Can Orthodontic Treatment Improve Speech and Chewing?

Have you ever noticed that certain words are difficult to pronounce because your teeth don’t line up properly? Or maybe chewing feels uneven or uncomfortable, or requires more effort than it should. While many people think orthodontic treatment is only about creating a straighter smile, properly aligning the teeth and jaws can also improve important everyday functions like speaking and eating.

Your teeth, tongue, lips, and jaw work together every time you speak or chew. When teeth are crowded, spaced too far apart, or affected by an overbite, underbite, crossbite, or open bite, these movements may become less efficient. Correcting bite problems can improve how your teeth come together, allowing better chewing mechanics and, in some patients, clearer speech.

Research also shows that orthodontic appliances may temporarily affect speech while patients adapt. A systematic review that evaluated 7 studies involving 332 patients found that clear aligners commonly caused temporary articulation changes—particularly with sounds such as /s/, /z/, /sh/, and /th/—but most patients adapted within 7–14 days, with a smaller number taking up to 30–60 days.

The encouraging news is that while braces or aligners may briefly change speech during treatment, correcting underlying bite problems can improve oral function over the long term for appropriately selected patients. Understanding this relationship can help you make informed decisions about orthodontic care.

Why Bite Alignment Matters

Speaking and chewing depend on precise coordination between the following:

• Teeth
• Tongue
• Lips
• Jaw muscles
• Temporomandibular joints (TMJs)

When teeth fit together correctly, these structures work efficiently.

Poor bite alignment may contribute to:

• Difficulty biting certain foods
• Uneven chewing
• Excessive tooth wear
• Jaw fatigue
• Difficulty pronouncing certain sounds

How Teeth Affect Speech

Many speech sounds require precise contact between the tongue, teeth, and lips.

Examples include:

• S
• Z
• TH
• F
• V
• SH
• CH

If teeth are significantly misaligned, tongue placement may become more difficult, which can influence articulation in some individuals.

It’s important to note that not every speech problem is caused by orthodontic issues, and some speech disorders require evaluation by a speech-language pathologist. Orthodontic treatment is recommended only when the bite or tooth position contributes to functional problems.

Bite Problems That May Affect Speech and Chewing

Overbite

An excessive overlap of the upper front teeth may interfere with tongue positioning during speech and make biting into foods less efficient.

Underbite

An underbite changes the relationship between the upper and lower front teeth, which may affect the pronunciation of certain consonants and alter chewing patterns.

Open Bite

When the front teeth do not meet, it may become difficult to:

• Bite sandwiches
• Bite apples
• Pronounce certain speech sounds that rely on proper tongue-to-tooth contact.

Crossbite

Crossbites may create uneven chewing forces and contribute to asymmetric jaw movement.

Crowded Teeth

Crowding can interfere with tongue space, trap plaque, and sometimes affect speech clarity, depending on its severity.

Can Orthodontic Treatment Improve Chewing?

For many patients, yes.

Proper tooth alignment allows biting forces to be distributed more evenly across the teeth.

Potential functional benefits include:

• More Efficient Biting: Front teeth can cut food more effectively.
• Better Grinding: Back teeth contact more evenly, breaking food into smaller pieces.
• Reduced Jaw Fatigue: Balanced chewing places less strain on the jaw muscles.
• Improved Comfort: Patients with corrected bite relationships often experience improved chewing efficiency after treatment.

Orthodontic Treatment and Speech

One common concern is whether braces or aligners permanently affect speech.

Current evidence suggests they may temporarily change speech, but most patients adapt quickly.

A systematic review of 13 clinical studies (297 patients) found that fixed appliances, retainers, and palatal expanders can temporarily affect speech clarity, especially sounds such as /s/, /z/, /l/, /t/, /d/, and /r/. Most speech changes improved within weeks, although certain sounds occasionally took longer to normalize.

Similarly, studies of clear aligners report temporary lisping or changes in articulation early in treatment, with most patients adapting within 1 to 2 weeks.

Who Benefits Most from Orthodontic Treatment?

Orthodontic treatment may improve oral function for patients with:

• Moderate to severe crowding
• Significant overbite
• Underbite
• Crossbite
• Open bite
• Poor chewing efficiency
• Bite-related tooth wear

An orthodontic evaluation helps determine whether tooth or jaw alignment is contributing to these concerns.

Orthodontic Treatment Options That Support Better Function

Modern orthodontics offers several treatment options designed to improve both bite alignment and oral function. Your local Darien orthodontist will recommend the most appropriate solution based on your age, bite, and treatment goals.

Traditional Braces

Braces remain one of the most effective treatments for correcting moderate-to-severe bite problems.

They can improve:

• Crowded teeth
• Spacing
• Overbites
• Underbites
• Crossbites
• Open bites

As teeth gradually move into healthier positions, many patients experience improved chewing efficiency and a more balanced bite.

Clear Aligners

Clear aligners provide a discreet alternative for many teens and adults with mild to moderate orthodontic concerns.

Research indicates that aligners may temporarily affect speech—particularly sounds such as /s/, /z/, /sh/, and /th/—but most patients adapt within 7–14 days, with speech returning to normal as they become accustomed to the appliance.

Palatal Expanders

For some children, a narrow upper jaw can contribute to bite problems that affect chewing and speech.

A palatal expander gradually widens the upper jaw, creating additional space for proper tooth eruption and improving the relationship between the upper and lower teeth.

Can Orthodontic Treatment Improve Speech?

The answer depends on why speech is affected.

If speech difficulties are primarily related to tooth position or bite alignment, orthodontic treatment may help improve articulation over time by creating a more favorable relationship between the teeth, tongue, and lips.

However, not all speech disorders are caused by orthodontic issues.

Conditions involving:

• Neurological disorders
• Hearing loss
• Developmental speech disorders
• Muscle coordination problems

Often require evaluation and treatment by a speech-language pathologist (SLP) in addition to any dental or orthodontic care.

A systematic review of 13 clinical studies involving 297 patients found that orthodontic appliances can temporarily influence speech clarity during treatment, but most speech disturbances improve within weeks as patients adapt.

Benefits for Children, Teens, and Adults

Children

Early orthodontic evaluation can identify developing bite problems before they become more severe.

The American Association of Orthodontists (AAO) recommends that children receive an orthodontic evaluation by age 7, allowing clinicians to monitor jaw growth and intervene when appropriate.

Potential benefits include:

• Improved bite development
• Better chewing function
• Easier oral hygiene
• Guidance for erupting permanent teeth

Teenagers

Adolescence is often an ideal time for comprehensive orthodontic treatment because the jaws are still developing.

Treatment during these years may improve:

• Bite function
• Smile aesthetics
• Oral hygiene
• Self-confidence

Adults

Orthodontic treatment is increasingly common among adults.

Adults may benefit from treatment that:

• Improves chewing efficiency
• Reduces uneven tooth wear
• Makes teeth easier to clean
• Enhances the appearance of a smile
• Supports long-term oral health

Additional Long-Term Oral Health Benefits

Improving bite alignment offers advantages beyond speech and chewing.

These include:

• More Even Distribution of Bite Forces: Balanced biting forces reduce excessive pressure on individual teeth.
• Easier Oral Hygiene: Straighter teeth are generally easier to brush and floss, helping reduce plaque buildup.
• Reduced Tooth Wear: Correcting certain bite discrepancies may decrease abnormal enamel wear over time.
• Healthier Gums: Better alignment can make plaque removal more effective, supporting healthier gum tissue.
• Improved Comfort: Some patients experience less muscle fatigue during chewing after bite correction.

How to Support Speech During Orthodontic Treatment

If braces or aligners temporarily affect your speech, these strategies may help you adapt more quickly:

• Read aloud for 10–15 minutes each day.
• Practice words containing S, SH, TH, and CH sounds.
• Stay hydrated to reduce oral dryness.
• Wear aligners as instructed to promote consistent adaptation.
• Be patient—most temporary speech changes improve within days or weeks.

Conclusion

Orthodontic treatment does far more than straighten teeth. Improving bite alignment can enhance chewing efficiency, distribute biting forces more evenly, and, in some cases, improve speech when tooth position contributes to articulation difficulties. Although braces, aligners, and other appliances may temporarily affect speech during the adjustment period, research shows that most patients adapt quickly and regain normal speech patterns within weeks.

If you or your child experiences difficulty chewing, concerns about bite alignment, or speech issues that may be related to the position of the teeth or jaws, a comprehensive orthodontic evaluation can help determine the most appropriate treatment plan. Early diagnosis and personalized care can improve both oral function and long-term dental health.

Frequently Asked Questions