1. 1. Proffit WR, Fields HW Jr, Moray LJ. Prevalence of malocclusion and orthodontic treatment need in the United States: estimates from the NHANES III survey. Int J Adult Orthodon Orthognath Surg. 1998;13(2):97-106. [CrossRef]
2. 2. Bishara SE, Ziaja RR. Functional appliances: a review. Am J Orthod Dentofacial Orthop. 1989;95(3):250-258. [CrossRef]
3. 3. Clark W. Twin-Block Functional Therapy. 1995.
4. 4. McNamara JA, Brudon WL, Kokich VG. Orthodontics and dentofacial orthopedics. Needham Press; 2001. [CrossRef]
5. 5. Vogt W. The Forsus fatigue resistant device. J Clin Orthod. 2006;40(6):368-358. [CrossRef]