Biomedical subjects
Publications and source records attributed to P Defabianis.
It is now established that saliva is important for the health of both soft and hard oral tissues. This article focuses on the role played by saliva in influencing oral structures: the most important factors related to it will be illustrated. The action of saliva and the multifunctional aspects of its components in both detrimental and beneficial effects on oral health are underlined.
To evaluate relationship between consequences of TMJ fractures in children and disturbed facial skeleton growth, 46 children (18 girls, 28 boys), who were 14 years of age or younger and had undergone combined clinical and radiolographic examination for five years were retrospectively analyzed. Imaging studies were performed to investigate symptoms that included, either individually or in various combinations, pain, mechanical TMJ disfunction and facial skeleton abnormalities. The children were divided into two groups: those belonging to the former had been treated by functional orthopedic method alone, while the others had just been treated by physiotherapy. Both TMJs were normal in the patients treated functionally and they all showed normal facial structure, while different types of alterations (ranging from inflammatory to mechanical and structural ones) were observed in the others. We concluded that therapeutic procedures adopted after TMJ fractures in children are essential in minimizing consequences on occlusion and facial development.
The use of resin composite restorations in posterior teeth has become an accepted clinical procedure. Microleakage at the posterior composite/tooth interface is a major problem. The in vitro quality of the marginal seal was tested in eighty teeth extracted for orthodontic reasons using a glass-ionomer cement reinforced with amalgam, two light self-curing glass-ionomer cements and a compomer. All the teeth were subjected to thermocycling to simulate clinical situation. Compomers showed the best mechanical and esthetic properties combined with a good marginal seal.
The problems of performing the apexification technique, the indications and requirements for apexification are discussed. A case report is shown as an example.
The authors consider the problems connected with diagnosis and prognosis of dilaceration. Case reports of varying prognosis importance are given as examples.
The paper describes an experimental health education plan for children in the first and second years of primary school. The plan focuses on nutritional and dietary aspects and the correlations between diet, oral hygiene and dental health.
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A long-term clinical control carried out on 34 patients subjected to surgery for the removal of included extra teeth at the Odontostomatological Clinic of the University of Turin is reported. The patients had mostly been treated at ages between 7 and 12 followed up between 4 and 8 years later. Long-term damage, from an orthodontic viewpoint also, is not frequent and when present is not of particular importance. The operation, carried out early and with correct technique, does not cause particular damage to teeth or adjacent bone or nerve structures and does not create psychological traumas for the young patient. It is therefore advisable for the surgical removal of extra included teeth which are causing damage to adjacent structures to be programmed as early as possible so as to permit maximum functional and aesthetic recovery and to minimise to the utmost the consequences of the operation.
The latest thinking reported by the literature on the amelogenesis and enamel mineralisation process has been synthesised.
The pathology of extra teeth is evaluated on the basis of clinico-operative statistics for the years 1981-1985 and comprising 88 patients for a total of 115 treated teeth. The data obtained confirm the higher frequency of extra teeth in male patients. The most frequent site is easily the frontal sector of the upper arch. At that level, especially in males, two more or less symmetrical extra teeth are not infrequent. These data are in substantial agreement with the epidemiological data reported in the literature. Extra teeth are usually treated by surgical removal followed by orthodontic treatment to correct malformations caused by them and to recover the functional and aesthetic role of the upper front teeth.
We have described and compared the P.C.F. of protusiva and the plaque of Bassani in the correction of the II class and II division by mentioning the advantages of the first one.
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The consequences of not treating improper tongue function may be very important as this organ can influence face development and dental therapy. The role of the tongue in the development of the skeletal structures of the face has been considered in different perspectives over the years. For some, the tongue adapts to the "tongue box," for others the "tongue box" has been created and stabilized by the morphogenetic action of the tongue during development and growth. A case of ankyloglossia treated with lingual frenectomy and followed clinically and radiologically for seven years is reported. Spontaneous upper arch expansion occurred and therefore orthodontic treatment following surgical intervention was unnecessary.
The ideal goal of pulpotomy procedure in a primary tooth is to maintain space length, preserve masticatory function, and remove infection and chronic inflammation from the oral cavity. From a population of 150 patients between the ages of four and seven years, we collected a sample of 30 primary (nine maxillary and twenty-one mandibular) molars used in this investigation. The aim was to observe the presence of accessory channels on the pulpal floor; they were found in twenty-one of the thirty teeth examined. The scanning electron microscope proved to be an excellent means of evaluating the pulpal floor, where failure of pulp treatment often has its cause.
Space maintainers are very important in the prevention of malocclusions. Their indications and limits are described.
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