Effect of Zirconia Implant Supported PEKK Crowns Versus Lithium Disilicate Crowns on Esthetics

Study Overview
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Brief Summary
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aim of study is to evaluate esthetic and biomechanical outcome of maxillary anterior single-tooth zirconia implant supported PEKK crowns compared to lithium disilicate crowns on PEKK abutments .

Detailed Description
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High performance polymers may be a valid alternative to other conventional materials for abutments and crowns over zirconia implants because of their cushioning effect and elastic modulus (5.1GPa), which absorb occlusal forces and avoid overload of the underlying bone from the direct transmission of biting impacts ; which could optimize and preserve osseointegration with time. Zirconia implants with high performance polymers restorations can be considered a good alternative for replacing natural teeth. For many years lithium disilicate has been the esthetics standard used in Veneers ,Inlays , onlays, occlusal veneers, partial crowns,minimally invasive crowns and Implant superstructures due to its natural-looking tooth colouring and excellent light-optical properties. Due to the promising esthetics of high performance polymers as it can be veneered with different veneering materials it would successfully restore esthetics.

Official Title
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Evaluation of Esthetic and Biomechanical Outcome of Maxillary Anterior Single-Tooth Zirconia Implant Supported PEKK Crowns Versus Lithium Disilicate Crowns on PEKK Abutments: Randomized Controlled Trial

Conditions
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Tooth Loss

Intervention / Treatment
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* Other: poly ether ketone ketone
* Other: lithium disilicate


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age >18 years No active intraoral or systemic disease No pregnancy or lactation controlled periodontal conditions Adequate bone volume to place an implant Occlusal function with a natural tooth Exclusion Criteria: Current pregnancy. Psychiatric disorders. Smokers Poor motivation. Several occlusal parafunction. Persistent intraoral infections. Severe mucosal disease. Active periodontitis. Poor oral hygiene. Lack of occluding dentition at implant rehabilitation level

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 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: Patient will receive a restoration with superior function, esthetics, and quality.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: lithium disilicate crowns<br>lithium disilicate crowns are well documented in the literatures as successful restoration modality. | Other: poly ether ketone ketone<br>* Polyetherketoneketone (PEKK) forms a group of high-performance thermoplastic polymers. PEKK shows excellent biocompatibility and exhibits outstanding properties such as high wear resistance and high compressive (246 MPa), flexural (5.0GPa), and tensile strengths (115 MPa). The material is lightweight, allows shock absorption, and can be veneered with various commercially available dental materials<br>Other: lithium disilicate<br>* well documented in the literatures as successful restoration modality.<br>|
| Experimental: poly ether ketone ketone crowns<br>pekkton | Other: poly ether ketone ketone<br>* Polyetherketoneketone (PEKK) forms a group of high-performance thermoplastic polymers. PEKK shows excellent biocompatibility and exhibits outstanding properties such as high wear resistance and high compressive (246 MPa), flexural (5.0GPa), and tensile strengths (115 MPa). The material is lightweight, allows shock absorption, and can be veneered with various commercially available dental materials<br>Other: lithium disilicate<br>* well documented in the literatures as successful restoration modality.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Esthetic outcome | measured by pink and white esthetics score | 9 month | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| bone resorption | measured by CBCT and measuring unit Housfield Unit(HU) | 9 month | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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high performance polymer crowns, Zirconia implants, PEKK crowns