Correlation between Pelvic Inclination and Radiological Shape of the Pelvic Cavity.

Doiguchi, Yuichi; Iwasaki, Katsurô; Yamada, Kenji; Takahashi, Kazuhiro; Teshima, Kitau; Sasamatsu, Toshihiro; Tomita, Masato; Narabayashi, Y.

doi:10.5035/nishiseisai.41.641

Cited by 21 publications

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“…The backward pelvic tilting angle was 16 degrees in the male patient and 24 13 to 40 degrees in females in this study. On the other hand, the normal tilting angle was reported as 19.47 6.26 degrees in the male and 24.4 5.93 in females 21 .…”

Section: Resultsmentioning

confidence: 99%

A Radiological Study of Rapidly Destructive Coxarthropathy

Yamaoka

Harada

et al. 2012

Showa Univ J Med Sci

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: Rapidly destructive coxarthropathy RDC is a clinical concept propounded by Postel and Kerboull. RDC is characterized by joint destruction progression within a year, although the etiology of this disorder remains unknown. We evaluated 21 hips in 20 patients radiologically diagnosed with RDC. All patients underwent a total hip arthroplasty. The average age at surgery was 75 years. The affected side was more osteoporotic in all patients, and the pelvic angle, which indicates the spinopelvic alignment, was distributed below the normal range, i.e., the posterior tilt was more than the normal range. The affected side showed a higher center-edge CE angle and anterior-acetabular head index AAHI than the unaffected side, possibly due to severe head collapse. Our result supported that osteoporosis and / or mechanical factors in uence the course of RDC. More investigations such as biochemical and immunopathological analyses would be necessary to clarify the etiology of RDC, which could be a terminal stage of some lesions.

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Section: Resultsmentioning

confidence: 99%

A Radiological Study of Rapidly Destructive Coxarthropathy

Yamaoka

Harada

et al. 2012

Showa Univ J Med Sci

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“…Real wear values were compensated by calculating the difference between the measured diameter of the metal head on radiography and the actual diameter of the inserted femoral head. Pelvic inclination was measured according to the method of Doiguchi et al [9]. Horizontal diameter (T) and vertical diameter (L) of the pelvic cavity on radiography were measured, and pelvic inclination was calculated using the following formulae: −67 × L/T + 55.7 for male hips and −69 × L/T + 61.6 for female hips (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Anatomic Anteversion of the Acetabular Component Correlates with Polyethylene Linear Wear in Total Hip Arthroplasty: The Three-Dimensional Numerical Analysis

Kosukegawa¹,

Nagoya²,

Kaya³

et al. 2016

OJO

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Background: Although abduction of the acetabular component is considered to predict factors for polyethylene wear attributable to osteolysis, other radiographic factors have yet to be elucidated. The purpose of the present study was to evaluate whether anteversion or change in implantation angle of the acetabular component influences polyethylene linear wear by using standing and supine radiographs of the hip joint. Methods: Standing and supine plain anteroposterior radiographs of 62 hip joints in which cementless total hip arthroplasty was performed were examined for polyethylene linear wear rate (mm/year), pelvic inclination, and radiological inclination and anatomic anteversion of the acetabular component. Results: All correlation coefficients of measurements of polyethylene linear wear, pelvic inclination angle, anatomical anteversion angle and radiological inclination angle were calculated highly. And by the three-dimensional numerical analysis, anatomic anteversion of the acetabular component had at least some effect on the degree of polyethylene wear. Conclusion: This study suggests that increased anteversion of the acetabular component reduces polyethylene linear wear in metal-on-polyethylene total hiparthroplasty.

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“…The minor axis of the cup was designated as D 1 and the major axis was designated as D 2 on AP pelvic radiographs, and the angle of anteversion ( α ) was calculated as α = sin −1 ⁡ D 1 / D 2 + 5°. The PTA was calculated using the method of Doiguchi [ 5 , 9 ]. The lateral diameter ( T ) and longitudinal diameter ( L ) of the pelvic cavity were measured on AP pelvic radiographs, and the PTA was calculated as −67 × L / T + 55.7° for men and −69 × L / T + 61.6° for women.…”

Section: Methodsmentioning

confidence: 99%

Influence of Pelvic Tilt on Polyethylene Wear after Total Hip Arthroplasty

Tezuka

Inaba

Kobayashi

et al. 2015

BioMed Research International

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We aimed to evaluate the effects of pelvic tilt on polyethylene wear after total hip arthroplasty (THA). A total of 105 joints treated with primary THA were included; conventional polyethylene (CPE) liners were used in 43 hips and highly cross-linked polyethylene (HXLPE) liners were used in the remaining 62 hips. The pelvis was tilted 6° posteriorly in the standing position as compared to the supine position, which resulted in significant increases of 1.7° and 2.8° in cup inclination in the CPE and HXLPE groups, respectively. Moreover, the change in pelvic tilt resulted in significant increases of 3.6° and 4.9° in cup anteversion in the CPE and HXLPE groups, respectively. For the CPE group, multiple regression analysis showed a significant association between the angle of pelvic tilt (PTA) and cup inclination and the polyethylene wear ratio. The adjusted R 2 of the regression model was larger for measures obtained in the standing position as compared to the supine position. For the HXLPE group, there was no significant relationship between radiographic parameters and polyethylene wear. Close observation of polyethylene wear is recommended for patients with severe posterior pelvic tilt who have undergone THA with conventional polyethylene.

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Correlation between Pelvic Inclination and Radiological Shape of the Pelvic Cavity.

Cited by 21 publications

References 0 publications

A Radiological Study of Rapidly Destructive Coxarthropathy

A Radiological Study of Rapidly Destructive Coxarthropathy

Anatomic Anteversion of the Acetabular Component Correlates with Polyethylene Linear Wear in Total Hip Arthroplasty: The Three-Dimensional Numerical Analysis

Influence of Pelvic Tilt on Polyethylene Wear after Total Hip Arthroplasty

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