摘要
目的行即刻种植即刻修复,测量种植体的初期稳定性,观察骨愈合、骨改建期间稳定性的变化,进行组织学和组织形态学分析。方法选择杂种狗5只,拔除下颌前磨牙,即刻将五种不同长度和直径(4.1mm×8.5mm、10mm、11.5mm、13mm及4.8mm×8.5mm)的种植体植入拔牙窝,即刻修复牙冠,分别于术后1、2、4、8及12周处死。种植后及处死前分别用Periotest和共振频率分析测量种植体的稳定性,取标本行组织形态学分析。结果在即刻种植后,ISQ的平均值为66.47±3.85,PTV的平均值为-3.95±1.45。术后第一周ISQ呈下降趋势,而PTV呈上升趋势;第二到十二周ISQ和PTV分别呈上升及下降趋势。骨—种植体接触率和种植体周围骨面积呈类似变化。结论即刻种植时,选择一个和牙槽窝直径相近的种植体比单纯增加种植体的长度更为重要;具有良好的初期稳定性,即刻种植即刻修复不影响种植体的骨整合;即刻种植即刻修复术后1周内,种植体的稳定度会降低,2周后随着种植体骨界面上骨生成及骨改建,种植体的稳定度逐渐升高。
Objective To access the change of stability of implant during healing and bone remolding, as detected by Periotest and RFA in an immediate - immediate surgical procedure. Methods Five kinds of different length fixtures （4.1ram× 8.5mm, 10mm, 11.5mm, 13mm and 4.8mm× 8.5mm） were inserted and restorated immediately in 5 canines＇ mandibles after premolars were extracted, the animals were sacrificed at postoperation 1, 2, 4, 8 and 12 weeks. At baseline and sacrifice, ISQ by RFA and PTV by Periotest were measured to evaluate stability of fixtures. One longitudinal ground sections were made for each implant and analyzed under light microscopy for histomorphometry. Results At baseline, ISQ = 66.47±3.85, PTV = - 3.95 ± 1.45. After loading, ISQ was decreased and PTV was increased in the 1st week, from 2nd week to 12th week after loading, ISQ and PTV were gradually increased and decreased respectively. The change of BIC （bone- implant contact） and BA （mineralized bone area） were similar. Conclusion After immediate - immediate procedure, in the 1st week, the stability of implant is decreased. From the 2nd week to the 12th week post - operation, it begins to recover because of bone formation, remodeling, and an increased stiffness at the bone- implant interface.
出处
《现代口腔医学杂志》
CAS
CSCD
北大核心
2007年第2期149-152,共4页
Journal of Modern Stomatology
关键词
即刻种植
即刻修复
稳定性
Immediate implant Immediate restoration Stability
