Hyperextension of a finger joint beyond the neutral position may result in a painful joint, decreased power when pinching and a delay in being able to bend the finger. Without stabilizing or “blocking” the hyperextension, the deformity can become progressively worse. In addition to looking very abnormal, severe hyperextension can ultimately result in a loss of function because the joint becomes “stuck” in the hyper-extended position.
For Mild to Moderate Hyperextension
Use the SIRIS™ Swan Neck Splint for mild to moderate hyperextension (less than 20 degrees) of the PIP or DIP joint. Worn on the finger or the thumb, the SIRIS™ Swan Neck Splint blocks hyperextension without limiting the joint’s full range of motion. Both proximal and distal portions of the splint are individually sized and elliptically shaped for an exact fit.
For Severe Hyperextension
Use the SIRIS™ Boutonniere Splint for more severe hyperextension (greater than 20 degrees) or when subluxation of the joint is occurring. This splint is worn with the oval spacer under the joint to block hyperextension while allowing full flexion. It positions the two rings farther from the joint for better leverage at a more comfortable angle.
For MP Hyperextension
Use the SIRIS™ EDS Splint to correct hyperextension of the MP joints without blocking flexion. Typically only one EDS Splint located on the middle finger is needed. With the splint centrally located it can help block all fingers from hyperextending during most activities. If needed the EDS Splint can be worn on adjacent fingers. If the little finger MP is hyperextending and/or dislocating you may also want to look at the 2 ½ Buddy Ring to control MP movement.