Ankle Sprain & Instability
The bones in our leg and foot meet to form our ankle joint. The leg contains a large bone, called the Tibia and a small bone called the Fibula. These bones rest on the Talus bone in the foot. The Talus bone is supported by the Calcaneus bone, our heel. Our heels bear 85% to 100% of our total body weight.
Strong tissues, called ligaments, connect our leg and foot bones together. One ligament, called the Lateral Collateral Ligament (LCL), is very susceptible to ankle sprains. The LCL is located on the outer side of our ankle. It contributes to balance and stability when we are standing or walking and moving. The LCL also protects the ankle joint from abnormal movements, such as extreme ranges of motion, twisting, and rolling.
The LCL is composed of three separate bands commonly referred to as separate ligaments. The Anterior Talofibular Ligament is the weakest and most commonly torn, followed by the Calcaneofibular Ligament. The Posterior Talofibular Ligament is the strongest and is rarely injured.
Ankle Sprains are categorized by the amount of injury to the ligaments. A Grade One sprain has minimal impairment. The ligament has sustained slight stretching and some damage to the fibers. A Grade Two sprain is characterized by partial tearing of the ligament. The ankle joint is lax or looser than normal. A Grade Three Spain describes a complete tear of the ligament. The ankle joint is completely unstable.
The treatment of an Ankle Sprain depends on its Grade. Grade One sprains are treated with the RICE method - Rest, Ice, Compression, and Elevation. You should rest your ankle by not placing weight on it. You may use crutches to help you walk. Applying ice packs to your ankle can help keep the swelling down and reduce pain. You should apply ice immediately after spraining your ankle. Your doctor will provide you with a continued icing schedule. Your doctor may recommend over-the-counter or prescription pain medication. Compression bandages, such as elastic wraps, are helpful to immobilize and support the ankle. You should also elevate your ankle at a level above your heart for 48 hours to help reduce swelling.
Care for Grade Two sprains includes applying the RICE method of treatment and in most cases your doctor will prescribe an ankle air cast or soft splint for positioning and stability. As healing takes place, your doctor will gradually increase your activities. Your doctor may recommend that you wear an ankle brace for stability as your healing continues.
In addition to the primary care, your doctor may recommend a short leg cast or a cast-brace system for a Grade Three sprain. The cast is typically worn for two or three weeks and followed by rehabilitation. Rehabilitation is helpful to decrease pain and swelling and to increase movement, coordination, and strength. Your doctor may recommend customized inserts called orthotics for your shoe or special shoes to help you maintain proper ankle positioning.
The recovery time is shorter for ankle sprains that do not require surgery. Grade One sprains may heal in about six weeks. Grade Two and Three Sprains may take several months to heal. Grade Three Sprains usually involve a period of physical therapy to promote healing.
One type of surgery, termed Ligament Tightening, is performed to tighten the overstretched ligaments. This usually involves the Anterior Talofibular Ligament (ATFL) and the Calcaneofibular Ligament (CFL). The surgeon will make an opening over the ligaments and separate the ATFL and the CFL in half. The ends of these two ligaments are surgically attached to the Fibula. The surgeon will further reinforce the ligaments by also attaching the top edge of the Ankle Retinaculum. The Ankle Retinaculum is a large band of connective tissue located at the front of the ankle.
If the ligaments are severely damaged or not appropriate for a Ligament Tightening procedure, the surgeon may perform a Tendon Graft. For this procedure, the surgeon will use a portion of a nearby tendon for a tendon graft. The tendon from the Peroneus Brevis muscle in the foot is most commonly used. The tendon graft is surgically attached to the Fibula and the Talus, near the attachment sites of the original tendon.
In some cases of chronic pain, an Arthroscopic Surgery may be performed to remove bone fragments, scar tissue, and damaged cartilage. Arthroscopic surgery uses a small camera, called an arthroscope, to guide the surgery. Only small incisions need to be made and the joint does not have to be opened up fully. This can shorten the recovery time.
Grade 1 sprains should only experience slight limits to range of motion, and the recovery process is approximately six weeks.
Grade 2 sprains experience moderate impairment and recovery may take a few months.
Grade 3 sprains have severe impairment and may take several months to fully recover. Even after a full recovery, some patients find that swelling still might occur. In most cases, rehabilitation will help restore strength, mobility and range of motion.
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This information is intended for educational and informational purposes only. It should not be used in place of an individual consultation or examination or replace the advice of your health care professional and should not be relied upon to determine diagnosis or course of treatment.
The iHealthSpot patient education library was written collaboratively by the iHealthSpot editorial team which includes Senior Medical Authors Dr. Mary Car-Blanchard, OTD/OTR/L and Valerie K. Clark, and the following editorial advisors: Steve Meadows, MD, Ernie F. Soto, DDS, Ronald J. Glatzer, MD, Jonathan Rosenberg, MD, Christopher M. Nolte, MD, David Applebaum, MD, Jonathan M. Tarrash, MD, and Paula Soto, RN/BSN. This content complies with the HONcode standard for trustworthy health information. The library commenced development on September 1, 2005 with the latest update/addition on April 13th, 2016. For information on iHealthSpot’s other services including medical website design, visit www.iHealthSpot.com.