- Wallace (1963): "No frenulum should be divided before the age of four years, and thereafter only if the mechanism of tongue protrusion is too feeble to stretch or rupture it. Even after division, defective articulation will probably persist."
- Block (1968): "Surgery is not indicated if…there is a short frenulum, but tongue tip sounds are not affected, or if the tongue tip sounds are produced incorrectly but the individual can be stimulated to produce these sounds."
- Catlin & De Haan (1971): "…many writers in the last 25 years appear to agree that tongue-tie does not cause defects in speech. Contrary to public opinion, abnormalities of the tongue, in general, have comparatively slight effects on speech."
- Wright (1995): "Speech difficulties related to tongue tie are over-rated and mechanical problems [related to feeding] are underestimated."
- Agarwal and Raina (2003): "…there is enough evidence that good speech is still possible with significant tongue-tie and speech problems can be overcome without frenulotomy with speech therapy."
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