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Biomedical subjects

P Gandini

Publications and source records attributed to P Gandini.

At least 19 recordsLinked to original sources

Early interception of skeletal-dental factors predisposing to temporomandibular disorders during child development.

Temporomandibular disorders (TMD) comprise a heterogoneous group of pathologies or dysfunctions of the temporomandibular joints and their related neuromuscular systems. The multifactoral etiology of these disorders raises serious diagnostic and therapeutic problems. A modern approach demands close collaboration between a number of specialists in order to create the best possible treatment plan. The progressive nature of certain forms of TMD, combined with the major advantages deriving from early treatment, encourage the dental surgeon to carry out early interception of all those dental and/or skeletal anomalies which may determine the dysharmonic function and development of the facial mass, even though such anomalies may not represent the sole causes of the various forms of TMD. The general practitioner, and to an even greater extent the pediatrician, may therefore play a role of primary importance as those medical influences capable of early detection of TMD risk situations.

Age Factors↗

Health evaluation of free-ranging rockhopper penguins (Eudyptes chrysocomes) in Argentina.

As part of annual colony counts in Santa Cruz Province, Argentina, a health survey of rockhopper penguins (Eudyptes chrysocomes) was conducted in 1994. Forty-five birds were examined during handling procedures, and blood and fecal samples were collected for laboratory analysis. All birds appeared to be in good condition. No ecto- or endoparasites were found. Hematology, plasma chemistry, and plasma mineral levels were measured and correlated with the results of bacterial and viral serology. Antibodies against Chlamydia sp., avian adenovirus, avian encephalomyelitis virus, infectious bronchitis virus, avian reovirus, and paramyxovirus-1, -2, and -3 were found. Mean plasma chemistry and mineral values differed between individuals testing positive and negative on serologic tests. There was no serologic evidence of exposure to avian influenza virus, duck viral enteritis, infectious bursal disease, infectious laryngotracheitis, Aspergillus sp., or Salmonella pullorum. Trace amounts of endrin were found in the plasma of one bird, but all other chlorinated pesticide and polychlorinated biphenyl levels were below detectable limits.

Animals↗

Adaptations of masticatory muscles to a hyperpropulsive appliance in the rat.

The plasticity of masticatory muscles was studied by comparing rats that were wearing a protrusive appliance and were kept on a liquid diet with two control groups: (1) pair-fed rats and (2) rats that had free access to ordinary pelleted food. The animals were 45 days old at the beginning of the experiment and were studied for a period of 20 days. Three jaw muscles with different functions were examined: masseter, temporalis, and digastric. Muscle fiber composition was determined (1) by fiber counting after staining with four monoclonal antibodies, which were able to recognize the four major myosin heavy chain (MHC) isoforms and therefore four fiber types (I, IIA, IIX, IIB) and (2) by electrophoresis on 6% polyacrylamide gels. The comparison between free-diet rats and pair-fed rats showed that the change from a hard pelleted diet to a liquid diet caused a shift in fiber type and MHC distribution, characterized by an increase of IIB MHC in temporalis and digastric muscles but not in the masseter muscle. The comparison between pair-fed rats and rats wearing appliances showed on the contrary a decrease in IIB MHC and an increase in IIA and IIX MHC. The results support the conclusions that (1) rat jaw muscles can quickly adapt to functional demand changing their fiber type composition, (2) the changes appear restricted inside the fast fiber population, and (3) fiber-type changes caused by dietary variation are not less than those caused by orthodontic intervention and must be taken into account to assess the effect of the appliance correctly.

Adaptation, Physiological↗

[The handicapped and dental therapy. Personal experience].

Problems binded with dental treatment of handicapped patients and analysis of data obtained in ten years of experiences have been pointed out. The preventive role of oral hygiene, the role of narcosis in treatments and structural lacks come out from this analysis.

Anesthesia, Dental↗

[Epidemiological survey of caries occurrence in school age children].

In this paper a sample of 242 subjects has been examined in order to verify the frequency and diffusion of dental caries in some Elementary school of the Pavia district. The analysis of the outcomes obtained have showed substantial differences between this district and others formerly examined. However a significant decrease of DMF index has been noticed owing to notable work of information made by the teaching-staff. The need of an advertising campaign carried out by specialized staff is emphasized.

Child↗

[Statistical survey of malocclusion in school age children].

The authors describe the results of a research aiming to define the frequency of malocclusion in a sample of 242 subjects frequenting the Prymam School in the Pavia district. At the same time relation between caries and malocclusion have been researched. The importance of habit and bottle-feeding in producing malocclusions is emphasized. The Authors point out the improvement of frequency of malocclusions in comparison with the previous researches.

Bottle Feeding↗

[Oral hygiene motivation in orthodontic patients].

The task of the present study has been to verify experimentally if prolonged motivation may produce better oral hygienic conditions in orthodontic patients. Applying oral hygienic index modified, gingival index and saliva lactobacilli's concentration count, the A.A. obtained encouraging data evaluating the motivated subjects situation versus control group.

Adolescent↗

[Dental age and skeletal age: correlation study].

Authors looked for a correlation between dental and skeletal age, to simplify diagnosis, considering 116 subject's panoramic and carpal radiography. Results unfortunately show that is impossible to estimate skeletal maturation by dental analysis only.

Adolescent↗