Oguz Yener, Saglam Haci, Dolanmaz Dogan, Uckan Sina
Baskent University Faculty Dentistry Oral and Maxillofacial Surgery Department, Ankara, Turkey.
Br J Oral Maxillofac Surg. 2011 Mar;49(2):135-7. doi: 10.1016/j.bjoms.2009.11.014. Epub 2010 Mar 11.
Ten unembalmed adult sheep mandibles were used. The mandibles were sectioned in the midline, followed by sagittal split ramus osteotomies to obtain 20 hemimandibles. Each distal segment was advanced 5mm on each hemimandible. Ten of the specimens were fixed with 4-hole extended 2.0 mm titanium miniplates and screws and the other 10 were fixed with 4-hole extended 2.0 mm locking miniplates/screws. Each fixed specimen was mounted on a servo-hydraulic testing unit with the fixation device, and was tested to a range of forces of 0-140 N. The displacement values (mm) under 20, 60, 120, and 140 N were compared with the help of the Mann-Whitney U-test, and there were no significant differences between them at any force tested. Locking miniplate/screws and standard miniplate/screws showed similar displacement values at the range of forces tested.
使用了10个未防腐处理的成年绵羊下颌骨。将下颌骨在中线处切开，随后进行矢状劈开升支截骨术以获得20个半下颌骨。在每个半下颌骨上，将每个远端节段向前推进5毫米。其中10个标本用4孔延长2.0毫米钛微型钢板和螺钉固定，另外10个用4孔延长2.0毫米锁定微型钢板/螺钉固定。每个固定好的标本通过固定装置安装在伺服液压测试单元上，并测试0至140牛的一系列力。在Mann-Whitney U检验的帮助下比较了20牛、60牛、120牛和140牛时的位移值（毫米），在任何测试力下它们之间均无显著差异。在测试的力范围内，锁定微型钢板/螺钉和标准微型钢板/螺钉显示出相似的位移值。
