Accuracy of an optical method for measuring the bite
| ISRCTN | ISRCTN17674370 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN17674370 |
| Protocol serial number | 200658679 |
| Sponsor | University of Leeds |
| Funder | Faculty of Medicine and Health, University of Leeds |
- Submission date
- 10/12/2014
- Registration date
- 15/01/2015
- Last edited
- 22/01/2019
- Recruitment status
- Stopped
- Overall study status
- Stopped
- Condition category
- Oral Health
Plain English summary of protocol
Background and study aims
The study is about dental occlusion (contact between teeth) and the aim is to investigate the accuracy of a new, non-invasive ‘optical’ technique to measure the horizontal axis of the jaw (the axis the jaw rotates around, when a subject closes their mouth). This axis needs to be recorded for many dental procedures. Current (mechanical) methods are invasive, time consuming and inaccurate. A simple, accurate method would raise the standard of care through improved diagnosis, treatment planning and better fitting dental prostheses.
Who can participate?
Adult health professionals recruited via posters, group emails and announcements at the end of relevant lectures. This research is part of a PhD.
What does the study involve?
Participants undergo a dental examination to exclude disease. Traditional impressions are then taken of the upper and lower teeth. These are cast in dental stone then digitised, to create ‘virtual’ dental models. Two cameras photograph the subjects’ front teeth. The teeth are illuminated with a pattern projected from a digital projector (rather than a camera flash). This combination enables accurate 3D photographs to be calculated. 3D photographs are taken at two differing degrees of jaw opening (one with the teeth almost touching, and one with a 10mm gape). The axis of jaw rotation can be calculated using these photographs, and the virtual models. The accuracy of this axis is investigated using two methods. Firstly, a 3D photograph is taken at an ‘intermediate’ jaw gape (5mm). The virtual models are rotated around the previously calculated axis, to produce an identical gape (5mm). The position of the virtual models is compared to the measured position. Secondly, the ‘intermediate’ jaw position is physically recorded, using dental bite registration paste (a fast-setting silicone paste, syringed between the teeth). This paste is removed, 3D-scanned and used to align the virtual models. This position is compared to the previously calculated position.
What are the possible benefits and risks of participating?
Not provided at time of registration
Where is the study run from?
University of Leeds (UK)
When is the study starting and how long is it expected to run for?
December 2014 to January 2015
Who is funding the study?
Faculty of Medicine and Health, University of Leeds (UK)
Who is the main contact?
Andrew Keeling
a.j.keeling@leeds.ac.uk
Contact information
Scientific
Leeds School of Dentistry
6.025 Worsley Building
Clarendon Way
Leeds
LS2 9LU
United Kingdom
| Phone | +44 (0)113 343 1762 |
|---|---|
| a.j.keeling@leeds.ac.uk |
Study information
| Primary study design | Observational |
|---|---|
| Study design | Single centre - Observing and recording the jaw movements of dentate subjects using a novel optical method, and comparing this to a standard silicone bite registration method |
| Secondary study design | Cross sectional study |
| Study type | Participant information sheet |
| Scientific title | Accuracy of optical recordings of the mandibular horizontal axis |
| Study objectives | With what accuracy can an inexpensive optical method record the mandibular horizontal axis? |
| Ethics approval(s) | University of Leeds Dental Research Ethics Committee, 23/10/2014, ref. 200658679 |
| Health condition(s) or problem(s) studied | Dental occlusion |
| Intervention | Subjects will have their jaw relationships measured using standard silicone bite registration material, and using a new optical method. |
| Intervention type | Other |
| Primary outcome measure(s) |
The distance between reference points on upper and lower digitised teeth will be compared using the standard (silicone) method and the new (optical) method |
| Key secondary outcome measure(s) |
Repeatability of these measurements |
| Completion date | 31/01/2015 |
| Reason abandoned (if study stopped) | Lack of staff/facilities/resources |
Eligibility
| Participant type(s) | Health professional |
|---|---|
| Age group | Adult |
| Sex | All |
| Target sample size at registration | 44 |
| Key inclusion criteria | Must have at least 4 upper and 4 lower anterior teeth |
| Key exclusion criteria | No pre-existing disease of the temporo-mandibular joint (jaw joint) |
| Date of first enrolment | 01/12/2014 |
| Date of final enrolment | 24/01/2015 |
Locations
Countries of recruitment
- United Kingdom
- England
Study participating centre
United Kingdom
Results and Publications
| Individual participant data (IPD) Intention to share | Yes |
|---|---|
| IPD sharing plan summary | Available on request |
| IPD sharing plan | The datasets generated during and/or analysed during the current study are/will be available upon request from Andrew Keeling (a.j.keeling@leeds.ac.uk) |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Participant information sheet | Participant information sheet | 11/11/2025 | 11/11/2025 | No | Yes |
Editorial Notes
22/01/2019: Study abandoned
02/06/2017: No publications found, verifying study status with principal investigator.
