Fourteen-year Evaluation of Posterior Zirconia-based Three-unit Fixed Dental Prostheses. A Prospective Clinical Study of All Ceramic Prosthesis
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 发起方
- 入组人数
- 37
- 主要终点
- Survival and success rate of zirconia FDPs
研究概览
简要总结
The main objective of the present prospective study is to evaluate the effectiveness of posterior zirconia FDPs after 14 years of function.
详细描述
thirty-seven patients needing to replace either premolars or molars were involved and 48 3-unit zirconia-based FDPs were fabricated. Patients included in the present clinical study met specific inclusion criteria and clinical procedures were standardized.
Frameworks with a 9 mm2 cross section of the connectors and 0.6 mm minimum thickness of the retainers were made by means of Computer Aided Design/Computer Assisted Manufacturing. A resin cement was used to lute the restorations. The patients were recalled after 6 and 12 months and then yearly up to a total follow-up of 14 years. The United States Public Health Service criteria were used in order to examine technical and esthetic outcomes. Success and survival rates
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Prospective
入排标准
- 年龄范围
- 21 Years 至 68 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •good general health;
- •ASA I or ASA II according to the American Society of Anesthesiologists;
- •good periodontal health;
- •Angle class I occlusal relationship;
- •minimum of 20 teeth;
- •good oral hygiene;
- •no evident signs of occlusal parafunctions and/or temporo-mandibular disorders.
- •Moreover, the abutment teeth had to fulfill the following inclusion criteria:
- •periodontal health (absence of tooth mobility, absence of furcation involvement);
- •proper positioning in the dental arch (tooth axes adequate for a FDP);
- •sufficient occlusal-cervical height of the clinical crown (≥4 mm) for the retention of a FDP;
- •vital or endodontically treated to a clinically sound state;
- •opposing natural teeth or fixed prostheses.
排除标准
- •subjects preferring implant-supported prostheses;
- •high caries activity;
- •occlusal-gingival height of the abutment teeth <4 mm;
- •reduced interocclusal distance or supraerupted opposing teeth;
- •unfavorable crown-to-root ratio;
- •severe wear facets, clenching, bruxism;
- •presence of removable partial dentures;
- •pregnancy or lactation.
结局指标
主要结局
Survival and success rate of zirconia FDPs
时间窗: 14 years
The 14-year cumulative survival rate of the zirconia FDPs was calculated by means of Kaplan-Meier analysis.
次要结局
- Technical and aesthetic outcomes(14 years)
研究者
Fernando Zarone
Professor
Federico II University