Introduction

The term "ankyloglossia" is from the Greek word meaning “tongue-tie”.¹ It is a congenital condition at birth where the tongue's range of mobility is limited.²

A tongue-tie occurs when the bottom of the tongue tip is attached to the floor of the mouth by an abnormally short, thick, or tight band of tissue called the lingual frenulum. So, the tongue's movement is restricted by the lingual frenulum

This limitation can affect various functions, including breastfeeding, speech, language development, and eating. Individuals with tongue-tie may also struggle to extend their tongue beyond the lips.²

Tongue-tie may not always be an issue. For certain situations, simple surgical treatment could be necessary.² Understanding tongue-tie is essential not only for healthcare professionals but also for parents and individuals affected by it to improve their quality of life.

Definition of tongue-tie

What is tongue-tie?

A tongue-tie happens when a fold of tissue that joins the bottom of a baby's tongue to the floor of their mouth hinders the tongue from moving normally. All kids have this tissue fold, known as the lingual frenulum, which is typically harmless. Yet, if this frenulum is too tight or short, it might block how well a baby's tongue can move or work. When this takes place, doctors call it ankyloglossia, which is more frequently referred to as tongue-tie.³

Sometimes, having a tongue-tie might make breastfeeding difficult. Babies that suffer tongue-tie may have problems sucking their milk or latching on. They might not be able to eat enough as a result. The breastfeeding parent may experience pain or discomfort as a result of latching issues and feel compelled to stop breastfeeding.³

What causes tongue-tie?

Tongue-tie is a congenital condition ( present at birth). Some researchers have assumed that tongue-tie is related to genetic factors, especially the X-linked gene. The disease is more common in males and is caused by a genetic mutation in the TBX22 gene.^1,3

Signs and symptoms of tongue-tie

Signs and symptoms include:^2,4

• Difficulty moving the tongue from side to side
• Tongue looks like heart-shaped or notched 
• During breastfeeding or bottle-feeding, the baby can lose their latch
• Clicking sounds can be made by the baby while feeding
• struggle to get a good nursing position

Classification of severity

According to the thickness and tightness of the fold of tissue (lingual frenulum ), the severity of tongue-tie can be classified into:

• Mild—that occurs when a small fold of tissue connects the tip of the tongue. The restrictions on the movement of the tongue are minimal
• Moderate—when there is a noticeable limitation in the function of the tongue
• Severe— occurs when the entire bottom of the tongue touches the floor of the mouth. Significant limitation that happens, which affects speech, feeding, and oral hygiene⁴

Prevalence of tongue-tie

The prevalence of tongue-tie ranges from 0.1% to 12%. As compared to 20 years ago, the prevalence of ankyloglossia diagnoses has increased, most likely as a result of worries about how it may affect breastfeeding.¹ In the UK, where there are more than 680,000 live births every year, almost 60,000 babies may have tongue-tie. Some of these mothers will have trouble breastfeeding and need medical assistance. However, the majority of newborns with tongue-tie (around 75%) show no symptoms and do not have feeding difficulties.⁵

Anatomy of the Tongue and Lingual Frenulum

What is the structure of the tongue?

Most of the tongue is made of muscle. Strong web-like tissue holds it tight in the mouth, and a moist layer, like what covers some parts and holes in the body, wraps it up. The tongue contains taste buds and is covered with numerous small bumps.. There are four types of these taste buds: filiform, fungiform, circumvallate, and foliate. The brain receives sensory information from taste buds, which are collections of nerve cells.

The tongue extends from the floor of the mouth back to the hyoid bone located in the middle of the neck. Often, the tongue is pink, but it can have a light or dark colour. If the colour looks off, it might mean there’s a health problem.³

The tongue has main functions that include:³

• The tongue plays the main role in digestion by helping in chewing and swallowing, and also has a role in moving the food inside the mouth. The tongue also enhances digestion by secretion of some enzymes
• Speech by making a variety of sounds and forming words
• Aid breathing by maintaining an open airway

What is a lingual frenulum, and its role?

The lingual frenulum is a small mucous membrane fold that is found on the tongue’s lower surface to connect the tongue to the oral cavity floor. Lingual frenulum is also referred to as the tongue’s frenulum.

This midline fold begins close to the root of the tongue and runs along the lingual midline sagittal septum anteriorly to the tip of the tongue. On its underside, the lingual frenulum is continuous with the mucous membrane lining the floor of the oral cavity.

During speaking, eating, and swallowing, the lingual frenulum has an important role in supporting and stabilising the tongue.⁶

Anatomical Variations in Tongue-tie

In the tongue-tie, the lingual frenulum may be attached at or near the tip of the tongue to the posterior or anterior aspect of the undersurface of the tongue but usually be short, thick and tight; this causes virtual adhesion of the tongue tip to the floor of the mouth and can result in restricted tongue tip movement.^7,8

The shape of the tongue in tongue-tie may be heart-shaped because the connection of the lingual frenulum is near the tip of the tongue and restricts the tongue’s movement. So, healthcare professionals perform physical examinations after birth and look for signs of tongue tie.³

Comparison of the anatomy of a normal tongue and a tongue-tie

Functional Implications of Tongue-tie

Neonatal feeding issues:

During breastfeeding, the baby needs to keep the tongue over the lower gum for sucking. Due to tongue-tie, the baby is not able to move his tongue, and rather than sucking, the baby might chew on the nipple. This can cause nipple pain and affect the baby’s ability to obtain breast milk, which may lead to insufficient feeding.²

So, lactation consultants can play an important role in adjusting breastfeeding positions and improving breastfeeding to overcome these problems.³

Oral health concerns:

Tongue-tie can lead to poor oral hygiene because it may hinder the tongue’s ability to effectively clear food debris from the teeth.

These remnants of food may cause dental caries and gum issues like gingivitis.

Interfere with speech and language development:

Tongue-tie can interfere with the ability to make certain sounds,such as “t,” “d,” “z,” “s,” “th,” “n,” and “l.”

Interfere with other oral activities:

Activities like kissing, licking an ice cream cone, and playing a wind instrument might be hindered by tongue-tie.²

Summary 

Tongue-tie (ankyloglossia) is a condition where the thin line under the tongue is too tight, thick, and short. This can interfere with essential functions like eating, talking, and mouth care. Early diagnosis and effective treatments depend on an understanding of the tongue's anatomy and the difference between normal and restricted movement.

By seeing how a normal tongue works next to one with tongue-tie, healthcare professionals and those who give care can face the problems tied to this state. Finding this early and starting help or surgery can make life better and stop worse issues later. We must spread the word about tongue-tie to help and care for those who have it on time.