belstaff bolsas Of absorbable internal fixation of

lin06900 · Wysłany: Pon 19:16, 21 Mar 2011

Of absorbable internal fixation of ankle fractures Experience

Il shad fixation one hundred and eleven I-l care L7 recent years, the ankle fracture treatment,[link widoczny dla zalogowanych], more surgery to take sides,-PGA, P1IA. After a high temperature and pressure and other processing techniques into a screw method, the current surgical treatment of ankle fracture fixation screws for the metal, small plate, Kirschner wire and so on. The disadvantage is required reoperation after fracture healing out. Finland and Sweden,[link widoczny dla zalogowanych], with production of self-reinforced Poly lactide (SR-PGA), polylactide (PIIA) absorbable screws, fixed rod, selective application of ankle fractures, demonstrated its unique advantages, results were satisfactory, reported below. 1. Materials and methods The material can be absorbed screw diameter 4,5 mm. Inner diameter of 3,5 mm, length 2,5 ~ 7.0cm, fixed rod diameter 2,0 ~ 3,2 mm, length 3.0 ~ 7.0mm. Surgical Tools (1) supporting the use of 2.0mm and 3.2mm diameter drill bit; (2) screwdriver 4,5 mm in diameter; (3) countersunk screws and related devices screwdriver; (4) diameter of 2.0mm and 3,[link widoczny dla zalogowanych],2 mm fixed rod help into the device. General information and methods (1) The group of 24 patients with ankle fracture. L9 male, female 5 cases. Age of l7 ~ 54 years, mean 36 years. Fracture type, press 1. . ouge-Hansen Category: supination external rotation l0 cases of supination adduction 6 cases,[link widoczny dla zalogowanych], pronation external rotation in 5 cases. Pronation abduction, 3 cases; (2) were used absorbable screws 26, fixed bar 7; (3) surgical cases: In accordance with ankle surgery practice, the first exposure to the ankle fracture, the fracture type, the entire complex joint dislocation and fracture displacement. When necessary, temporary Kirschner wire fixation in fine, the first line after a fixed ankle, followed by the lateral malleolus. Finally fixed the medial malleolus. Intraoperative radiograph after fixation confirmed reduction and internal fixation in good condition after. Close the incision. Protection of four to six weeks after plaster. 2. The results of ankle joint function, according to Oterud and Molander criteria to judge: excellent l8 cases, good in 4 cases, 2 cases. El 24 patients healed wound, no infection, complications such as subcutaneous fluid. The 40 patients with metallic fixation compared with no significant difference in efficacy. 3. Discussion of absorbable internal fixation materials for orthopedic treatment was less than ten years, domestic use, asked about 4 to 5 years. Our department for three years. Such material is SR and fixed bar. According to information on the bending strength of 220 ~ 400MPa. Shear strength of 180 ~ 250MPa, elastic modulus l0 ~ 15GPa. Significantly more than the cortical bone strength, this semi-threaded screw lag screw, bone-side with a significant pressure effect. Elliptical cross-section of the fixed bar, has a certain force against rotation, so the early fixation can be absorbed in the body can produce adequate strength and stability. The use of the 24 patients 33 to absorb the internal fixation, fracture displacement were not there, loosening. Bio-absorbable material properties and the degradation process in the body in line with human physiological processes. The organization has a good compatibility. Information on the mechanical strength after six weeks into the body gradually weakened, compared with metal internal fixation internal fixation to avoid the metal caused by stress shielding caused by osteoporosis and other adverse effects. The gradual degradation of about a year and a half of water and carbon dioxide can be absorbed by the body. Tens of thousands of cases of foreign reports have never been systemic toxicity,[link widoczny dla zalogowanych], with occasional reports of local subcutaneous fluid. The patients in this situation does not appear. Application of ankle fracture fixation can be absorbed. Our department's experience: ① can be used for the medial malleolus, posterior malleolus fracture, comminuted fracture, except; ② lateral malleolus fracture under conditions selective application of the fracture line; ③ severe ankle fractures from the tibia under the tibiofibular joint dislocation and separation cases can be combined with Metal fixing material used; ④ partial epiphyseal closure of the patient can not completely smooth application of the fixed rod and a smaller diameter absorbable screws were fixed, does not affect bone growth. Absorbable fixation Another obvious advantage is to avoid the pain of the second operation, the operation is relatively simple. Easy to master, worthy of clinical use and promotion. Fixation implanted in the body strength began to decline after six weeks, a serious ankle fracture dislocation or old fracture or with the use of metal materials still need to use caution. Postoperative plaster immobilization protection still need a few weeks.
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