A Retrospective Cohort Study of the Impact of Upper Lip Tie Release on Breastfeeding in Infants.

Objectives: Lingual frenotomies for the purpose of improving infant breastfeeding remain controversial, whereas maxillary frenotomies are even more so given the scant data and differing opinions on the matter. This study aimed at further elucidating the effect that maxillary frenula have on breastfeeding difficulties in infants. Methods: A retrospective chart review was performed on infants approximately aged 0-3 months who presented to a tongue tie/breastfeeding clinic from January to December of 2019. All analyzed infants had both lip and tongue ties classified by a clinician. Data on pre-frenotomy pain scores, lingual Coryllos classification, maxillary Kotlow classification, post-frenotomy complications, and breastfeeding success were captured. Results: Of the 316 infants, 224 underwent their first procedure at the tongue tie/breastfeeding clinic. Two hundred eleven out of 224 infants received a lingual frenotomy only, whereas the remaining 13 (5.8%) underwent both lingual and maxillary frenotomy procedures. Of the group of 211, 207 (98.1%) had successful feeding after 1 procedure; the remaining 4 underwent revision procedures to achieve successful feeding. All maxillary frenulum releases ( n  = 13) led to successful feeding without the need for revision procedures. Coryllos and Kotlow classification scores were significantly higher in the infants receiving both a maxillary and lingual frenulum release as compared with those receiving solely a lingual frenulum release. Conclusions: The majority (98.1%) of infants receiving a lingual frenulum release alone had successful feeding after only one procedure, and only 5.8% of all infants receiving any intervention required a maxillary frenulum release for successful feeding, calling into question the relative necessity of performing maxillary frenulum releases for breastfeeding difficulties.