What is Interdental Lisp and Its Treatment

What is Interdental Lisp and Its Treatment

Speaking clearly and with confidence plays a vital role in successful communication. For some, however, producing certain sounds can be challenging due to a speech pattern known as an interdental lisp. At SLT London, we specialise in identifying and treating various types of lisps, helping adults and children alike achieve clearer, more natural speech.

What is Interdental Lisp

An interdental lisp occurs when the tongue pushes forward between the front teeth while speaking, particularly during the production of “s” and “z” sounds. Instead of a crisp “s,” the result often sounds more like a “th.” For example, “sun” might be pronounced as “thun.” This pattern is sometimes referred to as interdental lisping or a frontal lisp.

Types of Lisps

Lisps are not all the same. Understanding the main types can help you recognise the specific challenges you or your loved one may face:

• Interdental (Frontal) Lisp: The tongue protrudes between the teeth, causing “s” and “z” to sound like “th.”
• Dentalised Lisp: The tongue pushes against the front teeth, creating a muffled sound.
• Lateral Lisp: This occurs when air flows out from the sides of the tongue, creating a sound that may seem “wet” or “slushy.”
• Palatal Lisp: Happens when the tongue makes contact with the hard palate during the production of “s” and “z” sounds.
• Developmental/Functional Lisps: Often found in young children, or may develop due to certain habits or emotional stress.

Interdental Lisp Causes

The exact interdental lisp causes can vary, but several factors are commonly involved:

• Anatomical Differences: Conditions like tongue tie, cleft palate, or dental misalignment can affect tongue placement.
• Prolonged Habits: Thumb sucking, pacifier use, or extended bottle feeding can push teeth forward and encourage tongue thrusting.
• Hearing Issues: Difficulty hearing certain sounds can impact accurate speech development.
• Cognitive or Developmental Factors: Some children with developmental delays may be more prone to lisping.
• Mouth Breathing or Allergies: Chronic mouth breathing or nasal congestion can influence tongue position.

In many cases, an interdental lisp is simply a part of early speech development and may resolve naturally by age 4-5. However, if it persists beyond age 7 or into adulthood, professional intervention is recommended.

How is an Interdental Lisp Diagnosed?

Diagnosis of interdental lisping is typically made by a speech and language therapist. The assessment process may include:

• Speech Sound Evaluation: Analysing which sounds are affected and how they are produced.
• Oromotor Assessment: Checking tongue movement, strength, and coordination.
• Hearing Screening: Ensuring hearing loss is not contributing to the issue.
• Observation and History: Reviewing habits, dental history, and developmental milestones.

At SLT London, our experienced therapists use evidence-based methods and a holistic approach to ensure a thorough and accurate diagnosis.

Interdental Lisp Treatment at SLT London

Interdental lisp treatment is highly effective, especially with early intervention. At SLT London, our therapy is tailored to each individual’s needs and may include:

1. Articulation Therapy

• Auditory Discrimination: Helping clients hear the difference between correct and incorrect sounds.
• Visual and Tactile Cues: Using mirrors, models, and hands-on techniques to teach correct tongue placement.
• Sound Practice: Starting with isolated sounds, then progressing to syllables, words, and sentences.
• Generalisation: Generalisation involves using improved speech techniques naturally during everyday interactions and conversations.

2. Habit Modification

Addressing thumb sucking, pacifier use, or other habits that may contribute to tongue thrusting.

3. Orofacial Myofunctional Therapy

Exercises to strengthen tongue and mouth muscles, supporting proper speech and swallowing.

4. Collaboration with Other Professionals

In cases involving dental or anatomical issues, we may work alongside dentists or orthodontists for comprehensive care.

5. Support and Education

• Providing strategies and resources for practice at home, and guidance for parents or caregivers.

Why Early Treatment Matters

If left untreated, an interdental lisp can impact:

• Speech Clarity: Reduced speech clarity can make it challenging for others to understand what you're saying.
• Academic Success: Affecting reading and spelling development.
• Social Confidence: Leading to frustration or embarrassment in social situations.
• Self-Esteem: Persistent speech difficulties can lower confidence, especially in children3.

Early intervention with a qualified speech and language therapist can prevent these challenges and promote lifelong communication skills.

Why Choose SLT London for Lisp Treatment?

At SLT London, we are committed to providing the highest quality care for speech and language challenges:

• Expertise: Led by Dr. Shereen Matar, our team has years of experience with adult and paediatric speech disorders.
• Personalised Approach: Every treatment plan is tailored to your unique needs and goals.
• Evidence-Based Practice: We use proven, up-to-date therapy methods for the best outcomes.
• Holistic Care: We consider emotional and social factors, not just speech symptoms.
• Flexible Options: Choose from private or online sessions to fit your schedule and lifestyle.
• Supportive Environment: We create a welcoming, encouraging space for therapy and growth.

Interdental Lisp FAQs

What age should I seek help for an interdental lisp?
If a lisp persists beyond age 7, or if it causes concern at any age, professional assessment is recommended.

Can adults benefit from interdental lisp treatment?
Absolutely. While early intervention is ideal, adults can make significant progress with targeted therapy.

How long does treatment take?
The duration varies by individual, but regular practice and commitment often lead to noticeable improvements within a few months.

Is online therapy effective for lisp treatment?
Yes! SLT London offers effective online sessions, making therapy accessible and convenient.

Take the Next Step with SLT London

If you or your child is struggling with an interdental lisp, don’t wait to seek support. With the right guidance and practice, clear and confident speech is within reach. Contact SLT London today to schedule a consultation and begin your journey toward better communication.