Bite Force and Occlusal Force Distribution Following Root Canal Treatment.

Changes in Bite Force and Occlusal Force Distribution Following Root Canal Treatment, Restoration, and Over Time: A Prospective Observational Study

Status

Not yet recruiting

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT07626372

Acronym

B-FORCE RCT

Enrollment

Registered

2026-06-04

Start date

2026-06-08

Completion date

2030-10-31

Last updated

2026-06-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Endodontically Treated Teeth

Keywords

Bite force, occlusal force distribution, Endodontically treated teeth, Chewing side preference, Endodontic restoration, Prospective study

Brief summary

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.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

20 Years to 60 Years

Healthy volunteers

Yes

Inclusion criteria

* Premolars or molars diagnosed with pulp necrosis or previously initiate therapy with normal apical tissues, asymptomatic apical periodontitis, or chronic apical abscess without full coverage restoration. * Adequate remaining tooth structure for cuspal coverage restoration. * Presence of adjacent teeth and functional opposing natural teeth. * No analgesics drug effect at the time of investigation or not have taken analgesics 6 hours ago.

Exclusion criteria

* Patients undergoing other dental treatments during the study period that may interfere with occlusion or bite force distribution, such as orthodontic treatment, jaw surgery, or full mouth restoration. * Received treatments that cause weakness of the jaw and facial muscles, such as botox injections. * History or symptoms of temporomandibular disorders (TMD) * Periodontal disease with second- or third-degree mobility * Teeth presenting crack lines extending into the pulp chamber floor or root canal orifices.

Design outcomes

Primary

Measure	Time frame	Description
Maximum bite force	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.	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.
Relative occlusal force	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 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.

Secondary

Measure	Time frame	Description
Patients' subjective perception of chewing function	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.	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.

Countries

Thailand

Contacts

CONTACTThanomsuk Jearanaiphaisarn

thanomsuk.j@chula.ac.th6622188795

Outcome results