Publications by authors named "Naoya Yazaki"
Article Synopsis
- The study aimed to investigate how carpal ligaments impact wrist movement and if keeping just the dorsal scapholunate ligament (SLL) intact is enough for scapholunate joint stability.
- Methods included analyzing wrist motion and digitizing ligament attachment areas to predict ligament behavior during movement and after simulated injuries.
- Findings showed that certain ligaments stretched minimally, while others showed significant elongation during wrist flexion, but cutting the SLL and dorsal intercarpal ligaments didn't increase joint instability, suggesting that repairing just the dorsal SLL could suffice in treatment.
Article Synopsis
- A propeller flap is a specialized type of tissue flap that rotates around a stationary vascular axis, allowing for better coverage of soft tissue defects, especially in the upper limb.
- Advances in understanding perforator anatomy have led to the development of perforator-based propeller flaps, which can rotate up to 180° and cover defects more effectively than earlier designs.
- A study of 12 patients showed that these flaps are reliable, with most donor sites able to close primarily, although one flap experienced partial loss due to complications.
Article Synopsis
- The study examined the anatomy of the first dorsal compartment of the wrist to see if the extensor pollicis brevis (EPB) tendon has a separate compartment and its ability to extend the thumb's interphalangeal (IP) joint, especially in relation to de Quervain's disease.
- Two groups were analyzed: 90 cadaver wrists and 143 patient wrists with de Quervain's disease who underwent surgery.
- Results showed that a separate compartment for the EPB was more common in de Quervain's patients, and when the EPB could extend the IP joint, it was likely in a subcompartment, indicating a significant relationship between EPB functionality and de Quervain's disease.
Article Synopsis
- The study identifies and categorizes variations in the shape and structure of the capitate bone in the human wrist based on dissections of 107 cadaveric wrists.
- Three distinct types of capitate morphology were found: flat (65%), spherical (22%), and V-shaped (14%), each associated with specific characteristics of the lunate and scaphoid bones.
- The research suggests that understanding these variations could help in addressing wrist-related conditions and outcomes of specific surgical procedures, indicating the need for further investigation.
Long-term denervation of muscles results in fibrosis and fat replacement, which prevent muscles from regaining contractile function despite reinnervation. Therefore, prevention of muscle atrophy between nerve repair and muscle reinnervation may improve the functional outcome. A variety of growth factors play significant roles in muscle mass modulation and muscle regeneration.
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