Acetabular morphology and resurfacing design

Thompson, Mark S.; Dawson, Tanya; Kuiper, Jan Herman; Northmore-Ball, M. D.; Tanner, K. E.

doi:10.1016/s0021-9290(00)00115-9

Cited by 23 publications

(24 citation statements)

References 21 publications

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“…Our measurements of the rim profile unites and confirms previous reports on irregularities of the outer shape of the acetabulum or of a smaller than hemispheric acetabular size [40,56,[65][66][67][68]. One study denoted four configurations along the anterior rim as curved, angular, irregular, or straight [40].…”

Section: Discussionsupporting

confidence: 89%

“…Violation of this assumption was taken into account adjusting the degrees of freedom with Huynh-Feldt correction. Comparison of our calculated radius with previous studies further suggests validity of our data (Table 6) [7,14,49,56,61,63,65,68]. The interpretation of our 3-D studies of the acetabular opening plane may be limited by the unknown individual pelvic tilt of the archeological specimen.…”

Section: Discussionsupporting

confidence: 81%

“…Such incongruence may have influenced our mathematical calculations. Most previous studies on acetabular measurements similarly assumed sphericity of the acetabulum and are therefore amenable for comparison [51,65,67]. We tested the sphericity assumption with the Mauchly test.…”

Section: Discussionmentioning

confidence: 99%

“…Spatial measurements of the acetabular opening plane in relation to the pelvic frontal plane for version, inclination and tilt in the definition of the acetabular opening plane. A definition of the profile of the acetabular cup by subtended angles was given in a cadaveric study [65]. Sets of paired opposing radial angles subtended by the acetabular rim were summed in four principal directions.…”

Section: Discussionmentioning

confidence: 99%

“…The outer contour of the acetabulum is variable and some have less than hemispheric acetabular shapes [40,56,[65][66][67][68]. A recent study denoted four configurations along the anterior wall as curved, angular, irregular, or straight [40].…”

Section: Introductionmentioning

confidence: 99%

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Acetabular Morphology: Implications for Joint-preserving Surgery

Köhnlein¹,

Ganz

Impellizzeri³

et al. 2009

Clinical Orthopaedics &Amp; Related Research

136

144

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Appropriate anatomic concepts for surgery to treat femoroacetabular impingement require a precise appreciation of the native acetabular anatomy. We therefore determined (1) the spatial acetabular rim profile, (2) the topography of the articular lunate surface, and (3) the 3-D relationships of the acetabular opening plane comparing 66 bony acetabula from 33 pelves in female and male pelves. The acetabular rim profile had a constant and regular wave-like outline without gender differences. Three prominences anterosuperiorly, anteroinferiorly and posteroinferiorly extended just above hemispheric level. Two depressions were below hemispheric level, of 9°at the anterior wall and of 21°along the posterosuperior wall. In 94% of all acetabula, the deepest extent of the articular surface was within 30°of the anterosuperior acetabular sector. In 99% of men and in 91% of women, the depth of the articular surface was at least 55°along almost half of the upper acetabular cup. The articular surface was smaller in women than in men. The acetabular opening plane was orientated in 21°± 5°for version, 48°± 4°for inclination and 19°± 6°for acetabular tilt with no gender differences. We defined tilt as forward rotation of the entire acetabular cup around its central axis; because of interindividual variability of acetabular tilt, descriptions of acetabular lesions during surgery, CT scanning and MRI should be defined and recorded in relation to the acetabular notch. Acetabular tilt and pelvic tilt should be separately identified. We believe this information important for surgeons performing rim trimming in FAI surgery or performing acetabular osteotomies.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Acetabular Morphology: Implications for Joint-preserving Surgery

Köhnlein¹,

Ganz

Impellizzeri³

et al. 2009

Clinical Orthopaedics &Amp; Related Research

136

144

View full text Add to dashboard Cite

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Cams and Pincer Impingement Are Distinct, Not Mixed: The Acetabular Pathomorphology of Femoroacetabular Impingement

Cobb

Logishetty

Davda

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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Background Many impinging hips are said to have a mix of features of femoral cam and an overcovered acetabulum causing pincer impingement. Correction of such a mixed picture by reduction of the cam lesion and the acetabular rim is the suggested treatment. Questions/purposes We therefore asked two questions: (1) Is the acetabulum in cam impingement easily distinguishable from the pincer acetabulum, or is there a group with features of both types of impingement? (2) Is version or depth of socket better able to distinguish cam from pincer impingement? Methods We analyzed the morphologic features of the acetabulum and rim profile of 20 normal, healthy hips, 20 with cams and 20 with pincers on CT. Pelvises were digitized, orientated to the best-fit acetabular plane, and a rim profile was plotted. Results Cam hips were shallower than normal hips, which in turn were shallower than pincer hips (84°± 5°v ersus 87°± 4°versus 96°± 5°, respectively). The rim planes of cam, normal, and pincer hips had similar version (23°, 24°, 25°), but females were 4°more anteverted than males. ConclusionsWe concluded cam and pincer hips are distinct pathoanatomic entities. Cam hips are slightly shallower than normal, whereas pincers are deeper. Clinical Relevance Before performing surgery for camtype femoroacetabular impingement, surgeons should consider measuring the acetabular depth. The cam acetabulum is shallower than normal and may be rendered pathologically shallow by acetabular rim resection leading to early joint failure.

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