objectives: the purpose of this study was to determine the frequency of all odontogenic cysts (ocs) along with age range, gender distribution, and the site of involvement over a 10-year period (march 2001 to march 2011) and to compare these data with findings from other surveys. methods: the archives of departments of oral and maxillofacial pathology from shahid beheshti and tehran university o...

This study evaluated the effectiveness of interferential current stimulation (ICS) to decrease recurrent jaw pain and to increase maximum vertical jaw opening. Forty subjects with either a history of recurrent jaw pain of three months' duration or of constant, chronic jaw pain that recurred within the preceding two months participated in the study. Twenty subjects received three 20-minute treat...

The function of the jaw for feeding and speech has long been the discussion of both speechlanguage pathologists and occupational therapists. This article will examine the relationship between jaw movements or jaw skill levels for feeding quality and speech clarity. What has been missing in our discussions concerning jaw function is the role the jaw plays in the development of speech sounds. Inf...

Experiments were performed on human elbow flexor and extensor muscles and jaw-opening and -closing muscles to observe the effect on rhythmic movements of sudden loading. The load was provided by an electromagnetic device, which simulated the appearance of a smoothly increasing spring-like load. The responses to this loading were compared in jaw and elbow movements and between expected and unexp...

Tremulous jaw movements are rapid vertical deflections of the lower jaw that resemble chewing but are not directed at any particular stimulus. In rats, tremulous jaw movements can be induced by a number of conditions that parallel those seen in human parkinsonism, including dopamine depletion, dopamine antagonism, and cholinomimetic drugs. Moreover, tremulous jaw movements in rats can be attenu...

The regulation by muscle spindles of jaw-closing muscle activity during mastication was evaluated in anesthetized rabbits. Simultaneous records were made of the discharges of muscle spindle units in the mesencephalic trigeminal nucleus, masseter and digastric muscle activity (electromyogram [EMG]), and jaw-movement parameters during cortically induced rhythmic jaw movements. One of three test s...

Fabrication of interocclusal splint at a thickness determined by the vertical dimension at which the jaw muscle EMG amplitude is minimum has been recommended. However, the effect of prior jaw motion and the effect of the recording site on the EMG amplitudes and on the vertical dimension of minimum EMG activity have not been documented. IEMG amplitudes at various static jaw positions achieved du...

Exposure to environmental contaminants can disrupt normal development of the early vertebrate skeleton. 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) impairs craniofacial skeletal development across many vertebrate species, and its effects are especially prominent in early life stages of fish. TCDD activates the aryl hydrocarbon receptor, a transcription factor that mediates most if not all TCDD r...

introduction: peripheral odontogenic tumors are rare and there is no valid information of the frequency of them in the literature. this study aims to obtain the frequency of these tumors. materials and methods: the files of oral and maxillofacial pathology (microscopic reports and slides), faculty of dentistry, shahid beheshti university of medical sciences served as the source of the material ...

Dlx transcription factors are implicated in patterning the mammalian jaw, based on their nested expression patterns in the first branchial arch (primordium for jaw) and mutant phenotypes; inactivation of Dlx1 and Dlx2 (Dlx1/2-/-) causes defects in the upper jaw, whereas Dlx5/6(-/-) results in homeotic transformation of the lower jaw into upper jaw. Therefore, the 'Dlx codes' appear to regionali...