RESUMO
Objective To evaluate the effect of double-plate treatment on grade Ⅱsupination adduction ankle frac? tures with impaction of tibial plafond. Methods A total of 17 patients of gradeⅡsupination adduction ankle fractures with impaction of tibial plafond were treated surgically in our hospital. Anteromedial approach to the medial malleolus was taken to expose the tibial plafond and the vertical medial malleolus fractures. One distal radius plate was placed on the anteromei?dal tibial plafond, and another buttress plate was placed on the medial malleolus. Bone grafting was used to restore the height of the collapsed tibia. Lateral malleolus fractures were treated with reconstruction plate. The fracture union after operation was detected by X-ray examination. American Orthopedic Foot and Ankle Society (AOFAS) ankle hind foot score was used to assess the ankle function. Results Sixteen of 17 patients were followed up postoperatively for a mean period of 2.6 ± 0.9 years. CT cross-sectional study found that the collapsed articular surface of 12 (70.6%) patients was mainly located in the an?teromedial one-fourth area, with the worst at anterior margin. Bony fusion was achieved in all patients after an average peri?od of 2.9±0.5 months. No internal fixation loosening or fracture redisplacement was found by X-ray. The average range of an?kle joint activity was 16.4°±2.8° for dorsiflexion, and was 39.2°±5.3° for plantarflexion. According to AOFAS ankle hindfoot scale, ankle function was excellent in 14 patients and good in 2, with excellence rate of 100%. Conclusion The application of double-plate fixation to treat gradeⅡsupination adduction ankle fractures with impaction of tibial plafond can play a key role in reducing fracture redisplacement and osteoarthritis.
RESUMO
[Objeetive]To report the repairing offect of cancellous bone defect with calcium sulphate.[Method]A defect 5mm in diameter and 12 mm in deep,which was drilled in the lateral aspect of rabbit lateral femoral condyle,was filled with CCaS(Citrated Calcium Sulphate)cylinder or Osteoset tablets respectively.Rabbits were killed 3,6,13 weeks after surgery.And then general oberservations and mechanical analyzing were conducted.[Result]After surgery,rabbits had good movements,spirits and eating,good healing of incision.There was no arthroedema and inflammatory response around the joints.Mechanical analyzing reports:both anticompressive strength and elasticity coefficient in the artificial bone repair bone defect area 3 weeks after surgery,were higher than in that of normal femur condyle;Anti-compressive strength and elasticity coefficient in the defect area 6 weeks,which drop comparing to 3 weeks,was lower than that of normal femur condyle;Anti-compressive strength and elasticity coefficient 13 weeks,which is higher than 6 weeks,is approaching normal.Mechanics intensity of two groups in the different time had no significant difference,but was significantly higher than one of the same time blank group.[Conclusion]To some extent,Calcium Sulphate has mechanical supportive effects on cancelloues bone defect in spite of the absorption and degradation of Calcium Sulphate.There is no significant difference between Citrated Calcium Sulphate and Osteoset tablets.