Occlusion has been an important consideration in orthodontics since the beginning of the discipline. Early emphasis was placed on the alignment of the teeth, the stability of the intercuspal position, and the esthetic value of proper tooth positioning. These factors remain important to orthodontists, but orthopedic principles associated with masticatory functions must also be considered. Orthop...

About 30% of individuals in the Swedish population will at some stage during life have treatment with orthodontic appliances. In more severe cases, when orthodontic treatment is not considered sufficient enough to correct the malocclusion, the orthodontic treatment is combined with orthognathic surgery. For these cases, a satisfying jaw relation is achieved by surgically moving the maxilla and/...

The aim of this study was to evaluate whether patients with hyposalivation present damaged mastication or mandibular movements during speech. Forty subjects composed 2 groups: control and hyposalivation. Masticatory performance was assessed with a silicon-based artificial material and a 10-sieve method. Mandibular movements during speech were observed with a 3D jaw-tracking device. Data were an...

The aim of this study was to develop and validate under laboratory conditions an algorithm for a time-frequency analysis of rhythmic masticatory muscle activity (RMMA). The algorithm baseband demodulated the electromyographic (EMG) signal to provide a frequency versus time representation. Using appropriate thresholds for frequency and power parameters, it was possible to automatically assess th...

BACKGROUND Myositis Ossificans is a rare heterotopic bone formation within a muscle being the masticatory muscles exceptionally involved. In most cases there is a previous trauma, bearing in mind that there may be many other etiologies. CT scan and panoramic radiographs along with histological findings are essential diagnostic aids. CASE DESCIPTION We report a rare case of MO of masseter musc...

A three-year-old, unspayed mongrel was presented to Small Animal Medicine unit, TVCC, River with a history of inability to open the mouth, not taking feed or water, drooling of saliva, and dullness for the past 5 days. Upon clinical observation and laboratory examination the condition was diagnosed as chronic Masticatory Muscle Myositis (MMM) and was treated with immunosuppressive doses ofcorti...

Functional forces are transmitted to the basal seat mucosa through a hard denture base during mastication. Such hard base dentures are not comfortably tolerated in patients with fragile oral mucosa and will cause sore spots, masticatory pain, and further resorption of alveolar bone. Soft liners materials can be advocated successfully to manage such clinical situations. The soft liner material a...

A number of studies have linked temporomandibular disorders (TMD) to altered activation patterns of the masticatory muscles during occlusion (Ciancaglini et al., 2002). Treatment of TMD aimed at restoring neuromuscular function requires knowledge of how occlusal contact is achieved in the healthy population. The purpose of this study was to identify common masticatory muscle function patterns i...

Basic patterns of masticatory rhythm are generated by the intrinsic neuronal network, so called masticatory central pattern generator, in the brain stem, and are fine tuned in response to both peripheral feedback and central afferent inputs. It is well known that peripheral receptors responsible for the regulation of masticatory rhythm are distributed in the periodontium, lips, oral mucosa, jaw...