腰骶椎前路螺旋融合笼(AFC)放置方式的生物力学选择

A BIOMECHANICAL STUDY ON THE CHOICE OF LOCATING PATTERNS OF LUMBOSACRAL ANTERIOR FUSING CAGE(AFC)

目的：筛选出生物力学性能较好且临床应用简便的FC放置方式．方法：使用5具同期生长新鲜牛椎骨制成运动节段标本，比较了四种FC放置方式下的生物力学稳定性．结果：前三种FC放置方式在各种工况下的刚度、柔度相似，稳定性高于第四种方式．前两种方式被用于临床治疗14例下腰痛患者，初步结果满意．结论：FC的放置位置、数量不是其稳定脊柱节段作用的最直接因素；FC的直径将直接影响其稳定效果；若选用适当的FC直径和长度，则经LSSI前路正中放置1枚FC及经L4．5前路左前外斜向放置1枚FC的方式是有效而简便的方式．

Aims: To chosing the locating patterns that have better biomechanical properties and more simpleand convenient for clinic. Methods f o fresh calf specimens were used in the study the stability of 4kinds of the FC(Fusing Cage)'s locating patterns was compared at these motion segments. Results;The sit f'fness and laxitt under all kinds of the conditions among the former 3 kinds of the FC'slocating patterns was similar. They have more stability than the forth one. The former 2 kinds ofthe patterns were used to treat the 14 patients with Low Back Pain and made satisfied effectpreliminary. Conclutlons: The most direct stability effect is neither from FC's orientation nor it'snumber. It is FC's diameter that will effect directly on the stability. If the FC's diameter and lengthare chosen properly. AFC patterns located either in the middle of interbody space at L5S1 orleft-lateral obliquely at L4.5 by anterior approachh would be effective and convenient.