Investigating the Accuracy of Conventional vs Digital Impressions and Conventional vs 3D Fabricated Casts in Capturing the Emergence Profile Around Maxillary Anterior Single Implant-supported Crowns
试验速览
- 阶段
- 不适用
- 入组人数
- 15
- 试验地点
- 1
- 主要终点
- 3D RMS - root mean square difference
研究概览
简要总结
This study compares conventional impression and cast fabrication to direct/indirect digital scannig and 3D printed casts regarding their accuracy in replicating the peri-implant emergence profile of single implants in the maxillary anterior region (FDI #15-25).
详细描述
Correct design of the peri-implant emergence profile (EP) is crucial for maintaining the health of the supracrestal complex and long-term success of the implant implant-prosthodontics. After its formation with a provisional restoration, its shape needs to be transferred to the final restoration via conventional elastomeric or digital (direct/indirect) impression taking.
Our aims are to investigate around maxillary anterior single implants in patients with thick gingival phenotype:
- the accuracy of direct digital impression vs indirect digital impression vs conventional elastomeric impression in capturing the EP and implant position
- the accuracy of 3D printed cast with conventional gingival mask vs conventional epoxy-resin cast with gingival mask in replicating the EP and implant position
- the amount of soft tissue collapse at 0,2,10,20 minutes following the removal of the provisional restoration in case of direct EP scanning
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Adult above 18 yo
- •No systematic deseases
- •Good oral hygene (FMPS < 25%)
- •Stable occlusion
- •Thick phenotype
- •Single missing maxilary anterior (FDI #15-25 position) tooth replaced with osseointegrated bone level impant
- •Correctly formed soft tissue with CAD/CAM temporary abutment for min. 3 months
- •Neighbouring teeth in place and in good condition
- •Patient voluntarily accepts and signs the patient leaflets for the trial
排除标准
- •Active periodontitis
- •Peri-implant inflammation
研究组 & 干预措施
conventional cast
conventional impression with elastomer (silicon), from which a high-precision epoxi-resin cast with gingival mask will be created
干预措施: conventional impresion and cast (Procedure)
indirect digital impression and 3D printed cast
the provisional restoration will be scanned with intraoral scanner extraorally, based on which a virtual model will be created, from which a 3D printed cast will be created with manually fabricated gingival mask based on the provisional restoration
干预措施: indirect digital impression and 3D printed cast (Procedure)
direct digital impression
the emergence profile will be directly scanned with intraoral scanner at 0, 2, 10, and 20 minutes after removing the provisional restoration
干预措施: direct digital impression (Procedure)
结局指标
主要结局
3D RMS - root mean square difference
时间窗: at impression taking, 0,2,10,20 mins
The absolute mean deviation between the emergence profiles replicated with different impression techniques along the whole surface of the EP
次要结局
- Patient reported outome measures - evaluation of the impression method(at the end of each session of the digital and conventional impression taking)
- Linear horizontal soft tissue change(at impression taking, 0,2,10,20 mins)
- 2D RMS - root mean square difference(at impression taking, 0,2,10,20 mins)
- Linear vertical soft tissue change(at impression taking, 0,2,10,20 mins)