Biomedical subjects

G Garattini

Publications and source records attributed to G Garattini.

At least 19 recordsLinked to original sources

PubMed1999

Bilateral dental fusion of the upper central incisors: a multidisciplinary approach.

UNLABELLED: The multidisciplinary treatment of a case of bilateral dental fusion of the upper central incisors with maxillary constriction, crowding, and palatal inversion of one of the lateral incisors is reported. The rarity with which this anomaly appears, along with its complex characteristics, often make it extremely difficult to treat. It requires the involvement of different specialists to find the most suitable treatment for each individual patient. CLINICAL SIGNIFICANCE: This particular case of bilateral dental fusion required the involvement of orthodontists, periodontists, endodontists, and restorative specialists. For the individual evaluation of these extremely complex cases, the esthetic and functional results to be reached must be assessed compared to treatment times and biologic and economical costs. The long-term prognoses of these complex therapies also must be borne in mind.

Adolescent↗

PubMed1998

Skeletal and dental modifications produced by the Bionator III appliance.

The therapeutic results of a functional orthopedic treatment with a Balters' Bionator III appliance were evaluated. The sample group included 39 white growing subjects with a dentoskeletal Class III malocclusion. A 2-year study compared results with a control group. The results showed that the Bionator III is effective, especially when the malocclusion is mainly the result of a midfacial deficiency and when there is a hypodivergent growth pattern.

Activator Appliances↗

PubMed1997

Oral environment temperature changes induced by cold/hot liquid intake.

The use of NiTi shape memory alloys, introduced into orthodontics because of their ability to develop light continuous forces that prove more effective than heavy intermittent forces in the teeth movement, requires the mastering of the functional properties of NiTi wires. More specifically, the recovery force acting on the teeth is a sensitive function of temperature: knowledge of oral temperature modifications is therefore required to understand the stress state modification felt during orthodontic therapy. The temperature modifications induced by cold or hot drink intake in the oral cavity were investigated by using arch wires, fixed to removable Hawley retainers, similar to those currently used in orthodontic practice, by means of six temperature sensors placed in correspondence with specific teeth. Similarly, the temperature changes were detected on a metallic frame, fixed onto the palatal zone to a Hawley retainer, where a palatal expander was placed to correct unilateral or bilateral crossbites in deciduous or in early mixed dentition. The maximum temperature change was observed in the interincisor area: The temperature modification on other teeth depends on the modality of drink intake, with the highest temperature variations being detected in the palatal zone. Hence modifications in the stress state during orthodontic therapy with NiTi wires are to be expected.

Beverages↗

PubMed1997

[Lateral teleradiography of the cranium: the effect of head positioning in the interpretation of cephalometric tracings. An experimental study on a phantom].

PURPOSE: To assess the influence of head mispositioning during lateral teleradiography of the skull for cephalometric purposes. MATERIAL AND METHODS: We used a human dry skull fixed on a professional support at a three level angular scale to quantitate lateral and anteroposterior rotations and inclinations. We took 15 radiographs at different angles (-2 degrees and -4 degrees right rotation; +2 degrees and +4 degrees left rotation; -2 degrees and -4 degrees anterior roll; +2 degrees and +4 degrees posterior roll; -2 degrees and -4 degrees right pitch; +2 degrees and +4 degrees left pitch; + 2 degrees left rotation and -2 degrees anterior roll; +2 degrees left rotation and +2 degrees left pitch). RESULTS: The analysis of the 15 radiographic tracings compared with the one obtained with the head positioned correctly showed no substantial differences in angular and linear values; no difference was such as to invalidate tracing. DISCUSSION: When skull malpositioning limited within 4 degrees, the angular and linear measurements of the cephalometric tracing are reliable and accurate. Nevertheless, cephalometric findings must always be integrated with clinical and history data. CONCLUSIONS: We believe that even less than perfect teleradiographs of the skull should be used for cephalometric purposes because, even though they require more care of the dentist to analyze them, the results are reliable and the patient is spared further X-ray exposure.

Adult↗

PubMed1993

[Digital cephalometric teleradiography with storage phosphors. Comparative study].

Digital cephalometric radiography with light-emitting phosphors was performed on 15 patients during an orthodontic survey. Lateral views were performed; digital post-processing was carried out according to 3 different sets of characteristic variables (analogic-like, Xeroradiography-like and custom-made). Comparative cephalometric film radiographs were performed on another group of 15 patients matched for age and clinical problems. All the digital and conventional images were evaluated by 3 independent observers, who scored 0-2 the visibility of 16 cephalometric landmarks. Digital cephalometric radiography always provided good and clear images, which were easy to read by every observer, thanks to contrast optimization in the digital technique and to the possibility of interactive post-processing that could improve the lowest-quality images. The visibility study of 16 cephalometric landmarks resulted in a moderately higher score for film cephalography than for the digital technique (79.6/96 versus 78.1/96). Among digital post-processing variables, the customized curve gave the best results (mean score: 78.8/96). Digital cephalometric radiography allowed marked reduction in radiation dose (approximately 30-40% of conventional radiographs). This is a major factor when considering the widespread use of this technique and the young age of most patients.

Cephalometry↗

PubMed1989

[Optimization of the surgical technic for extraction of the lower third molars].

The high incidence of third molar extraction is related to their frequent pathology. The use of an uncomplicated and reliable diagnostic and therapeutic protocol therefore became extremely important. The protocol has to include careful selection and preparation as well as the appropriate choice of instruments and surgical techniques. This is even more important, considering the elective nature of the procedure and the local and more rarely, systemic complications that could develop.

Humans↗

PubMed1988