Boven G C, Slot J W A, Raghoebar G M, Vissink A, Meijer H J A
Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Department of Fixed and Removable Prosthodontics, Dental School, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
J Oral Rehabil. 2017 Dec;44(12):988-995. doi: 10.1111/joor.12557. Epub 2017 Sep 10.
The aim of this study was to assess the 5-year treatment outcome of maxillary implant-retained overdentures opposed by natural antagonistic teeth. Fifty consecutive patients received maxillary overdentures supported by six dental implants. Implants were placed in the anterior region, if enough bone was present (n = 25 patients) Implant were placed in the posterior region if implant placement in the anterior region was not possible (n = 25 patients). Variables assessed included survival of implants, condition of hard and soft peri-implant tissues and patients' satisfaction. The five-year implant survival rate was 97·0% and 99·3%, and mean radiographic bone loss was 0·23 and 0·69 mm in the anterior and posterior group, respectively. Median scores for plaque, calculus, gingiva, bleeding and mean scores for pocket probing depth were low and stayed low. Patients' satisfaction after treatment was high in both groups. Within the limits of this 5-year study, it is concluded that six dental implants (placed in the anterior or posterior region) connected with a bar and opposed to natural antagonistic teeth result in acceptable results for clinical parameters and good outcomes for marginal bone level changes and patient satisfaction.
本研究的目的是评估上颌种植体支持的覆盖义齿与天然对颌牙相对时的5年治疗效果。连续50例患者接受了由6颗牙种植体支持的上颌覆盖义齿。如果有足够的骨量，则在前牙区植入种植体（25例患者）；如果无法在前牙区植入种植体，则在后牙区植入种植体（25例患者）。评估的变量包括种植体的存留情况、种植体周围软硬组织的状况以及患者的满意度。前牙组和后牙组的5年种植体存留率分别为97.0%和99.3%，平均影像学骨吸收分别为0.23 mm和0.69 mm。菌斑、牙石、牙龈、出血的中位数评分以及探诊深度的平均评分较低且保持在低水平。两组患者治疗后的满意度均较高。在这项为期5年的研究范围内，得出的结论是，6颗牙种植体（植入前牙区或后牙区）通过杆连接并与天然对颌牙相对，对于临床参数可产生可接受的结果，对于边缘骨水平变化和患者满意度可产生良好的效果。
