“…There are different kinds of PSIO treatment approaches with different mechanics, all seeking and achieving different objectives (Friede et al, 1998;Kuijpers-Jagtman et al, 2000;Prahl-Andersen, 2000;Ross et al, 2000;Watson et al, 2004;Berkowitz, 2006). Among these, presurgical nasoalveolar molding (PNAM) appliances have generated considerable interest in recent years and have been in use as a new approach to traditional presurgical infant orthopedics (TPSIO) Maull et al, 1999;Grayson et al, 2001;Suri and Tompson, 2004;Singh et al, 2005).…”