Acetabular revision using trabecular titanium (Delta TT) revision cups: A retrospective case series.

BACKGROUND: The annual rate of primary THA has been increasing with new designs promoting THA in the younger population, therefore increasing rates and complexity of hip revision surgeries. Different types of acetabular defects in hip revisions, usually make the use of primary cementless cups quite difficult. In complex defects, using cages with cemented cups or combining cementless cups with metal augments, are possible reconstruction solutions. The Delta TT acetabular revision system provides a solution to complex defects combining the advantages of both cage construct and primary implants, with modularity that helps restore anatomical hip centre and biomechanics. The aim of this study is to evaluate the short-term results of the use of the Delta TT revision system in acetabular revision surgeries. TYPE OF THE STUDY: A retrospective case series. METHODS: 24 patients underwent acetabular revision using (Delta TT) revision system, from 2018 to 2021. The mean follow-up was 20.75 months. Clinical and functional outcomes were assessed using Harris Hip Score. RESULTS: The use of the Delta TT revision system in acetabular revision surgery provided adequate pain relief, and early patient mobilization. The preoperative HHS mean of 29.88 improved to a mean of 85.21, at the last, follow-up. None of the patients developed periprosthetic infection or loosening or nerve palsy during the follow-up period. CONCLUSION: Short-term clinical outcomes for the use of the Delta TT revision cup system in acetabular revision are encouraging with good functional outcomes and patient satisfaction.

Cemented long versus standard femoral stem in proximal femoral metastasis: a noninferiority single-blinded quasi-randomized clinical trial.

BACKGROUND AND PURPOSE: Proximal femur is a common site for metastasis, it has a significant impact on patient's quality of life, and traditional treatment aims at protecting as much as possible from the femur. However, recent studies have demonstrated increased rate of complications and questioned the need for long stem in this high-risk group. Our purpose is to determine whether standard-length femoral stem is noninferior to long femoral stem in the treatment of proximal femoral metastasis. PATIENTS AND METHODS: Between 2019 and 2021, we prospectively included 24 patients with proximal femoral metastasis leading either to impending or pathological fractures (5 and 19 cases, respectively). We included patients with lesions due to metastasis, lymphoma, or multiple myeloma. Patients were quasi-randomized based on their order of presentation into two groups based on the femoral stem length, cemented standard (group 1) and long (group 2) femoral stem. Oncological complications, survival, stem complications, and functional outcomes were recorded and analyzed using SPSS 25. RESULTS: 24 patients were included in the final analysis, 13 case in group 1 and 11 in group 2, and mean age 57.6 years. Mean follow-up duration was 10 months, and 11 patients died of the whole-study population with mean survival of (10.85 ± 2.23, 8.82 ± 3.6) months in group 1, 2, respectively. The complication rate was higher in the standard group; however, this difference did not reach statistical significance. No difference was found between study groups regarding functional outcomes, except for VAS at 6 months which was higher in standard group. CONCLUSION: We believe that the ubiquitous use of long stem in the management of proximal femoral metastasis should be questioned considering the expected patient survival and low rate of complications associated with the use of standard stem. GOV REGISTRATION NUMBER: NCT04660591.

Early results of trabecular metal augment for acetabular reconstruction in revision hip arthroplasty.

The management of acetabular bone defects presents a challenge in revision total hip arthroplasty (THA). The aim of this study was to assess the early clinical and radiological outcome of revision of acetabular components using trabecular metal cups and augments for acetabular reconstruction. The study included 18 consecutive patients with failed acetabular components after total hip arthroplasty, with acetabular defects that were revised using porous tantalum acetabular components and augments. The mean follow-up was 18 months (range: 12-24). At the most recent follow-up, 6 patients (33%) were graded as having an excellent result, 9 (50%) a good result, 3 (17%) a fair result according to the HHS. The hip centre was restored to its normal position. There were no cases of hip dislocation. One patient had a partial sciatic nerve palsy which had resolved two months postoperatively. Based on these early clinical and radiological results, TM acetabular components and augments for acetabular defects (Paprosky II and III) appear to be a promising solution for this complex situation. We continue to monitor these patients, and a larger series with longer follow-up will be required to determine the long-term outcome of these augments.

The use of a constrained cementless acetabular component for instability in total hip replacement.

Recurrent dislocation after total hip arthroplasty is a disabling complication that can be difficult to treat. We evaluated the early clinical and radiographic outcome associated with the use of a constrained acetabular component for instability in total hip arthroplasty. Fifteen patients underwent either primary or revision total hip arthroplasty with a cementless constrained acetabular component for different indications. The mean patient age at surgery was 57.4 years and the mean clinical and radiological follow-up period was 26.4 months. Clinical assessment was performed by the Harris hip score and at the latest follow up patients reported outcome using the Oxford hip score questionnaire. All radiographs were evaluated for evidence of loosening. Only one patient experienced redislocation with the constrained prosthesis. The average Harris hip score increased from a preoperative mean of 22 (range, 16 - 36) to a postoperative mean of 85 (range, 66-94). Preoperatively, the mean Oxford Hip Score was 48.6, which decreased to 20.5 at the final examination. All but one of the 15 hips had a well-fixed, stable cup. Femoral component stability with bone ingrowth was achieved in 10 cases. A constrained acetabular component is an effective option for the treatment of hip instability in primary and revision arthroplasty in those at high risk of dislocation. The potential for aseptic loosening requires evaluation by long term studies.

Giant cell tumour of the distal radius: wide resection and reconstruction by non-vascularised proximal fibular autograft.

INTRODUCTION: Giant cell tumours of the bone are aggressive and potentially malignant lesions. Juxtaarticular giant cell tumours of the lower end radius are common and present a special problem of reconstruction after tumour excision. Out of the various reconstructive procedures described, non-vascularised fibular autograft has been widely used with satisfactory functional results. MATERIALS AND METHODS: Ten patients with a mean age of 33.4 years, with either Campanacci grade II or III histologically proven giant cell tumours of lower end radius were treated with wide excision and reconstruction with ipsilateral non-vascularised proximal fibular autograft. Host graft junction was fixed with dynamic compression plate (DCP) in all cases. Wrist ligament reconstruction and fixation of the head of the fibula with carpal bones and distal end of the ulna using K-wires and primary cancellous iliac crest grafting at graft host junction was done in all cases. RESULTS: The follow-up ranged from 30 to 60 months (mean, 46.8). At last follow-up, the average combined range of motion was 100.5 degrees with range varying from 60 degrees to 125 degrees. The average union time was 7 months (range, 4 to 12). Non-union occurred in 1 case. Graft resorption occurred in another case. Localised soft tissue recurrence occurred in another case after 3 years and was treated by excision. There was no case of graft fracture, metastasis, death, local recurrence or significant donor site morbidity. A total of 3 secondary procedures were required. CONCLUSIONS: Enbloc resection of giant cell tumours of the lower end radius is a widely accepted method. Reconstruction with non-vascularised fibular graft, internal fixation with DCP with primary corticocancellous bone grafting with transfixation of the fibular head and wrist ligament reconstruction minimises the problem and gives satisfactory functional results.

Resection arthrodesis for the management of aggressive giant cell tumor of the distal femur.

BACKGROUND: Giant cell tumors (GCTs) of bone are aggressive benign tumors. Wide resection is reserved for a small subset of patients with biologically more aggressive, recurrent, and extensive tumors. Wide resection and mobile joint reconstruction are preferable for treating tumors around the knee. In certain situations, resection arthrodesis or an amputation is suggested. In this prospective study we report the outcome of 8 patients of aggressive GCT of lower end of femur treated with resection arthrodesis. MATERIALS AND METHODS: Eight patients with mean age of 37.25 years (range 30-45 years) with Campanacci Grade III (Enneking stage III) giant cell tumors at the distal femur were treated with wide resection and arthrodesis using dual free fibular graft and locked intramedullary nail from January 2003 to January 2008. There were four males and four females patients. The mean follow-up was 48.75 months (range 30-60 months). The functional evaluation was done using the standard system of musculoskeletal tumor society with its modification developed by Enneking et al. RESULTS: At the final follow up the functional score ranged from 20 to 27 out of total score of 30. Graft union was achieved in all cases in a duration mean of 14.5 months (range 12-20 months).One case required secondary bone graft due to delayed union, and one case had superficial wound infection which healed on systemic antibiotics. At final followup, all the patients were disease free. CONCLUSION: Wide resection and arthrodesis in aggressive GCTs of the distal femur with involvement of all muscle compartments is a good treatment option. Resection arthrodesis offers a biological reconstruction alternative to amputation in a special group of patients when extensive resection precludes mobile joint reconstruction.

Cryosurgery and impaction subchondral bone graft for the treatment of giant cell tumor around the knee.

Giant cell tumors are neoplasms of mesenchymal stromal cells with varied manifestations. There is no uniform accepted treatment protocol for these tumors. Curettage, although an accepted method of treatment, carries a high local recurrence rate. Adjuvant therapies including high-speed burr debridement, cryotherapy, and phenol treatment have been advocated to reduce local recurrence. We have used these adjuvants to determine if improved cure rate with improved outcomes could be attained with regard to local tumor control and functional outcome. Twenty-eight cases of proven giant cell tumors of the distal femur and proximal tibia were included in this prospective case series. The lesions were at the upper tibia in 14 cases and the lower femur in 14 patients. The patients were evaluated clinically, radiologically, and by histological examination. Companacci grading and Enneking staging were determined. The treatment was done in the following steps: Curettage and further debridement with a high-speed burr, cryotherapy, impaction of the cavity with subchondral iliac crest bone graft, and, finally, cementation with or without internal fixation. Functional evaluation was done by Enneking's system. The follow-up time was between 24-40 months with a mean of 34 months. The functional results of the procedure were rated as good to excellent with a mean of 93.9%. This technique has the advantages of joint preservation, excellent functional outcome, and low recurrence rate when compared with other treatment modalities. For these reasons, it is recommended as an adjuvant to curettage for most giant cell tumors of bone.

Treatment of diffuse pigmented villonodular synovitis of the knee with combined surgical and radiosynovectomy.

Treatment of extensive diffuse pigmented villonodular synovitis (PVNS) of large joints by isolated surgical resection is unsatisfactory, with high rates of local recurrence. Post-synovectomy adjuvant treatment with external beam radiation therapy or intra-articular injection of radioactive material as yttrium-90 ((90)Y) yielded better results. Between January 2005 and January 2007, 12 patients (eight men and four women aged 19-49 years) with extensive diffuse PVNS of the knee were treated. All patients had an adjuvant post-operative external beam radiation therapy (2,600-3,000 cGy) conventionally fractionated 200 cGy/fraction, five fractions/week, 6-8 weeks after surgery. Mean follow-up time was 27 months (range from 20 to 36 months). All patients were followed up using clinical assessment, magnetic resonance imaging, and plain X-ray. In all patients, neither evidence of disease recurrence nor progression of bone or articular destruction was noted. No complications were noticed after surgery or after post-operative external beam radiation therapy. A combination of debulking surgery using anterior and posterior approach with adjuvant post-operative external beam radiation therapy for extensive diffuse PVNS of the knee joint is a reliable treatment method, with good results in regard to the incidence of local recurrence and functional outcome.