Aims

Distraction osteogenesis with intramedullary lengthening devices has undergone rapid development in the past decade with implant enhancement. In this first single-centre matched-pair analysis we focus on the comparison of treatment with the PRECICE and STRYDE intramedullary lengthening devices and aim to clarify any clinical and radiological differences.

INTRODUCTION. Young patients (< 50 years old) have been reported to have a higher risk of revision following total hip arthroplasty (THA) than older patient cohorts, possibly to due higher activity, a higher incidence of deformity and greater probability of prior surgery. Ceramic-on-ceramic bearing surfaces have been proposed for use in young and active individuals due to their low wear, low risk of adverse biologic reaction, and long-term survivorship. We assessed the clinical results and long-term survivorship of uncemented ceramic-on-ceramic THA in a young patient population. METHODS. Between August 1999 and December 2007, 220 total hip arthroplasties in 191 patients under 50 years of age at the time of surgery were performed using alumina ceramic-ceramic bearings as part of a prospective, non-randomized study. All patients received uncemented acetabular components with flush-mounted acetabular liners using an 18 degree taper, and uncemented femoral components. The average patient age at the time of surgery was 42.1 ±7.2 years (range: 17.4 years to 49.9 years), and the average time to follow-up was 10.1 ±2.4 years (range: 4.2 years to 15.2 years). We evaluated implant-related complications and performed Kaplan-Meier analyses to determine survivorship of the THA components with revision for any reason as the endpoint. RESULTS. There were no dislocations or failures due to osteolysis or aseptic loosening. There was one patient death not related to the THA procedure. Through 15-years, the Kaplan-Meier survivorship of all components was 94.9% (CI: ±8.0) with 8 revisions (3.6%) of either the cup, the stem, or both. For the acetabular component, the 15-year survivorship was 97.0% (CI: ±6.1) and included 4 revisions (1.8%), and 98.1% (CI: ±1.9) for the femoral component including 4 revisions (1.8%). One patient had both the femoral and acetabular components revised. There were two liner fractures (0.59%) and one head fracture (0.3%), two of which were sustained as a result of a fall from significant height. There were three failures of osseointegration (1.3%), and one acetabular component dislodged (0.4%) immediately following surgery. Two patients reported non-reproducible squeaking. One hip was revised at an outside institution for unknown reasons. Using the National Institutes for Health and Clinical Excellence (NICE) guidelines, our results are well within the 1% per year acceptable failure rate for this young patient population (acetabular components: 0.1% per year, femoral components: 0.1% per year, all revisions: 0.2% per year). From our experience, ceramic-on-ceramic THA in patients less than 50 years of age is very reliable with a low revision rate and absence of wear-related osteolysis. Component fracture typically occurs with high-energy trauma, and squeaking occurrence is rare in the flush-mounted ceramic liners used in our study. CONCLUSION. Total hip arthroplasty in young patients demonstrates excellent survivorship when uncemented titanium implants are coupled with ceramic-ceramic bearings

Introduction:. Young patients have been reported to have a higher risk of revision following total hip arthroplasty (THA) than older cohorts, possibly to due higher activity and a higher incidence of deformity and prior surgery. Ceramic-on-ceramic bearing surfaces have been proposed for use in young and active individuals due to their low wear, low risk of adverse biologic reaction, and long-term survivorship. We assessed the clinical results and long-term survivorship of uncemented ceramic-on-ceramic THA in a young patient population. Methods:. 341 total hip arthroplasties in 218 patients under 50 years of age at the time of surgery were performed were performed using alumina ceramic-on-ceramic bearings from August 1999 to April 2009 as part of a prospective nonrandomized study. All patients received uncemented acetabular components with flush-mounted acetabular liners using an 18 degree taper and uncemented femoral components. The average patient age at the time of surgery was 41.7 years (range 17.8–49.9 years). The minimum follow-up time was 2 years, (mean 9.1, range 2–13.9). We evaluated implant-related complications and performed Kaplan-Meier analyses to determine survivorship of the femoral and acetabular components with revision for any reason as the endpoint. Results:. There were no dislocations or failures due to osteolysis or aseptic loosening. The 13-year survivorship of all components was 95.9% (CI 91.0–98.2). The 13-year survivorship was 97.4% (CI 92.3–99.1) for the acetabular component and 98.5% (CI 95.3–99.5) for the femoral component. There were two liner fractures (0.59%) and one head fracture (0.3%), two of which were sustained as a result of a fall from significant height. There were three failures of osseointegration (0.88%), and one acetabular component dislodged (0.3%) immediately following surgery. Two patients reported nonreproducible squeaking. One hip was revised at an outside institution for unknown reasons. In conclusion, ceramic-on-ceramic THA in the young patient population is very reliable with a low revision rate and absence wear-related osteolysis. Component fracture typically occurs with high-energy trauma, and squeaking occurrence is rare in the flush-mounted ceramic liners used in our study. Conclusion. Total hip arthroplasty in young patients demonstrates excellent survivorship when uncemented titanium implants are coupled with ceramic-ceramic bearings

Aims

Chronic osteomyelitis (COM) of the lower limb in adults can be surgically managed by either limb reconstruction or amputation. This scoping review aims to map the outcomes used in studies surgically managing COM in order to aid future development of a core outcome set.

Introduction. Historically, amputation or rotationplasty were the treatment of choice in skeletally immature patients. The introduction of expandable endoprostheses in the late 1980s offered the advantages of limb-salvage and limb length equality at skeletal maturity and a promising alternative with improved cosmetic results and immediate weight bearing. Objective. to describe the Rizzoli experience in reconstruction with three different types of expandable prostheses in growing children with malignant bone tumors of the femur, assess the outcome of limb salvage in these patients, analyze survival and complications related to these prostheses used over time. Materials and Methods. Between 1996 and 2010, 39 expandable implants were used in 32 children (16 boys and 16 girls; mean age, 9 years at initial surgery) with bone sarcomas of the femur treated with limb salvage using expandable prostheses. The most common diagnosis was osteoblastic osteosarcoma; all children were classified as having a stage IIB lesion and had preoperative and postoperative chemotherapy. The minimally invasive Kotz Growing prosthesis was used in 17 cases (10 primary implant and 7 revision after failure of non-invasive Repiphysis®), the non-invasive Repiphysis® in 15 cases and Stanmore® expandable prostheses in 7 cases. The mean follow-up was 48 months. Functional evaluation and survival analysis of the children and implants were performed. Results. The rate of implant-related complications was 51.3%; 9 prostheses (23%) were revised because of aseptic loosening, infection and breakage. The mean total lengthening was 26 mm (4 to 165 mm) achieved by 78 procedures (2.4 procedures/patient). Three of the nine children who reached skeletal maturity had limb length equality and six discrepancy of 15–30 mm. The survival of the children was 94% and 76% at 24 and 72 months. The survival of the primary prostheses was 90% and 70% at 24 and 72 months. Survival was significantly higher only for the Kotz compared to the Repiphysis® prostheses (p= 0.026). The mean MSTS score was excellent (79%) without a significant difference between the type of prostheses (p= 0.934). Conclusions. In the growing children expandable prostheses are viable reconstruction options with good and excellent oncological and functional outcome, and limb-length equality at skeletal maturity. Mechanical failures including aseptic loosening and breakage, dysfunction of the expansion mechanism, contractures especially around the knee, dislocation and infection were the most common; some designs have been associated with an unacceptably high inherent risk of complications. However, the non-invasive systems are associated with high complications and failure rates. Early experience is promising, but further study is warranted to determine long-term structural integrity of these newer designs

Aims

This study aims to enhance understanding of clinical and radiological consequences and involved mechanisms that led to corrosion of the Precice Stryde (Stryde) intramedullary lengthening nail in the post market surveillance era of the device. Between 2018 and 2021 more than 2,000 Stryde nails have been implanted worldwide. However, the outcome of treatment with the Stryde system is insufficiently reported.