1,721,074 research outputs found
Friction between archwires of different sizes,cross-section and alloy and brackets ligated with low-friction or conventionalligatures.
No full textAn electromyographic evaluation of bilateral symmetry of masticatory, neck and trunk muscles activity in patients wearing a positioner
Full text linkThe importance to consider cervical lordosis angle during orthodontic treatment planning.
No full textEvaluation of cervical posture following palatal expansion: A 12-month follow-up controlled study (European Journal of Orthodontics (2007) 29 (45-51))
No full textHistological characterization of Sacco’s concentrated growth factors membrane [Caracterización Histológica de la Membrana de los Factores de Crecimiento Concentrados Sacco]
Full text linkAlong with the emerging needs of the dental patients, numerous techniques for oral tissue stimulation and regeneration were developed to be employed in the modern implant rehabilitation therapies. The Concentrated Growth Factors (CGF) are a relatively new therapeutic presidium that can be used for this purpose, enhancing the regenerative potential property of blood cells. Although literature presents numerous studies evaluating the CGF for their clinical uses and efficacy, data regarding their biological characteristics are very few. The present study evaluates and describes the CGF structural morphology by means of classical histological methods, using haematoxilin-eosin and azan mallory stains. A three layers organization with a fibrin complex network was noted, with blood corpuscular elements entrapped, especially in the most external layer. These descriptions enrich the knowledge about this new type of membrane, showing the bio-morphological side of the regenerative techniques. These findings will be useful in clinical practice for the choice of the most suitable technique in each implant rehabilitationAlong with the emerging needs of the dental patients, numerous techniques for oral tissue stimulation and regeneration were developed to be employed in the modern implant rehabilitation therapies. The Concentrated Growth Factors (CGF) are a relatively new therapeutic presidium that can be used for this purpose, enhancing the regenerative potential property of blood cells. Although literature presents numerous studies evaluating the CGF for their clinical uses and efficacy, data regarding their biological characteristics are very few. The present study evaluates and describes the CGF structural morphology by means of classical histological methods, using haematoxilin-eosin and azan mallory stains. A three layers organization with a fibrin complex network was noted, with blood corpuscular elements entrapped, especially in the most external layer. These descriptions enrich the knowledge about this new type of membrane, showing the bio-morphological side of the regenerative techniques. These findings will be useful in clinical practice for the choice of the most suitable technique in each implant rehabilitation
Differences in volume and surface of mandibular condyles among adult patients with skeletal classes I, II, and III
No full textObject: The aim of this study was to evaluate the condylar volumes among a group of 14 to 20 year old pre-orthodontic asymptomatic patients with different skeletal classes. The designation of the volumetric value of a solid has recently become important because it can define by a single number the shape and the surface of an object. By means of a 3D segmental reconstruction, we have been able to define the volumetric value of the facial structure while taking in account its structural cavities, including the nasal cavity, the oral cavity, and the maxillary sinus.
Materials and Methods: 60 young adult Caucasian patients scheduled to receive orthodontic treatments due to overcrowded teeth were included in this study. In order to be included patients had to be free of TMD symptoms, tooth agenesis, presence of posterior occlusal stop. They had not to be submitted to ortognathic surgery, and were not extreme brachycephalics and dolichocephalic.. All patients were examined with a Cone Beam (Iluma). The cephalometric analysis was performed with Dolphin 3D using Dicom files acquired through CBCT. The calculation of the condylar volume and of the condylar surface was done with Mimics software.
Results: Within and among each skeletal class, we found statistically significant differences between the volumes and the surfaces of the mandibular left and right condyles. Patients with a skeletal class III showed values of the condylar volume and condylar surface significantly higher than patients belonging to the other two skeletal classes. The measurements of the condylar surface had wider ranges and higher standard deviations than the measurements of the condylar volumes.
Discussions: The observed differences could be related to the different muscle tone. In support of this observation comes a study by F. Festa et al (2006) that showed how the sEMG activity of the masseter and of the anterior temporal at resting were significantly higher in skeletal class III subjects as compared to subjects in class I and II. However it is important to emphasize that both the class and the type of facial skeleton affect the volume of the condyle. In fact, in another study F. Festa et al (2006) observed how the sEMG activity of the masseter, the anterior temporal, and of the upper trapezius and posterior cervical at mandibular rest position was higher in low angle subjects as compared to high angle and normal angle subjects. This higher sEMG activity may be responable for the volume of the condyle.
Conclusions: With this study we have been able to identify an association between condylar volume and skeletal class. In all groups, the measurements of the condylar surfaces presented a inter-individual variability higher than the measurements of the condylar volumes; this may be due to the existence of microscopical abnormalities (small cavities and sulci) that are able to influence the measurements of the condylar surface.but are not able to significantly influence the measurements of the condylar volume
A knowledge-based algorithm for automatic monitoring of orthodontic treatment: The dental monitoring system. two cases
Full text linkBackground: In the dental field, digital technology has created new opportunities for orthodontists to integrate their clinical practice, and for patients to collect information about orthodontics and their treatment, which is called “teledentistry.” Dental monitoring (DM) is a recently introduced orthodontic application that combines safe teledentistry with artificial intelligence (AI) using a knowledge-based algorithm, allowing an accurate semi-automatic monitoring of the treat-ment. Dental Monitoring is the world’s first SaaS (Software as a Service) application designed for remote monitoring of dental treatment, developed in Paris, France, with Philippe Salah as the Co-founder and CEO. Cases presentation: This report describes two cases in which DM system was essential to achieve the control of certain movements: it was possible to follow the movement, even if complex, such as the anterior cross of an adult patient and a lack of space in the canine of the growing patient. The software analyzed the fit and retention of the aligner, thus ensuring correct biomechanics. They were treated during the COVID-19 pandemic lockdown with aligners. The first case is a growing patient who was monitored during an interceptive orthodontic treatment to manage a retained upper canine. The second case is an adult patient forced to finalize his treatment of upper lateral incisor crossbite. The software analyzed the fit and retention of the aligner, thus ensuring correct biomechanics. Conclusions: DM system appears to be a promising method, useful for improving the interaction between doctor and patient, generally acceptable and useful to patients, even in critical clinical situations, at least in cases with optimal compliance and ability to use the tool properly
Regenerative endodontics procedure of an immature permanent mandibular molar with a necrotic pulp using biodentine: A 16 months radiographic follow-up
No full textElectromyographic activity of masticatory, neck and trunk muscles of subjects with different mandibular divergence. A cross-sectional evaluation.
No full textClear aligners in pediatric age in a case of gingival recession due to malocclusion | [Allineatori in età pediatrica in un caso di recessione gengivale dovuta a malocclusione]
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