Hallux abductovalgus (HAV) or bunion, is a commonly seen deformity of the first metatarsophalangeal joint (MPJ) in which the hallux is abducted and everted, frequently overriding the second toe. Although the terms HAV and bunion are often used synonymously (as is done in this paper), it should be noted that a bunion actually refers to the callus and inflamed adventitious bursa overlying the HAV deformity. Even though bunions have been described in the medical literature for several hundred years (the word bunion is believed to be derived from the Latin, bunio, meaning turnip), there continues to be much controversy concerning its etiology. This is most likely because the development of HAV is multifactorial, stemming from a variety of structural and functional aberrancies.
Contributing factors may include excessive foot pronation, wearing tight and pointed-toe shoes, and occasionally trauma. Joint misalignment causes osteoarthritis with cartilage erosion and exostosis formation, resulting in joint motion being limited (hallux limitus) or eliminated (hallux rigidus). In late stages, synovitis occurs, causing joint swelling. In reaction to pressure from tight shoes, an adventitious bursa can develop medial to the joint prominence, which can become painful, swollen, and inflamed.
Symptoms often include pain, swelling, and abnormal position of the first toe. The technical term for bunions is ?hallux valgus? (HV). This refers to the first toe or hallux moving away or abducting from the middle of the foot and then twisting in such a way that the inside edge actually touches the ground and the outside edge turns upward. This term describes the deviation of the toe toward the outside part of the foot. If left untreated, bunions can worsen over time and cause considerable difficulty in walking, discomfort, and skin problems such as corns. In some cases, a small bursa (fluid-filled sac) near the joint becomes inflamed. This condition is known as bursitis and can cause additional redness, swelling, and pain. Less frequently, bunions occur at the base of the fifth toe. When this occurs, it is called a ?tailor?s bunion? or bunionette.
Looking at the problem area on the foot is the best way to discover a bunion. If it has the shape characteristic of a bunion, this is the first hint of a problem. The doctor may also look at the shape of your leg, ankle, and foot while you are standing, and check the range of motion of your toe and joints by asking you to move your toes in different directions A closer examination with weight-bearing X-rays helps your doctor examine the actual bone structure at the joint and see how severe the problem is. A doctor may ask about the types of shoes you wear, sports or activities (e.g., ballet) you participate in, and whether or not you have had a recent injury. This information will help determine your treatment.
Non Surgical Treatment
Your doctor may recommend a prescription or over-the-counter pain reliever, as well as medication to relieve the swelling and inflammation. A heat pad or warm foot bath may also help relieve the immediate pain and discomfort. A few people may obtain relief with ice packs. If your bunion isn't persistently painful and you take action early on, changing to well-made, well-fitting shoes may be all the treatment you need. Your doctor may advise use of orthoses (devices that are used to improve and realign the bones of your foot), including bunion pads, splints, or other shoe inserts, provided they don't exert pressure elsewhere on the foot and aggravate other foot problems. In some cases, an orthotist (someone trained to provide splints, braces and special footwear to aid movement, correct deformity and relieve discomfort) can recommend shoes with specially designed insoles and uppers that take the pressure off affected joints and help the foot regain its proper shape.
Most bunions can be treated without surgery. But when nonsurgical treatments are not enough, surgery can relieve your pain, correct any related foot deformity, and help you resume your normal activities. An orthopaedic surgeon can help you decide if surgery is the best option for you. Whether you've just begun exploring treatment for bunions or have already decided with your orthopaedic surgeon to have surgery, this booklet will help you understand more about this valuable procedure.