The effect on mechanical axis deviation of femoral lengthening with an intramedullary telescopic nail
| Autor: | Dror Paley, Rolf D. Burghardt, S. C. Specht, J. E. Herzenberg |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Adult
Male Adolescent External Fixators Radiography Nonunion Bone Nails Bone Lengthening law.invention Intramedullary rod Young Adult law Humans Medicine Orthopedics and Sports Medicine Femur Mechanical axis biology business.industry Equipment Design Anatomy Middle Aged biology.organism_classification medicine.disease Leg Length Inequality Valgus Treatment Outcome medicine.anatomical_structure Nail (anatomy) Female Surgery business |
| Zdroj: | The Journal of Bone and Joint Surgery. British volume. :1241-1245 |
| ISSN: | 2044-5377 0301-620X |
| Popis: | Internal lengthening devices in the femur lengthen along the anatomical axis, potentially creating lateral shift of the mechanical axis. We aimed to determine whether femoral lengthening along the anatomical axis has an inadvertent effect on lower limb alignment. Isolated femoral lengthening using the Intramedullary Skeletal Kinetic Distractor was performed in 27 femora in 24 patients (mean age 32 years (16 to 57)). Patients who underwent simultaneous realignment procedures or concurrent tibial lengthening, or who developed mal- or nonunion, were excluded. Pre-operative and six-month post-operative radiographs were used to measure lower limb alignment. The mean lengthening achieved was 4.4 cm (1.5 to 8.0). In 26 of 27 limbs, the mechanical axis shifted laterally by a mean of 1.0 mm/cm of lengthening (0 to 3.5). In one femur that was initially in varus, a 3 mm medial shift occurred during a lengthening of 2.2 cm.In a normally aligned limb, intramedullary lengthening along the anatomical axis of the femur results in a lateral shift of the mechanical axis by approximately 1 mm for each 1 cm of lengthening. |
| Databáze: | OpenAIRE |
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