Dislocations after total hip arthroplasty.

Woo, Raymund; Morrey, B.F.

doi:10.2106/00004623-198264090-00004

Cited by 1,079 publications

(688 citation statements)

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“…In our series, one hip was dislocated and was reduced nonsurgically; it did not recur. The rate of dislocation (one of 10) seems higher than that seen in THAs for degenerative arthritis or avascular necrosis (range, 1%-3%) [29,32,42], but seems comparable to rates in reports of patients who had developmental dysplasia of the hip (range, 5%-11%) [13,14,26].…”

Section: Discussionmentioning

confidence: 51%

“…The abduction angle of the acetabular component was measured as previously described [10]. The anteversion of the acetabular component was calculated using the method of Woo and Morrey [42]. Cups with an abduction angle of 30°or less or 50°or greater with an anteversion angle of 5°or less or 25°or greater were considered as outliers of the optimal cup position [23,43].…”

Section: Methodsmentioning

confidence: 99%

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Total Hip Arthroplasty Performed in Patients with Residual Poliomyelitis: Does it Work?

Yoon

Lee

Yoo

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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Background Patients with residual poliomyelitis can have advanced degenerative arthritis of the hip in the paralytic limb or the nonparalytic contralateral limb. Although THA is a treatment option for some of these patients, there are few studies regarding THA in this patient population. Questions/purposes We therefore reviewed a group of patients with residual poliomyelitis who underwent cementless THA on either their paralytic limb or nonparalytic limb to assess (1) Harris hip scores, (2) radiographic results, including implant loosening, (3) complications, including dislocation, and (4) limb length discrepancy after recovery from surgery. Methods

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Section: Discussionmentioning

confidence: 51%

Section: Methodsmentioning

confidence: 99%

Total Hip Arthroplasty Performed in Patients with Residual Poliomyelitis: Does it Work?

Yoon

Lee

Yoo

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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“…The acetabular cup inclination angle was ascertained by careful review of postoperative AP radiographs (within 6-8 weeks of surgery). The cup inclination was measured using a standardized technique relative to the ischial tuberosity line, as established by Woo and Morrey [36] for uniplanar measurements. The patients with alumina bearing surfaces were divided into three groups according to acetabular cup inclination angle (\ 40°, 40°-50°, [ 50°).…”

Section: Methodsmentioning

confidence: 99%

Does Acetabular Inclination Angle Affect Survivorship of Alumina-ceramic Articulations?

Johansson

Johnson

Zywiel

et al. 2011

Clinical Orthopaedics &Amp; Related Research

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Background Reports in the literature have linked high acetabular inclination angles to increased wear of ceramicon-ceramic bearings. However, many of these studies were only conducted in vitro and did not address the clinical relevance of such findings. Questions/purposes We therefore determined: (1) whether the cup inclination angle influences survival or function in patients with ceramic-on-ceramic implants; (2) the incidence of radiolucencies, osteolysis, and subsidence of ceramic-on-ceramic implants; and (3) whether the survival rate higher for ceramic-on-ceramic THAs than for conventional metal-on-polyethylene THAs.Methods We retrospectively reviewed 537 THAs performed in 512 prospectively followed patients having THA between October 1996 and October 2000. Eleven patients (12 hips) were lost to followup before 2 years, leaving 501 patients (525 THAs); of these, 421 were alumina ceramic-on-ceramic articulations and 104 cobaltchromium-on-polyethylene. The mean age was 54 years. We determined acetabular cup inclination angles, Harris hip scores, Health-Status-Questionnaire-12 scores, and presence and location of any radiolucencies, osteolysis, or radiographic subsidence. We compared survival using the Kaplan-Meier method. The minimum followup was 24 months (mean, 59 months; range, 24-120 months). Results Twenty-two of the 424 THAs (4.2%) were revised. We observed no difference in clinical or radiographic outcomes with respect to cup inclination angles. Radiographically, two loose acetabular components and two femoral components had subsided. The 5-year survival rate was slightly higher for ceramic-on-ceramic bearings (98%) than for metal-on-polyethylene (92%).

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“…However, despite surgical technique and implant design improvements, dislocation continues to be a matter of concern with an incidence of around 3% [6,42] and with important functional and financial consequences [9,43]. Among the patients presenting with an episode of dislocation, approximately one-third may experience recurrence after nonoperative treatment [48]. The outcomes of reoperation for recurrent dislocation have been variable with approximately one-third of patients experiencing redislocation despite a number of proposed methods of surgical treatment [6,11].…”

Section: Introductionmentioning

confidence: 99%