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Validity and Reliability of a Novel 3D Measurement Approach of the Acetabulum
Author(s) -
Martin Charys M,
Turgeon James G,
Rice Charles L,
Wilson Timothy D
Publication year - 2012
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.26.1_supplement.722.16
Subject(s) - cadaveric spasm , acetabulum , reliability (semiconductor) , medicine , osteoarthritis , orthodontics , radiology , nuclear medicine , computer science , surgery , pathology , power (physics) , physics , alternative medicine , quantum mechanics
The hip joint is a frequent site of osteoarthritis. Advances in diagnosis and treatment are limited due to the lack of reliable measures for quantifying hip morphology. Current diagnostic measures of the hip are performed with predetermined measures in 2D planes, but these do not fully account for morphological variation nor do they utilize 3D capabilities of CT and MR. A valid and reliable measurement modality describing the entire geometry of the hip is necessary for early diagnosis and treatment of hip disease. A 3D measurement approach was developed and proved to be valid and reliable for the proximal femur. The purpose here was to assess the validity and reliability of the same 3D approach on acetabular morphometry. The technique was applied to 45 cadaveric acetabuli (23 Right; 9 Female) and their digitally reconstructed CT models. Preliminary results indicate this measurement approach is not valid with significant differences detected between the cadaveric and digital measurements, p < 0.05. However, the digital measurements had excellent intraobserver reliability (ICC = 0.99) and interobserver reliability (ICC = 0.94). Although this approach was valid and reliable for proximal femora it appears reliable, but not valid for measuring the acetabuli. This result is due to the presence of calcified labra being visualized as bone, and being included in the bone measurements, when measuring the digital models. Grant Funding Source : Departmental Funding