Lip Tie

Relationship between tip nasal muscles and the short upper lip. de Souza Pinto EB. Aesthetic Plast Surg. 2003.
Diagnosing and understanding the maxillary lip-tie (superior labial, the maxillary labial frenum) as it relates to breastfeeding. Kotlow LA. J Hum Lact. 2013

Other Research articles

Hypotonic (weak) Masseters

High and Narrow Palate

Habits

Forward Head Posture