Immediate Loading With Provisional Prosthetic Restoration by Means of One Abutment at One Time and Temporary Abutment in the Posterior Mandible Without Bone Augmentation
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Periimplant marginal bone loss
研究概览
简要总结
This will be a prospective, randomized, controlled, single center clinical trial with
1 year enrollment period, surgical and prosthetic rehabilitation with 1-year post-loading follow-up. A total of 2.0 years of study duration The primary objective is to compare peri-implant hard and soft tissue changes between single implants placed in the posterior mandible and immediately loaded either with definitive (one-time) or provisional abutment.
详细描述
Hard tissue contour changes will be assessed using standardized two-dimensional intra-oral radiographs and partial small field of view three-dimensional cone beam CT scans. Soft tissue contour changes will be assessed using superimposition of dental digital models. Inflammatory soft tissue reactions will be evaluated by measurement of respective cytokines' levels.A quantitative evaluation of total bacteria amount of the peri-implant samples.
Secondary objectives of this study will be to estimate total bacterial amount (quantitative real-time polymerase chain reaction - qRT-PCR).
Bleeding on probing (BoP), full mouth oral hygiene index, periodontal pocket depth (PPD) and keratinized tissue width will also be evaluated.
Indication: Patients with need of at least two implants (one per side) in the premolar or molar region in the mandible, bilaterally.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Screening
- 盲法
- None
入排标准
- 年龄范围
- 25 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Minimum age of 25 years
- •In need of a one or two implants.
- •Healed site (healed site defined by restored gingiva, free of inflammation and scar tissue , with a keratinized band of 3mm from crest to muco-gingival junction, and sufficient osseous architecture to receive an implant with a minimal diameter of 3.5 mm).
- •Mandible second premolar or molar region.
- •At least one neighboring tooth to be present.
- •Absence of visible active periapical or periodontal inflammation.
- •Adequate oral hygiene: PI< 20%, BoP< 20%.
- •Sufficient occlusal units mesial or distal and antagonizing, including the diastema to be restored: 4 occlusal units.
排除标准
- •Medical condition that contraindicates surgery: ASA -score ≥ III
- •History of radiotherapy in the head and neck region.
- •History of Bisphosphonate medication.
- •Medium smokers ≥ 10 cigarettes per day.
- •Patients unwilling or incapable of understanding and signing the informed consent.
- •Active caries.
- •Presence of inflammation expressed by PPD >4mm and BoP on adjacent teeth.
- •Active periapical radiolucency or root canal treatment performed < 4 months previous to planned implant insertion on a neighboring tooth to future implant.
- •Insufficient restorative space.
- •Interocclusal plane distance < 20mm at planed implant position.
研究组 & 干预措施
immediate loading
Immediate loading of implants by means of one definitive abutment on one side and temporary abutment on the other side of the posterior mandible restored by provisional crown-split mouth design
干预措施: immediate loading of implants (Other)
结局指标
主要结局
Periimplant marginal bone loss
时间窗: 12 months
Hard tissue changes will be analyzed and followed up at 3, 6 and 12 months by captured intraoral radiographs using a customized radiographic holder. The following landmarks will be measured in order to assess bone remodelling around implants * Mesial distance in mm from first bone to implant contact to implant shoulder (vertical line); * Distal distance in mm from first bone to implant contact to implant shoulder (vertical line) after implant placement.
次要结局
未报告次要终点
研究者
Ana Todorovic
Principal Investigator
University of Belgrade