An observational study in Gingival Health and Metal Ceramic Restorations, sponsored by Riga Stradins University. Enrolling by invitation at 1 site in Latvia. Open to participants aged 20 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-05-28.
Sponsored by Riga Stradins University · Observational
The goal of this observational study 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 have received 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: patients who have previously received treatment with metal-ceramic crowns and agree to undergo a gingival examination.
Riga Stradins University is the lead sponsor of 19 studies on the registry; 10 are open to participants now.
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The study included patients who attended the Department of Prosthetic Dentistry at the Rīgas Stradiņš University Institute of Stomatology for restoration of a single tooth with a metal-ceramic (MC) crown, had available patient records, responded to the invitation, and possessed a preserved, non-restored contralateral tooth to serve as a control.
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Exclusion Criteria:
Gingival Index Around Metal-Ceramic Crown and Contralateral Tooth
Records were made for the gingival condition of test tooth (metal-ceramic) and control tooth using the Silness \& Loe gingival index, scoring four sites (M, D, B, L) for each tooth. The mean value for each tooth was then calculated. Gingival index (GI) according to Silness \& Loe. Scores Description 0-Normal gingiva, 1-Mild inflammation: slight change in color, slight edema, no bleeding on probing, 2-Moderate inflammation: redness, edema, and glazing, or bleeding on probing, 3-Severe inflammation: marked redness and edema, tendency toward spontaneous bleeding.
Time frame: 8-10 Years
Gingival Pocket Depth Around Metal-Ceramic Crown and Contralateral Tooth
Gingival pocket depth measured in millimeters (mm) was assessed at 6 surfaces per tooth by inserting a dental probe between teeth and gumline and recording the distance from the gingival margin to the base of the pocket, with the deepest measurement considered.
Time frame: 8-10 Years
Gingival Recession Around Metal-Ceramic Crown and Contralateral Tooth
Gingival recession was measured as distance in millimeters (mm) from the cementoenamel junction to the gingival margin, with the greatest value recorded.
Time frame: 8-10 Years
Plan to share: Undecided — CC BY NC-ND (possible)
No publications or documents are linked to this record.
Start is estimated for May 2026; primary completion for Dec 2026, 7 months later.
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Riga Stradins University