PubMed Health⌕ Search

Biomedical subjects

M Ronchin

Publications and source records attributed to M Ronchin.

At least 19 recordsLinked to original sources
PubMed1994

Aesthetics with lingual orthodontics: resolving Class II malocclusions with molar distalization.

This work emphasizes the most recent aspects and innovations in the field of lingual orthodontics. Proper case selection and the advantages and disadvantages of these innovations are outlined, and cases are discussed in which the lingual approach seems to have been faster and more efficient. Among the nonextraction cases, a method of distalizing the second maxillary molars is described. This biomechanical procedure is well suited for the Class II malocclusions, solving the problem without bicuspid extraction. The objective of this article is to present these innovations in lingual orthodontics to a larger segment of the profession. A clinical case is used to illustrate the molar distalization procedure.

Adult↗
PubMedDate not supplied

[Risk profiles in agriculture: activities in the region of Lombardy].

Agriculture represents a very complex scenario that needs proper tools. To this aim, in the frame of Special Project "La Prevenzione nell'impiego di Antiparassitari in Agricoltura" promoted by the Region of Lombardy, profiles of exposure and/or risk have been identified as valid approach able to define particular conditions of exposure and risk for the operator in particular settings. The evaluation necessarily needs to identify the most important parameters affecting exposure and their extent on magnitude of exposure. Therefore, field studies should be further performed in order to confirm and improve the profile. The identification of profiles of exposure and risk is an activity still in progress that need to be carefully set up and standardised. The team involved in the study identified priorities deserving much attention in Lombardy, and planned a three years programme aimed at define the profile of exposure and risk in viticulture, maize crop, rice growing, nursery gardening, horticulture in greenhouses, maintenance of gardens, and poplar growing.

Agriculture↗
PubMedDate not supplied

[Relationship of orthodontics and periodontal support].

The Authors, in the light of available data in the published literature and using their own personal experience as a basis, examine the relationship existing between orthodontia and periodontology, giving prominence to the more immediate and dynamic aspects of the comparison. An obvious cause-and-effect relationship often links the position of the teeth and the periodontal pathology; if this relationship is understood by the orthodontist, it can guide him in his choice of treatment, both where curative treatment is required but also, and more importantly, where prevention can be provided. Emphasis is placed on how serious can be the damages caused to the periodontium where the monitoring of the bacterial plaque and of the inflammation which it brings about is not sufficiently constant. Certain programs of treatment are proposed which, using orthodontal methods, can make a substantial contribution to solving periodontal problems, the kind of problems which are hard to control when traditional methods are used.

Adolescent↗
PubMedDate not supplied

[Splinting technique for traumatic luxation of anterior permanent teeth].

Extrusive luxations of both, upper and lower incisors, represent a frequent event in dental traumatology. The Authors present some cases in which elastic splints have been used. In fact recent researches show that, even soon after a traumatic event, is not indicated to immobilize teeth with rigid fixed splints because they don't allow any dental function. It is therefore preferable the use of elastic splints for 2-4 weeks, instead of rigid splints for long periods. The Authors then describe the techniques, the methods and the radiographic controls and pulp tests used in this kind of traumatic pathology, showing the positive long term results obtained by using elastic splints instead of rigid splints which often present as result root resorptions or pulp necrosis. In fact with elastic splints is possible to replace and maintain luxated teeth, allowing at the same time a certain function of teeth and their support tissues.

Dental Pulp Necrosis↗
PubMedDate not supplied

[Dyslalia and orofacial dysmorphism].

In the light of reported data and personal experience, relations between malocclusions and dyslalias are examined. Although the coexistence of malocclusions and dyslalia is a frequent clinical observation, correlations between the two conditions do not appear to be closely linked by any clearly identifiable cause-effect relationship. Considering the high number of aetiological factors involved, stress is laid on the need for a multidisciplinary approach to cases that present contemporaneously malocclusions and dyslalias in the interests of correct diagnosis and rational therapeutic orientation.

Cleft Palate↗
PubMedDate not supplied

[Mortality among lead-zinc miners in Val Seriana].

The mortality experience of 1392 lead-zinc-silver miners (Gorno, Northern Italy) employed in the period 1/1/1950-31/12/1980 and followed-up to 31/12/1986 was examined. Two separate estimates of the radon exposure level are available: 0.60 and 0.36 working levels respectively. The silica exposure level was not assessed. Vital status was ascertained for 95.6% of the cohort members and their mortality was compared with expected deaths based on national rates. Significant excess mortality from esophageal cancer, stomach cancer, lung cancer, respiratory tuberculosis, respiratory diseases and deaths from external causes was found among underground miners. Surface workers show significantly increased mortality from liver and bile ducts cancer, hepatic cirrhosis, respiratory tuberculosis and respiratory diseases. Based on the 16.4 excess lung cancer cases among underground miners and their cumulative radon exposure, an attributable risk estimate ranging from 9.78 and 16.31 cases per million person-years and WLM (Working Level Month) was calculated.

Adolescent↗
PubMedDate not supplied

[Documentation of orthodontic clinical cases. Photography in orthodontics. 2].

We have analysed the bases of information about the feasibility of orthodontic photography. After giving details about the photographic equipment and the field lighting we gave a thorough description of the operative modalities of intra and extraoral photos. We have given special emphasis to the framing phase which is of great importance for successful photograms. This is important both for projection and setting together of case display. Eventually the most frequent mistakes are pointed out. A useful dialogue for daily clinical practice is given hereby.

Dental Equipment↗
PubMedDate not supplied

[Documentation file of orthodontic clinical records. Plaster study models. 3].

Cast models are to be considered a basic element of analysis in orthodontics. This work aims at describing the various operating phases which are necessary for obtaining successful results when preparing these diagnostic records. In fact the various steps are concurrently shown developing from the initial impressions to the polishing and final labelling especially emphasizing Tweeds' trimming method.

Calcium Sulfate↗