Free online AOFAS hallux MTP-IP score calculator

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American Orthopaedic Foot and Ankle Society (AOFAS) hallux MTP-IP score calculator

About the score:

Originally published in 1994 in Foot and Ankle International, the American Orthopaedic Foot and Ankle Society (AOFAS) Hallux Metatarsophalangeal-Interphalangeal Rating System is a standardized evaluation of the clinical status of the hallux and the first metatarsal.

It incorporates both subjective and objective information. Patients report their pain, and physicians assess alignment. The patient and physician work together to complete the functional portion. Scores range from 0 to 100, with a healthy hallux and first metatarsal receiving 100 points.

This score may be used to assess the first metatarsal, metatarsophalangeal (MTP) joint, proximal phalanx, distal phalanx, and interphalangeal joint levels and may be useful for hallux valgus, hallux varus, MTP arthrosis, hallux valgus interphalangeus, clawtoe, mallet toe, MTP arthrodesis, cheilectomy, MTP implant arthroplasty, MTP resection arthroplasty, MTP instability or dislocation, and intra-articular or extra-articular fractures of the first metatarsal and phalanx. 

Original Literature:

Kitaoka, Harold B., et al. “Clinical rating systems for the ankle-hindfoot, midfoot, hallux, and lesser toes.” Foot & ankle international 15.7 (1994): 349-353.

Validation Literature:

Ibrahim, Talal, et al. “Reliability and validity of the subjective component of the American Orthopaedic Foot and Ankle Society clinical rating scales.” The Journal of foot and ankle surgery 46.2 (2007): 65-74.

Additional Literature:

Schneider, Wolfgang, and Stefan Jurenitsch. “Normative data for the American Orthopedic Foot and Ankle Society ankle-hindfoot, midfoot, hallux and lesser toes clinical rating system.” International orthopaedics 40.2 (2016): 301-306.

About the score developer:

Dr. Melanie Sanders is a board certified orthopaedic surgeon who specializes in foot and ankle surgery. She is affiliated with Franciscan Health, in Mooresville, Indiana.

To view her publications, please visit PubMed.