Aims

Our aim was to assess the effectiveness of a protocol involving a standardised closed reduction for the treatment of children with developmental dysplasia of the hip (DDH) in maintaining reduction and to report the mid-term results.

Purpose

To investigate the effect of soft tissue release (STR) and the length of postoperative immobilisation on the long term outcomes of closed reduction (CR) of the hip for developmental dysplasia of the hip.

Introduction: The Ilizarov external fixator has theoretical advantages over conventional revision surgery for the treatment of recurrent clubfoot deformity. The aim of this study was to assess the outcome of such treatment.

Materials & Methods: Patients were reviewed clinically and completed extensive questionnaires documenting pain, function and satisfaction before and after the frame at a mean follow-up of 44 months (range 14–131). All patient notes and radiographs were reviewed.

Results: There were 42 frames applied to 40 feet in 31 patients. Deformity was idiopathic in 29 cases. Pain and function scores after treatment improved in 67% and 72% of cases respectively. A subjective increase in stiffness was noted in 46%. Patient satisfaction with outcome was 61%. Pain and function scores were not significantly different in stiff versus non-stiff feet. The overall recurrence rate was 44%; these feet had been treated with the Ilizarov fixator at a younger mean age (7.8 years) than those feet which did not recur (12.6 years). Recurrence was highest in the idiopathic group (59%) compared with the constriction band group (17%) and the neuromuscular/syndromic group (0%), despite the fact that the idiopathic group were older overall. 71% of recurrences experienced significant pain post treatment, compared with only 36% of non-recurrent feet. Functional ability was, however, similar in the two groups. Further surgical treatment has currently been necessary in 6 patients, including 4 repeat Ilizarov frames. Complications included almost universal minor pin-site infections, flexion contractures of the toes in 5 feet and skin ulceration in 2 feet, 1 requiring a muscle flap.

Conclusions: Treatment of the relapsed clubfoot with the Ilizarov fixator can improve the appearance of the foot, correlating with improvement in pain and function. Risks include recurrence, particularly in young, idiopathic feet, an increase in stiffness of the ankle, which has implications for future surgery, and other complications.

Introduction: The management of severe slipped upper femoral epiphysis (SUFE) is controversial. Many types of operation have been advocated. The cuneiform osteotomy offers the potential to restore normal anatomy and hence reduce the development of osteoarthritis, but it is not without its risks. This aim of this study was to quantify the long-term clinical & radiological results of Fish’s cuneiform osteotomy at skeletal maturity.

Method: Twenty-seven patients underwent a cuneiform osteotomy between 1990 – 2003. Two patients were lost to follow-up. Therefore 25 hips in 24 patients were reviewed at a mean follow-up of 8 years and 3 months. The mean slip angle was 77 ± 13 degrees and all were categorized as unstable. Sex distribution was equal and the average age at follow-up was 21.5 years (range 14 – 31 years). The Iowa hip-rating, Harris Hip Score and radiographic classification of degenerative joint disease according to Boyer et al.,¹ were determined at follow-up.

Results: The mean Iowa hip-rating at follow-up was 93.7 ± 7.7 with a mean range of motion score of 8.1 ± 1.8. The Harris Hip Score was 95.6 ± 5.9. Nineteen patients were classified as Grade 0 on Boyer’s radiographic assessment, four Grade 1 and two Grade 2. Correction to neutral ± 10 degrees was achieved in all patients. The rate of avascular necrosis was 12 % and chondrolysis 16 %.

Discussion: Cuneiform osteotomy for severe SUFE is a valid treatment option and complication rates were no higher than other operative interventions reported in the literature. Patients enjoyed an excellent range of motion and were extremely satisfied with the outcome. The restoration of anatomy equates to better function and possibly the delay in onset of osteoarthritis.

We reviewed prospectively, after skeletal maturity, a series of 24 patients (25 hips) with severe acute-on-chronic slipped capital femoral epiphysis which had been treated by subcapital cuneiform osteotomy. Patients were followed up for a mean of 8 years, 3 months (2 years, 5 months to 16 years, 4 months). Bedrest with ‘slings and springs’ had been used for a mean of 22 days (19 to 35) in 22 patients, and bedrest alone in two, before definitive surgery. The Iowa hip score, the Harris hip score and Boyer’s radiological classification for degenerative disease were used.

The mean Iowa hip score at follow-up was 93.7 (69 to 100) and the mean Harris hip score 95.6 (78 to 100). Degenerative joint changes were graded as 0 in 19 hips, grade 1 in four and grade 2 in two. The rate of avascular necrosis was 12% (3 of 25) and the rate of chondrolysis was 16% (4 of 25). We conclude that after a period of bed rest with slings and springs for three weeks to gain stability, subcapital cuneiform osteotomy for severe acute-on-chronic slipped capital femoral epiphysis is a satisfactory method of treatment with an acceptable rate of complication.

Avascular necrosis is a serious complication of slipped capital femoral epiphysis and is difficult to treat. The reported incidence varies from 3% to 47% of patients. The aims of treatment are to maintain the range of movement of the hip and to prevent collapse of the femoral head. At present there are no clear guidelines for the management of this condition and treatment can be difficult and unrewarding.

We have used examination under anaesthesia and dynamic arthrography to investigate avascular necrosis and to determine the appropriate method of treatment. We present 20 consecutive cases of avascular necrosis in patients presenting with slipped capital femoral epiphysis and describe the results of treatment with a mean follow-up of over eight years (71 to 121 months). In patients who were suitable for joint preservation (14), we report a ten-year survivorship of the hip joint of 75% and a mean Harris hip score of 82 (44 to 98).

Introduction and Aims: Recurrence of clubfoot deformity occurs in up to 25% of cases following surgery. The Ilizarov fixator has theoretical advantages over conventional revision surgery in feet with scarred tissue planes, abnormal anatomy and impairment of local blood supply. In addition, limb-length discrepancy can be addressed simultaneously.

The aim of the study was to assess the outcome of treatment of recurrent clubfoot deformity using the Ilizarov frame.

Method: There were 39 feet in 31 patients with at least 12 months follow-up. All patients completed questionnaires documenting pain, function and shoe-size before and after the frame. Twenty-six feet were reviewed clinically. Patient notes and radiographs of all patients were examined. The average period of follow-up was 48 months (14–131 months).

Results: Pain scores improved in 69%, with similar improvement in activity level, walking distance and walking surface. In 20 feet there was improvement in the type of shoes worn. Twenty patients felt their feet were stiffer after the frame. Patient satisfaction with outcome was 74%. A plantigrade foot was achieved initially in all, but deteriorated with time, so that at clinical review only 46% had plantigrade feet. A straight medial border was seen in 81%. The range of movement of ankle and sub-talar joints decreased after the frame. Recurrent deformity was present in 38%, being more likely in younger patients, but in only a few, has further surgery been necessary to date. Complications included minor pin-site infections, flexion contractures of the toes, revision of the frame and revision of one osteotomy.

Conclusion: Treatment of relapsed clubfoot with the Ilizarov frame improves the appearance of the foot, correlating with improvement in pain, function and shoewear. This must be balanced against an increase in stiffness of the ankle, which has implications for future surgery, and the risk of complications inherent in the technique.

37 patients (38 hips) underwent sub-capital osteotomy for slipped upper femoral epiphysis (SUFE) between 1980 and 1999. All slips were severe, and 28 (74%) were unstable. Patients were followed-up at a mean 6. 9 years (range 2. 2–20 years) to identify the relationship between the timing of surgery and complications.

Stable slips underwent urgent elective operations. Unstable slips, admitted as emergencies, were operated upon following two different protocols. 17 cases underwent the Dunn procedure on the next available list at a mean 1. 7 days after admission. 21 cases underwent the Fish procedure after a mean 22. 2 days of bedrest on “slings and springs”.

Of 23 patients (24 hips) who suffered no complications and for whom on Iowa Flip Score was available, the means score was 96. 5 (range 91–100). There were 6 cases of Avascular Nervosis (AVN) (16%), all occurring after unstable slips, and 4 cases of chondrolysis (10%).

Amongst unstable slips, shorter periods of pre-operative bedrest were associated with a higher incidence of avascular necrosis (AVN) (p< 0. 025). Direct comparison of the two surgical procedures showed no statistically significance difference in the incidence of AVN.

Sub-capital osteotomy is valid treatment for severe SUFE. More than 20 days of pre-operative bedrest decreased the incidence of AVN in unstable SUFE

Valgus extension osteotomy (VGEO) is a salvage procedure for ‘hinge abduction’ in Perthes’ disease. The indications for its use are pain and fixed deformity. Our study shows the clinical results at maturity of VGEO carried out in 48 children (51 hips) and the factors which influence subsequent remodelling of the hip. After a mean follow-up of ten years, total hip replacement has been carried out in four patients and arthrodesis in one. The average Iowa Hip Score in the remainder was 86 (54 to 100). Favourable remodelling of the femoral head was seen in 12 hips. This was associated with three factors at surgery; younger age (p = 0.009), the phase of reossification (p = 0.05) and an open triradiate cartilage (p = 0.0007). Our study has shown that, in the short term, VGEO relieves pain and corrects deformity; as growth proceeds it may produce useful remodelling in this worst affected subgroup of children with Perthes’ disease.

After open reduction for developmental dysplasia of the hip (DDH), a pelvic or femoral osteotomy may be required to maintain a stable concentric reduction. We report the clinical and radiological outcome in 82 children (95 hips) with DDH treated by open reduction through an anterior approach in which a test of stability was used to assess the need for a concomitant osteotomy. The mean age at the time of surgery was 28 months (9 to 79) and at the latest follow-up, 17 years (12 to 25). All patients have been followed up until closure of the triradiate cartilage with a mean period of 15 years (8 to 23).

At the time of open reduction before closure of the joint capsule, the position of maximum stability was assessed. A hip which required flexion with abduction for stability was considered to need an innominate osteotomy. If only internal rotation and abduction were required, an upper femoral derotational and varus osteotomy was carried out. For a ‘double-diameter’ acetabulum with anterolateral deficiency, a Pemberton-type osteotomy was used. A hip which was stable in the neutral position required no concomitant osteotomy.

Overall, 86% of the patients have had a satisfactory radiological outcome (Severin groups I and II) with an incidence of 7% of secondary procedures for persistent dysplasia including one hip which redislocated. The results were better (p = 0.04) in children under the age of two years. Increased leg length on the affected side was associated with poor acetabular development and recurrence of joint dysplasia (p = 0.01). The incidence of postoperative avascular necrosis was 7%. In a further 18%, premature physeal arrest was noted during the adolescent growth spurt (Kalamchi-MacEwen types II and III). Both of these complications were also associated with recurrence of joint dysplasia (p = 0.01). Studies with a shorter follow-up are therefore likely to underestimate the proportion of poor radiological results.

The surgical treatment of Perthes’ disease by femoral or innominate osteotomy is not as effective in those over the age of eight years as it is in the younger child. This has prompted the search for other types of management in those who are older. The preliminary results of the use of a lateral shelf acetabuloplasty for such cases have shown encouraging results at two years. The concern with such an operation is that it might interfere with the growth of the outer aspect of the acetabulum and so prejudice the long-term outcome. We describe a review at maturity of 26 children presenting with early disease after the age of eight years who were treated by lateral shelf acetabuloplasty. The results suggest that the outcome is improved; 22 of 27 hips were rated as Stulberg groups 1 to 3. Poor results occurred in children, particularly girls, presenting with Group-4 disease over the age of 11 years.

We treated 37 infants with 53 idiopathic club feet by posterolateral release alone at a mean age of 2.4 months. They were reviewed after a mean follow-up of 10 years 7 months. Both function and appearance were studied. Seventeen feet had required further surgery, at an average of four years after posterolateral release. In all cases hindfoot equinus had been well corrected; the mean ankle dorsiflexion at review was 15 degrees. Most feet showed subtalar joint movement of between 50% and 75% of normal. Four feet showed poor results: one had a stiff subtalar joint, two feet in one child showed fixed forefoot varus, and one foot had required a Dillwyn-Evans operation at 5.5 years. The overall reoperation rate of 32% at ten years suggests that a radical release operation is not necessary in all patients. Of 59 patients who had only a simple posterolateral release 27 (46%) have satisfactory results.

Upper femoral osteotomy is a recognised treatment for selected patients with Perthes' disease. The results of this procedure were investigated at skeletal maturity in 44 patients (48 hips). The indication for operation was Catterall group II, III, and IV hips with 'head-at-risk' signs. Harris and Iowa scores were calculated clinically, and each hip was assigned radiographically to one of the five Stulberg classes, its initial Catterall grading checked and other relevant indices measured. Results showed excellent clinical function. Shortening was present in 14 hips (29%) and a positive Trendelenburg's sign was seen in 12 (25%). On radiographic assessment 58% of hips were Stulberg class I or II, with a good prognosis. The results of femoral osteotomy were better than those for conservatively treated hips in all age groups except those under five years.

It is now clear that vitamin K1 is part of a biochemical cycle that is essential for the conversion of specific bone peptides into a form that can bind calcium. We have used a recently described procedure for assaying vitamin K1 in plasma to test the involvement of this vitamin in fracture healing. Markedly depressed circulating levels were found in patients with fractures and the time taken for this level to return to normal appeared to be influenced by the severity of the fracture.

We report the clinical and radiographic results of the Chiari pelvic osteotomy in 49 hips (45 patients) at an average of 14 years after operation. Of these hips, over half had minimal or no pain, had good or excellent results as assessed by the Harris hip score, and could walk at least three miles; three-quarters, however, had a positive Trendelenburg sign. A younger age at operation and a painless hip with no radiographic evidence of degeneration before operation were associated with a higher hip score at review. The percentage of hips without degenerative changes fell from 68% before operation to 15% at final review. There were no major complications and it was found that a Chiari osteotomy need not interfere with normal childbirth.