Prevalence of symptoms of functional disturbances of the masticatory system in Swedish men

Abstract

Subjective and clinical symptoms of mandibular dysfunction and cuspal interferences were studied in 389 Swedish men (median age 32 years). Impaired chewing function was noted in about 10%, different types of parafunction in 26%, frequent headaches in 5%, TMJ or muscle pain in 3% and difficulties in mouth opening in 10% of the men. Locking or luxation of the mandible was the most prevalent clinical symptom (24%), followed by reduced movement capacity and deviation on opening of the mandible, TMJ-sounds and muscle tenderness. Sixty per cent of the men had one or more clinical symptoms of dysfunction. Subjective symptoms of dysfunction were positively correlated with reduced movement capacity of the mandible and tenderness of the masticatory muscles and temporomandibular joints upon palpation. Positive correlations were found between subjective symptoms of dysfunction and non-working side interference as well as single tooth contact on the working side. Locking or luxation of the mandible and TMJ-sounds were positively correlated with single tooth contact on the working side and TMJ-sounds and muscle tenderness with interferences in the retruded position of the mandible.

The relationship of occlusion, parafunctional habits and recent life events to mandibular dysfunction in a non‐patient population

“…Molin et al (1976) studied a general population of men {n = 253) and found that none of the individual oeelusal variables pooled to form the variable oeelusal disturbances, differed signifieantly in frequeney between the groups with and without clinical dysfunction. Ingervall et al (1980) found that grouping of interferences did not reveal any closer correlation with symptoms than the individual types of interferences. Finally, Helkimo (1974a, b) created an oeelusal index to pool functional and structural aspects of occlusion and compared them to mandibular dysfunction.…”

Relationship between occlusal factors and signs and symptoms of mandibular dysfunction: A clinical study of 48 dental students

“…The explanatory value of occlusal interferences for the variation of dysfunction in these studies was small, however (24,25,(29)(30)(31). The inconsistent results of previous studies related to the influence of occlusal factors on function and dysfunction of the masticatory system have been reviewed earlier (32)(33)(34).…”

Signs and symptoms of mandibular dysfunction after introduction of experimental balancing-side interferences

“…Nevertheless, in their study six out of eight subjects with a clinical dysfunction score had a reduced score after occlusal adjustment. Epidemiological studies have also demonstrated correlations between signs and symptoms of mandibular dysfunction and balancing-side interferences (11,12) and interferences in RP (13).…”