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Chewing efficiency in children with motor speech disorders.

H Björelius1,2, G Tsilingaridis3,4, F Johansson5,6

  • 1Karolinska Institutet, Department of Clinical Sciences, Danderyd Hospital, Stockholm, Sweden. helena.bjorelius@ki.se.

European Archives of Paediatric Dentistry : Official Journal of the European Academy of Paediatric Dentistry
|August 20, 2025
PubMed
Summary

Children with speech sound disorders (SSD), particularly those with motor speech disorders (MSD), exhibit reduced chewing efficiency compared to typically developing peers. Oral motor delays are common in SSD.

Keywords:
Chewing efficiencyMotor speech disordersQuality of lifeSpeech sound disorders

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Area of Science:

  • Speech-language pathology
  • Pediatric audiology
  • Developmental pediatrics

Background:

  • Speech sound disorders (SSD) encompass a range of difficulties in producing sounds.
  • Motor speech disorders (MSD) are a subset of SSD characterized by difficulties in motor planning and execution of speech.
  • Chewing efficiency is a complex motor task that may be affected by underlying oral motor skills.

Purpose of the Study:

  • To investigate and compare chewing efficiency in children with SSD, with a specific focus on those with MSD.
  • To determine if children with MSD exhibit differences in chewing efficiency compared to typically developing (TD) children.

Main Methods:

  • A clinical sample of 101 children with SSD (78 with MSD), aged 4-9 years, and 76 TD children participated.
  • Chewing efficiency was assessed using the two-colour Hue-Check© chewing gum test.
  • Computer-based image analysis measured colour mixing after 20 chewing cycles (SDHue outcome).

Main Results:

  • Children with SSD demonstrated significantly lower chewing efficiency than TD children.
  • Children with MSD and concomitant diagnoses (language, oral motor delay) aged 7-9 years showed markedly reduced chewing efficiency compared to age-matched TD peers (p < 0.001).
  • Oral motor developmental delay (ODD) was prevalent in the SSD group.

Conclusions:

  • Children with MSD exhibit impaired chewing efficiency, suggesting a potential link to broader oral motor challenges.
  • The findings highlight the importance of assessing oral motor skills in children with SSD.
  • Further research is needed to understand the interrelations of symptoms and inform targeted interventions for SSD and MSD.