Study of the Success and Survival of Dental Composite Restorations Being Repaired Instead of Being Replaced (RVR)

Dalhousie University

Status: Withdrawn

Conditions: Failing Dental Composite Restorations

Treatments: Procedure: Replace; Procedure: Repair

Study type: Interventional

Funder types: Other

Identifiers

NCT02046109

DalDent-2014-01

Details and patient eligibility

About

The objective of this trial is to compare the success (as assessed by a pre-defined set of outcome) of failing composite resin restorations that are repaired using diamond bur induced surface abrasion, to those that are completely replaced.

It is hypothesized that both treatment will have comparable success rate.

Full description

This study is a single-blind randomized non-inferiority trial using parallel groups.

Patients recruited into the study will be randomly assigned to one of two treatment groups. Subjects allocated to Group 1 will have their defective restoration completely replaced while subjects allocated to Group 2 will have their defective restoration repaired.

The success of the treatments will be assessed immediately following the intervention (baseline) and 12 months later.

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients of the Dalhousie University Dental Clinic who are:
• Age 18 and over
• Capable of providing informed consent
• Asymptomatic permanent teeth with class III, IV, V or veneer composite restorations on the facial/buccal surface, requiring treatment (e.g. stain, chipping or color discrepancy).
• Restoration must present with a portion (mesial, distal, gingival or occlusal) that can be completely retained to allow repair.

Exclusion criteria

• Patients with contra-indications for regular dental treatment based on their medical history
• Teeth with active caries
• Teeth with multiple overlapping composite restorations
• Patients with uncontrolled periodontal disease
• Restorations smaller than 3mm diameter

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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0 participants in 2 patient groups

Repair

Experimental group

Description:

Subjects in the Repair group will be given a local anesthetic only if required (i.e. for restorations extending gingivally or on exposed dentin surface) as per usual clinical protocol. The existing restoration will not be removed. The surface of the existing restoration will be roughened with a Brasseler 8856 bur without extending to the surrounding enamel (except is the defect being repaired is adjacent to enamel). No accessory groves/pits for retention will be prepared. To repair the restoration, the surface will be etched using 35% phosphoric acid, and then 3M ESPE Scotchbond Universal Adhesive System followed by 3M ESPE Filtek Supreme Ultra Universal Restorative composite will be used as per the manufacturer's instructions.

Treatment:

Procedure: Repair

Replace

Active Comparator group

Description:

Subjects in the Replace group will be given local anesthetic (an injection of 2% lidocaine with 1:100 000 epinephrine). The type of injection and dosage of anesthetics will be dependent on the tooth being treated, and will follow the usual protocol used in the Dalhousie Dentistry undergraduate clinics. The existing composite restoration will then be removed and the peripheral enamel beveled if not already beveled. To restore the tooth, the surface will be etched using 35% phosphoric acid, and then 3M ESPE Scotchbond Universal Adhesive System followed by 3M ESPE Filtek Supreme Ultra Universal Restorative composite will be used as per the manufacturer's instructions.

Treatment:

Procedure: Replace