Busenlechner Dieter, Mailath-Pokorny Georg, Haas Robert, Fürhauser Rudolf, Eder Carina, Pommer Bernhard, Watzek Georg
Int J Oral Maxillofac Implants. 2016 Jul-Aug;31(4):900-5. doi: 10.11607/jomi.4325.
To compare long-term survival and marginal bone loss of late interantral implants in the nonaugmented edentulous maxilla subjected to immediate vs delayed loading.
One hundred twenty-two edentulous patients with implants in native, healed jawbone were subjected to either immediate loading (179 implants) or delayed loading (403 implants) of their four to six interantral implants (part I of 362 graftless maxillary cross-arch rehabilitations performed in the years 2004 to 2013). Kaplan-Meier survival estimates were computed, and marginal bone loss was evaluated in a stratified random sample of 20 patients per group.
Fifteen of 582 implants failed within the mean observation period of 4.7 years, and no difference in 8-year survival estimates could be seen between immediate (98.3% [95% CI: 96.4-100.0]) and delayed (96.7% [95% CI: 94.7-98.6]) loading protocols (P = .370). Mean marginal bone resorption following implant insertion did not differ significantly between the groups (1.1 ± 1.3 mm vs 1.4 ± 1.3 mm, P = .490).
Immediate loading of interantral implants in the nonaugmented edentulous maxilla yields favorable results comparable to delayed loading and may be considered to shorten periods of removable provisional prostheses in maxillary edentulism.
比较在上颌无牙颌未植骨区域植入窦内种植体后即刻负重与延期负重的长期生存率和边缘骨吸收情况。
122例在天然愈合颌骨内植入种植体的无牙颌患者，其4至6枚窦内种植体采用即刻负重（179枚种植体）或延期负重（403枚种植体）（这是2004年至2013年进行的362例无植骨上颌跨牙弓修复的第一部分）。计算Kaplan-Meier生存估计值，并在每组20例患者的分层随机样本中评估边缘骨吸收情况。
582枚种植体中有15枚在平均4.7年的观察期内失败，即刻负重（98.3% [95% CI：96.4 - 100.0]）和延期负重（96.7% [95% CI：94.7 - 98.6]）方案在8年生存率估计上无差异（P = 0.370）。种植体植入后的平均边缘骨吸收在两组间无显著差异（1.1±1.3 mm对1.4±1.3 mm，P = 0.490）。
在上颌无牙颌未植骨区域植入窦内种植体后即刻负重可产生与延期负重相当的良好效果，可考虑用于缩短上颌无牙颌患者可摘临时 prosthesis 的使用时间。
