A nine-member expert consensus panel proposes replacing all prior flatfoot terminology and classification systems with a single unified framework. The paper addresses what to call the condition and how to stage it — answering both the naming and the classification problem in one document. Level V evidence (expert opinion); no outcomes data reported.
Every time you reach for 'PTTD Stage II' in a note or operative report, you are using a framework that nine of the field's top foot and ankle surgeons unanimously declared incomplete and unvalidated.
The PCFD system changes how you examine the patient: assess flexibility first (Stage I vs. II), then characterize each anatomic region independently (Classes A through E in any combination). A patient is not simply 'Stage II' — they are, for example, 1AD2C, which tells you the hindfoot is flexible, peritalar subluxation is present, but the forefoot varus component is rigid.
Do not operate on a patient because you expect them to progress to a higher stage. The authors are explicit: progression is non-linear, and the surgical trigger is pain refractory to nonoperative care, not anticipated stage advancement.
The spring and deltoid ligaments are central to the pathomechanics. Always evaluate them. The PTT-centric model misses patients whose deformity is driven primarily by ligamentous insufficiency without any tendon rupture.
A nine-member expert consensus panel proposes replacing all prior flatfoot terminology and classification systems with a single unified framework. The paper addresses what to call the condition and how to stage it — answering both the naming and the classification problem in one document. Level V evidence (expert opinion); no outcomes data reported.
Every time you reach for 'PTTD Stage II' in a note or operative report, you are using a framework that nine of the field's top foot and ankle surgeons unanimously declared incomplete and unvalidated.
The PCFD system changes how you examine the patient: assess flexibility first (Stage I vs. II), then characterize each anatomic region independently (Classes A through E in any combination). A patient is not simply 'Stage II' — they are, for example, 1AD2C, which tells you the hindfoot is flexible, peritalar subluxation is present, but the forefoot varus component is rigid.
Do not operate on a patient because you expect them to progress to a higher stage. The authors are explicit: progression is non-linear, and the surgical trigger is pain refractory to nonoperative care, not anticipated stage advancement.
The spring and deltoid ligaments are central to the pathomechanics. Always evaluate them. The PTT-centric model misses patients whose deformity is driven primarily by ligamentous insufficiency without any tendon rupture.