Defining the load bearing axis of the lower extremity obtained from anterior-posterior digital radiographs of the whole limb in stance

Iseki, Y.; Takahashi, Toshiaki; Takeda, Hiroyuki; Tsuboi, Issei; Imai, Hiroshi; Mashima, Naohiko; Watanabe, Shohei; Yamamoto, Haruyasu

doi:10.1016/j.joca.2008.10.001

Cited by 43 publications

(34 citation statements)

References 25 publications

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“…[1][2][3][4][5][6][7] Multiple studies found computer-based measurements to have good to excellent reliability equal to traditional measurements in a variety of orthopaedic measurements, including the Cobb angle in adolescent idiopathic scoliosis, 1,2,8 templating in cementless total hip arthroplasty, 13 long leg radiographs for leg length evaluation, 3 hallux valgus deformity angles, 4 knee joint alignment in adult patients, 14 and determination of the metaphyseal-diaphyseal angle in tibia vara patients. 6 One of the major challenges in comparing the results of these studies is the lack of a single computer-based measurement program to allow standardization in measurements.…”

Section: Discussionmentioning

confidence: 99%

“…10 We used the guidelines of Portney and Watkins 11 to assess reliability, which are stricter criteria than those used in many papers evaluating similar digital radiographic measurements. 1,2,15 These studies used different reliability criteria, and if these had been employed in the current study, the reliability would have been good to excellent. The stricter criteria were chosen for evaluation given the strength of reliability found for standard radiographs by Gordon et al 10 We did observe 2 specific errors with the computerbased measurements.…”

Section: Discussionmentioning

confidence: 99%

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Reliability of Digital Radiographs for Pediatric Lower Extremity Alignment

Nowicki

Vanderhave²,

Farley³

et al. 2012

Journal of Pediatric Orthopaedics

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Reliability of Digital Radiographs for Pediatric Lower Extremity Alignment

Nowicki

Vanderhave²,

Farley³

et al. 2012

Journal of Pediatric Orthopaedics

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show abstract

“…In 2D studies, Iseki et al [3] evaluated the reliability of the inter-and intra-observer assessments of the mechanical alignment. Sailer et al [18] assessed the axial alignment and joint angulations of the lower extremity using mechanical axis measurements on the conventional and digital radiographs.…”

Section: Related Workmentioning

confidence: 99%

“…2 θ is the angle between the femur mechanical axis and the tibia mechanical axis. 3 θ is the angle between the femur mechanical axis and the knee transverse axis. 4 θ is the angle between the knee transverse axis and the tibia mechanical axis.…”

Section: Special Featuresmentioning

confidence: 99%

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3D Automatic Feature Construction System for Lower Limb Alignment

Xing

Yang

Theiss

et al. 2010

2010 International Conference on Cyberworlds

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Accurate measurement of lower limb alignment is vital for orthopedic surgery planning. Based on the 3D lower limb bone models reconstructed from CT images, a 3D feature construction system is developed to find the lower limb alignment. This paper presents new methods to automatically identify the anatomic axes, mechanical axes, joint center points, and reference planes of the lower extremities. As far as we know, there is no other system that can construct all these features automatically. With the above identified features, our system can calculate the related angles of the lower limb alignment accurately for orthopedic knee surgery planning. We applied our system on two groups of specimen (with 6 pairs of lower limbs), and the resulting related angles are identical to the actual angles of the lower limb alignment.

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Mid‐term patient‐reported outcomes are inferior in opening‐wedge high tibial osteotomy patients with untreated medial meniscus posterior root tear

Sasaki,

Maeda,

Tsushima

et al. 2024

J. exp. orthop.

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PurposeThe impact of untreated medial meniscus posterior root (MMPR) tear (MMPRT) during opening‐wedge high tibial osteotomy (OWHTO) on patient‐reported outcomes (PROs) remains poorly understood. This retrospective cohort study aimed to investigate the association between the presence of MMPRT and post‐operative PROs in patients who underwent OWHTO.MethodsA total of 83 knees that underwent OWHTO that were followed up for 6.6 years were included. Post‐operative PROs were assessed using the knee injury and osteoarthritis outcome score (KOOS) subscales. Medial meniscus extrusion (MME) was measured by magnetic resonance imaging (MRI). MMPRT was diagnosed based on preoperative MRI and intraoperative arthroscopy findings. The participants were categorized into the MMPRT and MMPR intact (MMPRI) groups, and their KOOS subscales were compared. Additionally, logistic regression analysis was conducted to explore the correlation between KOOS and MMPRT presence.ResultsIn total, 29 out of 80 (36.3%) knees were classified into the MMPRT group, while three knees underwent total knee arthroplasty. Preoperative MME was 3.5 ± 1.9 (range 0–8.9) mm, showing correlation with the presence of MMPRT (p = 0.004) by regression analysis. The post‐operative KOOS subscales of the MMPRT group were lower than the MMPRI group for pain (p = 0.017), activities of daily living (ADLs) (p = 0.001), sports (p < 0.001) and quality of life (QOL) (p < 0.001). Additionally, regression analysis showed the presence of MMPRT was correlated with lower KOOS subscale scores for pain (p = 0.041), ADLs (p = 0.011), sports (p < 0.001) and QOL (p = 0.002).ConclusionPreoperative MMPRT correlated with a reduction in mid‐term post‐operative PROs, as assessed using the KOOS, among patients who underwent OWHTO. Surgeons should consider addressing an MMPRT at the time of OWHTO.Level of EvidenceLevel IV.

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Defining the load bearing axis of the lower extremity obtained from anterior-posterior digital radiographs of the whole limb in stance

Abstract: Our computer-assisted method was reproducible, and should be considered an alternative method for the measurement of the alignment of the whole leg.

Cited by 43 publications

References 25 publications

Reliability of Digital Radiographs for Pediatric Lower Extremity Alignment

Reliability of Digital Radiographs for Pediatric Lower Extremity Alignment

3D Automatic Feature Construction System for Lower Limb Alignment

Mid‐term patient‐reported outcomes are inferior in opening‐wedge high tibial osteotomy patients with untreated medial meniscus posterior root tear

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