Foot: 84000
Ankle: 32000
Combine search: 12500
Is there much, much more research to be done, or is the foot less complicated than the oral cavity?
And 9 out of 10 hits were from fields other than podiatric medicine (plastic surgery, orthopedic surgery, etc). Not that that matters for EBM.
Well there is a number of factors to be considered more so than a simple pubmed search:
1) DPM-based research is not exclusively published in orthopedic journals such as Foot and Ankle International, Clinics in Orthopaedics Related Research, Journal of Bone and Joint Surgery, etc. The large bulk of the research is published in DPM-based journals such as Journal of Foot and ankle surgery, Clinics in Podiatric medicine and Surgery.
2) The number of DPMs compared to Dentists is significantly smaller - statistically the ones that publish is even smaller
3) A lot of the principles that we use in Foot and Ankle surgery today are based out of Orthopaedic literature - specifically foot and ankle literature like some of the aforementioned journals above.
4) A lot of the research pertaining to the practice of podiatric medicine and surgery is published in non-foot and ankle related journals i.e. plastics, dermatology, and even general ortho. The idea is that we adapted a lot of the principles and apply the evidence based philosophy in our practices in dealing with complicated foot and ankle pathology.
The point in all this is that you are essentially comparing Apples to Oranges. Foot and Ankle surgery is a big field and plenty of research is being contributed by DPMs, Orthopaedic Surgeons, Plastic Surgeons, Vascular surgeons, Dermatologists, etc. Today more than ever, there is a push to continue with this research activity because the opportunities are definitely there.