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Long-Term Periodontal Tissue Changes Associated With Metal-Ceramic Crowns: An 8-Year Split-Mouth Study

NCT07500636 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 32

Last updated 2026-04-03

No results posted yet for this study

Summary

The goal of this clinical trial is to to evaluate the periodontal condition around metal-ceramic crown. The main question to be answered is: whether the metal-ceramic crown is the cause of gum changes? The study offers to involve patients who receive single metal-ceramic crown and have kept the same tooth intact on the other side of the mouth.

The condition of the gums around the crown will be compared with the corresponding natural teeth on the oposite side of the mouth. Clinical parameters such as plaque accumulation, bleeding on probing, periodontal pocket depth and gingival recession will be evaluated. All procedures are part of routine dental examination.

Participants:

will be invited for gingival examination 3 months after receiving the metal-ceramic crown, will receive a routine hygiene instruction, will be invited for gingival re-examination after 8 years.

Conditions

  • Gingival Health
  • Metal-Ceramic Restorations

Interventions

DEVICE

Metal-ceramic crown

The preparation and manufacturing of the MC crown was performed following a standardized clinical and laboratory protocol. Final impression was taken with a one-step technique in a standard tray. All crowns were manufactured in the same dental laboratory. The metal frameworks were fabricated in cobalt-chromium using the lost-wax technique and then veneered with ceramic using a layering technique. All restorations were cemented with zinc phosphate cement. The examination was performed under a dental operating light, using a flat-surfaced intra-oral mirror and a dental/periodontal probe. Both the restored tooth (test) and the contralateral natural tooth (control) were examined. Records were made for the gingival condition using the Silness \& Loe gingival index. Gingival pocket depth measured in millimeters, gingival recession was measured as distance in millimeters (mm) from the cementoenamel junction to the gingival margin.

Sponsors & Collaborators

  • Riga Stradins University

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
20 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2015-10-31
Primary Completion
2016-09-30
Completion
2024-09-30

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07500636 on ClinicalTrials.gov