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Bite Force and Occlusal Force Distribution Following Root Canal Treatment. (B-FORCE RCT)

31. maj 2026 opdateret af: Thanomsuk Jearanaiphaisarn, Chulalongkorn University

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

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.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Undersøgelsestype

Observationel

Tilmelding (Anslået)

70

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

  • Thailand
      • Bangkok, Thailand, 10330
        • Graduate Endodontic Clinic, Faculty of Dentistry, Chulalongkorn university
        • Kontakt:
        • Kontakt:
        • Ledende efterforsker:
          • Prom Wongmaneerojn

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Patients who underwent non-surgical root canal treatment at the Graduate Endodontic Clinic, Faculty of Dentistry, Chulalongkorn University

Beskrivelse

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.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Endodontic patient
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.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Maximum bite force
Tidsramme: 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.
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
Tidsramme: 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.
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.

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Patients' subjective perception of chewing function
Tidsramme: 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.
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.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Chulalongkorn University

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

8. juni 2026

Primær færdiggørelse (Anslået)

31. oktober 2027

Studieafslutning (Anslået)

31. oktober 2030

Datoer for studieregistrering

Først indsendt

31. maj 2026

Først indsendt, der opfyldte QC-kriterier

31. maj 2026

Først opslået (Faktiske)

4. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

31. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • HREC-DCU 2025-206

Plan for individuelle deltagerdata (IPD)

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