AnetteTheilerのブログ

Overview

A bunion is a very common foot deformity that develops over the first metatarsal phalageal joint of the big toe of the foot. The joint that joins the big toe to the foot is called the first MTP joint. When it becomes prominent and the big toe starts to become crooked this is known as a bunion. The term referring to deformity of the big toe as it becomes crooked is called Hallux Valgus. It is the bump itself that is known as the bunion. When it gets red and swollen over the bunion because it gets sore this is usually due to an inflamed soft tissue over the underlying bone.

Causes
Bunions are most often caused by an inherited faulty mechanical structure of the foot. This faulty structure causes the drifting of the great toe and the bone to become prominent on the side of the foot. The skin then gets pinches by this bony prominence and the shoe. Therefore in most cases bunions are not caused by tight shoes but are made more painful by tight shoes. End stage bunions may become painful both in and out of shoes.
SymptomsSymptoms include pain in and around the ball of the big toe, usually from the bone rubbing too much against the shoe. You may be unable to wear certain types of shoes due to the shape of the forefoot. The big toe appears to be bent inwards towards and in come cases over the inside toe.

Diagnosis
Generally, observation is adequate to diagnose a bunion, as the bump is obvious on the side of the foot or base of the big toe. However, your physician may order X-rays that will show the extent of the deformity of the foot.

Non Surgical Treatment
There are two ways to treat this pathological foot conditions, conservatively and surgically. Conservative treatment is the first line treatment which consists of splints and orthotic care to reduce the causative factors. Realigning the foot with the aid of an orthotic helps prevent further degeneration and/or reduce symptoms of HAV in any stage of its deformity. Along with orthotic care, patients may require debridement of corns and calluses produced due to extra forces produced on the foot. Orthotics will also help the function of the big toe joint as it allows it to bend in the correct position. Footwear advice is also essential in the conservative care of bunions, HAV, there may be a need to change footwear, so it is able to fit properly and be compliment with orthotics. Surgical correction of bunions, HAV is available, however should only be considered when conservative care has failed to reduce the onset of bunions, HAV. It is only considered if there is a clear sign that it will induce a better quality of life for the patient.


Surgical Treatment
Arthrodesis involves fusing together two bones in your big toe joint (metatarsophalangeal joint). The procedure is usually only recommended for people with severe deformities of the big toe joint, which make it too difficult for doctors to completely fix the joint, or when there's advanced degeneration of the joint. After arthrodesis, the movement of your big toe will be severely limited and you won't be able to wear high heels. An excision arthroplasty involves removing the bunion and the toe joint. A false joint is created by scar tissue that forms as a result of the operation. The procedure involves pinning the joint in place with wires, which will be removed around three weeks after surgery is carried out. An excision arthroplasty can only be used in certain circumstances, and is usually reserved for severe, troublesome bunions in elderly people.