Dissociation of modular total hip arthroplasty at the femoral head–neck interface after loosening of the acetabular shell following hip dislocation

Chu, Cheng-Mien; Wang, Shyu-Jye; Lin, Leou-Chyr

doi:10.1054/arth.2001.24448

Cited by 29 publications

(17 citation statements)

References 10 publications

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“…Case reports of dissociation of modular hip stem prosthesis have been published [13][14][15] , and there is one case of a patient who had dissociation of the Alpha II (Osteoimplant Technology, Hunt Valley, Maryland) fully porous-coated stem 16 . The difference between the Alpha II and the implant used in our patient is that the neck-stem junction is much deeper in the implant in the present report.…”

Section: Discussionmentioning

confidence: 99%

Fracture of a Modular Femoral Neck After Total Hip Arthroplasty

Wright

Sporer

Urban

et al. 2010

The Journal of Bone and Joint Surgery-American Volume

144

109

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Section: Discussionmentioning

confidence: 99%

Fracture of a Modular Femoral Neck After Total Hip Arthroplasty

Wright

Sporer

Urban

et al. 2010

The Journal of Bone and Joint Surgery-American Volume

144

109

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“…6 These have been described at the head-neck interfaces. [7][8][9][10][11] The long-term advantages and disadvantages of the modular neck system are not well documented. We therefore investigated whether a modular neck system would give better long-term clinical and radiological results than a non-modular system, and whether there would be complications related to the modular neck.…”

mentioning

confidence: 99%

A modular femoral neck and head system works well in cementless total hip replacement for patients with developmental dysplasia of the hip

Sakai¹,

Ohzono

Nishii

et al. 2010

The Journal of Bone and Joint Surgery. British volume

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We compared a modular neck system with a non-modular system in a cementless anatomical total hip replacement (THR). Each group consisted of 74 hips with developmental hip dysplasia. Both groups had the same cementless acetabular component and the same articulation, which consisted of a conventional polyethylene liner and a 28 mm alumina head. The mean follow-up was 14.5 years (13 to 15), at which point there were significant differences in the mean total Harris hip score (modular/non-modular: 98.6 (64 to 100)/93.8 (68 to 100)), the mean range of abduction (32 degrees (15 degrees to 40 degrees )/28 (0 degrees to 40 degrees )), use of a 10 degrees elevated liner (31%/100%), the incidence of osteolysis (27%/79.7%) and the incidence of equal leg lengths (> or = 6 mm, 92%/61%). There was no disassociation or fracture of the modular neck. The modular system reduces the need for an elevated liner, thereby reducing the incidence of osteolysis. It gives a better range of movement and allows the surgeon to make an accurate adjustment of leg length.

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“…Dissociation can occur during closed reduction of dislocation at two different interface levels: the fixed acetabular shell-polyethylene liner interface [2,[7][8][9][10][11][12][13], and the femoral head-neck interface [2][3][4]. In our case, dissociation occurred at the femoral neckstem interface, with no previous traumatic incidence.…”

Section: Discussionmentioning

confidence: 80%

“…Dissociation at the neck-stem interface is rare. To the best of our knowledge, only three case reports have been published [2][3][4], but they pertained to dissociation at the neck-head interface.…”

Section: Introductionmentioning

confidence: 99%