evaluation of the marginal adaptation of single unit crowns

Not Applicable

Conditions: marginal adaptation of single unit restorations.

Registration Number: IRCT20160213026538N3

Lead Sponsor: Kermanshah University of Medical Sciences

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Complete

Sex: All

Target Recruitment: 60

Inclusion Criteria

good general health(no systemic disease that should negatively influence the clinical outcome)
periodontally healthy(plaque index and bleeding on probing had to be below 20% previously to the prosthodontic treatment)
no obvious signs or symptoms of bruxing and/or clenching((bruxismsuch as attritions and existing fractures on the patientsnatural teeth or reconstructions, no pain on muscular palpationor tendomyopathies, no pain causing joint sound, no selfreportedbruxing or clenching)
abutment teeth in need of reconstruction (abutment teeth withexisting extensive cavities, fillings or crowns)
non-vital abutment teeth with positive long-term prognosis uponclinical and radiological assessment (no peri-apical or apparentperiodontal lesions)
the tooth should have enough periodontal support for single unit restoration an also minimal mobility
the tooth should have enough preparation length to ensure the retention and resistance forms
the patient is ready to take part in the study and sign the testimonial

Exclusion Criteria

The patient is not willing or able to observe oral hygiene ( Plaque index and BOP should be below 20%).
The abutment tooth has clinical sign.
The tooth has grade two or more mobility.
parafunctional habits
Periodontitis, severe gingivitis, poor oral hygiene and high caries activity

Study & Design

Study Type: interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Marginal adaptation of restorations. Timepoint: before and after veneering of restorations. Method of measurement: adaptation is measured using 3 methods:1-parallal bite wing radiography2-touch using a sonde3-silicone replica technique.

Secondary Outcome Measures