Evaluation of the effect of gingival retraction with laser and retraction cord on gingival recession and marginal adaptation in crowns

Evaluation of the effect of gingival retraction with laser and retraction cord on marginal adaptation and gingival recession in full ceramic crowns for first premolar of maxilla – a clinical trial study

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20220220054075N1

Enrollment

Registered

2022-03-16

Start date

2022-02-26

Completion date

Unknown

Last updated

2022-04-04

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

Conditions

Marginal mismatch.

Interventions

Intervention 1: Intervention group: After preparation the tooth for molding the gums, we retraction the gingiva with retraction cord. Intervention 2: Intervention group: After preparation the tooth fo

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Good general health(The patient has no systemic disease that can affect clinical outcomes) Periodontal health(Plaque index and BOP should be below 20% before prosthetic treatment) There is a good keratinized gum around the abutment tooth (gingival biotype is thick). It should not have obvious signs and symptoms of bruxism or clenching abutment teeth need reconstruction Non-living abutment teeth that have a positive long-term prognosis based on clinical evaluations and radiology Non-living abutment teeth that have a positive long-term prognosis based on clinical evaluations and radiology The teeth have sufficient preparation length to ensure retention and resistance shapes The patient is willing to participate in our study and sign the consent form.

Exclusion criteria

Exclusion criteria: The patient is unwilling or unable to observe adequate oral hygiene (index plate and BOP should be below 20%). abutment teeth have clinical signs. Have loose teeth of second or more degrees. Teeth need periodontal surgery before preparing the crown. Parafunctional habits Periodontitis, severe gingivitis, poor oral hygiene and high caries activity

Design outcomes

Primary

Measure	Time frame
Marginal restoration adaptation. Timepoint: before and after veneering. Method of measurement: 1-parallel Byte Wing Radiography 2- Probe 3- Silicon Replica.	—

Secondary

Measure	Time frame
Gingival recession. Timepoint: before intervention and Two weeks after veneering. Method of measurement: Digital caliper.	—

Countries

Iran (Islamic Republic of)

Contacts

Public Contactabolfazl ghodrati golzar

Kermanshah University of Medical Sciences

agh00108@gmail.com+98 83 3724 8531

Outcome results

None listed

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