Subjects with temporomandibular joint disc displacement and body posture assessment via rasterstereography: a pilot case-control study

C. Di Paolo, P. Papi, G. Falisi, G. Pompa, V. Santilli, A. Polimeni, A. Fiorini

Department of Oral and Maxillo-Facial Sciences, “Sapienza” University of Rome, Rome, Italy. piero.papi@uniroma1.it

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• Maxillofacial Surgery

OBJECTIVE: The possible relationship between temporomandibular disorders (TMDs) and body posture is still controversial. Rasterstereography has been introduced as a radiation-free, reliable and non-invasive method to analyze three-dimensional spinal posture. The aim of this case-control study is to evaluate, through rasterstereography, body posture parameters in a group of patients with reducible unilateral dislocation of the articular disc, compared to healthy volunteers.

PATIENTS AND METHODS: Rasterstereographic recordings obtained were compared between the two groups with a paired t-student test. Furthermore, the relationship between Rasterstereographic recordings and clinical data in the TMD group were analyzed by means of multiple regression analysis.

RESULTS: Only lateral deviation was statistically significant different between the two groups (rms VPDM Control group 40% > TMD group, p=0.02; 43% control group VPDM max > TMD group, p<0.02). In the TMD group, a significant relationship (p<0.05) was found out between lateral and rotational deviations of the column and muscular pain, therefore suggesting a possible overactivity of the masticatory muscles, especially of lateral pterygoids’ bilaterally and the left masseter.

CONCLUSIONS: Patients with reducible unilateral disc displacement showed limited postural alterations compared to healthy volunteers, only lateral deviations (VPDM rms and VPDM-max) were statistically significant (Π<0.05) between the two groups.

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