Investigation of biological oriented preparation technique

Clinical behavior of posterior fixed partial dentures with a biologically oriented preparation technique and chamfer finish line: a randomized controlled clinical trial study

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20160213026538N9

Enrollment

122

Registered

2023-12-13

Start date

2023-12-10

Completion date

Unknown

Last updated

2024-01-22

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

Conditions

Biologically oriented preparation technique.

Interventions

Intervention 1: Intervention group: Preparation of 61 posterior abutment teeth using the chamfer finish line for placement of single-unit crowns. Intervention 2: Intervention group: Preparation of 61

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: People older than 18 years People in good general health (the patient has no systemic disease that can affect the clinical results, including diabetes mellitus) Non-smokers or people who smoke less than 10 cigarettes per day Vital abutment teeth or teeth treated endodontically Good oral hygiene Periodontally healthy teeth (without signs of periapical disease and probing depth between 0 and 3 mm) A stable occlusion with a natural dentitionin the opposing arch The patient is willing to participate in our study and sign the consent form

Exclusion criteria

Exclusion criteria: People requiring an fixed partial denture more than one unit Poor oral hygiene High caries activity Active periodontal disease around the relevant teeth Parafunctional habits including bruxism Unmanaged diabetes or any other systemic disease that could compromise prosthetic treatment People receiving bisphosphonates

Design outcomes

Primary

Measure	Time frame
Gingival index. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Clinical observation.;Plaque index. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Detector material, scratching and clinical observation.;Probing depth. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Periodontal probe.;Marginal integrity. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Presence or absence of gingival recession.;Bleeding on probing. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Clinical observation.	—

Measure

Time frame

Gingival index. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Clinical observation.;Plaque index. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Detector material, scratching and clinical observation.;Probing depth. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Periodontal probe.;Marginal integrity. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Presence or absence of gingival recession.;Bleeding on probing. Timepoint: At the time of placing the veneer and three months after the treatment. Method of measurement: Clinical observation.

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactNadia Vahedi

Kermanshah University of Medical Sciences

nadiart7@yahoo.com+98 83 3724 8531

Outcome results

None listed

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