The relatively recent introduction of corticotomies and piezocision has made it possible
for orthodontists to accelerate tooth movement and thereby to shorten the length of
orthodontic treatment. Specialists emphasizing a mechanistic concept have been debating
the underlying basic biological mechanics of these new therapeutic tools with opposing
specialists who support a biological conception. Our analysis of different publications on
the subject suggests that the biological explanation, with its emphasis on the Regional
Acceleratory Phenomenon (RAP), is correct. However, the majority of studies in this field
are not based on the principle of evidence based medicine (EBM).