RELATIONSHIP BETWEEN THE MAXILLARY CANINES IN AN ECTOPIC AND VARIATION OF THE DIAMETER OF THE TEETH

Aim. A tooth is impacted when its apex is formed but does not erupt as expected during the physiological timeframe of eruption. Maxillary canines, after the third molars are the teeth that more frequently show alterations of their eruptive process.. Maxillary canines can be positioned in ectopic palatal or buccal position. In recent years, an extensive search of the literature has shown a correlation between the palatal ectopic eruption of the canine and size of the dental elements reduced. Purpose of the study was to investigate a relationship between ectopic eruption of the canine oral, dental crowding and increased diameter of the teeth

Quantitative and Qualitative in vivo Analysis of Metal Residuals in the Saliva of Subjects with and without Fixed Orthodontic Appliances

Aim of the Work: The aim of this work was to evaluate Ni e Cr ions in the saliva of subjects with and without fixed orthodontic appliances. Materials and Methods: This was a prospective, non-randomized study of 100 patients, so selected: 50 have undergone fixed orthodontic appliance at least from 24 months; others 50 subjects as control-group, without any fixed and/or removable orthodontic appliance It was conducted according to the Declaration of the World Medical Association of Helsinki. The two selected groups were compatible for age, sex, absence of restoration in amalgam or other metals in the oral cavity. The saliva of all the subjects was collected with standardized sterile methods. The samples were analyzed with an atomic absorption spectrophotometer instrument. Results: Absolute values of the salivary metal ions in the subjects with fixed orthodontic appliances are more than the values observed in the control group, but these values are within the normal range. Conclusion: The results show a greater presence in saliva of Ni and Cr ions in the group with fixed orthodontic device. This research must be deepened because ions released in saliva can have effects both locally and in distant districts

Skull-Cervico-Mandibular Unit: Correlation between Hyoid Bone, Thyroid Gland and Posture

Purpose: The aim of this study is to evaluate the postural control of the patient with pathology or surgery of the neck area. We have examined a group of subjects with thyroid pathology and destined to total thyroidectomy. Method: Our sample comprised 10 patients (7 female and 3 male; mean age 50,9±15,8). They have been submitted to postural examination, before and after total thyroidectomy, using the baropodometric platform, the scoliosismeter and the ocular convergence test. All the values obtained from the baropodometric tests executed before and after thyroidectomy have been compared using a statistical analysis. The T Student test and a significant level of 5% (a=0,05;p£,05) have been used. Results: It appears that total thyroidectomy in examined subjects revealed an improvement of the more representative baropodometric parameters. The 25% of the subjects that before thyroidectomy showed at the examination using the scoliosismeter a tilted body axis (to right or left), after thyroidectomy showed an alignment of the same; in the 10% of the subjects that had the tilted head on one side, this returned centrally. The 70% of the patients that before thyroid removal displayed an anterior inclination of the shoulder blade, after the operation brought back their barycentre. Moreover the subjects that before thyroidectomy displayed an insufficient ocular they improved convergence after thyroidectomy. Clinical Significance: Following the comparison and scrutiny of the above tests, there was improvement in the postural arrangement confirming the tight anatomical link between the thyroid gland and the involved structures in position maintenance

Riequilibrio occluso-funzionale in un soggetto con sindrome di Rett: descrizione di un caso

Rett syndrome is a severe neurodevelopmental disease caused by mutations in the X-linked gene encoding for the methyl-CpG-binding protein MeCP2. The aim of this paper is to show the orthodontic treatment of a little girls affected by Rett syndrom

Gag-reflex control through acupuncture. a case series

Background: Many patients avoid dental appointments because of severe gagging when they have work performed, such as taking impressions. There are several methods known to alleviate gagging, and some studies have suggested that acupuncture may be effective in reducing gag reflex. The aim of the present study therefore was to evaluate whether acupuncture can produce a reduction of the gag reflex. Methods: A total of 20 patients, aged between 19 and 80 years, with history of gag reflex on taking dental impressions, ere recruited. All patients fulfilling the inclusion criteria had an upper and lower dental alginate impression taken without acupuncture, and a second upper and lower alginate impression taken immediately after acupuncture based on traditional Chinese medicine. After each impression, the patients recorded their emetic sensation using a visual analogue scale (VAS). Results: The results showed a significant (p<0.05) reduction in the gag reflex scores after acupuncture. For upper impressions, they fell from 6.8 (1.1) to 1.1 (1.1); and for lower impressions, from 5.45 (1.0) to 0.4 (0.7) (mean (SD)). Conclusions: The findings from our study suggest that acupuncture may be useful for preventing and treating gag reflex, and justifies further study

Correlazione tra status nutrizionale e malocclusione in un gruppo di bambini tra i 3 e i 12 anni d'età

Obesity and malocclusion are two very common disease worldwide affecting both adults and children, posing a threat to the physical and mental health. Our observational study assesses the impact of being obese and overweight in the development of malocclusion among childhood subjects (3-12 year old)

Transverse Asymmetries of the Maxilla Even in Healthy and Apparently Symmetrical Subjects

Abstract: In the formulation of an orthodontic treatment plan, the three-dimensional analysis of the dental arches represents a fundamental moment for the evaluation of all the morphological parameters necessary in order to have a correct and complete diagnosis. In this regard, the study of the dental arches on the horizontal plane is sometimes neglected or not thorough enough. When evaluating the transverse dimensions of the dental upper arche, the presence of an asymmetry is frequently found, and it means that an hemiarch is larger than the other. Furthermore, any variation in one of the three planes of space always involves an alteration also on the other two planes in order to have compensation. The morphology of a bone segment depends on various factors, mainly genetical, acquired and environmental. Regarding the environmental factors, the function determines the morphology, but this in turn determines the function. In the case of unilateral mastication, the upper maxilla will be asymmetrical, so growing patients will have compensation on other skull bones. From these considerations arises the need for a careful study of the horizontal plane of the maxilla in the presence of a malocclusion during diagnostic evaluations. These asymmetries, however, must be evaluated and quantified in the diagnostic phase in order to formulate a correct plan of treatment. The aim of this work is to demonstrate that there are almost always transverse asymmetries of the maxilla, albeit of a slight entity, even in healthy and apparently symmetrical subjects

Validity and reliability of measurements of the parameters of smile aesthetics: a comparison between digital and plaster models

This study aims to evaluate the validity and reliability of the TRIOS3 Color intraoral scanner (3Shape A/S, Copenhagen, Denmark) and its associated Ortho Analyzer™ software in measuring parameters of smile aesthetics compared with measurements on plaster casts. The study sample comprised plaster casts and digital models obtained from 30 subjects. Height (H), mesiodistal diameter (MDD) and connecting space (CS) of the anterior teeth were measured with a digital calliper on the plaster models and with the orthodontic software on the digital models. Validity was assessed using a 2-tailed paired t-test; the reliability of measurements for intra-examiner was evaluated with the Intra-class Correlation Coefficient (ICC). There were no statistically significant differences between the measurements made with the two methods. The ICC is 99% for height and MDD measurements, slightly lower in the evaluation of the CS. Linear measurements made on digital model have clinically acceptable accuracy and reliability. The TRIOS3 Color intraoral scanner represents a valuable tool for dental practice, particularly in evaluating parameters of smile aesthetics

Studio elettromiografico dell'attività del massetere e del temporale anteriore. Soggetti destrimani e mancini

Objectives To establish if oculomotor apparatus, stomatognathic apparatus and postural system are someway related. Materials and methods Ocular deficit, postural stabilization, head inclination and rotation, shoulder position and dental class were assessed by convergence test, cover test, postural and stomatognathic examination in a sample of 22 patients with ocular disease (convergence deficit, strabismus and heterophoria) aged from 10 to 18 years. Results In patients with convergence's deficit, body axis deviated to left (65%) and head inclination to right (65%), right shoulder was higher (68%) and I dental class was observed (49%); in patients with strabismus, body axis deviated to left (54%) and head inclination to left (53%), right shoulder was higher (61%) and II dental class was observed (33%); patients with heterophoria showed head inclination to left (98%), body axis and higher shoulder deviated to left (78%) and I-II dental class (33%)

Malattia celiaca e malocclusione

La celiachia è una malattia autoimmune, causata da una intolleranza permanente al glutine, che si manifesta in individui geneticamente predisposti, causando enteropatia. In questi individui una prolungata esposizione al glutine aumenta il rischio di sviluppare altre patologie, che possono influire nello sviluppo della dentatura e della mucosa orale. Le manifestazioni cliniche sono diverse e atipiche.I pazienti con celiachia possono soffrire di ipoplasia dello smalto, maggiore prevalenza della carie dentale, eruzione ritardata dei denti e riduzione della crescita del mascellare inferiore. Questi fattori predispongono ad una malocclusione