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

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

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03521024

Enrollment

Registered

2018-05-11

Start date

2018-09-15

Completion date

2019-09-15

Last updated

2018-05-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Tooth Loss

Keywords

Zirconia implants, PEKK crowns, high performance polymer crowns

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.

Interventions

OTHERpoly ether ketone ketone

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

OTHERlithium disilicate

well documented in the literatures as successful restoration modality.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Subject, Outcomes Assessor)

Intervention model description

Patient will receive a restoration with superior function, esthetics, and quality.

Eligibility

Sex/Gender

ALL

Age

18 Years to 45 Years

Healthy volunteers

Yes

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

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

Design outcomes

Primary

Measure	Time frame	Description
Esthetic outcome	9 month	measured by pink and white esthetics score

Secondary

Measure	Time frame	Description
bone resorption	9 month	measured by CBCT and measuring unit Housfield Unit(HU)

Contacts

Primary Contactlamiaa Abdelsalam, MSc

dr.l.fadaly@gmail.com201015833015

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026