Curvature of the Femur and the Proximal Entry Point for an Intramedullary Rod

Harper, Marion C.; Carson, William L.

doi:10.1097/00003086-198707000-00021

Cited by 86 publications

(50 citation statements)

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“…For each 1°of anterior femoral bowing, the angular deviation between the mechanical and distal femoral axes increased nearly 0.5°. Previous studies have reported the existence of anterior femoral bowing [11,13,35]. Because of differences in the methods used to evaluate femoral bowing, direct comparisons are difficult, but our study confirms the existence of anterior femoral bowing in Korean patients.…”

Section: Discussionsupporting

confidence: 48%

Differences between Sagittal Femoral Mechanical and Distal Reference Axes Should Be Considered in Navigated TKA

Chung

Kang

Chang

et al. 2009

Clinical Orthopaedics &Amp; Related Research

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In computer-assisted TKA, surgeons determine positioning of the femoral component in the sagittal plane based on the sagittal mechanical axis identified by the navigation system. We hypothesized mechanical and distal femoral axes may differ on lateral views and these variations are influenced by anteroposterior bowing and length of the femur. We measured angles between the mechanical axis and distal femoral axis on 200 true lateral radiographs of the whole femur from 100 adults. We used multivariate linear regression to identify predictors of differences between the axes. Depending on the method used to define the two axes, the mean angular difference between the axes was as much as 3.8°and as little as 0.0°, with standard differences ranging from 1.7°to 1.9°. Variation between the two axes increased with increased femoral bowing and increased femoral length. Surgeons should consider differences between the mechanical axes and distal femoral axes when they set the sagittal plane position of a femoral component in navigated cases. Our findings also may be relevant when measuring rotation of the femoral component in the sagittal plane from postoperative radiographs or when interpreting femoral component sagittal rotation results reported in other studies.

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Section: Discussionsupporting

confidence: 48%

Differences between Sagittal Femoral Mechanical and Distal Reference Axes Should Be Considered in Navigated TKA

Chung

Kang

Chang

et al. 2009

Clinical Orthopaedics &Amp; Related Research

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“…Harper et al (27) introduziram guias intramedulares de 3mm de diâmetro de forma retrógrada na região intercondiliana do fêmur. Concluíram que a ponta do trocân-ter não foi a saída mais natural do guia e que o melhor local foi a junção entre o colo do fêmur e o trocânter.…”

Section: Discussionunclassified

“…Isso pode ter sido devido à utilização de um fioguia reto, não acompanhando a curva de raio do fêmur, o que pode ser um fator de crítica. Harper et al (27) introduziram implantes com curva de raio (203cm e 137cm) e encontraram um ponto de entrada localizado dorsal ao trocânter, resultado diferente do encontrado quando utilizaram fio-guia reto, que ficou mais anterior.…”

Section: Discussionunclassified

Ponto de entrada para as hastes intramedulares anterógradas do fêmur: estudo em cadáver

et al. 2009

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, Ney Pecegueiro do Amaral 8 rESUMO Objetivo: Analisar a saída natural do fio-guia no trocânter maior pela via retrógrada do fêmur, em espécimes de cadá-ver. Métodos: 100 fêmures foram perfurados entre os côndilos femorais, a 1,2cm da região intercondilar. Um fio-guia reto de 3mm foi introduzido, de forma retrógrada, até alcançar a extremidade proximal do fêmur. Foram avaliados em relação à região posterossuperior e anterossuperior do trocânter maior, fossa piriforme e linha mediana superior entre a cabeça-colo e trocânter maior. Resultados: Em 62% o fio-guia reto saiu na face anterior do trocânter maior. Na fossa piriforme, a distância mediana observada foi de 1,0cm e a amplitude interquartílica, de 0,5cm, expressando inicialmente, em relação à fossa piriforme, melhor precisão. Conclusão: O eixo central do canal medular, na incidência coronal, projetou melhor precisão na região da fossa piriforme.

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“…The nail may rip the distal anterior cortex of the femur during femoral nailing. [1,18,22] Additionally, mismatch of the nail, curve of the femur cause inadequate contact of the fracture ends and it leads to new problems. [1,21] The insertion process may become difficult as an inappropriately curved nail leans against the medullary wall.…”

Section: The Digital Measurements For Femoral Prosthesis In Turkish Pmentioning

confidence: 99%

The digital measurements for femoral prosthesis in a Turkish population

Dönmez¹

2013

Anatomy

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Objectives: This study was designed (i) to evaluate the angle between anatomical and mechanical axes of the femur and (ii) to compare shaft curve of the femur according to anatomical axis of femur with curve of the four femoral nail used in a Turkish population, in order to determine the safety degrees of distal femoral valgus cut for a routine surgical procedures. Methods:Sixty-six right femurs, 68 left femurs and 4 femoral nails were measured. We measured the angle between anatomical axis and mechanical axis, the shaft curve of the femur according to anatomical axis on the femurs and shaft curve of the femoral nail on 4 femoral nails, which are commonly used in Turkey, using a digitizer system. Results:In the 66 right femurs, the mean values of the angle between anatomical axis and mechanical axis was calculated as 6.386±0.820º and the mean value of the shaft curve of the femur according to anatomical axis was calculated as 16.713±2.371º. In the 68 left femurs, the mean value of angle between anatomical axis and mechanical axis was calculated as 6.915±0.712º and the mean value of the shaft curve of the femur according to anatomical axis was calculated as 16.148±2.689º. We calculated that curve of the 4 nails were Hipokrat 8.65º, Trigen 10.20º, Ortopro 6.38º and Recon 8.70º, respectively. Conclusion:According to our results, new nails should be designed in the light of anatomical studies for each population. This will reduce the complications during surgery.

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Curvature of the Femur and the Proximal Entry Point for an Intramedullary Rod

Cited by 86 publications

References 0 publications

Differences between Sagittal Femoral Mechanical and Distal Reference Axes Should Be Considered in Navigated TKA

Differences between Sagittal Femoral Mechanical and Distal Reference Axes Should Be Considered in Navigated TKA

Ponto de entrada para as hastes intramedulares anterógradas do fêmur: estudo em cadáver

The digital measurements for femoral prosthesis in a Turkish population

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