation in maximum bite force (MBF), occlusal force distribution and patients' subjective perception of chewing function of endodontically treated teeth after non-surgical root canal treatment, subsequent restoration, and during long-term follow-up, along with comparing to contralateral vital teeth.
Methods: Patients aged 20-60 years who underwent non-surgical root canal treatment at the Graduate Endodontic Clinic, Faculty of Dentistry, Chulalongkorn University, with the following teeth indicated for endodontic treatment. Measurements of maximum bite force (MBF) of ETT and contralateral vital teeth, relative occlusal force (ROF), and questionnaire responses, are performed at the following time points: before NS-RCT, 1 month after completion of NS-RCT (before doing restoration), 3 months after crown restoration, 1, 2 and 4 years after completion of NS-RCT.
Differences in MBF and ROF over time points within subjects and differences in MBF and ROF between ETT and their contralateral vital teeth were statistically analyzed.
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Patients who underwent non-surgical root canal treatment at the Graduate Endodontic Clinic, Faculty of Dentistry, Chulalongkorn University
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Exclusion Criteria:
Patients aged 20-60 years undergoing non-surgical root canal treatment and subsequent restoration at the Graduate Endodontic Clinic, Faculty of Dentistry, Chulalongkorn University, with prospective assessment of bite force and occlusal force distribution over time.
Maximum bite force
Maximum bite force of the endodontically treated tooth and its contralateral tooth in each patient will be measured using the FlexiForce ELF System and FlexiForce B201 sensor.
Time frame: before NS-RCT, 1 month after completion of NS-RCT (before doing restoration), 3 months after crown restoration, 1, 2 and 4 years after completion of NS-RCT.
Relative occlusal force
Relative Occlusal Force are measured with the T-Scan III system. A device will be inserted into the mouth of the patients, and they are instructed to bite firmly three times at the maximum cusp intersection position.
Time frame: before NS-RCT, 1 month after completion of NS-RCT (before doing restoration), 3 months after crown restoration, 1, 2 and 4 years after completion of NS-RCT.
Patients' subjective perception of chewing function
A questionnaire will be used to assess patients' subjective perceptions of chewing function, including preferred chewing side, frequency of hard food consumption, and parafunctional habits such as bruxism and clenching.
Time frame: before NS-RCT, 1 month after completion of NS-RCT (before doing restoration), 3 months after crown restoration, 1, 2 and 4 years after completion of NS-RCT.
Plan to share: No
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This study is not yet recruiting, as verified in May 2026. You cannot join it, but the record below documents what was studied.
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