Hindfoot issues in the treatment of the cavovarus foot

Ankle and Pantalar Arthrodesis: End-Stage Salvage in Cavus Foot

Bony alignment is the primary goal in foot and ankle reconstruction of the cavovarus foot. This condition presents as a malalignment causing a medial overload of the ankle articular surface and lateral overload of the hindfoot, midfoot, and forefoot. A painful gait associated with articular degeneration of the numerous joints can lead to a chronic and rigid arthrosis of joints, warranting arthrodesis of the affected joints accordingly.

Soft tissue release combined with joint-sparing osteotomy for treatment of cavovarus foot deformity in older children: Analysis of 21 cases

BACKGROUND

Cavovarus foot is a common form of foot deformity in children, which is clinically characterized by an abnormal increase of the longitudinal arch of the foot, and it can be simultaneously complicated with forefoot pronation and varus, rearfoot varus, Achilles tendon contracture, or cock-up toe deformity. Muscle force imbalance is the primary cause of such deformity. Many diseases can lead to muscle force imbalance, such as tethered cord syndrome, cerebral palsy, Charcot-Marie-Tooth disease, and trauma. At present, many surgical treatments are available for cavovarus foot. For older children, priority should be given to midfoot osteotomy and fusion. Since complications such as abnormal foot length, foot stiffness, and abnormal gait tend to develop postoperatively, it is important to preserve the joints and correct the deformity as much as possible. Adequate soft tissue release and muscle balance are the keys to correcting the deformity and avoiding its postoperative recurrence.

AIM

To assess the efficacy of soft tissue release combined with joint-sparing osteotomy in the treatment of cavovarus foot deformity in older children.

METHODS

The clinical data of 21 older children with cavovarus foot deformity (28 feet) who were treated surgically at the Ninth Department of Orthopedics of Jizhong Energy Xingtai Mining Group General Hospital from November 2014 to July 2017 were retrospectively analyzed. The patients ranged in age from 10 to 14 years old, with an average age of 12.46 ± 1.20 years. Their main clinical manifestations were deformity, pain, and gait abnormality. The patients underwent magnetic resonance imaging of the lumbar spine, electromyographic examination, weight-bearing anteroposterior and lateral X-rays of the feet, and the Coleman block test. Surgical procedures including metatarsal fascia release, Achilles tendon or medial gastrocnemius lengthening, "V"-shaped osteotomy on the dorsal side of the metatarsal base, opening medial cuneiform wedge osteotomy, closing cuboid osteotomy, anterior transfer of the posterior tibial tendon, peroneus longus-to-brevis transfer, and calcaneal sliding osteotomy to correct hindfoot varus deformity were performed. After surgery, long leg plaster casts were applied, the plaster casts were removed 6 wk later, Kirschner wires were removed, and functional exercise was initiated. The patients began weight-bearing walk 3 mo after surgery. Therapeutic effects were evaluated using the Wicart grading system, and Meary’s angles and Hibbs’ angles were measured based on X-ray images obtained preoperatively and at last follow-up to assess their changes.

RESULTS

The patients were followed for 6 to 32 mo, with an average follow-up period of 17.68 ± 6.290 mo. Bone healing at the osteotomy site was achieved at 3 mo in all cases. According to the Wicart grading system, very good results were achieved in 18 feet, good in 7, and fair in 3, with a very good/good rate of 89.3%. At last follow-up, mean Meary’s angle was 6.36° ± 1.810°, and mean Hibbs’ angle was 160.21° ± 4.167°, both of which were significantly improved compared with preoperative values (24.11° ± 2.948° and 135.86° ± 5.345°, respectively; P < 0.001 for both). No complications such as infection, skin necrosis, or bone nonunion occurred.

CONCLUSION

Soft tissue release combined with joint-sparing osteotomy has appreciated efficacy in the treatment of cavovarus foot deformity in older children.

Inframalleolar Varus Deformity: Role of Calcaneal Osteotomies

The cavo varus foot is a complex pathology due to skeletal deformity and neuro-muscular unbalance. The key concept for a successful treatment is to consider the whole foot and ankle complex from a bone and soft tissue perspective. Undercorrection is the main issue in cavo varus foot management, which may be attributed to intrinsic correction defects of the described calcaneal osteotomies or to a lack of understanding about the pathology and the subsequent algorithm of treatment. The authors disclose their daily algorithm of treatment, considering the foot and ankle complex and the role of calcaneal osteotomies in ankle inframalleolar deformities.

Treatment of ankle instability with an associated cavus deformity

This article reviews the role of cavus in foot and ankle injury and summarizes the current surgical and nonsurgical treatments. Recognition of foot position is crucial in the management of ankle instability associated with cavovarus. Correcting foot alignment with orthoses or surgery improves the mechanics of the ankle, reducing the risk of instability and potentially delaying the onset of posttraumatic ankle arthritis. Progressive steps in the correction alignment are described, with technical tips and strategies for dealing with chronic instability.

The varus ankle and instability

Varus ankle associated with instability can be simple or complex. Multiple underlying diseases may contribute to this complex pathologic entity. These conditions should be recognized when attempting proper decision-making. Treatment options range from conservative measures to surgical reconstruction. Whereas conservative treatment might be a possible approach for patients with simple varus ankle instability, more complex instabilities require extensive surgical reconstructions. However, adequate diagnostic workup and accurate analysis of varus ankle instability provide a base for the successful treatment outcome.

Neuromuscular deformity: treatment with external fixation

A multiplanar foot deformity is defined by the presence of more than one deformity affecting the foot. These deformities may develop in any plane, including the frontal, sagittal, or transverse planes. This article focuses on the treatment of multiplanar neuromuscular foot deformities with external fixation, reviewing the indications, preoperative planning, techniques, and complications.

Cavovarus foot reconstruction

This article presents a surgical protocol for surgical reconstruction from the subtle cavus foot described by Manoli to the most complicated cases. The goal is to merge together the available surgical options in a comprehensive way to guide surgical decisions.

Salvage of compartment syndrome of the leg and foot

Early diagnosis and treatment of compartment syndrome of the leg or foot is invaluable in avoiding a chronic and often debilitating course. In cases where an ischemic contracture results in pain, disability or soft tissue compromise, surgical intervention is indicated. Thorough physical examination of patients and a thorough understanding of pathomechanics of the foot and ankle are paramount. These combined with a comprehensive preoperative plan and meticulous execution can often provide improved function and decrease pain in patients affected by this debilitating problem.