What Is a Triquetral Fracture?

The eight bones in the palm are: boat, moon, triangle, bean, big, small, head, hook. A triangular bone, a cone-shaped bone with the base outward and upward, and the tip inward and downward. The palmar side has an oval-shaped articular surface, which is related to the pea bone.

The eight bones in the palm are: boat, moon, triangle, bean, big, small, head, hook. A triangular bone, a cone-shaped bone with the base outward and upward, and the tip inward and downward. It has an oval joint surface on the palm side, which is related to the pea bone.

Chinese name: Triangle bone
Foreign name: triquetral bone

Nature: Hand bones
Department: hand
Function: Support palm

The physiological position of the triangular bone

It is tapered with the base facing up and the tip down. The upper part is related to the joint disc, the lower part is connected to the crocus, and the palm is connected to the pea bone.

Physiological significance of triangle bone

The upper lateral side is related to the articular disc-related joints of the distal ulnar joint; the medial side is rough with ligament adhesion, and the lower part is uneven, related to the hook bone, and the front has an oval joint surface, which is related to the pea bone; One of the deformed variants occurs at the posterior process of the talus, and is formed by the independent epiphyseal hyaline cartilage. Its occurrence rate is 8% to 10%. It is generally bilaterally symmetrical and appears on the X-ray image. The triangular bone is located at the posterior lower edge of the talus, separated from the talus by a narrow fissure. This bone is generally triangular, but sometimes round and quadrangular.

Triangular carpal triangular cartilage compression test

During talar ossification, the lateral nodules sometimes fail to connect with the talar body. This often results in a triangular bone that may be misdiagnosed as a fracture by an inexperienced radiologist.

Triangular carpal triangular cartilage compression test

The cartilage triangle cartilage compression test is to continuously bump the affected hand toward the ulnar head to check whether pain occurs. It is used to diagnose cartilage triangle cartilage damage. It can consider triangle cartilage damage and ulnar styloid fracture.

Normal value

The test result is negative. No pain was found during the collision.

Clinical significance of triangle

Abnormal result: The test result is positive, that is, the affected hand is constantly bumping toward the ulnar head. If the pain is positive on the ulnar side of the wrist, damage to the triangular cartilage and fracture of the ulnar styloid process should be considered. People to check: People with abnormal pain in the wrist.

Triangular bone matters needing attention

Inappropriate: None.

Contraindications before examination: No special contraindications.

Requirement during inspection: Examine and relax, you should actively face and cooperate with the inspection.

Trigonometry

The patient was sitting. The examiner held the lower end of the forearm with one hand, and the affected hand with the other hand, so that the wrist was flexed at the same time as the ulnar deviation.