Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “DENTAL APPARATUS”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 397 records · Page 22Linked to original sources
PubMed1999

Discontinuity of life conditions at the transition from the Roman imperial age to the early middle ages: Example from central Italy evaluated by pathological dento-alveolar lesions.

Teeth are highly informative in the study of past human populations. In particular, the occurrence of lesions in the masticatory apparatus relates diseases, diet, and living conditions. The dental pathology of three skeletal samples from the north-central part of Latium (central Italy) is reported. Two of them belong to the Roman Imperial Age (1st-3rd century AD): the first (including 942 permanent teeth and 1,085 tooth sockets) represents the rural town of Lucus Feroniae and is mainly composed of slaves and/or war veterans, whereas the second (872 permanent teeth and 1,325 tooth sockets) comes from the Isola Sacra necropolis at Portus Romae and represents the "middle class" segment of an urban population. The medieval sample (912 teeth and 1,097 tooth sockets), dated to the 7th century AD, belongs to the Lombard necropolis of La Selvicciola. All of the samples were examined for caries, abscesses, antemortem tooth loss, calculus, alveolar resorption, attrition, and enamel hypoplasia; standard methods were used to identify, classify, and quantify these conditions. The results reveal different patterns of dental and alveolar lesions for the three populations, indicating a different combination of dietary factors and hygienic conditions in the Roman samples compared to the Lombard series. As evidenced by multivariate correspondece analysis, the Romans show afffinites between each other, whereas the Medieval sample appears associated with the incidence of caries and the pathological conditions related to them, thus indicating increase of these lesions and deterioration of the quality of life in the transition to the early Middle Ages. These data agree with the respective archeological characterizations of the necropolises and the hypothetical social composition of each population. Am. J. Hum. Biol. 11:327-341. Copyright 1999 Wiley-Liss, Inc.

Journal Article↗
PubMed1990

Agenesis or hypoplasia of major salivary and lacrimal glands.

We described a young man with almost total absence of the parotid glands, hypoplasia of both lacrimal glands, marked hypofunction of both submandibular glands, and left nasolacrimal duct atresia. Lack of tearing, severe dental caries, and conjunctival scarring following chronic xerophthalmia and conjunctivitis serve to alert pediatricians to this autosomal dominant disorder with considerable variation in expressivity.

Abnormalities, Multiple↗
PubMed1981

Cytochemical studies on the ferritin-containing vesicles of the rat incisor ameloblasts with special reference to the acid phosphatase activity.

Acid phosphatase was localized in rat incisor ameloblasts without prior decalcification. When beta-glycerophosphate was used as the substrate, an intense reaction was observed in the supranuclear region of the secretory ameloblasts. But the reaction was dramatically reduced at the transitional stage and was very weak in the maturation ameloblasts. When p-nitrophenylphosphate was the substrate, the reaction product was consistently seen in the Golgi cisternae and the vesicular components of the ameloblasts at all stages of enamel development. These observations suggest that there are two acid phosphatases in ameloblasts. One is in the secretory ameloblasts and the other in the transition and maturation ameloblasts. X-ray microanalyses for Fe and Pb showed that Fe and acid phosphatase were in the ferritin-containing vesicles at the later stage of enamel maturation. This evidence suggests that ferritin is digested in these vesicles for the release of the Fe pigment to the enamel. An increase in the number of intercellular bridges between ameloblasts was correlated with the dramatic decrease in height of ameloblasts at the pigment release stage. The ameloblast membranes were acid phosphatase positive at the intercellular bridges when p-nitrophenylphosphate was the substrate. This activity may be involved in the reduction in the surface area of the ameloblast membranes.

4-Nitrophenylphosphatase↗
PubMed1979

Ameloblasts: secretory and resorptive functions.

The sequence of steps which an ameloblast passes through in forming enamel appears remarkably similar in amphibian and man. Despite considerable improvements in understanding the early events in the life cycle that lead to the intracellular synthesis and secretion of enamel matrix by the cell, little is known about the cell's functional role at later stages of the life cycle when the extracellular enamel matrix undergoes classical maturation in becoming fully mineralized.

Ameloblasts↗
PubMed1998

Viscoelasticity and aging of dental composites.

Effects of aging on several dental composites were studied using a torsion creep apparatus. A constant torque was applied from 1 second to 3 hours, and recovery was observed from 10 seconds to 2 days, for specimens aged from 3 hours to 8 weeks following polymerization. Specimens aged for shorter times exhibited more creep and less complete recovery than specimens aged for longer times. Modulus and creep results were qualitatively consistent with a composite model for particulate inclusions.

Bisphenol A-Glycidyl Methacrylate↗
PubMed2006

[Interception in the primary dentition: mastication and neuro-occlusal rehabilitation].

After evoking the characteristics of masticatory movements, their control and their adaptability, a review of the literature illustrates how the masticatory work and its variations can influence the dentoalveolar, as well as the maxillary growth, by adapting the morphological structures to the functional context. The conceptions of Planas, and especially his "neuro-occlusal rehabilitation", are widely explained: unilateral alternate mastication, "Planas' Functional Masticatory Angles (PFMA) and the vertical dimension, the "atrophies" of maxillary development resulting from reduced mastication, the "dominant unilateral mastication syndrome" and, of course, all the original treatments introduced by Planas. These specific orthodontic treatments can be applied as interceptive procedure as early as during the deciduous dentition. The selective occlusal grinding, implemented to reduce and balance the "PFMA", and the expansion devices using "running track plates" are described in concepts and clinical uses. Planas' Class II treatments of Class II, also using "direct occlusal bonded tracks" and several mandibular propulsion auxiliaries are explained as well as the early treatments of lateral cross-bite and the use of the "Equiplan". Mastication, the first of the functions assigned and carried out by the masticatory apparatus, is a genuine "functional matrix" able to stimulate the growth of the dental arches and of the maxillaries. When perfectly understood and applied, the "neuro-occlusal rehabilitation" according to Planas allows to restore a functional balance for the masticatory apparatus from an early age, and subsequently, reorientates growth to a morphological normalization.

Child, Preschool↗
PubMed1979

[The routine use of the orthopantomograph as a diagnostic aid in dental practice].

An amount of 667 radiographs, taken by the Orthopantomograph (OPG) has been examined concerning their pathological statements--as there are restrained and displaced wisdom-teeth, apical granuloma, radices relictae, displaced dentes canini and premolars. The Orthopantomograph, by it's clear graph of maxilla and jaw, turns out to be a diagnostic means of high value. The high amount of pathological statements makes the routine use of the apparatus for the first examination of new patients in the dental praxis an indispensable necessity.

Dental Offices↗
PubMed1991

[A bacteriological study of supragingival bacterial plaque in subjects undergoing orthodontic therapy].

Direct contact between tooth enamel and bacteria is currently considered a sine qua non of tooth decay. Any condition which encourages the deposit and accumulation of bacterial plaque represents a risk factor for tooth decay. Dental therapy often entails the use of bands or brackets which house metal apparatus used to apply force or support mobile devices (plates, etc.). It is therefore possible to hypothesise that, by preventing its mechanical removal, dental treatment can lead to quantitative and qualitative changes in bacterial plaque.

Bacteria, Aerobic↗
PubMed1980

An overview of immunology with special reference to oral disease.

This overview of the current state of knowledge of the immune system as it is relevant to the oral cavity in health and disease, is presented to illustrate the significance of immunology to the practice of dentistry. Thus immunological mechanisms contribute in a major way to the pathogenesis of the two most common dental disorders and it may be that the ultimate control of dental caries may be through manipulation of the mucosal immune apparatus. Future advances require a clearer and more quantitative analysis of oral mucosal immunity in relation to health and disease.

Antigens↗
PubMed1991

Functional evaluation following microvascular oromandibular reconstruction of the oral cancer patient: a comparative study of reconstructed and nonreconstructed patients.

Over the past decade, the use of free flap transfers in head and neck surgery has led to remarkable advances in the reliability and the ultimate results of oromandibular reconstruction. Stable and retentive dental restorations have been achieved using enosseous implants placed directly into the vascularized bone flaps. However, the functional assessment of patients who underwent primary mandibular reconstruction with these techniques has not been previously reported. A group of 10 reconstructed and 10 nonreconstructed segmental hemimandibulectomy patients were compared using a battery of tests to assess their overall well-being, cosmesis, deglutition, oral competence, speech, length of hospitalization, and dental rehabilitation. In addition, objective measures of the masticatory apparatus (interincisal opening, bite force, chewing performance, and chewing stroke) were used to compare these two groups as well as normal healthy subjects and edentulous patients restored with conventional and implant-borne dentures. The results show a clear advantage for the reconstructed patients in almost all categories. Persistent problems and future directions in oromandibular reconstruction are discussed.

Adult↗