Clinical Evaluation of Internal Fit of Milled BioHPP Polyetheretherketone (PEEK) - Based Versus Zirconia-Based Single Crowns

Study Overview
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Brief Summary
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All ceramic crowns are indicated in case of mild to moderate discoloration, restoration of traumatized or fractured teeth and abnormal tooth anatomy. The success of dental restorations is determined by four main factors: biocompatibility, aesthetic value, resistance to fracture and marginal adaptation. . An inadequate marginal fit may compromise the longevity of the restoration since cement film exposure to the oral environment can lead to its dissolution . . Polyetheretherketone (PEEK) is a polymer that has many potentials uses in dentistry. Polyetheretherketone (PEEK) can be used to support fixed dental prostheses. However, information about physio mechanical characterization is still scarce. Aim of the study: - The aim of this study is to evaluate the internal fit of milled BioHPP PEEK-based versus zirconia-based single crowns.

Official Title
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Clinical Evaluation of Internal Fit of Milled BioHPP Polyetheretherketone (PEEK) - Based Versus Zirconia-Based Single Crowns

Conditions
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Badly Decayed Teeth andTeeth Restored With Large Filling Restorations and Endodontically Treated Teeth and Malformed Teeth and Malposed Teeth

Intervention / Treatment
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* Other: BioHPP PEEK copings veneered with composite resin


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: From 18-50 years old, be able to read and sign the informed consent document. Patient Have no active periodontal or pulpal diseases, have teeth with good restorations Patient Psychologically and physically able to withstand conventional dental procedures Patients with teeth problems indicated for single posterior crowns: Exclusion Criteria: Patient less than 18 or more than 50 years Patient with active resistant periodontal diseases Patients with poor oral hygiene and uncooperative patients Patients in the growth stage with partially erupted teeth Patient with Psychiatric problems or unrealistic expectations Patient with Lack of opposing dentition in the area of interest

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Zirconia single posterior crowns veneered with ceramics<br>'In the first visit, a Face-to-Face adherence session will be held in which the patient should be informed about the study steps and how to maintain oral hygiene measures. Further sessions will occur at the follow-up visits | Other: BioHPP PEEK copings veneered with composite resin<br>* In the first visit, a Face-to-Face adherence session will be held in which the patient should be informed about the study steps and how to maintain oral hygiene measures. Further sessions will occur at the follow-up visits . Participant patients will be asked about any problems they are having. Patients will be recalled every two months for one year for follow up visits.<br>|
| Experimental: BioHpp PEEK single posterior crowns veneered with compos<br>In the first visit, a Face-to-Face adherence session will be held in which the patient should be informed about the study steps and how to maintain oral hygiene measures. Further sessions will occur at the follow-up visits | Other: BioHPP PEEK copings veneered with composite resin<br>* In the first visit, a Face-to-Face adherence session will be held in which the patient should be informed about the study steps and how to maintain oral hygiene measures. Further sessions will occur at the follow-up visits . Participant patients will be asked about any problems they are having. Patients will be recalled every two months for one year for follow up visits.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Internal fit of the crown by measuring the thickness of the replica by steriomicroscope | measured by replica technique and steriomicroscope | one year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| secondary caries if present at the margin of the crown by using probe | Measured by modified Ryge criteria Alpha (A)The restoration is a continuation of existing anatomic form adjacent to the restoration. Bravo (B)There is visual evidence of dark keep discoloration adjacent to the restoration (but notAlpha (A)The restoration is a continuation of existing anatomic form adjacent to the restoration. Bravo (B)There is visual evidence of dark keep discoloration adjacent to the restoration (but not directly associated with cavosurface margins). directly associated with cavosurface margins). | one year |