Idiopathic clubfoot: ten year follow-up after a soft tissue release procedure

Comparison of kinematics and pedobarography findings between the unaffected foot of patients with unilateral clubfoot and controls

PURPOSE

Idiopathic clubfoot (ICF) involves structural abnormalities in the lower extremities. Approximately half of patients have unilateral ICF, which could be due to differences in limb formation. The contralateral unaffected foot may have subclinical ICF. The objectives were to compare ankle and foot kinematics and pedobarography findings between the unaffected foot of patients with unilateral ICF and controls.

METHODS

Eleven children with unilateral ICF (11 unaffected feet, 11.7 ± 3.8 years) and 15 age-matched controls (30 control feet, 11.1 ± 3.0 years) were enroled. Five complete gait trials were performed. Data were collected using ten cameras and a two m long Footscan system and compared between groups using the Wilcoxon rank sum test.

RESULTS

All children with ICF underwent the selective soft tissue release procedure. The unaffected feet showed limited ranges in inversion-eversion and dorsiflexion-plantar flexion on kinematic analysis. There was a delay in landing time in all regions of the foot during heel rise and propulsion. The peak time was achieved significantly later in the unaffected feet compared to the controls. Although plantar pressure parameters were comparable, unaffected feet showed a larger contact area in the midfoot region.

CONCLUSIONS

Gait data on the unaffected foot in unilateral ICF patients do not correspond to those of controls despite an indistinguishable clinical appearance. This could be due to the effect of treatment, the process of foot development, or a combination. The relationship between genetics and gait deviation in patients with unilateral ICF needs further evaluation. The unaffected foot should receive similar attention during follow-up.

Flat-top talus after clubfoot treatment: a literature review

Flat-top talus (FTT) is a complication well-known to those treating clubfoot. Despite this, it receives little attention in textbooks, so our knowledge and understanding can be limited to anecdote and hearsay. In particular, its association with different treatments, especially the Ponseti method, is not well understood. This review provides some clarity on the possible pathoanatomical, radiological and iatrogenic causes of FTT. It summarises its prevalence following different treatments. It is seen after surgery, 'pre-Ponseti' casting and the Ponseti method, and seems least common following Ponseti. Potential surgical management strategies are also discussed.

Results of ala carte Posteromedial Soft Tissue Release in Idiopathic Clubfoot

Introduction

The aim of this study is to assess the outcomes of ala carte posteromedial release in children over two years of age who were not responding to the Ponseti method of treatment of idiopathic clubfoot.

Material and Methods

A retrospective observational study from September 2013 to August 2015 was conducted at a tertiary level medical teaching institution. The clubfeet were classified according to the Harold and Walker classification. Radiographic parameters assessed were the talocalcaneal angle (AP, lateral), talus-first metatarsal angle (AP, lateral) and calcaneal-fifth metatarsal angle. The scar and the functional score, according to Laaveg and Ponseti, were evaluated as outcome measures at the final follow-up.

Results

Twenty-four children with a mean age of 43.7 ± 24.7 months were enrolled in the study. There was a total of 36 clubfeet: 21 (65.6%) with a poor functional outcome; 12 (37.4%) with excellent to good scar in both horizontal and vertical components. There was a statistical significance between the pre-operative and post-operative radiological parameters (p<0.05). None of the patients presented with any limitation of activities of daily living despite the poor functional outcome in many of the children. There was no significant association between the qualities of scar (horizontal, vertical) and the functional outcome with age at presentation, pre-operative Harold and Walker classification and pre-operative radiographic angles.

Conclusion

Surgical intervention in terms of ala carte posteromedial soft tissue release could not produce a good outcome over four years in CTEV. The threshold for surgery in CTEV should be high, given the poor results.

Tibiotalar Incongruency in Clubfoot Treated Operatively Is a Predictor of Worse Outcome at a Mean of 26 Years

The traditional approach to congenital talipes equinovarus (CTEV) has relied on stepwise manipulations, followed by surgery in severe or recurrent cases. The 3 aims of this study were: (1) to report long-term results of clubfoot treated by posterior capsulectomy and selective release (PCSR); (2) to determine the reliability of a visual scale in the assessment of intraoperative tibiotalar incongruency (TTI); and, (3) to assess the role of TTI as a prognostic factor. We reviewed data regarding 95 CTEV (65 patients) treated by PCSR at a minimum follow-up of 20 years. Patients underwent a physical and radiographic examination, and were assessed through multiple clinical scores. The inter- and intraobserver reliability for TTI evaluation was calculated on clinical photographs. Based on TTI, 52 CTEV were divided in 2 groups (30 congruent vs 22 incongruent) and compared. At a mean follow-up of 26.8 (from 24 to 31) years, 52 CTEV (38 patients) were available for the analysis. Functional results were globally satisfactory. The inter- (κ = 0.748) and intraobserver analysis (κ = 0.688) for the TTI visual assessment showed substantial agreement. In patients with incongruency, patient reported outcomes were significantly worse, with also a greater development of subtalar (p = .02), talonavicular and calcaneocuboid arthritis (p < .001 for both). In treating severe CTEV, the surgical PCSR performed in the first year of life obtains satisfactory clinical and patient-recorded outcomes at over 25 years of follow-up. The visual assessment of TTI is reproducible and potentially represents a long-term prognostic factor.

A comparative study of pedobarography and ankle kinematics between children with idiopathic clubfoot after a soft tissue release procedure and controls

PURPOSE

Surgery for idiopathic clubfoot, though limited in indications, should be performed by a selective soft tissue release. Aims of the study were to evaluate the pedobarography and ankle kinematics of the clubfoot post-surgery and compare with controls.

METHODS

Twenty-two patients (33 clubfeet) and 22 normal children (44 feet) were enrolled into the cross-sectional study. Demographic data were recorded. Plantar force measurements and ankle kinematic data were obtained and compared between clubfoot patients and controls by pedobarography and 3-dimensional gait analysis.

RESULTS

Clubfoot patients were operated at an average age of 12.8 ± 8.1 months. The average follow-up was 9.9 ± 3.9 years. Demographic data were comparable between the two groups. The plantar force in clubfoot patients was significantly lower than controls (108.2 ± 86.7 vs. 150.9 ± 73.9 N, p = 0.03). Clubfoot patients demonstrated a longer contact time, larger contact area, lower peak pressure, and force relative to body weight in toe, midfoot, and heel areas. The impulse was comparable between the two groups but the contact area, force, and force time integral concentrated at the midfoot region of the clubfoot. The ankle kinematics in clubfoot patients demonstrated a dorsiflexed position through late toe off. Range of dorsiflexion in the clubfoot was significantly higher than in controls. Foot adduction during stance, limited inversion-eversion, and limited plantar flexion during loading response and toe off were observed.

CONCLUSION

The results underscore the importance of limited soft tissue release during clubfoot surgery. Although the procedure could preserve range of motion at the ankle joint, muscle weakness and flatfoot deformity are prevalent.

Factors Related to Early Recurrence of Idiopathic Clubfoot Post the Ponseti Method

Introduction: Idiopathic clubfoot or congenital talipes equinovarus (CTEV) is managed by the Ponseti method worldwide; however, the recurrence of the deformity is a challenging problem. The purpose was to review the factors associated with early recurrence of CTEV post the Ponseti method. Materials and Methods: During 2011-2016, 34 infants with 52 CTEV, who underwent the Ponseti method and a minimum follow-up period of six months, were reviewed. Twenty-two infants (65%) were male, and 18 infants (53%) had bilateral CTEV. Recurrence of CTEV was defined as a reappearance of at least one of the four components of the deformity. The association between recurrence and factors, including age, gender, bilaterality, family geography, type of principal caregiver, severity at presentation, centre where the Ponseti method was initiated, compliance to foot abduction brace (FAB), practice of stretching exercise, type of FAB, and complications of casting, were evaluated using univariate logistic regression analysis. Results: The median age at initiation of the treatment was 3.4 (IQR; 2.1-12.6) weeks. A median of six (range; 3-12) casts were required. Tenotomy was performed in 32/34 (94%) of cases. Recurrence occurred in 14/52 feet (27%) at an average follow-up period of 2.3±1.1 years. Non-compliance to FAB protocol began at an average age of 11.2±6.5 months, and significantly increased the risk of recurrence during the weaning phase [OR (95%CI)=8.4 (1.2-92.4), p=0.03]. Other factors were not associated with the recurrence. Conclusion: Non-compliance to FAB occurred early during the treatment and related to a risk of recurrence of CTEV. Physicians should encourage the parents and/or guardians to follow the protocol to decrease the risk of recurrence.

What is new in idiopathic clubfoot?

Idiopathic clubfoot has a tremendous worldwide prevalence. If left untreated, the deformity has severely disabling effects on mobility and quality of life. Given its prevalence and significance, numerous studies are published on this condition every year. In this article, we attempt to highlight important themes and findings of studies published on idiopathic clubfoot over the past 3 years.

Evolution of clubfoot deformity and muscle abnormality in the Ponseti method: evaluation with the Dimeglio score

PURPOSE

The modality of progression of the correction along casting sessions of Ponseti method has been poorly investigated and information regarding evolution of muscular abnormalities is missing. The aim of the study was to investigate dynamics of correction of the different components of clubfoot deformity in a clinical setting.

METHODS

In a prospective study, 124 clubfeet consecutively treated by a single orthopaedic surgeon were evaluated with the Dimeglio system at each casting session and score progression was determined.

RESULTS

For each component a typical pattern was recorded. Cavus and medial crease showed a rapid correction. Rotation, adduction and varus corrected gradually and simultaneously. The posterior crease usually persisted until final cast was discontinued. Equinus improved progressively after each cast and then to a larger extent with Achilles tenotomy. The parameter describing poor muscular condition, reported at presentation in 39 feet (31.5%), was the only item showing extremely different dynamics of correction (from rapid and complete resolution to persistence at last cast removal), which could be explained by the large diversity of entities included (hypertonia, imbalance, fatty infiltration, fibrosis, aplasia).

CONCLUSIONS

This study confirmed that dynamics of correction in clinical setting correspond essentially to theoretical principles of Ponseti method. Muscle abnormalities are not uncommon in clubfeet and have great influence on the progression of correction. If abnormalities are recorded, their evolution along the treatment should be monitored. A more objective evaluation would be required.

Medial to posterior release procedure after failure of functional treatment in clubfoot: a prospective study

PURPOSE

Two conservative techniques for clubfoot treatment are still being debated and depend upon the institution's expertise. For >40 years, the current institution has been a pioneer in the development of the physiotherapy method; however, some severe deformities remain resistant to this method which causes pain, sprains, and difficulties wearing shoes. Therefore, a surgical approach was developed simultaneously for the treatment of these residual or recurring clubfeet. The procedure reproduces the same chronological steps by performing forefoot derotation before correcting hindfoot equinus. The aim of the current study was to assess the results of this surgical technique.

METHODS

All clubfeet undergoing surgery between October 1995 and February 2009 were prospectively included. Initial severity was based on Dimeglio's classification and final outcomes on the International Clubfoot Study Group (ICFSG) outcome evaluation system. Last follow-up results were assessed by physical examination and radiographs.

RESULTS

A total of 137 patients with severe clubfeet (mean Dimeglio score 12.0) underwent surgery. At the mean follow-up of 10.8 years, mean ICFSG score was 4.3 (range 0-23), and 12 % required revision surgery. The rate of undercorrection and overcorrection was low (17 pes-plano-valgus ft and 11 ft with undercorrection). Eight feet had a fixed deformity.

CONCLUSIONS

Severe deformities are more resistant to conservative techniques even for institutions with large experience. These deformities require further treatment, including surgery if necessary. The medial to posterior soft-tissue release is a valuable technique with stable results.

LEVEL OF EVIDENCE

Level IV.