A randomized prospective study comparing migration of hydroxyapatite and non-hydroxyapatite coated glenoid components using radiostereometric analysis

Akhtar, Ahsan; Ricks, Matthew; Cunningham, Lindsay; Moffatt, Maria; Bale, Steve; Walton, Michael; Monga, Puneet; Trail, IA

doi:10.1053/j.sart.2021.04.001

Cited by 1 publication

(4 citation statements)

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“…Metal-backed components without bone graft usually stabilize at about six months postoperatively. 21…”

Section: Discussionmentioning

confidence: 99%

“…Metal-backed components without bone graft usually stabilize at about six months postoperatively. 21 It is of interest that two patients suffered an acromial stress fracture in the early postoperative period. These patients showed more translation (> 3 mm) and rotation (> 2°) during the initial 12 months.…”

Section: Discussionmentioning

confidence: 99%

“…We have published several papers from Wrightington Hospital reporting RSA studies in patients who have undergone arthroplasty of the shoulder. [18][19][20][21] RSA is considered to be the gold standard for the accurate measurement of micromotion between implant and bone, and is a well-established technique for assessing the migration of implants in these patients. [18][19][20][21][22] It is generally understood that all arthroplasties migrate initially.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20][21] RSA is considered to be the gold standard for the accurate measurement of micromotion between implant and bone, and is a well-established technique for assessing the migration of implants in these patients. [18][19][20][21][22] It is generally understood that all arthroplasties migrate initially. In trabecular metal implants this is due to a period of bone remodelling and osteointegration, usually stabilizing about six months postoperatively.…”

Section: Introductionmentioning

confidence: 99%

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A prospective radiostereometric analysis of the stability of a metal-backed glenoid component/autograft composite in reverse shoulder arthroplasty

Cunningham,

Walton,

Bale

et al. 2023

Bone Joint J

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AimsReverse total shoulder arthroplasty (rTSA) can be used in complex cases when the glenoid requires reconstruction. In this study, a baseplate with composite bone autograft and a central trabecular titanium peg was implanted, and its migration was assessed for two years postoperatively using radiostereometric analysis (RSA).MethodsA total of 14 patients who underwent a rTSA with an autograft consented to participate. Of these, 11 had a primary rTSA using humeral head autograft and three had a revision rTSA with autograft harvested from the iliac crest. The mean age of the patients was 66 years (39 to 81). Tantalum beads were implanted in the scapula around the glenoid. RSA imaging (stereographic radiographs) was undertaken immediately postoperatively and at three, six, 12, and 24 months. Analysis was completed using model-based RSA software. Outcomes were collected preoperatively and at two years postoperatively, including the Oxford Shoulder Score, the American Shoulder and Elbow Score, and a visual analogue score for pain. A Constant score was also obtained for the assessment of strength and range of motion.ResultsRSA analysis showed a small increase in all translation and rotational values up to six months postoperatively, consistent with settling of the implant. The mean values plateaued by 12 months, with no evidence of further migration. In four patients, there was significant variation outside the mean, which corresponded to postoperative complications. There was a significant improvement in the clinical and patient-reported outcomes from the preoperative values to those at two years postoperatively (p < 0.001).ConclusionThese findings show, using RSA, that a glenoid baseplate composite of a trabecular titanium peg with autograft stabilizes within the glenoid about 12 months after surgery, and reinforce findings from a previous study of this implant/graft with CT scans at two years postoperatively, indicating that this type of structural composite results in sound early fixation.Cite this article: Bone Joint J 2023;105-B(8):912–919.

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“…Metal-backed components without bone graft usually stabilize at about six months postoperatively. 21…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%