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The Journal of Bone & Joint Surgery British Volume
Vol. 70-B, Issue 2 | Pages 187 - 191
1 Mar 1988
Makela E Vainionpaa S Vihtonen K Mero M Rokkanen P

Forty-four rabbits were operated on when five weeks old; in one group a 2 mm drill-hole was made in the intercondylar portion of the right femur across the central portion of the growth plate up to the diaphysis, while in the other group a similar drill-hole of 3.2 mm was made. At 3, 6, 12 and 24 weeks after operation, specimens from the growth plates of both femora were analysed using radiographic, microradiographic, histological and histomorphometric techniques. It was found that destruction of 7% of the cross-sectional area of the growth plate caused permanent growth disturbance and shortening of the femur.


The Journal of Bone & Joint Surgery British Volume
Vol. 69-B, Issue 4 | Pages 615 - 619
1 Aug 1987
Bostman O Vainionpaa S Hirvensalo E Makela A Vihtonen K Tormala P Rokkanen P

Fifty-six patients with displaced malleolar fractures had open reduction and fixation of the fracture fragments using, by random selection, either biodegradable implants or metal AO plates and screws. The cylindrical biodegradable implants were made of polylactide-glycolide copolymer (polyglactin 910). The complications, radiographic results and functional recovery were studied prospectively. After follow-up of at least one year, no significant differences emerged in the complication rate or in the results of treatment between the two methods of fixation. Because of the advantage of avoiding the need to remove metal fixation after union, we now use biodegradable internal fixation routinely to treat displaced malleolar fractures.