Understanding the factors that affect clinical outcomes (such as tooth survival and apical healing) following non-surgical or surgical root canal treatment

ISRCTN ISRCTN28863406
DOI https://doi.org/10.1186/ISRCTN28863406
Secondary identifying numbers N/A
Submission date
15/06/2018
Registration date
28/06/2018
Last edited
28/06/2018
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Oral Health
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and Study aims
Root canal treatment is the procedure used to get rid of the bacteria present in the root canal system that cause inflammation or abscesses in the tissue around the end of the tooth where it fits into the jaw. The treatment involves drilling out of the canal space to allow thorough rinsing with a disinfecting solution to kill the bacteria. However, the best method of doing this is not known.
This study aims to identify the factors associated with good or poor tooth survival after root canal treatment by examining patient notes and X-rays from annual dentist visits. This will help dentists to choose the best ways of performing root canal treatment.

Who can participate?
1500 men or women aged over 16 years who are scheduled for root canal treatment or retreatment in the Department of Endodontics, Eastman Dental Hospital, UCLH.

What does the study involve?
Study participants will attend two appointments, with a 7-day interval, for routine root canal treatment or retreatment by one of the clinicians in the Endodontics Department. They will receive treatment as usual. The study will analyse information related to the pre-treatment condition of the tooth, details of the treatment, and condition of the tooth at each follow-up appointment from the patients' dental records.

What are the possible benefits and risks of participating?
Participants will receive treatment as usual. There is no direct benefit to the participating patients, but the information obtained may help improving the treatment of future patients suffering from the same condition. Participation in the study will not involve any disadvantages or additional risks.

Where is the study run from?
This study will take place at the Eastman Dental Hospital, UCLH, London, UK.

When is the study starting and how long is it expected to run for?
December 1995 to January 2023

Who is funding the study?
This study is self-funded. Clinical activities were carried out at the premises and under the sponsorship of Eastman Dental Hospital, UCLH.

Who is the main contact?
Professor Kishor Gulabivala
k.gulabivala@ucl.ac.uk

Contact information

Dr Yuan-Ling Ng
Scientific

Unit of Endodontology, UCL Eastman Dental Institute
Gray's Inn Road
London
WC1X 8LD
United Kingdom

Study information

Study designObservational longitudinal study
Primary study designObservational
Secondary study designLongitudinal study
Study setting(s)Hospital
Study typeTreatment
Participant information sheet No participant information sheet available
Scientific titleA prospective evaluation of the individual and interactive influence of pre-operative, intra-operative and post-operative factors on the outcome of endodontic treatment procedures
Study objectivesTo assess the survival probability and prognostic factors for periodontally involved teeth with advanced attachment loss managed by periodontal and root canal treatment, with or without root amputation
Ethics approval(s)Joint Research & Ethics Committee of UCL Hospitals NHS Trust, registered 06/12/1995, 96/E195. No formal ethics approval was required because the study only involved extraction of the data from clinical notes.
Health condition(s) or problem(s) studiedAdvanced periodontal disease
InterventionThe participants attend routine root canal treatment appointments and subsequent routine annual follow-ups for 4 years post-operatively. They only consent for donation of routine clinical data for the study.
Intervention typeOther
Primary outcome measureTooth survival assessed using tooth extraction information provided by patients, referring dentists or notes in patients’ records. The duration of follow-up was annually up to 4 years post-treatment.
Secondary outcome measuresPeriapical healing assessed using pain or swelling indicating periapical health based on clinical and radiographic examination. The duration of follow-up was annually up to 4 years post-treatment.
Overall study start date06/12/1995
Completion date01/01/2023

Eligibility

Participant type(s)Patient
Age groupAdult
SexBoth
Target number of participants112
Key inclusion criteria1. With teeth that exhibited 5 mm or more clinical attachment loss or furcation involvement
2. With teeth that had undergone non-surgical periodontal debridement
3. Had undergone elective non-surgical root canal treatment prior to root amputation, or root canal treatment for management of concomitant pulpal or periapical pathosis followed by surgical periodontal debridement after being diagnosed as a “perio-endo” problem
Key exclusion criteria1. With teeth with incomplete periodontal or root canal treatment data
2. With teeth with incomplete root canal treatment
Date of first enrolment01/04/1996
Date of final enrolment01/01/2019

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

Eastman Dental Hospital, UCLH
256 Gray's Inn Road
London
WC1X 8LD
United Kingdom

Sponsor information

Eastman Dental Institute, University College London
Hospital/treatment centre

256 Grays Inn Road
London
WC1X 8LD
England
United Kingdom

ROR logo "ROR" https://ror.org/02jx3x895

Funders

Funder type

Not defined

self funded

No information available

Results and Publications

Intention to publish date01/01/2024
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryData sharing statement to be made available at a later date
Publication and dissemination planPlanned publication in a high-impact peer-reviewed journal
IPD sharing planThe data sharing plans for the current study are unknown and will be made available at a later date.