KNEE-JOINT CONTACT PRESSURE DECREASES AFTER CHRONIC MENISECTOMY RELATIVE TO THE ACUTELY MENISCECTOMIZED JOINT - A MECHANICAL STUDY IN THE GOAT
KNEE-JOINT CONTACT PRESSURE DECREASES AFTER CHRONIC MENISECTOMY RELATIVE TO THE ACUTELY MENISCECTOMIZED JOINT - A MECHANICAL STUDY IN THE GOAT
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DOI：
10.1002/jor.1100110604
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发表时间：
1993-11-01
影响因子：
2.8
通讯作者：
GROOD, ES
中科院分区：
文献类型：
--
作者：
BYLSKIAUSTROW, DI;MALUMED, J;GROOD, ES
多项研究表明，半月板切除会立即引起膝关节接触压力的急剧增加，而压力分布的变化会导致骨骼和软组织的重塑。据推测，这种重塑反过来会影响接触压力。这项研究验证了内侧半月板切除后内侧半月板接触压力立即增加，然后随时间减少的假说。关于内侧椎间隙接触面积和外侧椎间隙压力的支持假说也得到了检验。对7只成年山羊行单侧内侧半月板切除术。4个月或8个月后，在半月板切除前后，测量受累关节和对侧关节的接触压力和接触面积。慢性半月板切除关节的内侧室压力明显低于急性半月板切除的成对关节，但仍显着高于完整关节。在4月组和8月组中，急性和慢性半月板切除关节的平均压力分别比成对完整关节的压力大70%和42%。急性和慢性关节的平均内侧间隙接触面积分别比正常关节低60%和50%，而平均侧间隙压力保持不变。这项研究表明，关节重塑可以降低关节接触压力。它还表明，降低压力集中的治疗的有效性只能通过在术后同一时间与慢性半月板切除关节的压力进行比较来确定，因为在没有治疗的情况下，压力随着时间的推移而降低。
Several studies have shown that meniscectomy causes an immediate, acute increase in knee joint contact pressure and that changes in pressure distribution cause remodeling of bone and soft tissue. Presumably, this remodeling in turn affects contact pressures. This study tested the hypothesis that medial compartment contact pressure increases immediately after medial meniscectomy and then decreases with time. Supporting hypotheses regarding medial compartment contact area and lateral compartment pressures also were tested. Unilateral medial meniscectomy was performed on seven adult goats. Four or 8 months later, contact pressure and area were measured in vitro in the involved joints, as well as in the contralateral joints, before and after removal of the meniscus. The medial compartment pressures of the chronically meniscectomized joints were significantly less than those of the acutely meniscectomized paired joints but remained significantly greater than those of the intact joints. For the 4 and 8 month groups combined, the mean pressures of the acutely and chronically meniscectomized joints were greater than the pressures of the paired intact joints by 70 and 42%, respectively. The mean medial compartment contact areas of the acute and chronic joints were lower than those of the intact joints by 60 and 50%, respectively; mean lateral compartment pressures remained the same. This study indicates that joint remodeling reduces joint contact pressures. It also suggests that the effectiveness of a treatment to reduce pressure concentrations may be determined only by comparison, at the same postoperative time, of the pressure with that of the chronically meniscectomized joint, since pressures decreased with time without treatment.