Double acetabular wall—a misleading point for hip arthroplasty: an anatomical, radiological, clinical study

Abstract

Purpose Despite the great attention focused on cup positioning in primary total hip arthroplasty (PTHA), it is surprising to find so few studies that have dealt with cup placement. A common thwarting problem for correct cup placement during PTHA is the existence of osteophytes, which obscure the anatomical landmarks. In this study we aimed to evaluate the morphology of acetabular osteophyte formation in patients with osteoarthritis. Method We evaluated 276 patients with hip complaints, using plain X-rays and CT scans. Results Of these patients, 57 underwent surgery. We developed a staging system for central osteophytes in hip osteoarthritis based on the radiographic and anatomical findings of our patients. Conclusion We recommend routine use of CT scans for patients scheduled for PTHA in order to assess the stage of osteophyte before surgery and, thus, reduce the risk of failure resulting from the interrupted acetabular landmarks.

Calculating the hip center of rotation using contralateral pelvic anatomy

“…As a result the true hCoR is unknown during the revision operation and the two methods may be useful for preoperative planning in this group of patient. Patient with severe osteoarthritis develop a medial acetabular wall formed from acetabular osteophytes . This medial wall is likely to lateralise the hCoR.…”

“…Patient with severe osteoarthritis develop a medial acetabular wall formed from acetabular osteophytes. 15 This medial wall is likely to lateralise the hCoR. While the methods may be useful to estimate the true hCoR (pre-osteoarthritis) in these patients, the exact degree of hCoR lateralisation caused by hip osteoarthritis has not been studied and may be minimal.…”

What MRI Findings Predict Failure 10 Years After Surgery for Femoroacetabular Impingement?

“…2). These parameters represent either degenerative signs from the classic literature [11,14,21,25,32,35,42,47,70] or known secondary degenerative lesions in patients with MRIs [33,37,48,55,58,60]. We included only parameters that seemed readily identifiable.…”

“…. 2A-M A total of 13 degenerative patterns seen in the MRA have been evaluated to find an association with conversion to THA, progression of osteoarthritis, or a HHS of \ 80 (the arrows highlight the features): (A) cockscomb osteophyte[21,25,47]; (B) posteroinferior osteophyte[21,25,47]; (C) perifoveolar osteophyte[21,25]; (D) herniation pit[18,48,54]; (E) sabertooth osteophyte[35,42,70];…”

Anterior decompression with single segmental spinal interbody fusion for Denis type B thoracolumbar burst fracture: a midterm follow-up study

“…The percentage of vertebral body height loss was reported as fractions of anterior height between fractured vertebra and normal height of the adjacent vertebra below the fractured vertebra [10]. Other parameters of interest were the visual analogue scale (VAS) pain score [11], Frankel grade and adjacent segment degeneration (University of California at Los Angeles Grading Scale [12]), which were also evaluated at final follow-up.…”