Stature estimation from anatomical landmarks in femur using postmortem CT

Baba, Miho; Hyodoh, Hideki; Okazaki, Shunichiro; Shimizu, Junya; Mizuo, Keisuke; Rokukawa, Masumi; Watanabe, Satoshi; Matoba, Kotaro; Inoue, Hiromasa

doi:10.1016/j.jofri.2016.11.002

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…The use of body‐height‐specific measures to determine CCR* and CI* is justified by the correlation of BH and femur length found in this study alike to previous ones 37,38 . The body‐specific normalization solely results in minor changes for most femurs, but larger or small patients might benefit from this approach.…”

Section: Discussionmentioning

confidence: 63%

“…36 The use of body-height-specific measures to determine CCR* and CI* is justified by the correlation of BH and femur length found in this study alike to previous ones. 37,38 The body-specific normalization solely results in minor changes for most femurs, but larger or small patients might benefit from this approach. Percentages of donors' body heights with decimal places were used to reflect the constant positions suggested by Dorr and the average BH of the donors' population.…”

Section: F I G U R Ementioning

confidence: 99%

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Influence of bone morphology and femur preparation method on the primary stability of hip revision stems

Konow

Schlieker

Lampe

et al. 2022

Journal Orthopaedic Research

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Aseptic loosening is one of the major reasons for re-revisions of cementless revision stems. Insufficient primary stability is associated with bone characteristics and the surgical process. This study aimed to investigate how femur morphology and preparation methods influence the primary stability of revision stems. The Femur morphology was described by the upper femoral curvature (UFC) and an individualized Dorr type classification based on the ratio between the canal-to-calcar ratio (CCR*) and the cortical index (CI*) introduced as the cortical-canal shape (CCS). Manual and powered reaming in combination with helical and straight reamers were used to prepare the bone cavity of 10 cadaveric human femur pairs. Forces during stem impaction were recorded (Reclaim, Depuy Synthes). Micromotion at the bone-implant interface during cyclic axial loading and torsional load to failure was determined. The CCS and impaction forces (R 2 = 0.817, p < 0.001) or torsional strength (R 2 = 0.577, p < 0.001) are inversely related. CCS did not correlate with micromotion during axial loading (R 2 = 0.001, p > 0.999), but proximal femoral curvature did (R 2 = 0.462, p = 0.015). Powered reaming and straight reamers led to an improved torsional strength (both: p = 0.043). The Individualized Dorr classification CCS and UFC allows a good estimation of the primary stability of revision stems. For severely curved Dorr type-C femurs, an alternative anchorage method should be considered clinically.

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Section: Discussionmentioning

confidence: 63%

Section: F I G U R Ementioning

confidence: 99%

Influence of bone morphology and femur preparation method on the primary stability of hip revision stems

Konow

Schlieker

Lampe

et al. 2022

Journal Orthopaedic Research

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“…The dimensions from previous studies were used to design the femur model in this study, Table 2, Figure 2. The dimensions used were in the range of the dimensions provided in the previous studies [13–17]. To construct the femur, planes P1 to P6 were created along lines L1 and L2.…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of newly developed hip prosthesis

Namasivayam

Andriyana

Arifin

2022

Materialwissenschaft Werkst

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The present study focuses on the design and finite element analysis of a novel hip prosthesis comprising truss structures intended to equally distribute the stress along the prosthesis. The prosthesis is designed to suit three different inclination angles of 20°, 40° and 60°. The three designs were subjected to loading conditions that emulate walking, jogging, and cycling activities via finite element simulations. Using the von Mises yield criterion and Goodman relation for fatigue, it is found that the safety factor and the life cycle of the proposed prosthesis design was within the acceptable range. Furthermore, the truss structures incorporated in the prosthesis appear to reduce the stress levels in the femur.

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