摘要
目的:观察髁状突纵形骨折后及夹板治疗时双侧颞下颌关节区的血流情况。探讨夹板治疗机制。材料和方法:中国实验用小型猪14头,分为髁状突纵形骨折未治疗组、夹板治疗组及正常对照组。分别于髁状突纵形骨折后2、3、4、12周做核素三相骨扫描检查。结果:髁状突纵形骨折侧颞下颌关节(Temporomandibularjoint,TMJ)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,夹板治疗组各时间点均较未治疗组的a/β比值高。骨折侧血池相及延迟相计数比值升高,骨折后2周最高,然后逐渐下降。延迟相计数比值在夹板治疗组较未治疗组高。结论:夹板治疗髁状突纵形骨折有利于骨折后的血供,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。
Purpose: To observe the effects of occlusal splint treatment on the bloodflow in TMJ region after SFMC and to explore the mechanism of the occlusal splint treatment. Materials and Methods: 14 miniature pigs were divided into 3 groups:untreated,occlusal splint treatment after SFMC and control group. Three-phase bone scintigraphy were performed on these pigs at different time. Results: The data showed the index of the time-activity curve from blood flow phase increased and blood flow arriving time was postponed after SFMC.The a/ ratio rose its peak value at 2 weeks after SFMC.The a/ ratio was higher after occlusal splint treatment.The count radio from blood pool and static phase was higher than nonfractured sides.The peak value were present at 2weeks after fracture. Conclusion: Occlusal splint treatment can improve blood supply after SFMC.The possible mechanism is reduction of the intraarticular pressure and blood stasis in bone marrow.
出处
《中国医学影像学杂志》
CSCD
1999年第2期134-135,共2页
Chinese Journal of Medical Imaging