Final answer:
The volar fingertip and finger defects are related to the skin and tissues of the finger's palmar side, while dorsal defects affect the back side. These can be connected to the action of the flexor digitorum muscles in the forearm. Treatment varies based on defect size and complexity.
Step-by-step explanation:
The volar fingertip, volar and dorsal defects of the finger are conditions that may affect the hand's anatomy and function, specifically involving the skin and possibly the soft tissues beneath the skin on the palmar (volar) or back (dorsal) side of the fingers. These defects can arise from trauma, infection, congenital anomalies, or other causes and may necessitate medical intervention, such as surgery, to repair. The anatomical structures related to these conditions include the flexor digitorum superficialis and flexor digitorum profundus, which are present in the anterior compartment of the forearm and are responsible for flexing the three middle fingers at the metacarpo-phalangeal joints and extending them at the interphalangeal joints.
The flexor retinaculum and the carpal bones, such as the trapezium, provide attachment points for these muscles. Treating volar fingertip and finger defects less than 2 cm in size may require different approaches compared to larger or more complex injuries. Dorsal defects will likewise have their own specific treatment protocols.