medullary cavity

【 Objective 】 To explore the short-term and long-term effects of different postoperative treatments on the distal femoral bone blood supply, intraosseous pressure, bone metabolism, bone mineral density and articular structure at different stages after blocking of proximal and middle femoral medullary cavity with bone cement.

目的：探讨骨水泥阻塞股骨近中段骨干髓腔后采取不同术后处理方法在不同观察时间段对股骨远端骨血供、骨内压、骨代谢、骨密度以及关节组织结构方面的近、远期影响。

Main forms of skeleton's X-ray change are the increasing of skeletal density, widening and calcifying of interosseous membrane, changing of joint, round of bone and medullary cavity, hyperosteogeny, ossifying of obturator membrane and ligaments et al.

骨骼X线改变的主要表现是骨密度增高、骨间膜增宽或钙化、关节、骨周、髓腔有改变、骨质增生、闭孔膜及韧带钙化等。

The entry point was calculated at different angle of the proximal tibial slope and at different diameter of the tibial medullary cavity.

计算在不同斜坡角度、髓内钉直径的置钉点。

Compared with the west people, the offset is significantly smaller, while the neck shaft angle is significantly larger, the most parameters of the proximal femoral medullary cavity diameter is significantly smaller than those in white peoples. 4.

与欧美人种相比，中南地区人群offset明显较小，而颈干角明显较大，大多数股骨近端髓腔径线参数比白种人明显较小。

H2O2 and carbamide peroxide can penetrate tooth enamel and dentin and then enter the medullary cavity. Then the enzymes were inhibited obviously, but there was no irreversible damage.

H2O2和过氧化脲能够渗透牙釉质和牙本质并进入髓腔，髓腔内的酶类明显被抑制，但没有造成不可逆性损伤。

Measurement and analysis of the medullary cavity of metacarpal and proximal phalanx

掌骨、近节指骨骨髓腔的测量及其意义

Conclusion One-stage bone grafting filling medullary cavity after over-reaming is an appropriate method for pandiaphyseal osteomyelitis and can win high healing rate.

结论髓腔超扩植骨封闭方法治疗全骨干骨髓炎是可行的，可以获得较高的成功率。

Conclusion: Early out-of-bed activity after total hip replacement operation, may bring about major stress on MSC in medullary cavity and is harmful of patient reestablish.

结论：关节置换术后早期下地活动产生的较大应力，会明显抑制骨髓腔内MSC的增殖，不利于骨的重建愈合，临床应当避免。