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The Effect of Fixed Dentures on Periodontal Tissues in Long-term.

2026年5月22日更新者：Elīna Bluma、Riga Stradins University

Evaluation of Periodontal Tissues Associated With Metal-Ceramic Crowns: A Split-Mouth Design

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.

研究概览

地位

邀请报名

条件

研究类型

观察性的

注册 (估计的)

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习地点

拉脱维亚
- Dzirciema Iela 20
  - Riga、Dzirciema Iela 20、拉脱维亚、LV-1007
    - RSU Institute of Stomatology

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

成人
年长者

接受健康志愿者

不

取样方法

非概率样本

研究人群

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.

描述

Inclusion Criteria:

Patients with a tooth-based metal-ceramic crown intended.
Patients with a good general state of health, i.e. do not suffer from chronic uncontrolled general illnesses (diabetes, cardiovascular diseases, oncological diseases).
Patients who have corresponding natural tooth on opposite side without a fixed dental prosthesis (crown, bridge).

Exclusion Criteria:

Pregnancy.
With local inflammation and diseases of the oral mucosa.

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

团体/队列数

队列和干预

团体/队列
Participants with metal-ceramic crowns and contralateral tooth evaluated in split-mouth design

研究衡量的是什么？

主要结果指标

结果测量	措施说明	大体时间
Gingival Index Around Metal-Ceramic Crown and Contralateral Tooth 大体时间：8-10 Years	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.	8-10 Years

次要结果测量

结果测量	措施说明	大体时间
Gingival Pocket Depth Around Metal-Ceramic Crown and Contralateral Tooth 大体时间：8-10 Years	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.	8-10 Years
Gingival Recession Around Metal-Ceramic Crown and Contralateral Tooth 大体时间：8-10 Years	Gingival recession was measured as distance in millimeters (mm) from the cementoenamel junction to the gingival margin, with the greatest value recorded.	8-10 Years

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Riga Stradins University

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (估计的)

2026年5月1日

初级完成 (估计的)

2026年12月1日

研究完成 (估计的)

2026年12月1日

研究注册日期

首次提交

2026年5月15日

首先提交符合 QC 标准的

2026年5月22日

首次发布 (实际的)

2026年5月28日

研究记录更新

最后更新发布 (实际的)