ArticleJournal of oral & facial pain and headache2025
Anatomical versus functional classification of ankyloglossia and their association with temporomandibular joint disorders in adults: a cross sectional study.
Article in Journal of oral & facial pain and headache, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundRestrictive lingual frenula, commonly referred to as ankyloglossia, are well documented in pediatric literature, with established impacts on breastfeeding, swallowing, reflux, speech, maxillary development, breathing, and sleep in children. However, data on its effects in adolescents and adults remains limited. This study aimed to investigate the correlation between restrictive lingual frenula and the development of temporomandibular disorders (TMD) in an adult population.
methodsA total of 129 patients (aged 18-80 years; 41 males and 88 females) were assessed for TMD signs and symptoms using the three Lövgren screening questions, supplemented by a clinical examination following the German Association for Craniomandibular Function and Diagnostics (DGFDT) screening protocol. The presence and severity of ankyloglossia were evaluated using the Tongue Range of Motion Ratio (TRMR 2019) and Kotlow's free tongue classification. Association between variables were analyzed using Chi-square tests.
resultsTMD was identified in 49.1% of the cohort, while ankyloglossia was observed in 46.7% based on the TRMR. No significant association was found between TMD and either anterior (39.6%) or posterior (34.9%) tongue restriction using the TRMR criteria. However, when categorized according to Kotlow's classification, mild to severe ankyloglossia (59.2%) showed a statistically significant association with TMD (
conclusionsA weak but significant correlation was observed between TMD and the degree of ankyloglossia, particularly when assessed using Kotlow's method. Further studies with larger sample sizes, stratified by age and sex, incorporating occlusal factors, and employing a standardized validated assessment tool adapted for adults, accounting for both anatomical and functional criteria are warranted to explore potential causal relationships.
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