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Biomedical subjects

K R Dai

Publications and source records attributed to K R Dai.

25 records · Page 2Linked to original sources
PubMed1989

[An in vivo study of inorganic bone particle-impregnated bone cement].

According to definite proportion by weight, inorganic bone particles were impregnated into bone cement and then used for the fixation of implanted artificial femoral head in a series of canines. Upon successive observations, new bone was seen to have already been growing into the bone cement one month post operatively, and active growth going on with bone tissue passing through the whole layer of cement three months after operation. In the fifth month's specimens, most of the inorganic bone particles were replaced by new bone tissue while slices of one year post operation showed that the bone tissue was mature and the activity of bone formation ceased. The biological fixation effect produced by bone ingrowth was found to have increased the shearing strength of cement-bone interface to 1.4-3.6 times of the control side and the stability of prosthesis was improved obviously. The bone-particle-impregnated bone cement has already been using in our clinical practice since 1987.

Animals↗
PubMed1985

Intercostal-lumbar-spinal nerve anastomoses for cord transection. A preliminary investigation.

Since 1978, 10 intercostal nerve-cauda equina anastomoses and 11 intercostal nerve-lumbar anastomoses were performed for thoracolumbar spinal cord transection. Three to four pairs of intercostal nerves above the traumatic level of the cord were anastomosed with two to four pairs of cauda equina or lumbar nerve roots below the traumatic level, using microsurgical technique. The surgical techniques used for the latter 11 cases were performed through an extraperitoneal approach. The operative technique is described in detail. These 21 cases have been followed-up for six to 48 months. Electromyography (EMG) shows that action potentials are present in several previously paralyzed muscles in 11 cases. Muscle strength of some previously paralyzed muscles in three cases recovered to Grades 1 to 3. There is evidence that intercostal-lumbar-spinal nerve anastomoses provide a chance for neuronal regeneration, but unsatisfactory functional results are still questions for further study.

Adult↗