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Z T Ma

Publications and source records attributed to Z T Ma.

5 recordsLinked to original sources
PubMed1994

[Bony changes at the femur side after hip joint replacement: radiologic analysis of 80 hip joints].

The authors, according to Amstutz, studied the roentgenographs of 80 postoperation cases of cemented hip joint replacement performed more than two years-ago. There were bone changes in 64 cases (80%), of them, sclerosis of bone in 32 cases (40%), atrophy of bone in 25 cases (31%), absorption of bone in 24 cases (30%), thickness of bone cortex in 18 cases (22%), enlargement of medullary cavity in 12 cases (15%), periosteum reaction in 8 cases (10%), and thinness of bone cortex in 1 case (1.3%). Most of them usually occurred in the sixth month to the second year post-operation and located mainly at the 1, 4, 5 and 7 regions. The authors think that the most important cause is the unbalance of biologic stress, and other factors are elasticity and hardness of prosthesis, frictional force, cemented of the stem, etc.

Adult↗
PubMed1994

Limb-salvage for osteosarcoma.

Limb-salvage surgery plays an important role in the treatment of osteosarcoma. Among 104 patients with osteosarcoma we managed from 1974 to 1993, 60 were treated with limb-salvage procedure. 44 patients with IIB tumor received adjuvant chemotherapy, and the five-year survival rate was 46.69%. The local recurrence rate of these 60 patients was 15%, the infection rate 11.7%, and the prosthetic mechanical complication was 13.3%. Our results suggest that limb-salvage procedures are not only possible but also can provide patients with better function.

Adolescent↗
PubMed1994

[Fast neutron treatment of osteosarcoma].

Twelve patients with advanced osteosarcoma were treated with fast neutron at the Neutron Therapy Facility, the Hight-Energy Physics Institute, Chinese Academy of Science. Of the 12 patients, 5 were operated after radiotherapy. Three of them received fast neutron alone, and the other 2 with added 60Co. The doses ranged from 660 NcGy to 2 168 NcGy. Pain was relieved and the tumor size decreased in all the treated patients. Only one case was found histologically free of viable tumor cells. Skin reaction was serious and the knee joint function was impaired in all patients.

Adolescent↗