A Retrospective Analysis of Complications and Survival of Teeth Restored With Single Crowns Following Crown Lengthening
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 81
- 试验地点
- 1
- 主要终点
- Teeth survival
研究概览
简要总结
The ultimate goal for every dental restoration is to restore and maintain the dentition's functionality along with preserving periodontal support. The long-term success of a restored tooth depends on the retention of a healthy periodontium. When restoring a short clinical crown, the clinician may contemplate placement of subgingival margin to gain additional length for retention purposes. Thus, crown lengthening procedure is performed to gain access to the natural tooth structure while maintaining the periodontal health and to increase the retention of the restoration. A full crown restoration is needed to protect the compromised tooth from fracture. The prognosis of these teeth depends on the long-term success rate of each component of the overall treatment and the follow up maintenance.
In order to assist dentists to make an evidence-based decision during treatment planning, this retrospective study aims to investigate the complications and survival rate of the teeth receiving crown following crown lengthening.
详细描述
The aim of this retrospective study was to evaluate the survival rates and complications of structurally compromised teeth restored with full-coverage crowns following crown lengthening procedure (CLP), in a postgraduate dental setting.
In this retrospective study the records of patients who received surgical CLP prior to receiving full coverage crowns at X hospital between January 2011 to January 2021 were obtained and reviewed by A.AH and F.AR for possible inclusion in the study. Retrospective data were collected manually from digital records of registered patients (Dental4windows, Centaur Software Development Co Pty Ltd., Australia). All personal information is de-identified and securely stored with a study code number. The data were then organized into categories based on a pre-determined form for single crowns with CLP .
The calculation of sample size was based on a 10-year survival rate of 78.4% tooth preservation after crown lengthening procedure and restorative treatment in department of periodontics and oral medicine at the school of dentistry of the university of Michigan (where p is the prevalence of crown after crown lengthening, d is the precision of the estimate, and z_(α/2)^2 is the quartile of the 95% confidence interval).
Using the above equation and data from the aforementioned study, the sample size needed is determined to be 260 teeth.
Statistical Analysis The collected data will be transferred to Statistical Package for Social Sciences (SPSS) for Windows (IBM- SPSS) version 25.0 (SPSS Inc., Chicago, IL, USA) for statistical analysis.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 18 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients were included in the study if they met all the following conditions:
- •Setting and Providers: The tooth received crown lengthening surgery (CLP) performed by postgraduate residents in Periodontology and subsequent definitive crown placement by postgraduate residents in Prosthodontics at X Hospital.
- •Patient Characteristics:
- •Age between 18 and 70 years at the time of the CLP. Able and willing to participate, with written informed consent obtained.
- •- Follow-up and Documentation Requirements: A minimum of 12 months had elapsed since placement of the definitive crown at the time of data collection. Baseline intraoral radiographs available prior to CLP to document periodontal and structural condition.
- •- Tooth-Level Clinical Criteria: Tooth mobility not exceeding Miller Class I at baseline. A planned or anticipated crown-root ratio ≥1:1 following CLP based on clinical and radiographic evaluation.
排除标准
- •Patients were excluded if any of the following conditions applied:
- •Procedure Purpose or Type: CLP performed exclusively for aesthetic indications.
- •Cases involving intentional endodontic treatment and CLP performed solely to correct supra-eruption for prosthetic clearance (i.e., without biological indication).
- •Baseline Dental and Periodontal Condition:
- •Teeth exhibiting furcation involvement at baseline. Mobility greater than Miller Class I preoperatively.
- •Teeth functioning as abutments for fixed dental prostheses, due to altered biomechanical loading.
- •Treatment Completion and Record Accuracy:
- •Absence or incompleteness of clinical or radiographic documentation prior to CLP. Incomplete endodontic, periodontal, or definitive restorative treatment at the time of review.
- •The final restoration was not a full-coverage definitive crown.
- •Follow-up and Participant Availability:
- •Follow-up duration less than 12 months after crown placement. Patients who declined participation or could not be contacted for consent.
结局指标
主要结局
Teeth survival
时间窗: 1 year or more postintervention
tooth survival was defined as tooth remaining in situ with or without complications
次要结局
未报告次要终点
研究者
Maanas Shah
Assistant Professor
Mohammed Bin Rashid University of Medicine and Health Sciences