Happy New Year from Dr Rich Blake!!
Podiatrists, and many physical therapists, make orthotic devices and other biomechanical decisions based on balancing the patient's forefoot abnormalities. When the primary function of the orthotic device is to support structural problems in the foot, the orthotic devices is called a balanced orthotic device or Root balanced orthotic device. Dr Mert Root, the founder of modern day orthotic devices, first published and lectured extensively on this subject in the 1960s and 1970s. It is still to many health care providers the only way to treat patients. The next few weeks I will be discussing the biomechanical guidelines surrounding this type of approach.
It was the 1980s that the next explosion in biomechanics occurred with the development of Corrective orthotic devices with Biaxial sectioning, Inverted technique (my invention), Kirby Skive, and other modifications. Here the foot was modified to correct the forces of pronation more than could be accomplished by Root balancing or modified Root balancing. Here will be many posts on these sections.
Now see the mold below. The lateral arch is filled in. This is more like an OTC orthotic device now and loses its effectiveness for many injuries.