One Year Clinical Evaluation of Pressed BioHPP Polyether Ether Ketone (PEEK)-Based Versus Zirconia-Based Single Crowns

Study Overview
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Brief Summary
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The clinical performance (using the modified Ryge criteria) and patient satisfaction ( using VAS questionnaire) of pressed BioHPP PEEK based posterior single crowns compared to zirconia based crowns are questionable as the peek is considered as a new material and need to be tested for future clinical application.

Detailed Description
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The study is held to evaluate the clinical performance (using the modified Ryge criteria) and patient satisfaction ( using VAS questionnaire) of pressed BioHPP PEEK based posterior single crowns compared to zirconia based crowns after one year follow-up. Patients requiring posterior single crowns are collected. After teeth preparation to receive single full coverage crowns, secondary impressions were taken. The patients were divided randomly into two groups ;one group will receive pressed BioHPP PEEK single crowns (the intervention) and the other group will receive veneered zirconia single crowns (the control). Fracture of restorations (1ry outcome) using modified Ryge criteria and the marginal adaptation (2ry outcome) using modified Ryge criteria and finally the patient satisfaction (3ry outcome) using a questionnaire, all outcomes will be evaluated every 2 months with total period of follow-up of one year.

Official Title
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One Year Clinical Evaluation of Pressed BioHPP Polyether Ether Ketone (PEEK)-Based Versus Zirconia-Based Single Crowns (Randomized Controlled Clinical Trial)

Conditions
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Patient Satisfaction, Clinical Performance

Intervention / Treatment
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* Other: BioHPP PEEK single posterior crowns
* Other: zirconia-based single posterior crowns


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. Have no active periodontal or pulpal diseases, have teeth with good restorations Psychologically and physically able to withstand conventional dental procedures Patients with teeth problems indicated for single posterior crowns: Badly decayed teeth Teeth restored with large filling restorations Endodontically treated teeth Malformed teeth Malposed teeth (Tilted, over-erupted, rotated, etc.) Spacing between posterior teeth Able to return for follow-up examinations and evaluation 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 Pregnant women Patients in the growth stage with partially erupted teeth Psychiatric problems or unrealistic expectations Lack of opposing dentition in the area of interest Failed endodotically treated teeth; short or overextended, narrow, missed canal, ledge or perforated teeth (even if no clear symptoms for failure)

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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Accepts Healthy Volunteers

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
Interventional Model Description: patients requiring posterior single crowns.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: BioHPP PEEK single posterior crowns<br>BioHPP PEEK copings veneered with composite resin | Other: BioHPP PEEK single posterior crowns<br>* BioHPP is a 20% ceramic reinforced, semicrystalline, thermoplastic and radiolucent polymeric material, used for fabrication of high strength fixed and removable prostheses. it has advantages of bio-compatibility, low density, light weight, shock absorption.<br>* Other names: BioHPP PEEk copings veneered with composite resin;|
| Active Comparator: zirconia-based single posterior crowns<br>yttria stabilized tetragonal zirconia used as copings to be veneered with porcelain | Other: zirconia-based single posterior crowns<br>* ZrO2, a ceramic material used for medical devices, displays good esthetic appearance, high mechanical strength, and high biocompatibility and is used in a wide range of indications, such as frameworks, implants, and abutments. In addition, it's very good long-term stability and reliability was proven in a 10-year clinical study. These excellent material properties and the transformation behavior are explained by the yttrium oxide stabilization of ZrO2.<br>* Other names: zirconia copings veneered with porcelain;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Fracture | Fracture of the single crowns assessed by modified Ryge criteria (Alpha, Bravo, Charlie and Delta) | one year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Marginal adaptation | Marginal adaptation assessed by modified Ryge criteria (Alpha, Bravo, Charlie and Delt | one year |