2,263 research outputs found
A New Appliance for Class III Treatment in Growing Patients: Pushing Splints 3
No full textSeveral orthopedic procedures have been used in early treatment to reduce the need for orthognathic surgery in skeletal Class III. The most used treatment is Rapid Maxillary Expansion and Facemask. This procedure also determines a clockwise rotation of the mandible, increasing the vertical dimensions of the lower third of the face. Therefore, the control of vertical dimension appears to be a key objective in Class III hyperdivergent patients. This article shows two skeletal Class III patients treated with a new appliance (Pushing Splints 3), that is able to correct sagittal discrepancy with a good control of the vertical growth. In both cases, Class I relationship with a proper Overjet and Overbite was achieved with improvement of profile. The final cephalometric values demonstrated a stable sagittal relationship and a good control of the vertical growth. The specific biomechanic features of the PS3 appliance permit the improvement of the sagittal jaw relationship, delivering at the same time vertical vectors that are able to control the alveolar and skeletal components of the vertical growth. This could be useful in the treatment of Class III hyperdivergent patients
Evaluation of the debonding strength of orthodontic brackets using three different bonding systems
No full textDifferences in craniofacial growth of Class II individuals from different decades: A retrospective study
No full textAbstract
Objectives: To detect changes in mandibular growth between a historical group (HG)
from the American Association of Orthodontics Foundation Craniofacial Growth
Legacy Collection (AAOF Legacy) and a contemporary group (CG) of normodivergent
or hypodivergent Class II untreated subjects.
Setting and Sample Population.: The sample included radiographs from the AAOF
Legacy and from the University of Naples ‘Federico II’ collected during a previous RCT.
Materials & Methods: The HG was composed of 26 individuals (around 1960) from the
AAOF Legacy (15 from theBurlington Growth Study, nine from the Oregon Growth Study
and two from the Michigan Growth Study) who were matched by sex, age and race with
the 26 individuals of the CG (around 2010). Two lateral cephalograms obtained at T0 and
T1 (12 months) were selected, and one examiner performed the cephalometric measure‐
ments according to Pancherz's method. The normal distribution of data was confirmed
by the Shapiro‐Wilk test, MANOVA analysis and t test for paired and unpaired data were
performed. The level of significance was set according to Bonferroni's correction.
Results: At T0 and T1, the between‐group comparisons revealed greater linear di‐
mensions for Maxillary base, Maxillary incisor and Mandibular incisor in the CG than in
the HG (P ≤ 0.002). No significant difference was found in the growth rate for linear
skeletal measurement between the HG and the CG.
Conclusions: In this study, the cephalometric analysis showed larger maxillary dimen‐
sions for the CG than the HG, while no differences were shown between the growth
rate and direction of the two groups
"Canine First Technique”, An Innovative Approach in Maxillary Impacted Canines: A Case Report
No full textBehavior of plain synthetic resins and resins baked on gold and porcelain baked onto gold after a prolonged stay in certain experimental solutions
No full text
Ingestione di magneti
No full textThe article reports the case of an 11-year-old boy who presented with abdominal symptoms following the ingestion of three magnets. The history, the radiologic and endoscopic pictures gave the opportunity for some considerations about the peculiarities of the management of such dangerous foreign bodies. Surgery showed that the three magnets - one in the esophagus and the other two in the gastric fundus - attracted one another just above the esophagogastric junction causing an esophageal pseudodiverticulus. The magnets were removed without any further complication. Some recent statements on the management of ingested magnets are briefly discussed
Prevalence of psychosocial findings and their correlation with TMD symptoms in an adult population sample
No full textAbstract Background and aim Some studies suggested an association between Temporomandibular Disorders (TMD) and psychosocial status, but most of them are focused on samples of patients looking for treatment or present limits of sample representativeness. The aim of the present study was to evaluate the psychosocial status in a large sample of adult population, further than to assess its association to TMD symptoms, oral behaviours, and self-reported facial trauma. Results the study sample included 4299 subjects older than 18 years randomly recruited from general population in public spaces during their daily life (1700 Males, 2599 Females mean ± SD age = 40.4 ± 18.1). Psychosocial status and pain-related disability were assessed by means of Patient Health Questionnaire 4 (PHQ-4) and Graded Chronic Pain Scale (GCPS). TMD symptoms were assessed by RDC/TMD and validated screening tools for TMD pain. Oral Behaviours Checklist was used to investigate on oral behaviours. Logistic regression model was used to evaluate the association of the psychosocial status, TMD symptoms, trauma, and oral behaviours. The association was tested using both univariate and multivariate models. The PHQ4 evaluation showed a severe impairment in 4.6% of our sample, moderate in 18.8% and mild in 32.5%. We found a Characteristic Pain Intensity (CPI) level and Interference Score greater that 30 respectively in 36.2% and 22.2% of the study sample. The GCPS status revealed a high disability with severe limitation in 2.5% of the sample, high disability with moderate limitation in 7.0%, low disability high pain intensity in 7.4% and low disability low pain intensity in 37.8%. Anxiety and depression’s levels were significantly associated with gender, TMD pain, coexistence of TMD Pain and sound, and oral behaviours. GCPS status was significantly associated with age, TMD Pain, coexistence of TMD pain and sound, trauma, and oral behaviours. Conclusions In the general population, psychosocial impairment is associated to TMD pain, female gender, and report of oral behaviours. Hence, in adults with TMD accompanied by pain, psychosocial status should also be evaluated
In vitro cytotoxicity of different thermoplastic materials for clear aligners
No full textObjectives: To investigate the in vitro cytotoxicity of different thermoplastic materials for clear
aligners on human primary gingival fibroblasts (HGFs).
Materials and Methods: Four materials for clear aligners were considered in this study: Duran
(Scheu-Dental GmbH, Iserlohn, Germany), Biolon (Dreve Dentamid GmbH, Unna, Germany),
Zendura (Bay Materials LLC, Fremont, CA, USA), and SmartTrack (Align Technology, San Jose,
CA, USA). Three out of four materials (Duran, Biolon, Zendura) were assessed as thermoformed
and nonthermoformed, whereas the SmartTrack was assessed only as thermoformed. The
samples were placed at 378C in airtight test tubes containing Dulbecco’s Modified Eagle’s Medium
(DMEM; 0.1 mg/mL) for 14 days. The cell viability of HGFs cultured with this medium was assessed
by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Data were
analyzed by means of one-way and two-way analysis of variance and post hoc tests (a 1⁄4 0.05).
Results: Each material exhibited a slight cytotoxic effect after 14 days. The highest cytotoxicity
level on HGFs was achieved by Biolon (64.6% 6 3.3 of cell viability), followed by Zendura (74.4%
6 2.3 of cell viability), SmartTrack (78.8% 6 6.3 of cell viability), and finally Duran (84.6% 6 4 of
cell viability), which was the least cytotoxic. In the comparison between nonthermoformed and
thermoformed materials for Duran, Biolon, and Zendura, the thermoformed materials showed the
highest level of cytotoxicity (P , .001).
Conclusions: Under the experimental conditions of this study, all the materials for clear aligners
presented a slight cytotoxicity. Biolon was the most cytotoxic and the thermoforming process
increased the cytotoxicity of the materials. (Angle Orthod. 0000;00:000–000.
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