Gingival Response and Marginal Adaptation of Zirconia Crowns With Two Subgingival Margin Designs

Cairo University (CU)

Status: Unknown

Conditions: Gingival Recession, Localized

Treatments: Procedure: Feather edge finish line preparation; Procedure: Deep chamfer finish line preparation

Study type: Interventional

Funder types: Other

Identifiers

NCT04729569

161020

Details and patient eligibility

About

The aim of the study is to evaluate the effect of feather edge finish line and deep chamfer finish line on gingival position, bleeding on probing and marginal adaptation.

Full description

The aim of the study is to evaluate the effect of feather edge finish line and deep chamfer finish line on gingival position, bleeding on probing and marginal adaptation.

Gingival bleeding on probing will be evaluated before treatment. Preparation for all ceramic full coverage restoration will be performed according to manufacturer instructions by one operator. Type of finish line (whether feather edge or deep chamfer finish line) will be selected randomly according to a computer generated randomization list. Restorative margins will be placed subgingivally. Zirconia crowns will be fabricated for the prepared teeth and cemented using resin luting agent. At 6 months and 12 months after the cementation, restorative margin position relative to the gingival margin will be recorded. Bleeding on probing and marginal adaptation will also be recorded.

Enrollment: 30 estimated patients

Sex: All

Ages: 18 to 50 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Patients 18 years to 50 years old
• Dentate patients planned for a single full coverage restoration in the posterior area.
• Patients with no active periodontal disease.
• >2mm of keratinized tissue

Exclusion criteria

• Smoking (>10 cigarettes a day)
• Substance abuse history
• Patients with poor oral hygiene and high caries index
• Patients suffering from abnormal occlusal habits for example clenching or bruxism
• Local or systemic disease (endocrine, renal, hematologic, hepatic, immunosuppressive)
• Current steroid/chemotherapy
• Head and neck irradiation
• Pregnancy
• Inability or unwillingness to return for follow up visits.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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30 participants in 2 patient groups

Tested finish line preparation

Other group

Description:

Feather edge finish line preparation (Intervention)

Treatment:

Procedure: Feather edge finish line preparation

Comparator finish line preparation

Active Comparator group

Description:

Deep chamfer finish line preparation (Comparator)

Treatment:

Procedure: Deep chamfer finish line preparation