摘要
目的：观察夹板治疗髁状突纵形骨折对骨折愈合及颞下颌关节的影响。为临床提供参考。方法：小型猪１４头随机分为髁状突纵形骨折未治疗组；夹板治疗组和对照组。分别于骨折后２周、３周、４和１２周行同位素三相骨扫描；３周、６周、１２周做ＣＴ扫描。结果：髁状突纵纵形骨折后，骨折侧血流相的时间－放射性强度曲线改变大，峰值升高，峰时后延，以２周时最为明显，夹板治疗组较未治疗组的α／β比值高。骨折侧血池相及延迟相计数值升高，以骨折后２周为最高，然后逐渐下降。ＣＴ显示：髁状突纵形骨折后３周均显示骨折处密度低，夹板治疗组：骨折处骨质密度逐渐增高，１２周时骨折愈合，呈基本正常髁状突外形。未治疗组的髁状突骨折处骨质密度始终低，呈双髁突畸形。结论：夹板治疗髁状突纵形骨折有利于骨折后的血流、骨折愈合及髁突的改建。可能的作用机制是夹板减轻关节内及骨内压力，减轻静脉瘀血；防止关节内继发性损伤。关节内的盘突粘连、局部骨质缺损，可能是影响关节血供与核素聚集的因素。
Objective:To observe the effects of occlusal splint treatment on the fracture healing and blood flow in TMJ region after SFMC.Methods: 14 childhood miniature pigs were chosen and divided into 3 groups. untreated, occlusal splint treatment after SFMC and control group. Three phase bone isotopic scanning techniques and spiral CT were performed on these pigs at different time.Results: The data showed the value of the time activity curve of blood flow image increased and blood flow arriving time was postponed after SFMC. The α/β ratio were the highest at 2 weeks after SFMC. The α/β ratio was higher with occlusal splint treatment. The count of blood pool image and static image was higher than nonfractured sides. The peak were at 2 weeks after fracture. The density of fractured regions were low at 3 weeks after SFMC. The density were increased gradually and at 12 weeks the fracture were healed, a normal condyle contour were formed in occlusal splint group. The density were always low at fractured rgeion and bifid condyle were formed in untreated group.Conclusion: Occlusal splint treatment can do benefit to blood supply in TMJ region, fracture healing and condole remodeling after SFM. The possible mechanism is to reduce the pressure of intraarticular, blood stasis of bone marrow and prevent secondery injuries to TJM.
出处
《军医进修学院学报》
CAS
1999年第2期133-135,共3页
Academic Journal of Pla Postgraduate Medical School
关键词
He夹板
髁状突骨折
放射性核素
螺旋CT
疗效
occlusal splint
mandibular condyle
fracture healing
the three phase bone scan
radionuclide imaging
spiral CT
