What condition is the most common cause of swan neck deformity?

Rheumatoid arthritis, cerebral palsy, and physical trauma are the three main causes of swan neck deformity. Some other possible causes may include: untreated mallet finger. a poorly healed fracture in the finger.

Which tendon is affected in boutonniere deformity?

Definition. A Boutonniere deformity is a deformity of the fingers in which the proximal interphalangeal joint (PIP) is flexed and the distal interphalangeal joint (DIP) is hyperextended. It is an extensor tendon injury over zone III.

What causes swan neck deformity in RA?

It is suggested that the usual “intrinsic-plus” hand and the fixed swan neck deformity of rheumatoid arthritis is caused by adhesions between the extensor tendons on the dorsum of the proximal interphalangeal joint, rather than by intrinsic muscle contracture and/or metacarpo-phalangeal dislocation.

Which tendon is involved with mallet finger?

In a mallet injury, when an object hits the tip of the finger or thumb, the force of the blow tears the extensor tendon. Occasionally, a minor force such as tucking in a bed sheet will cause a mallet finger.

What is the difference between mallet finger and swan neck deformity?

Without treatment, the DIP joint droops and won’t straighten out. This condition is called a mallet finger. The extensor tendon may become imbalanced and begin to pull the PIP joint into hyperextension, forming a swan neck deformity. Chronic inflammation from RA can also disrupt the very end of the extensor tendon.

Is mallet finger the same as swan neck deformity?

Mallet finger leads to an imbalance in the distribution of the extensor force between the proximal interphalangeal (PIP) and DIP joints. If left untreated, mallet finger leads to a swan neck deformity from PIP joint hyper extension and DIP joint flexion.

Which of the following injury results from a rupture of the flexor digitorum profundus tendon?

Jersey finger: The condition in which rupture of the flexor digitorum profundus tendon from the distal attachment insertion at the base of the distal phalanx leading no active flexion of the distal interphalangeal joint is known as Jersey finger.

Is swan neck deformity the same as boutonniere?

Boutonniere deformity is a condition that causes extension at the knuckle and DIP joint with flexion at the PIP joint. Visually, this is the exact opposite of swan neck deformity, as Boutonniere deformity makes the finger extend upward at the knuckle, down from the central joint, and up at the fingertip.

Does swan neck deformity go away?

Generally, the swan neck deformity finger can be treated non-surgically using specially designed splints that immobilize the finger and promote natural healing. In cases of fracture, complete bone healing may take 6-8 weeks, followed by physical therapy for strengthening.

How long does a torn tendon in finger take to heal?

The repaired tendon will usually be back to full strength after about 12 weeks, but it can take up to 6 months to regain the full range of movement. In some cases, it may never be possible to move the affected finger or thumb as much as before it was damaged.

Which splint is used for swan neck deformity?

Oval-8 Finger Splints that block hyperextension without limiting flexion are often very successful long-term solutions in patients with mild to moderate Swan Neck Deformity. These comfortable, unobtrusive splints keep the finger in proper alignment and prevent hyperextension at the PIP joint.