Here are some excellent resources for ankyloglossia. I am also attaching an article regarding why reflux is often an associated co-morbidity. These sites add to our understanding of posterior tongue tie, anterior tongue tie, as well as lip and cheek ties. Dr. Ghaheri has wonderful videos and pictures. I hope these resources inform your practice!
http://www.drghaheri.com/resources
Assessment Tool for Lingual Frenulum Function developed by Alison Hazelbaker
Steehler, M. W., Steehler, M. K., & Harley, E. H. (2012). A retrospective review of frenotomy in neonates and infants with feeding difficulties. Int J Pediatr Otorhinolaryngol. doi: 10.1016/j.ijporl.2012.05.00