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CompletedNCT05648305Updated Dec 14, 2022

The Influences of Root Canal Complexity and Clinician Training on Root Canal Treatment Outcomes.

An observational study in Root Canal Infection, sponsored by Defence Primary Health Care, UK. Completed. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-12-14.

Sponsored by Defence Primary Health Care, UK · Observational

Study type
Observational
Model
Cohort
Time perspective
Retrospective
Enrollment
1,267
Ages
18 Years and older
Sex
All
01

Study summary

This is an observational study that assess the impacts of (a) root canal treatment complexity and (b) clinical training on (1) root canal treatment success and (2) tooth survival, in a United Kingdom Armed Forces cohort.

Read the detailed description

Background and Study Aims. This observational cohort study evaluates root canal treatment outcomes, using survival and success as the outcome measures. It aims to assess the influence of operator skill and RIOTN complexity on the clinical outcomes of RCT procedures previously undertaken within the UK Armed Forces.

Participation UK Armed Forces personnel that had previously received root canal treatment between 01/01/2015 and 01/09/2020.

Method

A Defence Statistics programme was used to identify cohorts of patients treated for Endodontic disease by GDPs and DWSI (GDPs who had undertaken a 1 year post-graduate training programme in Endodontics). The researcher group was calibrated to the study's method and this was initially piloted on 5 patient records, with further calibration undertaken until researcher consistency was achieved via inter-operator reliability testing. The researchers subsequently reviewed 1600 patient records, eventually establishing a cohort of 1267 patients (580 - Group 1 (GDP) and 687 - Group 2 (DWSI). The clinical records and radiographs of these groups were reviewed for the following:

  1. Tooth survival 2. RIOTN complexity at the time of treatment 3. RCT success (apical healing). Secondary factors assessed included: age, gender, smoking status, diabetic status, steroid status, presence of an indirect restoration, presence of a post, reasons for tooth loss (if tooth did not survive).

The collection of data has now been completed and is ready for analysis.

Risks and Benefits This study will benefit Defence Primary HealthCare and UKAF personnel as it will influence and shape future care provision for Endodontic disease within the military. There are no identified risks of participation.

Study Location The study is being run from the Defence Centre for Rehabilitative Dentistry, Evelyn Woods Road, Aldershot, GU11 2LS. The study is evaluation the outcomes of clinical practitioners working within the 200+ Dental Centres within the UK and overseas locations.

Funding There is no established funding for this study. There are no commercial or other conflicts of interest.

02

Conditions studied

  • Root Canal Infection

Keywords

  • Root Canal Treatment
03

In context

Lead sponsor

Defence Primary Health Care, UK is the lead sponsor of 2 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Male and Female personnel serving within the UK Armed Forces that had received root canal treatment during the study period.

Inclusion criteria

  • Served/ were serving within the UK Armed Forces.
  • Male and female.
  • Physically able to tolerate root canal treatment/ re-treatment procedures.
  • Received root canal treatment/ re-treatment for Endodontic disease by either a GDP or Dentist with Specialist interest (DWSI).
  • Aged between 18 - 70..
  • 12-month (or longer) post root canal treatment review radiograph and consultation.
  • Smoking and non-smoking patients
  • With and without Diabetes Mellitus 2
  • Taking/ not-taking steroid medications
  • With/ without other medical conditions.

Exclusion criteria

Exclusion Criteria:

  • On longer serving in the military within 12-months of root canal treatment completion.
  • Unable to tolerate root canal treatment/ re-treatment
  • No clinical follow-up of tooth (survival).
  • No radiographic follow-up of tooth (success).
05

Study design

Observational model
Cohort
Time perspective
Retrospective
Enrollment
1,267 participants (actual)
Patient registry
No

Groups and cohorts

  • General Dental Practitioners

    Cohort 1 consisted UK Armed Forces Personnel that received root canal treatment within the study period by General Dental Practitioners.

    Procedure: Root Canal Treatment/ Re-treatment

  • Dentists with Specialist Interest (DWSI)

    Cohort 2 consisted UK Armed Forces Personnel that received root canal treatment within the study period by DWSI, clinicians that had undertaken a 1-year post-graduate programme in Endodontics.

    Procedure: Root Canal Treatment/ Re-treatment

Interventions

  • ProcedureRoot Canal Treatment/ Re-treatment

    The provision of Root Canal Treatment for teeth with Endodontic infection or to prevent Endodontic infection.

    Also known as: Endodontic Therapy

06

What researchers measure

Primary outcomes

  1. 1. Tooth survival

    Tooth still present in the mouth at end of trial period.

    Time frame: 6-months - 48-months post-treatment.

  2. 2. Root Canal Treatment Success

    The absence of signs, symptoms and evidence of radiographic peri-apical radiolucency resolution.

    Time frame: 6-months - 48-months post-treatment.

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No — The data belongs to the UKAF. Requests for data sharing would require MOD approval.

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 14, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05648305
Lead sponsor
Defence Primary Health Care, UK
Collaborators
Eastman Dental Insitute and Hospital
Responsible party
Sponsor
First posted
Dec 13, 2022
Start date
Jan 1, 2015
Primary completion
Sep 1, 2020
Completion
Jan 31, 2022
Last update
Dec 14, 2022

Study contacts

Neil MacBeth, BDS PhD
study chair · Defence Primary Healthcare

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2022. You cannot join it, but the record below documents what was studied.

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