Immediate placement refers to the placement of an implant into a tooth socket at the time of extraction; early placement refers to the placement of an implant after substantial gingival healing, but before any clinically significant bone fill occurs within the socket. This study evaluated the success and survival rates of implants following immediate and early placement. 50 implants were placed in 36 patients. 26 immediate (group I) and 24 early placements (group II) were performed. Pain or tenderness with function, mobility, radiographic bone loss from initial surgery and exudate history were evaluated. Mean vertical bone loss in the immediate placement group was 0.55 mm and 0.80 mm in the early placement group. The survival rate for the immediate placement group was 96.16% with 51.6 months follow-up and in the early placement group was 100% with 61.9 months follow-up. The results of this study suggest that although the success and survival rates of early placed implants were a little higher and the follow up period was longer than immediately placed implants, the difference was not remarkable. In conclusion, both implant insertion techniques are safe and reliable procedures with considerably high survival rates.

译文

立即放置是指在拔牙时将植入物放置在牙槽中; 早期放置是指在牙龈实质性愈合后但在牙槽内发生任何临床上重要的骨填充之前放置植入物。这项研究评估了立即和早期放置后植入物的成功率和存活率。在36例患者中放置了50个植入物。进行了26次即时放置 (I组) 和24次早期放置 (II组)。评估了疼痛或压痛的功能,活动度,初始手术引起的影像学骨丢失和渗出史。立即放置组的平均垂直骨丢失是0.55毫米的,而早期放置组的平均垂直骨丢失是0.80毫米的。立即放置组的生存率96.16% 为51.6个月的随访,而早期放置组的生存率100% 为61.9个月的随访。这项研究的结果表明,尽管早期放置的植入物的成功率和存活率比立即放置的植入物高一些,并且随访时间更长,但差异并不显着。总之,两种植入物插入技术都是安全可靠的程序,存活率很高。

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