Aim:

To simplify sagittal plane spinal assessment by describing a single novel angle in the lumbar spine equivalent to the difference between pelvic incidence (PI) and lumbar lordosis (LL) and evaluate its reliability.

The management of acute tendo-Achilles (TA) rupture still divides orthopaedic opinion. The advent of minimally invasive endoscopic or percutaneous techniques is thought to allow faster rehabilitation. We report the outcome of 30 patients with acute TA ruptures that have undergone percutaneous repair followed by an accelerated rehabilitation programme with early weight-bearing.

A single centre, prospective cohort study was undertaken. 30 patients (21 men, 9 women; mean age: (40±9 years) with an acute TA rupture were enrolled and followed-up for an average of 12.5±2.9 months. All operations were performed under local anaesthesia, using a modified percutaneous technique, within 2 weeks of injury.

Following surgery, patients were immobilised in an equinus cast for only 2 weeks then allowed to weight bear through a walker boot with 3 heel wedges, which were removed sequentially over a 6-week period. A standardised physiotherapy programme was started 2 weeks post-operatively and continued until 4 months.

The primary outcome measure was the TA re-rupture rate and the Achilles tendon Total Rupture Score (ATRS) at 3 and 6 months.

There were no re-ruptures in the study group. The mean 3- and 6-month ATRS was 57.75 and 86.95 respectively. This improvement was statistically significant (p<0.001). All patients were able to fully weight bear on the operated leg by the eighth week, without the walker boot. At the 6-month follow-up, the average satisfaction rate was 87±7.5%. Patients returned to their pre-rupture sports at an average of 10.4±3 months.

The results of this study demonstrate that minimally invasive repair of acute TA ruptures, combined with an accelerated rehabilitation programme provides a safe and reproducible treatment option.

Introduction

The MITCH PCR is an anatomic, flexible, horse-shoe shaped acetabular component, with 2 polar fins. The rationale of the PCR cup design is to reproduce a near-physiological stress distribution in the bone adjacent to the prosthesis. The thin composite cup is designed to fuse and flex in harmony with the surrounding bony structure. Only the pathological acetabular cartilage and underlying subchondral bone of the horseshoe-shaped, load-bearing portion of the acetabular socket is replaced, thus preserving viable bone stock. The PCR is manufactured from injection moulded carbon fibre reinforced polyetheretherketone (PEEK), with a two layer outer surface comprising hydroxyapatite and plasma sprayed commercially pure titanium. It is implanted in conjunction with a large diameter low wear femoral head, producing a bearing that will generate minimal wear debris with relatively inert particles.

Pre-clinical mechanical testing, finite element analysis and biocompatibility studies have been undertaken. FEA evaluation predicts preservation of host bone density in the load bearing segments. A pilot clinical study was completed on a proto-type version of the PCR cup (the “Cambridge” cup), achieving excellent 5 and 10 year results.