Evaluate the Effectiveness of an Experimental Urethane Dimethacrylate Resin Based Dental Composite Material

Study Overview
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Brief Summary
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This double blind randomized controlled prospective clinical trial will compare the clinical success of two tooth colored resin composite dental filling materials - TPH3 (Dentsply Caulk) and an experimental urethane dimethacrylate resin based composite resin (Dentsply Caulk) for wear resistance, staining and marginal seal using modified Ryge criteria to evaluate the posterior restorations for 24 months in duration

Detailed Description
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The purposes of this clinical trial is to evaluate two composite resins used to restore Class I and Class II cavities in teeth of adults. The clinical study will evaluate the resin composite restorations placed in Class I and Class II cavity preparations for anatomic form, color match, marginal integrity, marginal discoloration, proximal contact, polishability, caries, sensitivity, gingival index, staining,wear, and thermal response for 24 months..

Official Title
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Clinical Evaluation of an Experimental Urethane Dimethacrylate Resin Based Composite

Conditions
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Dental Caries, Restorative Material

Intervention / Treatment
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* Device: urethane dimethacrylate
* Device: TPH3
* Device: Esthet-X HD


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria:• must have given written consent to participate in the trial must be in need of at least two restorations in natural tooth replacement restorations with or without caries are acceptable must be available for the required post-operative follow-up visits restorations to be in bicuspids, 1st or 2nd molars restorations to be in contact with opposing natural or crowned teeth class II restorations must have at least one proximal contact restorations must have a buccal to lingual/palatal width equal to or greater than 1/3 the distance from buccal to lingual/palatal cusp tips 75% of the restorations must be Class II all restorations must have at least one occlusal contact in habitual closure Exclusion Criteria: have severe medical complications (organ transplants, long term antibiotic or steroid treatment, cancer or immunocompromised) or disabilities who may not be able to tolerate the time required to complete the restorations or to provide adequate oral hygiene have xerostomia either by taking medications known to produce xerostomia or those with radiation induced or Sjogren's syndrome patients have chronic periodontitis, rampant caries or poor oral hygiene which may require extraction of the teeth to be restored have a history of chronic bruxism and those unavailable for long term recall can not tolerate the rubber dam required for tooth isolation during preparation and restoration. do not meet all inclusion criteria present with any systemic or local disorders that contra-indicate the dental procedures included in this study have an unstable occlusion have severe bruxing or clenching or need of TMJ related therapy have teeth with periapical pathology or expected pulp exposures have teeth that are non-vital or that exhibit signs of pulpal pathology Pregnancy Known sensitivity to methacrylates and/or acrylates

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: All Participants<br>Participants who needed at least two tooth restorations | Device: urethane dimethacrylate<br>* Experimental urethane dimethacrylate resin based composite resin for teeth used with prime and Bond Elect bonding agent<br>Device: TPH3<br>* light-cured resin composite for teeth<br>Device: Esthet-X HD<br>* light cured resin composite for teeth made by Dentsply Caulk<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percent of Teeth With Anatomic Form Graded as A or B. | Anatomic form was graded as: A=The restoration is continuous with existing form. B=The restoration is discontinuous with existing anatomic form, but the existing material is not sufficient to expose dentine. | 24 months | 
| Percent of Teeth Scored as A or B for Color Match | A=The restoration appears to match the shade and translucency of adjacent tooth structure. B=The restoration does not match the shade and translucency of adjacent tooth structure, but the mismatch is within the normal range of tooth shades and translucency. | 24 months | 
| Percent of Teeth With Marginal Integrity Graded A, B1 and B2 | A= No visible evidence of a crevice along the margin into which the explorer will penetrate B1= Explorer clicks on the margin B2= Visible evidence of a crevice | 24 months | 
| Percent of Teeth With Marginal Discoloration of A or B | A= There is no visual evidence of marginal discoloration different from the color of the restorative material and from the color the adjacent tooth structure. B= There is visual evidence of marginal discoloration at the junction of the tooth structure and the restoration, but the discoloration has not penetrated along the restoration in a pulpal direction. | 24 months | 
| Percent of Teeth With Proximal Contact | A= Tight proximal contacts evaluated with dental floss. B= Proximal contacts are weak but present. C= No proximal contacts but not visibly open. NA= Class I restorations | 24 months | 
| Percent of Teeth With Polish-ability of A, B1 or B2 | A= Smooth & highly shiny, similar to enamel B1= Smooth & satin, highly reflective B2= Smooth & shiny but not highly reflective | 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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restorative material