即刻负重与延迟负重对All-on-4治疗效果的影响：一项前瞻性研究。
Effects of Immediate and Delayed Loading on the Outcomes of All-on-4 Treatment: A Prospective Study.
作者信息
Najafi Hossein, Siadat Hakimeh, Akbari Solmaz, Rokn Amirreza
机构信息
Prosthodontist, Post Doc Student, Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Professor, Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Prosthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
出版信息
J Dent (Tehran). 2016 Nov;13(6):415-422.
OBJECTIVES
The purpose of this study was to compare the outcomes of immediate and delayed rehabilitation of edentulous jaws by means of two straight and two tilted implants after one year of function.
MATERIALS AND METHODS
Thirty consecutive patients (16 males, 14 females) were enrolled in this study. Two anterior straight and two posterior tilted implants were placed in each patient. According to the implant insertion torque and the need for bone grafting, implants were loaded immediately (at 72 hours) or delayed (after four months) using a fixed metal resin prosthesis.
RESULTS
One axial implant failed in the delayed group after one year of loading, resulting in cumulative implant survival rate of 99.3%. The mean marginal bone loss was 0.84mm. No significant difference was found between axial and tilted implants in the two groups (P>0.05).
CONCLUSIONS
Based on the results, immediate or delayed fabrication of final prosthesis on two tilted and two axial implants did not result in significant differences in survival rates or marginal bone loss.
目的
本研究的目的是比较在功能使用一年后，通过两颗直形种植体和两颗倾斜种植体对无牙颌进行即刻修复和延期修复的效果。
材料与方法
连续纳入30例患者（16例男性，14例女性）。每位患者植入两颗前部直形种植体和两颗后部倾斜种植体。根据种植体植入扭矩和骨移植需求，使用固定金属树脂假体即刻（72小时）或延期（四个月后）加载种植体。
结果
延期组在加载一年后有一枚轴向种植体失败，种植体累积存留率为99.3%。平均边缘骨吸收为0.84mm。两组中轴向种植体和倾斜种植体之间未发现显著差异（P>0.05）。
结论
基于结果，在两颗倾斜种植体和两颗轴向种植体上即刻或延期制作最终修复体在存留率或边缘骨吸收方面未产生显著差异。
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