Aim is to distinguish chracteristics of the pes planus of rheumatoid arthritis from the pes planus of degenerative joint disease.

269 patients with rheumatoid arthritis and 93 patients with degenerative joint disease were evaluated with clinical examination with footprinting for pes planus including calcaneal angle, hallux valgus, range of motion of ankle, loss of metatarsal arch, duration of foot symptom and disease, age and foot pain.

Results were as follows:

1) There was significant increase in the grade of pes planus an increase in the calcaneal valgus, hallux valgus, duration of foot symptom, duration of disease, and patient age in rheumatoid arthritis(p<0.05).

2) There was no significant different of the prevalence between degenerative joint disease and rheumatoid arthritis(p≥0.05).

3) There was no significant correlation between the grade of pes planus and other variables including calcaneal valgus, hallux, valgus, duration of foot symptom, duration of disesae, and patient age in degenerative joint disease(p≥0.05).

Our findings suggest that there are different mechanism in the development of pes planus between rheumatoid arthritis and degenerative joint disease.

Keywords :Pes planus, Rheumatoid arthritis, Degenerative joint disease