Observational Study Evaluating Zirconia Dental Implants and Screw Retained Implant Crowns for Metal-free Single Tooth Replacement
概览
- 阶段
- 不适用
- 干预措施
- 未指定
- 疾病 / 适应症
- Partial-edentulism
- 发起方
- University of Bern
- 入组人数
- 14
- 试验地点
- 2
- 主要终点
- Survival Rate
- 状态
- 进行中（未招募）
- 最后更新
- 15天前
概览
简要总结
First, the surgical insertion of a ceramic (zirconia) dental implant will be performed in a single-tooth gap according to current state-of-the-art protocols. After a 3-months healing phase, a ceramic tooth replacement (a.k.a. implant crown) will be screw-retained on the implant and will be ready for full chewing, aesthetic and speech function.
详细描述
Surgery Implant placement will be performed according to a standardized, well-documented surgical protocol considered internationally as state-of-the art therapy for titanium implants since decades (Buser \& von Arx 2000, Buser et al. 2004). In summary, an osteotomy will be performed in the edentulous bone under local anaesthesia and after the elevation of a full-thickness mucoperiosteal flap. The screw-shaped implant will then be inserted into the osteotomy. Particular emphasis will be set on risk minimization for adjacent anatomical structures (e.g. nerves, adjacent teeth), on sufficient primary implant stability, on circular embedding in \> 1 mm thick bone walls and on correct three-dimensional implant positioning. In cases with insufficient bone volume, guided bone regeneration (GBR) will be performed using autogenous bone chips from the adjacent area, well-documented bovine bone mineral and resorbable porcine collagen membranes. The flaps will then be sutured around the implant healing cap (non-submerged healing). Primary flap closure will be preferred in cases with GBR (submerged healing). 12 ± 2 weeks after placement, submerged implants will be uncovered under local anaesthesia, then the osseointegration of the implants will be verified clinically and radiographically, and impressions will be taken. Restoration Restoration in group A (tooth replacement in FDI positions 14 - 24): fixed implant-supported provisional for 3 months, then final restoration with all-ceramic screw-retained single implant-supported crown (abutment made of zirconium dioxide and crown finalized with hand-build up ceramic veneering material) Restoration in group B (tooth replacement in all other positions): all-ceramic screw-retained single implant-supported crown (abutment made of zirconium dioxide and monolithic lithium disilicate ceramic crown.
研究者
入排标准
入选标准
- •(site level):
- •partial edentulism (any FDI position between 17 and 47)
- •healed extraction site (type 2, 3 or 4 implant placement) or native bone
- •opposing dentition: natural teeth, fixed or removable restoration
排除标准
- •(site level):
- •inadequate ridge or gap dimensions for the test device (simultaneous bone augmentation allowed)
- •lack of primary stability of the implant
- •Inclusion criteria (patient level):
- •self-referred or on purpose referred patient requiring a metal-free, all-ceramic implant therapy
- •age ≥18 years and ≤ 80
- •capable of providing written informed consent and compliance to the protocol
- •physical status PS1 and PS2 (American Society of Anesthesiologists).
- •Exclusion criteria (patient level):
- •pregnancy or lactation
结局指标
主要结局
Survival Rate
时间窗: 12 months
How many implants are still in function
次要结局
- Success Rate(10 years)