Introduction: The Kudo total elbow prosthesis (TEP) is a well established implant, with good mid-term results. In the last decades this implant underwent several modifications. The last modification (type 5) has overcome the problems of stem breakage of the humeral component by modifications of the stem. The ulnar component can be placed with or without cement; the humeral component is always placed without cement.

Aims of this study: To examine the mid-term results of the Kudo type 5 TEP and to compare the results of the uncemented Kudo total elbow prosthesis (TEP), with the hybrid Kudo TEP (uncemented humeral component and cemented ulnar component).

Material and methods: Between 1994 and 2004 89 Kudo type 5 TEPs were placed for joint destruction due to rheumatoid arthritis (RA). The mean age of the patients was 55 years (range 21–84 years). Twenty-two prostheses were placed in males, 66 in females. Forty-nine TEPs (group 1) were fully uncemented and 40 TEPs (group 2) were hybrid (humeral component uncemented, ulnar component cemented). The groups were comparable as related to age, sex and indication for surgery. After implantation of the prosthesis a radiograph was made every two years or sooner when indicated.

Evaluation took place after an average of 5.3 years of follow up (range 1.7–10.6 years) and consisted of a questionnaire, elbow function assessment and anteroposterior and lateral radiographs in a standard way. Pre- and postoperative range of motion was analysed with the paired T-test. Pain scores and EFAS scores postoperatively were analysed using the independent sample T-test. The survival of the prosthesis was calculated from the time of implant to the time of revision or occurrence of radiolucencies.

Results: In group 1, seven ulnar components had to be revised due to aseptic loosening after a mean follow-up of 4 years (range 1.5–6.3 years). Three of these ulnar components were short-stemmed, four were long stemmed uncemented.

In group 2 five patients died of an unrelated course and no revisions have taken place, one TEP is loose on X-ray (after two years) with a suspicion of septic loosening The EFAS scores (87 in group 1 and 91 in group 2) and range of motion (84 degrees in group 1 and 90 degrees in group 2) were the same in both groups.

Conclusion: In this group of patients with RA the survival of the Kudo type 5 TEP with cemented ulnar component is better as compared to the uncemented ulnar component.

Introduction: Total ankle prostheses (TAP’s) are implanted for end stage cartilage damage especially in patients with rheumatoid arthritis (RA), juvenile idiopathic arthritis (JIA) or post-traumatic arthritis. Little is known about the long term survival of these prostheses in patients with RA and JIA. In this study we examined the outcome of TAP in these patients.

Patients and methods: Between 1994 and 2004 85 TAP’s were implanted in 58 cases (10 males and 48 females) with RA (n=53) or juvenile chronic arthritis (n=5). The records of all patients were reviewed. Every patient was invited for a visit to our outpatient clinic for a history taking, a physical examination and a Kofoed ankle score (a clinical score for ankle function ranging from 0 to 100) was obtained.

Results: The record of every patient was available for review. Two patients had died (cause of death was unrelated to the surgery), and 56 patients could be reexamined. A perioperative fracture (8 medial 3 lateral and 2 tibial) occurred in 13 cases. The fractures were fixed in the same operation and healed without complications; none of these prostheses needed a reintervention. After a mean follow up of 2.7 years (range 1 to 9 years) two patients died with the prosthesis in situ, one patient underwent an above knee amputation for infected arthroplasties of ankle and knee and four prostheses were removed because of loosening or malfunctioning of the prosthesis and arthrodeses were performed. The other 51 cases were analysed and showed a mean Kofoed ankle score of 72.8 (SD=15.8). This score is similar to scores obtained from patients receiving ankle arthroplasties for non-rheumatic indications.

Conclusions: Placement of total ankle prostheses in patients with RA shows good medium term results. The intra-operative fracture rate is high, but does not affect the outcome; none of the failed arthroplasties was due to a preoperative fracture.

Introduction: The standard procedure when operating the rheumatoid forefoot is resection arthroplasty of the metatarsophalangeal joints of the lesser rays. Correction of the hallux is mostly achieved by arthrodesis of the first metatarsophalangeal joint. Good clinical results (with a follow-up of over ten years) have been reported when a combination of these two techniques is used. Another technique is repositioning of the metatarsophalangeal subluxation or dislocation of the lesser rays, thereby preserving the metatarsophalangeal joints, thus leaving the function of the aponeurosis plantaris intact. As a result of this it can be expected that unrolling of the forefoot is unaffected and therefore a better function of the forefoot remains.

Aim: To assess the results of forefoot reconstruction using the repositioning technique performed in 54 feet (39 patients) by one surgeon using this technique.

Methods: Fifty-four feet (39 RA patients) were treated with the technique of repositioning the metatarsophalangeal subluxation or dislocation. All surgery was performed by one orthopaedic surgeon. In case of severe deformity of the metatarsophalangeal joint of the hallux, an arthrodesis was performed. All patients were reviewed after a mean follow up of 40 months (range 12–72 months) and an AOFAS [American Orthopaedic Foot and Ankle Society] foot score, and FFI [Foot Function Index] were obtained.

Results: At a mean of 40 months (SD=15.6 months) postoperatively, the mean AOFAS forefoot score was 69.80 (SD=11.8) if, in addition of repositioning the metatarsophalangeal joints, an arthrodesis of the hallux was performed. In patients with no operation on the hallux, the AOFAS score was 42.2 (SD=18.8) (P=0,001). The postoperative FFI-scores were 74.0 (SD=17.5) and 57.6 (SD=14.6) respectively (P=0,026)

Conclusions: Reconstruction of the rheumatoid forefoot by repositioning the metatarsophalangeal joints of the lesser rays, thereby preserving the joints, can be considered a procedure that provides improvement in the clinical outcome. Best results were seen in patients in whom, in addition of reconstruction of the lesser rays, an arthrodesis of the hallux was performed.