Mulligan Mechanics Part VII Mulligan Protrusion Arch
By Dr. Adrian J. Palencar, MUDr, MAGD, IBO, FADI, FPFA, FICD
January 2025
IAO Diplomate
68 – Tremont Drive, ST. Catharines
ON L2T 3B2, Canada
Do not memorize, understand – Dr. T. Mulligan
The Mulligan Protrusion Arch is indicated for protrusion of retroclined incisors (i.e., Class II, division 2), and is very easy to fabricate 5.0 – 6.0 mm tall Vertical open loop abutting the first molars with Loop forming pliers (or Long bird beak) pliers. The Mulligan Protrusion Arch may be passive, intrusive, or extrusive, depends on if you activate it with a tip-back or tip forward.
The protrusion is done by opening the loop 1.0 mm every month, until the desired result is achieved. It is paramount to bend-back the end of the arch wire.
References:
- Mulligan T.F., Common Sense Mechanics in Everyday Orthodontics, (158)
- Palencar A. J., Case finishing and Mechanics, (29)