INTRODUCTION Scleroderma, or systemic sclerosis, is a chronic connective tissue disease generally classified as one of the autoimmune rheumatic diseases. CASE PRESENTATION A 58-year-old woman was informed of her scleroderma, while receiving oral prosthetic rehabilitation. Mouth opening limitation had unfortunately led to treatment interruption. The psychological load of the disease itself, al...

We compare numerically computed resonances of the human vocal tract with formants that have been extracted from speech during vowel pronunciation. The geometry of the vocal tract has been obtained by MRI from a male subject, and the corresponding speech has been recorded simultaneously. The resonances are computed by solving the Helmholtz partial differential equation with the Finite Element Me...

A penetrating injury by a foreign body is comparatively common in the oral and maxillofacial region. On the other hand, injury to the temporomandibular joint (TMJ) by a foreign object is very rare. The TMJ is an anatomically narrow space surrounded by hard bony processes. An unusual case of trauma with severe trismus caused by a foreign body that impaled the TMJ is reported. A 55-year-old man p...

The purpose of this study was to investigate the influence of anteroposterior postural change on electromyography (EMG) activity in the lateral pterygoid muscle. Subjects consisted of 7 patients attending this hospital for close examination. The inferior heads of the lateral pterygoid and masseter muscles were chosen as evaluation sites. For the EMG recordings, the test movement was opening and...

Improving expressiveness in singing voice synthesis systems requires to perform realistic timbre transformations, e.g. for varying voice intensity. In order to sing louder, singers tend to open their mouth more widely, which changes the vocal tract’s shape and resonances. This study shows, by means of signal analysis and simulations, that the main effect of mouth opening is an increase of the 1...

Introduction:Temporomandibular disorders (TMDs) are referred to signs and symptoms involving masti‌catory muscles, temporomandibular joint and rele‌vant structures. Having been prevalent noticeably, we decided to evaluate the frequency of TMD, among patients referred to the dental clinic of Guilan university of medical sciences. Materials and Methods: In this cross-sectional study, a sample of ...