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Results for “Maxillofacial Development”

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At least 91 records · Page 5Linked to original sources
PubMed1995

Habits affecting dental and maxillofacial growth and development.

In concluding this discussion, it is apparent that altered oral function or rest position may have a significant influence on the developing orofacial region. In the case of non-nutritive sucking habits, the child's commitment and desire to stop the habit is important to the successful elimination of the habit. At times, a hands-off approach is our best approach. Other habits are managed by addressing their cause. We, as dentists, have the ability to influence this process through the proper identification and management of these problems.

Behavior Therapy↗
PubMed2003

Development of dento-maxillofacial cone beam X-ray computed tomography system.

We have developed a cone beam X-ray computed tomography (CT) system to make more accurate three-dimensional (3-D) images for diagnosis of dento-maxillofacial region. The developed system has sufficient spatial resolution, resolution of 3-D images and image distortion for diagnosis of dentomaxillofacial region.

Humans↗
PubMed1997

The influence of the masticatory hypofunction on the craniofacial growth and development in rats.

In the present study, one masticatory hypofunction group and one normal function group were comprised of growing Wistar albino rats. The influence of the masticatory hypofunction on the growth and development of the craniofacial skeleton in rats was examined. The normal function group received the diet in the form of hard pellets, but the hypofunction group was fed powdered food. To avoid growth reduction because of nutritional deficiency, the animals were fed ad libitum, diet and water. At the end of the experimental period, the 90-day-old adult animals were killed and the direct anthropometric cranial, maxillary, and mandibular measurements were made on the skulls. The significant results can be summarized as follows: Total skull length, total anterior face height, lower anterior face height, ramus mandibula height, corpus mandibula height, premaxillary length, and maxillary width have been reduced but foramen incisivum width has been increased. This study showed that there is no significant effect of the masticatory hypofunction on the cranial growth and development in the growing rats, but that masticatory hypofunction affected the growth and development of the maxillofacial skeleton.

Animal Nutritional Physiological Phenomena↗
PubMed2003

ENU large-scale mutagenesis and quantitative trait linkage (QTL) analysis in mice: novel technologies for searching polygenetic determinants of craniofacial abnormalities.

Discrepancies in size and shape of the jaws are the underlying etiology in many orthodontic and orthognathic surgery patients. Genetic factors combined with environmental interactions have been postulated to play a causal or contributory role in these craniofacial abnormalities. Along with the soon-to-be-available complete human and mouse genomic sequence data, mouse mutants have become a valuable tool in the functional mapping of genes involved in the development of human maxillofacial dysmorphologies. We review two powerful methods in such efforts: N-ethyl-N-nitrosourea (ENU) large-scale mutagenesis and quantitative trait linkage (QTL) analysis. The former aims at producing a plethora of novel variants of particular trait(s), and ultimately mapping the point mutations responsible for the appearance of these new traits. In contrast, the latter applies intensive breeding and mapping techniques to identify multiple loci (and, subsequently, genes) contributing to the phenotypic difference between the tested strains. A prerequisite for either approach to studying variations in the traits of interest is the application of effective mouse cephalometric phenotype analysis and rapid DNA mapping techniques. These approaches will produce a wealth of new data on critical genes that influence the size and shape of the human face.

Alkylating Agents↗
PubMed1985

History and physical examination by oral and maxillofacial surgeons: the development of a physical assessment course.

Qualified oral surgeons may be granted hospital privileges to perform history and physical examinations on their patients as a result of a JCAH policy change, which became effective in January 1982. Oral surgeons must apply for and be granted this privilege from their affiliate hospitals and must demonstrate their qualifications. Various criteria can be used to assess qualification, including a review of the applicant's training in physical diagnosis in residency training, and participation in physical assessment continuing education programs. Review courses that feature hands-on practice are useful to oral surgeons interested in updating and refining their skills. Since the University of Illinois began offering a review course in 1981, 91 oral surgeons have completed the 2-day intensive review program. A follow-up survey of the participants indicates that the oral surgeons are applying for medical staff privileges. In a survey of 30 oral surgeons who participated in the course during 1982, 13 (43%) indicated that they had obtained the privilege to perform histories and physical examinations from their local hospitals.

Clinical Competence↗
PubMed1990

[Experimental study of growth and development of the dentofacial complex in the rat. Influence of anterior displacement of mandible].

The purpose of this study was to detect the influence on the growth and development of the maxillofacial cranium due to anterior crossbite in early childhood. The author observed the morphological changes of the maxillofacial cranium of rats in which of mandible was induced anterior crossbite artificially. Experimental animals used in this study were closed colony bred Wistar Crj rats. A total of 106 rats consisting of 65 in the experimental group and 41 in the control group were used. In the experiment, the appliance which was applied to the mandibular incisors of rats aged 30 days to induce anterior crossbite. X-ray photos of the head were taken in lateral and parietal at the age of 30, 60, 90 and 120 days and the soft X-ray photo of the right mandible isolated by sacrificing and decapitation of several animals at the respective ages. 1. The experimental rats have a tendency to lose weight in accordance with the appliance. The increase rate of weight in experimental group is similar to that in the control group and it was estimated that the appliance affected their weights a little. 2. The lateral cephalometric observation 1) The tip of the nasal bone was modified upwards in its position with advancing age. 2) In the mandibular angular region an inhibition of posterior growth was observed. 3) The dental arch length of maxilla was shorter and of mandibular was longer. 4) The molar changed its position upward, and the height of the upper facial region including the tooth and facial height had a lowering tendency. 3. The parietal cephalometric observation Parietal head X-ray photo showed a widening tendency of the width of anterior facial cranium and the anterior tip of zygomatic arch.

Animals↗