- OS METATARSALE’NİN ANATOMİK VE ORTOPEDİK ÖZELLİKLERİNİN ARAŞTIRILMASI

OS METATARSALE’NİN ANATOMİSİ

Özet

Background: Structure most affected by the clinical deformities associated with lower extremity is the first metatarsal bone which may cause orthopedic problems and chronic pain on foot, because approximately 80% of the load from the talus and calcaneus is transmitted to the ground via medial arch.

Materials and Methods: Our study was performed on lower extremities of 32 adult patients without any foot deformity, which were amputated due to circulation failure in the Department of Orthopaedics and Traumatology. Firstly, tibia length, foot length and foot width were measured. Subsequently, the dimensions and length of first metatarsus as well as proximal and distal articular surface dimensions of the first metatarsus were measured.

Results: The average values were as follows: tibia length:35,9 cm, foot length:22,7cm, foot width: 8 cm, length of first metatarsus: 5,8 cm. Statistical significance was found among the dimensions of proximal end, dimensions of distal head and the thinnest site of the bone (p≤0,01).

Conclusions: Various external deforming forces cause variations in the medial longitudinal arch and lead foot pain. The length, shape of the head as well as the dimensions of the proximal and distal joint surfaces of the first metatarsus are important factors in the development of foot deformities.

Since peroneus longus and tibialis anterior muscles insert onto the first metatarsus, the forces exerted by their tendons affect morphology of the bone. Therefore, dimensions of these muscles and their tendons in relation with the dimensions of first metatarsus are essential in the prevention and treatment of foot deformities.