Anteversion of the Acetabulum and Femoral Neck in Normals and in Patients with Osteoarthritis of the Hip

Reikerås, Olav; Bjerkreim, Ingjald; Kolbenstvedt, A

doi:10.3109/17453678308992864

Cited by 245 publications

(228 citation statements)

References 6 publications

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“…More exacting techniques are a shootthrough lateral radiograph of the pelvis on the CT scanner bed [14], or obtaining a three-dimensional CT scan so that the reconstructed pelvis can be reoriented anatomically before making measurements [1,19]. It is possible that inconsistencies in pelvic orientation explain the conflicting findings between studies that associate hip dysplasia with increased acetabular anteversion [7,12,22,29,42], retroversion [15,27,43,46], or no difference in acetabular orientation [26].…”

Section: Discussionmentioning

confidence: 99%

“…Individualized preoperative planning with understanding of a patient's specific deformity is crucial to proper acetabular reorientation [21,40,46,56]. For example, uncovering of the femoral head by excessive acetabular anteversion or over-covering by retroversion are associated with acetabular dysplasia, hip pain, and development of osteoarthritis, but are addressed differently surgically [2,11,42,43,46,49,52]. Accurate preoperative knowledge of the patient's pathoanatomy requires thorough diagnostic imaging of the hip [3,17,19,34,52].…”

Section: Introductionmentioning

confidence: 99%

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Pelvic Positioning Creates Error in CT Acetabular Measurements

Bosse¹,

Lee

Henderson

et al. 2011

Clinical Orthopaedics &Amp; Related Research

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Background CT allows for accurate measurement of acetabular orientation and shape, but malpositioning of the pelvis may lead to measurement variance. Purpose We therefore sought to determine: (1) whether acetabular anteversion measurements using the femoral head centers differed from those using the posterior ischia, and (2) the extent to which changing obliquity, rotation, and tilt of a pelvis in a CT scanner affected the measurement of acetabular variables. Methods A radiopaque human pelvis model with articulated hips was suspended from a plastic sheet as part of an adjustable frame. Changes in the transverse and sagittal planes created rotation and tilt, while rotating the frame in the coronal plane created obliquity. CT scans were obtained, varying the combinations of obliquity, rotation, and tilt by intervals of 5°, up to 20°. Acetabular anteversion (AA), anterior acetabular sector angle (AASA), posterior acetabular sector angle (PASA), and horizontal acetabular sector angle (HASA) were measured. Results The two methods for measuring AA yielded values differing by 1°to 4°but correlated (r = 0.981) across the spectrum of pelvis positioning. Pelvic obliquity and tilt were linearly associated with changes in the measurements. For each 1°-increase in pelvic obliquity, AA changed À0.4°, and AASA, PASA, and HASA changed 1.93°, 0.99°, and 2.80°, respectively. For each 1°-increase in pelvic tilt, AA changed 0.8°, and AASA, PASA, and HASA changed À1.07°, 0.52°, and À0.51°, respectively. Rotation had no affect on the variables. Conclusions Small changes in pelvic obliquity and tilt were associated with variances in acetabular measurements. The measured changes were directly proportional to the changes in obliquity and tilt, and were additive. Pelvic rotation created no changes in measurement. Clinical Relevance Incorrect interpretation of acetabular anteversion and coverage may lead to unsatisfactory acetabular fragment positioning during reorientational surgery. Although intraoperative positioning of an acetabular fragment may not be as precise as the tools for preoperative planning, it is important for a surgeon to have the most precise data available for planning a procedure, and know where error can occur in collecting the data.Each author certifies that he or she has no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pelvic Positioning Creates Error in CT Acetabular Measurements

Bosse¹,

Lee

Henderson

et al. 2011

Clinical Orthopaedics &Amp; Related Research

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“…There is no groove for the obturator externus tendon crossing the surface of the neck, which is compressed anteroposteriorly (Lordkipanidze et al, 2007). Anteversion (femoral torsion) is 8 , slightly below the mean for most human samples (e.g., Reikeras et al, 1983, mean ¼ 13 , standard deviation 7 , n ¼ 47), but well within the range for modern humans (À5 to þ30 , see Yushiok et al, 1987;Hermann and Egund, 1998) Q3 . The shaft is straight in anterior view and displays the valgus orientation (associated with a high bicondylar angle) typical of hominins.…”

Section: Femur and Patellamentioning

confidence: 91%

Locomotor anatomy and biomechanics of the Dmanisi hominins

Pontzer

Rolian

Rightmire

et al. 2010

Journal of Human Evolution

152

118

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The Dmanisi hominins inhabited a northern temperate habitat in the southern Caucasus, approximately 1.8 million years ago. This is the oldest population of hominins known outside of Africa. Understanding the set of anatomical and behavioral traits that equipped this population to exploit their seasonal habitat successfully may shed light on the selection pressures shaping early members of the genus Homo and the ecological strategies that permitted the expansion of their range outside of the African subtropics. The abundant stone tools at the site, as well as taphonomic evidence for butchery, suggest that the Dmanisi hominins were active hunters or scavengers. In this study, we examine the locomotor mechanics of the Dmanisi hind limb to test the hypothesis that the inclusion of meat in the diet is associated with an increase in walking and running economy and endurance. Using comparative data from modern humans, chimpanzees, and gorillas, as well as other fossil hominins, we show that the Dmanisi hind limb was functionally similar to modern humans, with a longitudinal plantar arch, increased limb length, and human-like ankle morphology. Other aspects of the foot, specifically metatarsal morphology and tibial torsion, are less derived and similar to earlier hominins. These results are consistent with hypotheses linking hunting and scavenging to improved walking and running performance in early Homo. Primitive retentions in the Dmanisi foot suggest that locomotor evolution continued through the early Pleistocene. Dear Author, Any queries or remarks that have arisen during the processing of your manuscript are listed below and highlighted by flags in the proof. Please check your proof carefully and mark all corrections at the appropriate place in the proof (e.g., by using on-screen annotation in the PDF file) or compile them in a separate list.For correction or revision of any artwork, please consult http://www.elsevier.com/artworkinstructions.Articles in Special Issues: Please ensure that the words 'this issue' are added (in the list and text) to any references to other articles in this Special Issue.Uncited references: References that occur in the reference list but not in the text e please position each reference in the text or delete it from the list.Missing references: References listed below were noted in the text but are missing from the reference list e please make the list complete or remove the references from the text. Location in articleQuery / remark Please insert your reply or correction at the corresponding line in the proof Q1Kindly check the affiliations. Q2Please check the hierarchy of section headings. Q3The following references have been changed to match the reference list: " Hermann et al., 1998" to "Hermann and Egund, 1998""Geissman (1986" to "Geissmann (1986)""Harcourt-Smith and Aeillo, 2004" to "Harcourt-Smith and Aiello, 2004". Please verify. Q4Please check the placement of footnotes citations 1e4 have been made at the end of the sentence "Parsing the independent effects." Please c...

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“…Although effective in this new application, MRI does not allow soft tissue transparency around the bone limiting the ability to provide a global visualization of the bony contour. In contrast, computed tomography does not require the injection of an intra-articular dye or the use of an Auto-CAD workstation [ 131 and is already well established in quantifying bony abnormalities of the hip joint [6,31,32] 1 [9,18] with an accuracy of 14.5" [1,6]. Computed tomography is minimally affected by patient positioning on the gantry or experience of the technologist, thus permitting the acquisition of reproducible images between patients.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional computed tomography of the hip in the assessment of femoroacetabular impingement

Beaulé

Zaragoza²,

Motamedi³

et al. 2005

J. Orthop. Res.

303

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Femoroacetabular impingement secondary to the cam effect is thought to be associated with an insufficient anterior concavity in the sagittallaxial plane of the femoral head-neck junction. Using three-dimensional computed tomography the anterior and posterior concavity of the femoral head-neck junction was assessed in 36 painful non-dysplastic hips (30 patients). The mean age of the symptomatic hips was 40.7 with 13 females and 17 males. Eighteen out of the 36 hips had a pistol grip deformity. Magnetic resonance gadolinium arthrography was performed to assess for labral and cartilage lesions. Alpha and beta angles measuring the anterior and posterior femoral head-neck junction concavities were also determined in 20 asymptomatic hips (12 patients; mean age 37, 5 females and 7 males) using three-dimensional computed tomography. The mean alpha angle for the symptomatic and the control group were: 66.4 versus 43.8 0, = 0.001), and for the beta angle 40.2 versus 43.8 0, = 0.01 l), respectively. All but one of the symptomatic hips had a labral tear with 61% of these hips having associated cartilage damage. Three-dimensional computed tomography represents an accurate tool to quantify the femoral head-neck concavity providing a non-invasive assessment of hips at risk of femoroacetabular impingement.

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Anteversion of the Acetabulum and Femoral Neck in Normals and in Patients with Osteoarthritis of the Hip

Cited by 245 publications

References 6 publications

Pelvic Positioning Creates Error in CT Acetabular Measurements

Pelvic Positioning Creates Error in CT Acetabular Measurements

Locomotor anatomy and biomechanics of the Dmanisi hominins

Three-dimensional computed tomography of the hip in the assessment of femoroacetabular impingement

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