Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
Int J Prosthodont. 2013 May-Jun;26(3):244-9. doi: 10.11607/ijp.3044.
The aim of this study was to compare the effects of immediate loading (IL) and delayed loading (DL) on peri-implant crestal bone loss around maxillary implants after long-term functioning.
A retrospective chart review was conducted to assess the outcomes of 110 tapered, multithreaded implants placed for the treatment of one or more missing and/or unsalvageable teeth in the maxilla of 23 patients. Implants were assigned to either the DL or IL database according to loading time. Marginal bone changes were calculated using standardized radiographs taken at implant placement (baseline) and during annual follow-ups.
One implant failed in the DL group. After a mean follow-up of 111 months in the DL group and 119 months in the IL group, cumulative implant survival was 99.09% (DL = 98.11%, IL = 100%). No observable bone loss was evident in 83.49% of the surviving implants. Cumulative success rates were 100% for the IL group and 98.11% for the DL group.
Immediately loaded maxillary implants showed long-term results comparable to delayed loaded maxillary implants.
本研究旨在比较上颌种植体在长期功能后即刻负载（IL）和延迟负载（DL）对种植体周围边缘骨吸收的影响。
对 23 名患者的上颌缺失或不可挽救的 1 颗或多颗牙齿的治疗中植入的 110 个锥形多线螺纹种植体的结果进行回顾性图表分析。根据加载时间将种植体分为 DL 或 IL 数据库。在种植体植入（基线）和每年随访时使用标准化 X 光片计算边缘骨变化。
DL 组有 1 个种植体失败。在 DL 组的平均随访 111 个月和 IL 组的平均随访 119 个月后，累积种植体存活率为 99.09%（DL = 98.11%，IL = 100%）。在存活的种植体中，83.49%无明显骨吸收。IL 组的累积成功率为 100%，DL 组为 98.11%。
上颌即刻负载种植体具有与上颌延迟负载种植体相当的长期效果。
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