Clinical, radiographic, and survivorship analysis of a modular fluted tapered stem in revision hip arthroplasty.

PURPOSE: Modular fluted tapered stems are one of the most commonly used implants in femoral revision surgery. Due to the relative lack of studies on the Restoration modular fluted tapered stem, we conducted a study to evaluate its short- to mid-term clinical, radiographic, and survival outcomes. METHODS: We identified all 45 patients treated with this revision stem at our institution. Five patients did not complete the minimum 2-year follow-up, leaving 40 patients (41 hips) for assessment. Mean follow-up was 5.1 years (range 2-11 years). Clinical outcomes were assessed using the Harris hip score (HHS). Radiographs were evaluated for subsidence and loosening. Kaplan-Meier survival analysis was performed using revision of the stem for any reason as end point. RESULTS: The mean HHS improved from 44.6 points preoperatively to 78.4 points at the most recent follow-up (p < 0.0001). Nonprogressive subsidence occurred in 83% of the hips (mean 2.8 mm; range 1-7 mm). One stem (2.4%) showed progressive subsidence (20 mm) and was considered loose. The most common cause for reoperation was dislocation (three hips, 7.3%). The 10-year survivorship with revision of the stem for any reason as the end point was 93.5% (95% CI, 84.9-100%). CONCLUSION: There was a significant improvement in the HHS and a low likelihood of revision at short- to mid-term follow-up, adding to the current evidence base for use of this implant in revision surgery. A longer follow-up and a larger number of cases are necessary to fully evaluate its role and performance.

Bilateral spontaneous fracturing of the femoral neck in a patient with renal osteodystrophy

We report a case of bilateral fracturing of the femoral neck in a patient with renal osteodystrophy who was treated by means of osteosynthesis. In this type of patient, there is a need to remain watchful for the possibility of occurrences of spontaneous fracturing of the femoral neck, even if the initial radiographic examination is normal...

Relatamos um caso de fratura bilateral do colo femoral em paciente com osteodistrofia renal tratada com osteossíntese. Nesse tipo de paciente, é necessário estar atento à possibilidade de ocorrência de fraturas espontâneas do colo femoral, mesmo com exame radiográfico inicial normal...

Bilateral spontaneous fracturing of the femoral neck in a patient with renal osteodystrophy.

We report a case of bilateral fracturing of the femoral neck in a patient with renal osteodystrophy who was treated by means of osteosynthesis. In this type of patient, there is a need to remain watchful for the possibility of occurrences of spontaneous fracturing of the femoral neck, even if the initial radiographic examination is normal.

Relatamos um caso de fratura bilateral do colo femoral em paciente com osteodistrofia renal tratada com osteossíntese. Nesse tipo de paciente, é necessário estar atento à possibilidade de ocorrência de fraturas espontâneas do colo femoral, mesmo com exame radiográfico inicial normal.

Graduação radiográfica da cimentação de hastes femorais na artroplastia do quadril / Radiographic grading of femoral stem cementation in hip arthroplasty

Objetivo: Determinar a concordância intra e interobservador do sistema proposto por Barrack para graduação da qualidade de cimentação do componente femoral na artroplastia do quadril. Métodos: As radiografias pós-operatórias imediatas em anteroposterior e perfil de 55 artroplastias totais primárias do quadril foram analisadas por dois observadores habituados ao uso deste sistema de graduação. As leituras das radiografias foram feitas em duas ocasiões distintas por cada examinador e de maneira independente. Na análise estatística foi calculado o coeficiente Kappa, que determina o grau de concordância entre testes com variáveis categóricas. Resultados: O coeficiente Kappa intraobservador variou entre 0,43 e 0,68, demonstrando força de concordância moderada a substancial; o coeficiente Kappa interobservador variou de 0,19 a 0,44, demonstrando força de concordância desprezível a moderada. Conclusão: As concordâncias intra e especialmente interobservador são limitadas neste sistema de graduação, mesmo quando utilizado por indivíduos treinados. Nível de Evidência III, Estudo de pacientes não consecutivos; sem padrão de referência “ouro” aplicado uniformemente.

Objective: To determine intra and interobserver agreement of the grading system for femoral cementation in hip arthroplasty proposed by Barrack. Methods: Immediate anteroposterior and lateral postoperative radiographs of 55 primary total hip arthroplasties were assessed by two observers familiar with the use of this grading system. The assessments were performed on two separate occasions by each observer and independently. The statistical analysis measured the Kappa coefficient, which determines the degree of agreement between tests with categorical variables. Results: Intraobserver Kappa coefficient varied from 0.43 to 0.68, demonstrating moderate to substantial strength of agreement; interobserver Kappa coefficient varied from 0.19 to 0.44, demonstrating slight to moderate strength of agreement. Conclusion: Intra and particularly interobserver agreement are limited in this grading system, even when used by trained individuals. Level of Evidence III, Study of nonconsecutive patients; without consistently applied reference ‘‘gold’’ standard.

Radiographic grading of femoral stem cementation in hip arthroplasty.

OBJECTIVE: To determine intra and interobserver agreement of the grading system for femoral cementation in hip arthroplasty proposed by Barrack. METHODS: Immediate anteroposterior and lateral postoperative radiographs of 55 primary total hip arthroplasties were assessed by two observers familiar with the use of this grading system. The assessments were performed on two separate occasions by each observer and independently. The statistical analysis measured the Kappa coefficient, which determines the degree of agreement between tests with categorical variables. RESULTS: Intraobserver Kappa coefficient varied from 0.43 to 0.68, demonstrating moderate to substantial strength of agreement; interobserver Kappa coefficient varied from 0.19 to 0.44, demonstrating slight to moderate strength of agreement. CONCLUSION: Intra and particularly interobserver agreement are limited in this grading system, even when used by trained individuals. Level of Evidence III, Study of nonconsecutive patients; without consistently applied reference "gold" standard.