Investigate the bond strength of orthodontic brackets to MIH teeth
Research type
Research Study
Full title
A study to investigate the bond strength of orthodontic brackets to hypomineralised teeth
IRAS ID
188739
Contact name
Richard Balmer
Contact email
Sponsor organisation
University of Leeds
Duration of Study in the UK
1 years, 6 months, 29 days
Research summary
This study is being carried out to assess if there is a difference in the bond (adhesive) strength of orthodontic brackets (braces) bonded to teeth with molar-incisor hypomineralisation (defective enamel) compared to orthodontic brackets bonded to teeth with normal enamel in a laboratory setting.
Molar- incisor hypomineralisation (MIH) is caused by a systemic disturbance when the teeth are forming; in order to diagnose MIH, at least one first permanent molar must be affected. Affected teeth have patches of defective enamel affecting the biting aspect and the cheek side of the tooth, these patches can be white, cream, yellow or brown in colour.
Severely affected teeth can break down or develop tooth decay; necessitating multiple fillings. Fillings in teeth with MIH often need replacing as there is reduced bond (adhesive) strength between the filling material and the defective enamel.
MIH affects 15-40% of children in the UK and currently, 26- 37% of 12 - 15 year olds in the UK population are undergoing orthodontic treatment (braces); some of these children will also be affected by MIH.
Braces are bonded onto teeth using the same technique that is used when placing a filling, braces that are placed onto teeth affected by MIH may have a weaker bond (adhesive) strength. This could lead to increased treatment times or poorer orthodontic outcomes for children with MIH.
Any child between 6- 16 years of age who is examined in the Leeds Dental Institute, Doncaster or York Community Dental Services and require molar teeth extracting for orthodontic reasons or due to MIH will be eligible to be included in the study.
Participants will be recruited until 30 defective and 30 teeth with normal enamel have been collected.
The results will provide useful knowledge to improve the orthodontic care of future patients with MIH.REC name
West Midlands - Solihull Research Ethics Committee
REC reference
16/WM/0135
Date of REC Opinion
23 Mar 2016
REC opinion
Further Information Favourable Opinion