Comparative evaluation of occlusal wear of computer designed Polymethyl Methacrylate (PMMA) provisional crowns fabricated by milling and 3D printing -A split mouth randomized trial
试验速览
- 阶段
- 2 期
- 状态
- 尚未招募
- 发起方
- 入组人数
- 11
- 试验地点
- 1
- 主要终点
- To evaluate the occlusal wear of computer designed polymethyl methacrylate based milled and 3D printed provisional crowns with natural antagonist teeth in micrometers
研究概览
简要总结
Wear is the gradual removal of material from surfaces as a result of mechanical or chemical injuries, it can occur through 3 processes erosion attrition and abrasion. Literature is filled with studies on wearcharacteristics of various definitive restorative materials. There is scarcityof in vivo study investigating the wear of PMMA based provisional crowns inhuman dentition. There is in vivo study related to wear resistance of CAD CAMprovisional implant restoration. There is in vitro study related to wear ofmilled and 3D printed veneers. There is lack of a clinical study comparingthe occlusal wear of computer designed Polymethyl Methacrylate provisionalcrowns made by milling and 3D printing. The provisional crowns set the stagefor a definitive crown. Occlusal stability should then be maintained prior togiving a definitive crown. Therefore this study is planned to compare theocclusal wear of computer designed PMMA provisional crown fabricated by millingand 3D printing.
研究设计
- 研究类型
- Interventional
- 分配方式
- Computer generated randomization
- 盲法
- Outcome Assessor Blinded
入排标准
- 年龄范围
- 25.00 Year(s) 至 50.00 Year(s)（—）
- 性别
- All
入选标准
- •Patients requiring bilateral posterior mandibular complete crowns with normal periapical architecture.
- •Teeth restorable with a minimum crown to root ratio of at least 1:
- •Teeth with healthy opposing natural teeth.
- •Good oral hygiene and periodontal status.
- •Full complement of teeth (excluding 3rd molars).
- •Patients who will be available for the required follow up period.
- •Patients giving positive informed consent 8)Age group 25-50 years.
排除标准
- •Patients with developmental defects of enamel and dentin.
- •Patients who have undergone re-RCT ( root canal treatment ) in mandibular molars.
- •Parafunctional habits like bruxism, clenching.
- •Temporomandibular joint disorders.
- •Fluorosis, calcium metabolic disorders, osteoporosis.
- •Opposing teeth with caries or wear 8)Malocclusion 9)Systemic diseases 10)Smoking.
结局指标
主要结局
To evaluate the occlusal wear of computer designed polymethyl methacrylate based milled and 3D printed provisional crowns with natural antagonist teeth in micrometers
时间窗: 3 months after cementation of crown.
次要结局
- To evaluate the occlusal wear of natural antagonist enamel with computer designed polymethyl methacrylate based milled and 3D printed provisional crowns in micrometers.(3 months after cementation.)