Ridge alterations following grafting of fresh extraction sockets in man. A randomized clinical trial
Ridge alterations following grafting of fresh extraction sockets in man. A randomized clinical trial
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DOI：
10.1111/clr.12366
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发表时间：
2015-04-01
影响因子：
4.3
通讯作者：
Lindhe, Jan
中科院分区：
文献类型：
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作者：
Araujo, Mauricio G.;Costa da Silva, Joao Carlos;Lindhe, Jan
目的评价Bio-Oss（(R)）胶原植入术后拔牙后牙槽嵴的尺寸变化。材料与方法本研究纳入了28例计划拔牙的上颌切牙、犬齿和前磨牙。这颗牙被小心地拔掉了。这些患者被随机分为实验组和对照组。实验组患者将Bio-Oss（(R)）胶原蛋白置于新鲜提取槽中，对照组不进行移植。拔牙后立即行ct检查（锥形束计算机断层扫描，CBCT）。4个月后，获得新的CBCT。在x线片中，(i)确定了牙槽突基部（尖）与颊嵴和腭嵴之间的距离（mm）， （ii）勾画了实验部位牙槽突的外轮廓，并确定了面积的横截面（mm(2)）。结果愈合4个月后，颊骨板高度明显降低，腭骨板高度也有一定程度的降低。在牙槽内放置生物材料未能阻止颊和腭骨壁的吸收。对照脊的横截面积减少了约25%，试验脊的横截面积减少了3%。结论在新鲜拔牙槽内放置异种移植物可明显抵消无牙部位硬组织成分的减少。
ObjectiveTo evaluate dimensional alterations of the alveolar ridge that occurred following tooth extraction at sites grafted with Bio-Oss((R)) Collagen.Material and methodsTwenty-eight subjects with maxillary incisors, canines, and premolars scheduled for extraction were included. The tooth was carefully removed. The patients were randomly assigned to a test or a control group. In the test group patients, Bio-Oss((R)) Collagen was placed in the fresh extraction socket while in the controls no grafting was performed. Radiographic examination (cone beam computed tomograms, CBCT) was performed immediately after tooth extraction and socket treatment. Four months later, a new CBCT was obtained. In the radiographs, (i) the distance (mm) between base of the alveolar process (apex) and the buccal and palatal crests was determined, (ii) the outer profile of alveolar process of the experimental sites was outlined, and the cross section of the area (mm(2)) determined.ResultsAfter 4months of healing, the buccal and to a less extent also the palatal bone plate had become markedly reduced in height. The placement of a biomaterial in the socket failed to prevent resorption of the buccal and palatal bone walls. The cross-sectional area of the control ridge was reduced about 25% and of the test ridge with 3%.ConclusionThe placement of a xenograft in fresh extraction sockets markedly counteracted the reduction in the hard tissue component of the edentulous sites.