Tooth replacement is a significant issue in the World. Such replacement is considered
important by patients to improve aesthetics, function and quality of life. Tooth replacement
is therefore a significant issue. Resin-bonded bridges (RBBs) are conservative and
cost-effective tooth replacement option that involves minimal tooth preparation and are
secured in place with an adhesive cement by bonding to the outer enamel layer of the tooth.
Clinical reports of these prostheses at the University of Hong Kong shows some of the highest
success rate and greatest longevity in the dental literature. However, a problem with this
type of prosthesis in that it still needs some tooth preparation to accommodate the framework
thickness of the bridge. In some patients with tooth wear, this may mean cutting through the
enamel crown down into dentine which will weaken the tooth. In light of the tooth preparation
some patients will refuse this treatment, in particular patients with dental drill phobias.
The aim of this study is to investigate RBBs with tooth preparation and with no tooth
preparation for the replacement of single missing teeth in a randomized controlled trial.
However, a significant consequence of a no preparation RBB will mean that after cementation
the prosthesis will interfere with the patient's bite, making the bridge prosthesis stand
high. This will take time for the patient's original occlusion to re-establish itself by the
movement of the tooth supporting the bridge. Despite the success of "supra-occluding"
restoration has been reported in some studies, currently neither no preparation nor
supraoccluding dental bridges are the standard of care for general dental practitioners and
have not been reported on as a clinical trial in the literature. Most symptoms reported for
supraoccluding restorations were transient and are reversible. The findings of this research
will have significant impact on the teaching and practice for clinical prosthodontics and
patient care worldwide. Patients will have a dental prosthesis that requires no dental
drilling, no local anaesthetic and will have a stronger tooth supporting the bridge that
should have greater longevity. More patients, in particular phobic patients will therefore
seek treatment for tooth replacement with this conservative treatment option.