The biomechanics of the first metatarsal bone in hallux valgus: A preliminary study utilizing a weight bearing extremity CT

Collan, Lauri; Kankare, Jussi; Mattila, Kimmo

doi:10.1016/j.fas.2013.01.003

Cited by 96 publications

(85 citation statements)

References 19 publications

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“…In the present study, we focused on the first metatarsal (1MT) bone, because lesions of many foot diseases are typically located in 1MT, such as the hallux valgus, hallux rigidus, and hallucal sesamoid disorders. Several studies have reported that the 1MT in hallux valgus patients showed pronation under weight‐bearing (Eustace et al, ; Eustace et al, ; Saltzman et al, ; Okuda et al, ; Collan et al, ; Kim et al, ; Kimura et al, ). These clinical studies suggest that pronation of the 1MT is a key pathology in the hallux valgus; however, there has been no evidence whether pronation of the 1MT occurs in asymptomatic feet due to natural weight‐bearing.…”

Section: Introductionmentioning

confidence: 99%

“…Weight-bearing radiography of the foot is an established and important method of assessment in clinical practice (Eustace et al, 1993;Eustace et al, 1994;Okuda et al, 2007); however, the two-dimensional (2D) analysis using radiography limits the evaluation of the morphological changes of the foot due to weight-bearing because of the foot's complex three-dimensional (3D) structure. To overcome this limitation, CT imaging has been used to analyze the morphological change of the foot under weight-bearing conditions (Collan et al, 2013;Tuominen et al, 2013;Carrino et al, 2014;Kim et al, 2015;Kimura et al, 2017;Watanabe et al, 2017;Barg et al, 2018). In previous studies, CT images were obtained with upright cone-beam CT scanners (Collan et al, 2013;Tuominen et al, 2013;Carrino et al, 2014) or with a conventional CT scanner under simulated weight in a prone position (Kim et al, 2015;Kimura et al, 2017;Watanabe et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…To overcome this limitation, CT imaging has been used to analyze the morphological change of the foot under weight-bearing conditions (Collan et al, 2013;Tuominen et al, 2013;Carrino et al, 2014;Kim et al, 2015;Kimura et al, 2017;Watanabe et al, 2017;Barg et al, 2018). In previous studies, CT images were obtained with upright cone-beam CT scanners (Collan et al, 2013;Tuominen et al, 2013;Carrino et al, 2014) or with a conventional CT scanner under simulated weight in a prone position (Kim et al, 2015;Kimura et al, 2017;Watanabe et al, 2017). Although the effects of weight-bearing and changes in the bone alignment were identified, these studies failed to acquire foot images under physiological weight in a standing position.…”

Section: Introductionmentioning

confidence: 99%

“…Although the effects of weight-bearing and changes in the bone alignment were identified, these studies failed to acquire foot images under physiological weight in a standing position. Either approaches involve single leg standing with the other leg on the gantry (Collan et al, 2013;Tuominen et al, 2013;Carrino et al, 2014) or unnatural weight-bearing in the prone position using conventional CT (Kim et al, 2015;Kimura et al, 2017;Watanabe et al, 2017). Thus, no study has evaluated the structural changes of the foot in the natural standing position.…”

Section: Introductionmentioning

confidence: 99%

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Effect of natural full weight‐bearing during standing on the rotation of the first metatarsal bone

et al. 2019

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To evaluate the rotational change in the first metatarsal bone (1MT) of the foot during natural standing using an upright computed tomography (CT) scanner with 320‐detector rows. A total of 52 feet of 28 asymptomatic subjects (aged 23–39 years) were evaluated in the natural standing position with or without weight‐bearing. A foot pressure plate was used to determine the non‐weight‐bearing (NWB) or single leg full‐weight‐bearing (s‐FWB) conditions. CT examinations were performed using a noise index of 15 for a slice thickness of 5 mm, rotation speed of 0.5 sec, and slice thickness of 0.5 mm. The rotation of the 1MT was measured on the coronal CT image, which cut the sesamoids' bellies in the frontal slide of the first metatarsal and sesamoids perpendicular to the longitudinal bisection of the third metatarsal, and compared between the weight‐bearing conditions. Intra‐ and inter‐observer reliabilities of the rotation angle were also evaluated. The intra‐ and inter‐observer correlation coefficients were 0.961 and 0.934, respectively. The 1MT pronation angle was significantly greater in the s‐FWB condition than in the NWB condition (15.2° ± 5.4° vs. 12.5° ± 5.3°, P < 0.01). No sex difference was found in the magnitude of the 1MT pronation angle as a result of weight‐bearing. This study first demonstrated that pronation of 1MT occurs due to natural full‐weight‐bearing in asymptomatic feet. The 1MT's rotational movement under weight‐bearing conditions may relate to the onset and pathogenesis of the hallux valgus. Clin. Anat. 32:715–721, 2019. © 2019 Wiley Periodicals, Inc.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of natural full weight‐bearing during standing on the rotation of the first metatarsal bone

et al. 2019

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“…The main difference to modern multidetector computed tomography (MDCT) scanners operated in volumetric mode is the use of a flat panel detector and the absence of pre-detector collimation [2, 3]. The resulting simplicity of the CBCT construction facilitates small and mobile machines [4] and weight-bearing applications [5–11]. …”

Section: Introductionmentioning

confidence: 99%

Surface radiation dose comparison of a dedicated extremity cone beam computed tomography (CBCT) device and a multidetector computed tomography (MDCT) machine in pediatric ankle and wrist phantoms

et al. 2017

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ObjectivesTo evaluate and compare surface doses of a cone beam computed tomography (CBCT) and a multidetector computed tomography (MDCT) device in pediatric ankle and wrist phantoms.MethodsThermoluminescent dosimeters (TLD) were used to measure and compare surface doses between CBCT and MDCT in a left ankle and a right wrist pediatric phantom. In both modalities adapted pediatric dose protocols were utilized to achieve realistic imaging conditions. All measurements were repeated three times to prove test-retest reliability. Additionally, objective and subjective image quality parameters were assessed.ResultsAverage surface doses were 3.8 ±2.1 mGy for the ankle, and 2.2 ±1.3 mGy for the wrist in CBCT. The corresponding surface doses in optimized MDCT were 4.5 ±1.3 mGy for the ankle, and 3.4 ±0.7 mGy for the wrist. Overall, mean surface dose was significantly lower in CBCT (3.0 ±1.9 mGy vs. 3.9 ±1.2 mGy, p<0.001). Subjectively rated general image quality was not significantly different between the study protocols (p = 0.421), whereas objectively measured image quality parameters were in favor of CBCT (p<0.001).ConclusionsAdapted extremity CBCT imaging protocols have the potential to fall below optimized pediatric ankle and wrist MDCT doses at comparable image qualities. These possible dose savings warrant further development and research in pediatric extremity CBCT applications.

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CT in Musculoskeletal Applications

Zbijewski

2019

Computed Tomography

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The biomechanics of the first metatarsal bone in hallux valgus: A preliminary study utilizing a weight bearing extremity CT

Cited by 96 publications

References 19 publications

Effect of natural full weight‐bearing during standing on the rotation of the first metatarsal bone

Effect of natural full weight‐bearing during standing on the rotation of the first metatarsal bone

Surface radiation dose comparison of a dedicated extremity cone beam computed tomography (CBCT) device and a multidetector computed tomography (MDCT) machine in pediatric ankle and wrist phantoms

CT in Musculoskeletal Applications

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