3-Point Products' Blog

Anatomy of the Wrist

The carpal bones of the wrist make 2 rows of bones, the proximal and distal carpal row. Midcarpal instability (MCI) is related to lack of ligament support between the proximal carpal row and the midcarpal joint (between the 2 rows of bones). Midcarpal instability is most often of palmar type, but can also be considered dorsal or extrinsic depending on the specific ligament(s) involved in causing the instability.

The primary cause of Ulnar Deviation of the Metacarpal Phalangeal joints (MP) of the fingers, a chronic, irreversible condition, is Rheumatoid Arthritis (RA). The MP joints are a primary site of rheumatoid deformities due to several anatomical and bio mechanical factors. Chief among the factors are:

• The shape of the metacarpal head allows for a certain degree of motion in an ulnar direction which contributes to the hands ability to create a strong grip

What causes deformity in the rheumatoid thumb?  

Rheumatoid arthritis (RA) is a destructive inflammatory disease that impacts soft tissue. This disease commonly involves the thumb and causes deformities to the thumb through tendon rupture or tendon subluxation and the abnormal stretching of ligaments and other joint structures.

It’s no secret that Oval-8 Finger Splints are the preferred finger orthosis to treat your patient’s mallet finger, swan neck and boutonniere deformities, trigger finger and trigger thumb, lateral deviation, fractures, arthritis, and hypermobility (EDS).

We are excited to announce improvements to the Oval-8 that make it easier on your eyes and even more comfortable on your patient’s fingers!

The Triangular Fibrocartilage Complex (TFCC) is a group of ligaments and cartilage on the ulnar side of the hand. The TFCC ligaments attach the cartilage to the small wrist bones which also suspend the ends of the two forearm bones, the ulna and the radius.

The distal interphalangeal (DIP) joint is actually the most common location on the body for osteoarthritis (OA). In fact, according to a study evaluating the frequency of hand arthritis, OA at the DIP joint occurs in approximately 58% of individuals age 60 years and older.

Family history, age, a history of heavy manual labor, joint laxity, smoking, and increased weight are all identified as contributors to this disease.The symptoms of OA at the DIP joint commonly include pain and changes to the size and shape of the joint.

What is it and What Are the Characteristics?

Ehlers-Danlos Syndrome (EDS) is a collection of connective tissue disorders, of which the hypermobile type is the most common. Individuals with Hypermobile EDS classically present with hyperextensible joints and skin.

They can often extend their fingers back greater than 90 degrees, place the thumb on the volar forearm, hyperextend the knees and elbows greater than 10 degrees, and place their palms flat on the floor with the knees fully extended.

The CMCcare Thumb Brace by Basko Healthcare contours around the first metacarpal to stabilize the CMC joint and restore proper alignment of the thumb for improved function and pain-free motion. The careful design eliminates pressure in the web space and leaves the ulnar border of the hand free for function. 

The Problem

How to restore the rhythm of the radius and ulnar without constraining motion

Loss of TFC integrity leads to instability of the DRUJ disrupting the rhythm of the radius as it travels around the ulnar styloid. This blog describes how a properly designed orthosis can be employed to restore stability without disrupting the rhythm of the rotating radius.

Clients with lateral epicondylitis (also known as tennis elbow) consistently appear on my schedule. As therapists, we know that swinging the tennis racket is not the only possible cause of this diagnosis. Lateral epicondylitis is due to a degenerative process at the poorly vascularized origin of the wrist extensors on the boney prominence at the lateral elbow. It is often contributed to over use of the wrist extensors. Individuals with this diagnosis often describe pain at the lateral elbow that is persistent, very uncomfortable and limiting.