The effect of frenotomy in infants with ankyloglossia on maternal nipple pain - a systematic review.

Introduction: Ankyloglossia in breastfeeding infants has been proposed to cause maternal nipple pain. Lingual frenotomy has been cited to reduce maternal nipple pain. The aim of this systematic review was to investigate if frenotomy in infants with ankyloglossia and breastfeeding problems reduces maternal nipple pain.

Methods: We conducted a systematic literature search for RCTs comparing frenotomy to a sham procedure or usual care in mother-infant dyads with ankyloglossia and maternal nipple pain. Maternal nipple pain was registered as the main outcome. We conducted a meta-analysis and assessed the risk of bias using Rob 2.0 and the quality of evidence, adopting the GRADE approach.

Results: Five RCTs were included in the review. Three RCTs were used for the meta-analysis. The meta-analysis showed a significant pre-post intervention reduction in maternal nipple pain in the frenotomy group compared with the comparison group: mean difference = -1.23; 95% confidence interval: -1.88 to -0.57. The overall bias was assessed to range from "some concerns" to "high". The quality of evidence for the assessed outcome, maternal nipple pain, was classified as "low" to "very low".

Conclusions: We found that frenotomy reduced maternal nipple pain in the short term. Despite being statistically significant, the clinical relevance of a 1.2-point reduction on a ten-point VAS must be questioned. Due to a considerable risk of bias along with a low study quality, the definitive benefit of frenotomy on maternal nipple pain remains unproven. Hence, quality large-scale RCTs are warranted.