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Órgano Oficial del Colegio Mexicano de Ortopedia y Traumatología

2024, Number 1

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Acta Ortop Mex 2024; 38 (1)

Frequency of spinopelvic alterations in postoperative total hip arthroplasty patients and their association with functional outcomes

Valdivia-Zúñiga C, Bobadilla-Lescano G, Martínez-Escalante F, Balam-May A, Cámara-Arrigunaga F

Language: Spanish
References: 24
Page: 3-9
PDF size: 235.59 Kb.


ABSTRACT

Introduction: the analysis of spinopelvic imbalance in patients undergoing total hip arthroplasty has gained significance in recent years, being recognized as a risk factor for instability. Few reports exist regarding the prevalence of spinopelvic alterations in Latin American literature. The aim of this study is to determine the frequency of spinopelvic imbalance in our patients and to associate them with functional outcomes. Material and methods: 29 patients who underwent total hip arthroplasty using a lateral approach (32 arthroplasties) were included. All patients completed clinical outcome questionnaires preoperatively. Twelve months after surgery, they underwent anteroposterior pelvic and lateral pelvic X-rays, both standing and sitting, and clinical outcome questionnaires were completed. The radiographic parameters examined were: pelvic incidence, lumbar lordosis, sacral slope, anterior pelvic plane and pelvic femoral angle. Functional outcome was assessed with the Harris Hip Score and WOMAC scales. Patients were classified according to their spinopelvic alteration and statistical analysis was performed to identify significant differences between the groups and the correlation with functional outcomes. Results: there was a high frequency of spinopelvic balance alterations (46.8%); 6.2% (n = 2/32) presented isolated spinal stiffness (group 1B), 37.5% (n = 12/29) spinal deformity without spinal stiffness (group 2A) and 3.1% (n = 1/29) spinal deformity associated with stiffness (group 2B). We found no improvement in HHS and WOMAC scores in the groups with spinal stiffness (1B and 2B) (p = 0.98 y 0.15). There is association between spinal stiffness (ΔSS < 10°) and poor functional outcomes (p = 0.02). Conclusions: the frequency of spinopelvic balance alterations was high. While there was no observed rise in prosthetic dislocations, the existence of spinal stiffness, defined by a ΔSS of less than 10°, was associated to poor outcomes on functional scales.


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EVIDENCE LEVEL

IV




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