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

Not Applicable

• Conditions: Tooth Loss
• Interventions: Other: poly ether ketone ketone; Other: lithium disilicate

• Registration Number: NCT03521024
• Lead Sponsor: Cairo University

Brief Summary

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

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.

Study Timeline

• Study First Submitted: 2018-04-26
• Status Verified: 2018-05
• Study First Submitted QC: 2018-05-08
• Last Update Submitted: 2018-05-08
• Study First Posted: 2018-05-11
• Last Update Posted: 2018-05-11
• Study Start: 2018-09-15
• Primary Completion: 2019-06-15
• Study Completion: 2019-09-15

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 10

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

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Exclusion Criteria

1. Current pregnancy.
2. Psychiatric disorders.
3. Smokers
4. Poor motivation.
5. Several occlusal parafunction.
6. Persistent intraoral infections.
7. Severe mucosal disease.
8. Active periodontitis.
9. Poor oral hygiene.
10. Lack of occluding dentition at implant rehabilitation level

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
poly ether ketone ketone crowns	poly ether ketone ketone	pekkton
lithium disilicate crowns	lithium disilicate	lithium disilicate crowns are well documented in the literatures as successful restoration modality.
lithium disilicate crowns	poly ether ketone ketone	lithium disilicate crowns are well documented in the literatures as successful restoration modality.
poly ether ketone ketone crowns	lithium disilicate	pekkton

Primary Outcome Measures

Name	Time	Method
Esthetic outcome	9 month	measured by pink and white esthetics score

Secondary Outcome Measures

Name	Time	Method
bone resorption	9 month	measured by CBCT and measuring unit Housfield Unit(HU)