The purpose of this study was to evaluate short-term clinical and MRI outcome of a polycarbonate-urethane meniscus implant for the treatment of medial compartment pain in middle aged patients.

In the younger population, (<40 yrs.) surgical options e.g., allograft transplants and artificial scaffolds are available and have been shown to be effective. For middle aged patients, the clinical benefit from surgical intervention of a degenerated meniscus has only been reported in a fraction of the patients. However, these patients are still too young for more aggressive treatments such as unicompartmental or total knee arthroplasty.

The meniscus implant is a non-degradable polymer-based spacer which is inserted into the medial compartment of the knee between the tibia and femur by a mini-arthrotomy, without requiring attachment or bone resection. It was hypothesized that the implant could relieve pain by restoring the pressure distribution function. This paper presents the first experience of 3 Israeli sites (out of 7 sites participating in the study).

Thirty patients aged 36 to 70 years were treated with the implant after signing an informed consent and meeting the criteria defined in the Ethics Committee approved protocol. All of the patients reported medial knee pain which was associated with either a severely degenerated meniscus (∼25%) or post-meniscectomy knee pain (∼75%). Patients with evidence of grade IV medial articular cartilage loss or instability were excluded from the study. Primary clinical outcome was measured by the KOOS scale over 12 months, with secondary outcomes measured by IKDC subjective, EQ-5D and VAS questionnaires for pain. Serial MRI scans were taken at 6 weeks and 12 months of follow-up to evaluate the condition of the articular cartilage.

The patients included in this study showed a considerable clinical improvement after the procedure. Significant pain relief was indicated by both KOOS pain subscale and VAS scores after 6 months follow up, and patient activity levels were also found to be higher following implantation. The first MRI findings from this study were considered to be promising since no signs of deterioration of the surrounding cartilage or of the device were observed. So far, one case of implant dislocation and two cases of infection have occurred among the 35 patients.

This study was designed to evaluate and obtain reasonable assurance of the safety, effectiveness, and risk/benfit ratio of a novel implant in the treatment of a challenging patient cohort. The short-term outcomes are promising.

The proper management of radial head fractures is difficult and controversial. The radial head is intra-articular, part of the forearm ring and participates in both flexion and extension as well as in pronosupination. Our main goal in treating those fractures is anatomic restoration of the joint surface and early mobilization. Excision of the radial head, a well described procedure, may result in elbow instability and proximal migration of the radius. In this work we tried to avoid those complications by either conserving the head (ORIF) or by using a Radial head prosthesis.

Material and Methods: 20 Patients were enrolled into the study between 2003–2004. They were divided into 2 groups. 10 patients had ORIF and in patients the Corin Radial head prosthesis was used. Post-op all patients started immediate CPM. All patients were followed-up for 12–28 months (average 18.6). XR were taken each time and clinical examination was done, ROM was noted as well as muscle strength. Elbow stability was tested only on the 2^nd month post op. Patient satisfaction was noted based of their function ability, and the amount of pain. Pain was rated on a scale of 1–10.

Results: Both groups passed the surgery uneventfully. No neurovascular damage nor infection were noted. In clinical examination the elbow was found to be stable in both groups. Decreased ROM in compare with the other elbow was found in both groups, but was more prominent in he ORIF group. One patient in the ORIF group in which biodegradable rod was used developed moderate synovitis that passed without intervention after 9 weeks. XR reveled that one patient in the ORIF group developed Heterotopic ossification, no dislocation or subluxation of the prosthesis was seen. Regarding to pain, in the ORIF group the patients rated their pain as milder in compare to those in the prosthetic group.

Conclusions: Both methods result in stable elbow but the ORIF group showed tendency to experience less pains and the prosthesis group showed tendency to better ROM.

In the last years there has been a new enthusiasm for the use of resurfacing THA. With the experience gained we have learned that there are some absolute and relative contraindications (i.e. inflammatory arthritis, AVN, poor bone stock, sever distortion of thehip anatomy, varus neck, small head). In order to over come those contraindications and in the light of the fact that reliable long-term effectiveness of hip replacement in young active patients remains problematic we have started to use metaphyseal prosthesis. The metaphyseal implant minimizes bone resection, violets less the native bone of the proximal femur, has favorable remodeling characteristics and facilitate revision once needed. Due to its small size and the varus orientation limited or minimal approach is easy and safe.

Material and methods: The Mayo Conservative hip was used in 65 patients during the years 2000–2005. 3 patients were lost to follow-up and were not included. Avrage age was average 44.6. The basic etiology was osteoarthritis (38), AVN (12), RA (4), DDH (4), distorted proximal femur (2) and revision after failed resurfacing THA (2). Follow-up was 6–58 months (average 45.2). XR were taken each time and clinical examination was done, gait pattern was noted as well as ROM and muscle strength Patient satisfaction was noted based on their function ability, using of waking aids and the amount of pain.

Results: We had 2 cases of intraoperative proximal femur crack that were treated with tension wire; no other intraoperative complication was noted. None of the patients developed infection and no one had dislocation. Pain was reduced from sever in all patients to mild or none in 90% (56/62), moderate in 8% (5/62) and sever in one patient (2%). Pre operative ROM was reduced and painful. Painless, near normal ROM was achieved in all patients and only 5 needed walking stick (all of them between 6–12 month post operative). Follow-up XR showed no sign of bone subsidence or loosening

Conclusions: Metaphyseal prosthesis can be a good alternative to resurfacing arthroplasty. Our experience show that the procedure is safe and medium term results are good to excellent.

The incidence of comminuted proximal femur fractures is increasing, due to the growing proportion of elderly people in the general population. Severely depleted cancellous bone in the femoral head and neck prevent stable proximal purchase, mandatory for intertrochanteric and subtrochanteric fractures. Osteoporotic bones are associated with high implant failure rates, evidenced by cutout and upward screw penetration of the hip joint.

A new method for femoral head fixation is described. The peg consists of a distal end that can expand in diameter from 7.8mm to 10.5mm by using pressurized saline, allowing good abutment into the femoral head. The peg may be connected to a side plate or an intramedullary device for inter or subtrochanteric fractures.

Materials and Methods: Ten femoral heads were retrieved from patients who underwent hip hemiarthroplasty due to subcapital fracture. The heads were covered with a transparent epoxy resin until full solidification was obtained. An 8mm drill-hole was used to drill from the distal femoral neck along the femoral head axis, not penetrating the subchondral bone and cartilage. Afterwards, 1.4mm drill was used to penetrate the cartilage and subchondral bone of the femoral head for insertion of a pressure gage. Intraosseous pressure measurements were then recorded. The peri-prosthetic bone density was evaluated by Dual Energy X-ray Absorptiometry (DEXA) and Microradiography Computer Analysis in two stages: 1) with the peg unexpanded, and 2) with the peg expanded. In addition, Instron 8871 tested axial load, pullout and rotatory strengths of the peg.

Results: Increased periprosthetic bone density following peg expansion was demonstrated on DEXA and microradiography with no increase in the intraosseous pressure. The friction coefficient of the bone implant interface, calculated by axial load measurements, was less than the coefficient of steel to steel. Pullout and rotatory strengths were as good as those reported for the Dynamic Hip Screw (DHS).

Conclusions: Bone stock preservation due to compression of the depleted cancellous bone (rather than removed bone by drilling) may improve the mechanical properties of the periprosthetic bone and the stability of the fixation. Due to the strong abutment of the peg, hardware failure, mainly bone cutout can be reduced. Due to its lower friction coefficient, the hip peg will begin to slide following axial load through the plate or the intramedullary device, rather than penetrating the femoral head.

Preliminary positive results indicate that this new method may be suitable for inter or subtrochanteric femoral fracture fixation.

Purpose of the Study: To determine the efficacy of using the Fixion Intramedullary Nail System – an inflatable, unreamed, self locking nail in humeral pathologic fracture stabilization. To our knowledge no clinical reports regarding this subject have been published.

Patients and Methods: The medical record and radiographs, of 14 patients treated with the “Fixion” Nail, since October 1999, for pathological or impending humeral fractures, were reviewed. Patients included 6 male and 8 female with mean age of 58.8 years (35–83). Skeletal survey or routine radiograms made diagnosis. Patients harboring tumors were evaluated with isotope bone scan. Loss of approximately 33% of the bone substance was the criteria for nailing procedure consideration. Nine acute pathological fractures and 5 impending fractures were treated. The fracture’s site distribution per distal, medial and proximal humeral shaft were as following: 1, 11, 2, accordingly. Nine patients were operated on via antegrade and 5 via retrograde.

All surgeries were minimally invasive using a single 2–4 cm skin incision.

Results: Excellent humeral anatomical reduction and stabilization were achieved in all patients. Reaming was needed in 4 patients (28.5%). No interlocking screws were used. Significant relief of pain and regained functionality were demonstrated. Average surgical time was 32.7 minutes (20–55). Mean X-Ray radiation time was 4.07 minutes (0.5–6.15). No wound dehisces or other complications were reported.

Conclusion: The unreamed in most of the cases, no interlocking screws, minimal invasiveness and high stabilization capacities in addition to perfect torsion resistance confer to this nail the ideal qualities to be used with excellent results in pathological fractures. Oncological patients that might be immunosuppressive due to different administered therapies could benefit from reduced postoperative infection rate because of minimizing entry point for infection.