Introduction

Metatarsus adductus (MTA) is a condition of children whereby the front part of the foot is curved inward, giving the foot a bean shape. Most cases resolve themselves with plain stretching and casting. Nevertheless, surgery can be done in children or teenagers whose deformities are rigid and severe and who have pain and impaired functions. Although surgery may work, it is not without its dangers. Families considering the surgical option always raise the question of what complications it may have and whether the deformity can recur after the treatment. This article describes the complexities and the recurrence rate after surgical repair of MTA, and the prognosis given after operating on it.

Understanding Metatarsus Adductus

What is Metatarsus Adductus?

Metatarsus adductus involves the front of the foot, and the metatarsal bones are angled towards the Midline.¹ This is unlike clubfoot, which also consists of the heel and ankle. MTA is mild and flexible to severe and rigid. In flexible ones, the foot can be positioned in a straight line even with moderate force. Stiff cases are not easily corrected and can lead to longer-term difficulty when not treated.

Non-Surgical vs. Surgical Treatment

In most infants, there is an improvement through observation, stretching, or some corrective shoes. Other casts require brief times of casting.^1,2 Surgery may only be used where deformity is rigid, severe, or occurs in later childhood and adolescence when symptoms of pain, shoe-fitting difficulty, or limitation of activities occur. The surgical approach differs depending on the patient's age and the extent of the disease.

Types of Surgical Procedures

Soft-Tissue Procedures

Younger children are flexible so that surgeons can perform soft-tissue releases. This entails releasing strain on the ligaments, tendons, or joint capsules in and around the tarsometatarsal joints. This was, in the past, a widespread practice, with many scars and high rates of recurrence as the resultant outcome.^1,2

Bone (Osteotomy) Procedures

Further deformities of rigidity that start to occur in older children and adolescents typically necessitate bony surgical interventions, referred to as osteotomies. These include rearranging and fragmenting bones in the midfoot.^2,3 One of the usual contemporary methods is the combined osteotomies of the medial cuneiform and the cuboid. This straightens the foot without having to balance between the insides and the outsides. Osteotomies tend to have a higher corrective power and fewer recurrence rates than conducting soft-tissue releases.

Complications of Surgery

Short-Term Complications

Swelling, bruising, and post-operative pain are also common after other surgeries and are common short-term afterpains. These usually resolve in a few weeks and are treated by rest, elevation, and painkillers. Temporary stiffness may develop and be mitigated with gentle stretching and physical therapy.⁴

General Surgical Risks

The reasons that might occur after any foot surgery are infection, wound-healing issues, and scarring. Pain may be met in patients with the development of scar tissue as well, particularly in those patients who had to undergo surgery that required an incision along the top of the foot. Today, surgeons have perfected ways to minimise the effects of scarring.^5,6 This may include numbness or tingling at the incision site caused by nerve irritation, which is often temporary.

Bone-Related Risks

The risks are unique to bone surgery in the form of osteotomies. These are a lack of complete correction, excess correction, and the inability of the bones to heal correctly. A nonunion or a malunion may need additional surgery, in which the bone does not heal together or in the proper position.⁶ Hardware, like pins or screws, may sometimes irritate surrounding tissue or migrate, which may require removal.

Deformity-Related Risks

A warning sign is the over-release of soft tissues that may cause a hallux valgus, commonly called a bunion. In other instances, surgery may not necessarily correct fully multi-plane deformities leading to or worsening a skew footing deformity, whereby the forefoot curves medially and the heel outward.^6,7 The results impart a connotation of thorough pre-surgical planning.

Recurrence Rates After Surgery

Historical Recurrence with Soft-Tissue Surgery

Older surgeries with isolated soft-tissue releases recorded high recurrence rates. The reports indicated that more than forty per cent of patients exhibited recurrence, and many still had problems fitting their shoes.¹ Due to these results, soft-tissue surgery is no longer used alone today.

Recurrence After Osteotomies

Modern osteotomy surgery has better results; multiple patients get lasting corrections and high satisfaction. Nevertheless, the recurrence still occurs. In some long-term follow-up studies, it is shown that a certain number of patients relapse after a period of six or more years, whereas others are stable.^1,3 These contradictory findings indicate that relapse is dependent on various factors such as the stiffness of a structure, the age of a patient, and co-morbidities.⁸

Influence of Associated Conditions

When metatarsus adductus is present along with hallux valgus, failure to remedy the metatarsus adductus further exposes an individual to the possibility of bunion recurrence following bunion surgery.^7,8 On the same note, when it comes to complex patients who have been left with residual clubfoot, they have high chances of relapse despite the successfully conducted procedures. Such associations indicate why all deformities should be considered during the surgical plan.

Risk Factors for Complications and Recurrence

Patients with more rigid or advanced deformity are at increased risk of recurrence. Surgery at a young age, at successive ages, where the growth plates are not yet mature, can aggravate the problem, though current surgeries have been structured so that growth plates are cushioned. Accompanying neuromuscular disorders or uncorrected clubfoot deformities make it even tougher to rectify.^3,7,8 Conversely, recurrence risk is minimised when surgeons select the procedure by closely matching it to the patient's deformity, addressing all confounding factors, and providing stable fixation. Compliance of patients with postoperative treatment, such as using casts and braces, also positively affects the outcomes.

Recovery and Rehabilitation

Physical therapy starts with immobilisation in a cast or boot for six to eight weeks. In this time, there is usually limited weight-bearing, or it is pampered with crutches. When the surgeon has confirmed bone healing, the gradual resumption of walking is advised.^8,9 Patients are switched to roomy shoes, sometimes with orthotics as an additional support measure. Physical therapy recovers motion, strength, and balance. Swelling or sensitivity is usually short-lived in children, but adults and adolescents might have persisting effects. It can take many months before athletes can fully resume sports and other activities involving a high impact on the body.

Reducing Risks and Improving Outcomes

Surgeons reduce risks using thorough preoperative planning; they tend to take weight-bearing X-rays, and at times, advanced imagery is used to evaluate the deformity. Complications may be avoided through surgical approaches that do not over-release soft tissue and spare the growth plates.⁹ Fixation procedures that provide stable fixation minimise the incidence of bone healing issues. Patients and families are also key to success as they adhere to the rehabilitation plan, wear suitable shoes, and attend follow-up visits.^9,10 Strict follow-up is needed to ensure early identification of subtle returns and treatment of these returns.

FAQs

Does metatarsus adductus always need surgery?

No. Most children do not need surgery to recover. Only severely rigid or intractable cases demand operative treatment.

What is the most common long-term issue after surgery?

The primary concern is recurrence. Whereas recurrence rates are reduced through newer techniques of osteotomy, a relapse may occur in severe cases or with existing deformities.

Can bunions occur after surgery?

Yes. Bunions are possible complications in case soft-tissue releases cause excessive deformity or improper realignment of the forefoot is performed. Correction of the MTA and bunions in tandem cuts the risk of recurrence.

Will the equipment applied to surgery be attached to the foot?

Specific hardware may be left in permanently, where no issues are raised. Pins or screws used during grafting may be removed when one can be assured that they do not irritate when the healing process is complete.

How long does it take to recover?

The time it takes bones to heal averages six to eight weeks. It might take several months before one returns to sports or strenuous activity. It varies with the age, severity, and type of procedure used.

What should patients do to avoid recurrence?

Adhering to the surgeon's post-operation directions is vital. This covers correct brace/cast application, simple footwear prescription, follow-up visits, and getting on with therapy as recommended.

Is there any long-term outcome?

That depends, but it may differ. Stable correction is demonstrated in several studies for up to several years, whereas in some studies, there is a relapse at extended follow-up. Further study is enhancing knowledge of longer-term outcomes.

Summary

Metatarsus adductus surgery is used on patients with rigid or severe deformity that fails to respond non-surgically. Soft-tissue procedures have traditionally had high recurrence rates and complications, gradually declining into disrepute. The current-day osteotomy-based methods are more successful and present good correction and patient outcomes, yet some patients still have recurrence. Serious complications are infection, scarring, stiffness, nerve pain, problems with bone healing, and hardware difficulties. The most important long-term threat is the recurrence of the deformity. Successful results require meticulous planning of the surgery, patient compliance when all aspects of the deformity are contemplated, and following the treatment. In most patients, surgery secures better results regarding improved function, comfort, and quality of life; however, long-term follow-up is necessary to maintain a stable outcome.