Accuracy of Digital and Conventional Impression Techniques for Maxillary Full Arch Screw Retained Hybrid Prosthesis
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 12
- 试验地点
- 2
- 主要终点
- accuracy of impression technique
研究概览
简要总结
evaluation and comparison of the accuracy of conventional and digital impression for full arch screw retained prosthesis for edentulous maxilla.
详细描述
Each patient received 6 implants in the maxillary ridge (widely distributed across the arch) in the following positions: central incisors, canines/first premolar teeth and first molar teeth aided by surgical stent. then each patient received 2 types of impression techniques Technique 1 :conventional impression conventional open tray impression technique with splinted transfers using vinylpolysiloxane and Technique2 : Digital impression taken using original scan bodies torqued to the implants .three dimensional accuracy of impression techniques was evaluated using linear measurements and 3D deviation between the two techniques was measured.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 50 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •The patients were selected according to the following inclusion criteria:
- •Completely edentulous maxillary and mandibular ridges
- •Healthy ridge covered by normal oral mucosa and free from any ridge flabbiness.
- •All of the patients were dissatisfied with the retention and stability of their maxillary conventional dentures and expressed a strong desire for a more stable prosthesis.
- •Sufficient bone quantity and quality in the front and posterior maxillary regions, as determined by preoperative CBCT, to accommodate six implants with a diameter of at least 3.5 mm and a length of at least 10 mm.
- •Enough restorative space (from the mucosa covering the crest of the maxillary residual ridge to the occlusal plane) to allow the fixed prosthesis to be constructed ,preliminary jaw relationship revealed this.
- •It's been at least a year since the last extraction.
排除标准
- •Systemic diseases that may alter tissue response to implantation and affects osseointegration (radiation, diabetes, osteoporosis, bleeding disorders or hepatic patients)
- •Long term immunosuppressive and corticosteroid drug therapy.
- •Patient with abnormal habits as clenching and bruxism.
- •Smoking patients.
- •Patients with problems in TMJ.
- •Neuromuscular diseases.
结局指标
主要结局
accuracy of impression technique
时间窗: immediately after the intervention/procedure
deviation measurements digitally
次要结局
- passivity of final restoration(immediately after the intervention/procedure)
研究者
Gilan Altonbary
associate professor
Mansoura University