Med Biol Eng Comput - Corrective distal radius osteotomy: including bilateral differences in 3-D planning.

Tópicos

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Resumo

After a fracture of the distal radius, the bone segments may heal in a suboptimal position. This condition may lead to a reduced hand function, pain and finally osteoarthritis, sometimes requiring corrective surgery. Recent studies report computer-assisted 3-D planning techniques in which the mirrored contralateral unaffected radius serves as reference for planning the position of the distal radius before corrective osteotomy surgery. Bilateral asymmetry, however, may introduce length errors into this type of preoperative planning that can be compensated for by taking into account the concomitant ulnae asymmetry. This article investigates a method for planning a correction osteotomy of the distal radius, while compensating for bilateral length differences using a linear regression model that describes the relationship between radii and ulnae asymmetry. The method is evaluated quantitatively using CT scans of 20 healthy individuals, and qualitatively using CT scans of patients suffering from a malunion of the distal radius. The improved planning method reduces absolute length deviations by a factor of two and markedly reduces positioning variation, from 2.9???2.1 to 1.5???0.6?mm. We expect the method to be of great value for future 3-D planning of a corrective distal radius osteotomy.

Resumo Limpo

fractur distal radius bone segment may heal suboptim posit condit may lead reduc hand function pain final osteoarthr sometim requir correct surgeri recent studi report computerassist d plan techniqu mirror contralater unaffect radius serv refer plan posit distal radius correct osteotomi surgeri bilater asymmetri howev may introduc length error type preoper plan can compens take account concomit ulna asymmetri articl investig method plan correct osteotomi distal radius compens bilater length differ use linear regress model describ relationship radii ulna asymmetri method evalu quantit use ct scan healthi individu qualit use ct scan patient suffer malunion distal radius improv plan method reduc absolut length deviat factor two mark reduc posit variat mm expect method great valu futur d plan correct distal radius osteotomi

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