内置式牵引器经腭横缝牵引成骨对上颌骨及腭骨形态的研究(1)
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[摘要]目的：在实验动物腭部置入牵引器，通过形态学观察及X线影像测量，观察SDO技术对犬上颌骨及腭骨形态生长发育影响。方法：选取12周龄雄性杂种犬16只，体重3～4kg，随机分为NC组4只及实验组(SDO组)12只(2组×6只)。牵引器直径分别为0.9mm、1.0mm。牵引器压缩前长度为2.8cm。牵引器在压缩距离为0.5～1.8cm时张力值分别为250～480g、350～760g。2个实验组牵引28～35天，陆续将3组犬处死。观察记录3组犬的腭部形态变化及牙合关系变化。定期拍摄定上颌咬合片。结果：SDOI和II组与NC组相比，硬腭长度明显增大。其中SDOII组硬腭长度增大更为明显。结论：SDO技术明显延长腭骨长度，前移上颌骨。
[关键词]经骨缝牵引成骨；腭骨；上颌骨；组织再生
[中图分类号]R782 [文献标识码]A [文章编号]1008-6455(2011)03-0387-04
Influence of trans-sutural distraction on the morphologic development of maxillae and palatine bone
CHANG Shi-min1,LIU Chun-ming2,YAO Yu-sheng3
(1.Department of Stomatology,Beijing Friendship Hospital,Capital Medical University,Beijing 100050,China;2.Department of Plastic Surgery,General Hospital of PLA;3.Department of Oral and Maxillofacial Surgery,Scond affiliated Hospital of Liaoning Medical University)
Abstract:ObjectiveTo analyze the structural changes of maxillae and palatine bone during and after trans-sutural distraction.Methods Sixteen 12-week mongred dogs,with body weight about 4kg, were randomly assigned into three groups:the Normal Control (NC) group(n=4),experimental group(SDO) I(n=6) and experimental group (SDO)II (n=6).Internal distractors made of TiNical memory alloy, with two initial force levels of 480g×2 and 760g×2 were inserted into maxillae and palatine bone across the transvers palatine suture of the two experimentmental group respectively.Clinical observation and X-ray analysis were performed regularly during the experimental period. The structural changes of maxillae and palatine bone were analyzed. Results①Compared with the NC group, dogs of the experimental group I and II showed significant increase in the length of palatine bone and maxillae move forward significantly.②The length of palate of SDO II prolonged more quickly and obvious than group I;③The maxilla of SDO II move forward more quickly and obvious than group I.Conclusion The SDO technique can significantly prolong the length of palatine bone and maxillary bone can move forward succesfully.
Key words:sutural distraction osteogenesis;palatine bone;maxillary bone;tissue regeneration
上颌骨发育不足和硬腭长度不足是颅颌面外科常见的畸形 ......
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