evaluation of the marginal adaptation of single unit crowns

clinical evaluation of the marginal adaptation of metal ceramic single unit crowns fabricated by lost wax technique and new Computer Aided Design/Computer Aided Manufacturing technologies

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20160213026538N3

Enrollment

Registered

2018-11-18

Start date

2018-09-23

Completion date

Unknown

Last updated

2019-01-14

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

Conditions

marginal adaptation of single unit restorations.

Interventions

Intervention 1: Intervention group: application of metal ceramic crowns fabricated by CAD/Milling technique. Intervention 2: Intervention group: application of metal ceramic crowns fabricated by CAD/C

Eligibility

Sex/Gender

All

Inclusion criteria

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

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

Design outcomes

Primary

Measure	Time frame
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.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactMahsa Samavati

Kermanshah University of Medical Sciences

m93samavati@gmail.com+98 83 3845 0641

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026