Slot Wim, Raghoebar Gerry M, Vissink Arjan, Meijer Henny J A
Research associate, Department of Fixed and Removable Prosthodontics, Dental School, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands Professor, Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands Professor, Department of Fixed and Removable Prosthodontics, Dental School, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
Clin Implant Dent Relat Res. 2014 Feb;16(1):51-61. doi: 10.1111/j.1708-8208.2012.00459.x. Epub 2012 May 11.
For maxillary overdenture therapy, treatment guidelines are missing. There is a need for longitudinal studies.
The purpose of this 1-year prospective case series study was to assess the treatment outcome of maxillary overdentures supported by six dental implants opposed by natural antagonistic teeth in the mandible.
Fifty patients were treated with a maxillary overdenture supported by six dental implants, either placed in the anterior region (n = 25 patients) or in the posterior region (n = 25 patients). Items of evaluation were the following: survival of implants, condition of hard and soft peri-implant tissues, and patients' satisfaction.
One-year implant survival rate was 98% in the anterior group and 99.3% in the posterior group. Mean radiographic bone loss in the anterior and posterior groups after 1 year of loading was 0.22 and 0.50 mm, respectively. Mean scores for plaque, calculus, gingiva, bleeding, and pocket probing depth were low, and patients' satisfaction was high, with no differences between the groups.
Six dental implants placed in either the anterior region or the posterior region of the edentulous maxilla, connected with a bar, and opposed by antagonistic teeth in the mandible supply a proper base for the support of an overdenture.
对于上颌覆盖义齿治疗，缺少治疗指南。需要进行纵向研究。
这项为期1年的前瞻性病例系列研究的目的是评估由六颗牙种植体支持、下颌有天然对颌牙的上颌覆盖义齿的治疗效果。
50例患者接受了由六颗牙种植体支持的上颌覆盖义齿治疗，种植体分别植入前部区域（25例患者）或后部区域（25例患者）。评估项目如下：种植体的存留情况、种植体周围软硬组织状况以及患者满意度。
前部组1年种植体存留率为98%，后部组为99.3%。加载1年后，前部组和后部组的平均影像学骨吸收分别为0.22 mm和0.50 mm。菌斑、牙石、牙龈、出血和牙周袋探诊深度的平均评分较低，患者满意度较高，两组之间无差异。
在上颌无牙区的前部或后部植入六颗牙种植体，用杆连接，并与下颌的对颌牙相对，可为覆盖义齿提供合适的支持基础。
