scholarly journals Assessment of first molars sagittal and rotational position in Class II, division 1 malocclusion

2013 ◽  
Vol 18 (6) ◽  
pp. 106-111 ◽  
Author(s):  
Paulo Estevão Scanavini ◽  
Renata Pilli Jóias ◽  
Maria Helena Ferreira Vasconcelos ◽  
Marco Antonio Scanavini ◽  
Luiz Renato Paranhos
Keyword(s):  
Class Ii ◽  
Chi Square ◽  
Mean Values ◽  
Significance Level ◽  
Significant Difference ◽  
Division 1 ◽  
Chi Square Test ◽  
Student’S T ◽  
The Right ◽  
Class Ii Division 1

OBJECTIVE: This study assessed the anterior-posterior positioning of the upper and lower first molars, and the degree of rotation of the upper first molars in individuals with Class II, division 1, malocclusion. METHODS: Asymmetry I, an accurate device, was used to assess sixty sets of dental casts from 27 females and 33 males, aged between 12 and 21 years old, with bilateral Class II, division 1. The sagittal position of the molars was determined by positioning the casts onto the device, considering the midpalatal suture as a symmetry reference, and then measuring the distance between the mesial marginal ridge of the most distal molar and the mesial marginal ridge of its counterpart. With regard to the degree of rotation of the upper molar, the distance between landmarks on the mesial marginal ridge was measured. Chi-square test with a 5% significance level was used to verify the variation in molars position. Student's t test at 5% significance was used for statistical analysis. RESULTS: A great number of lower molars mesially positioned was registered, and the comparison between the right and left sides also demonstrated a higher number of mesially positioned molars on the right side of both arches. The average rotation of the molars was found to be 0.76 mm and 0.93 mm for the right and left sides, respectively. CONCLUSION: No statistically significant difference was detected between the mean values of molars mesialization regardless of the side and arch. Molars rotation, measured in millimeters, represented ¼ of Class II.

Impact of functional orthodontic treatment on facial attractiveness of children with Class II division 1 malocclusion

2019 ◽  
Vol 42 (2) ◽  
pp. 144-150 ◽  
Author(s):  
Sergio Paduano ◽  
Roberto Rongo ◽  
Rosaria Bucci ◽  
Giuseppe Carvelli ◽  
Iacopo Cioffi
Keyword(s):  
Orthodontic Treatment ◽  
Facial Attractiveness ◽  
Class Ii ◽  
Upper Lip ◽  
Chi Square ◽  
Lower Lip ◽  
Division 1 ◽  
Chi Square Test ◽  
Functional Appliances ◽  
Class Ii Division 1

Summary Background/objectives Whether orthodontic treatment with functional appliances improves facial aesthetics is still under debate. This study aimed to determine whether functional orthodontic treatment improves the facial attractiveness of patients with Class II division 1 malocclusion. Materials/method Extraoral lateral photographs of 20 children with Class I (CLI, 11.7 ± 0.8 years), and before (T1) and after treatment (T2) photographs of patients with Class II division 1 (CLII T1 and CLII T2; mean age ± SD = 11.1 ± 0.6 years) treated with functional appliances, were transformed into black silhouettes. Three panels of examiners including 30 orthodontists (39.0 ± 10.1 years), 30 dentists (40.0 ± 9.7) and 30 laypersons (39.0 ± 9.2) evaluated the attractiveness of patients’ silhouettes using a 100-mm visual analogue scale, and the sagittal position of patients’ upper lip, lower lip, and chin using a 3-point Likert scale. Two-way ANOVA and a chi-square test were used to test differences among groups. Statistically significance was set as P  <  0.05. Results The silhouettes of CLII T2 individuals were more attractive than those of the other groups (all Ps < 0.001). The upper lip, lower lip, and the chin of these individuals were judged to be normally positioned in 69.5 per cent, 74.9 per cent, and 72.3 per cent of the assessments, respectively (all Ps < 0.05). Limitations This study did not account for the psychological profile of the examiners, which may have affected the ratings. Conclusions/implications Orthodontic treatment with functional appliances is associated with a superior facial profile attractiveness. Functional treatment should be considered as a treatment option to improve the facial appearance of children with Class II division 1 malocclusion.

scholarly journals SKELETAL AND DENTAL CHANGES INDUCED BY BIONATOR IN EARLY TREATMENT OF CLASS II

2016 ◽  
Vol 38 (2) ◽  
pp. 205
Author(s):  
Dirceu Barnabé Raveli ◽  
João Paulo Schwartz ◽  
Taísa Boamorte Raveli ◽  
Ary Dos Santos Pinto ◽  
Bryan Tompson
Keyword(s):  
Early Treatment ◽  
Treatment Time ◽  
Class Ii ◽  
Treated Group ◽  
Control Group ◽  
Differential Growth ◽  
Chi Square ◽  
Significance Level ◽  
Chi Square Test ◽  
Student’S T

The purpose was to investigate the amount of skeletal and dentoalveolar changes after early treatment of Class II, Division 1 malocclusion with bionator appliance in prepubertal growing patients. Forty Class II patients were divided in two groups. Treated group consisted of 20 subjects treated consecutively with bionator. Mean age at the start of treatment (T0) was 9.1 years, while it was 10.6 years at the end of treatment (T1). Mean treatment time was 17.7 months. Pretreatment and post-treatment cephalometric records of treated group were evaluated and compared with a control group consisted of 20 patients with untreated Class II malocclusion. Intergroup comparisons were performed using Student’s t-tests and chi-square test with Yates’ correction at a significance level of 5 per cent. Bionator appliance was effective in generating differential growth between the jaws. Cephalometric skeletal measurements ANB, WITS, Lafh, Co-A and dental L6-Mp, U1.Pp, IsIi, OB, OJ showed statistically significantly different from the control. Bionator induced more dentoalveolar changes than skeletal during treatment in prepubertal stage. 

scholarly journals Prevalence of temporomandibular disorder and its association with stress and anxiety among university students

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Larissa Aparecida Benincá Ton ◽  
Iago Gomes Mota ◽  
Janice Sympson De Paula ◽  
Ana Paula Varela Brown Martins
Keyword(s):  
University Students ◽  
Temporomandibular Disorder ◽  
Signs And Symptoms ◽  
Female Gender ◽  
Chi Square ◽  
Mean Values ◽  
Significance Level ◽  
Exact Test ◽  
Significant Difference ◽  
Student’S T

Objective: The objective was to evaluate the prevalence of Temporomandibular Disorders (TMD) and the association with stress and anxiety among university students. Material and Methods: The Fonseca Anamnestic Index, Trait-State Anxiety Inventory (IDATE) and LIPP Stress Symptom Inventory (LIPP) were applied for 714 voluntaries. Descriptive and inferential statistical analyzes were performed using the chi-square or Fisher's exact test and the Student's t-test or ANOVA, significance level of 5%. Results: The prevalence of TMD was 68.63%, 46.9% had mild TMD. There was a statistically significant difference between the means of age and the severity of the TMD, higher mean values for severe TMD (22.5 ± 3.3 years). There was a statistically significant association between the female and TMD, higher prevalence of mild TMD. Among the volunteers diagnosed with TMD, a significant number were diagnosed without stress, but there was a statistically significant association between those diagnosed with stress and mild TMD, anxiety and TMD, (state: moderate anxiety and DTM - 50%; trait: moderate and severe anxiety and mild DTM - 49.3% and 49.87%, respectively). Conclusion: There was a high prevalence of TMD signs and symptoms, with higher prevalence in the female gender, mild TMD was more significant, and anxiety and stress were significantly present among university students with TMD signs and symptoms.KeywordsTemporomandibular disorder; Anxiety; Psychological stress.

Comparative Dentoskeletal Study of Class II Division 1 and Class II Division 2 Malocclusion Subjects

2011 ◽  
Vol 1 (1) ◽  
pp. 36-41
Author(s):  
Jyoti Dhakal
Keyword(s):  
Class Ii ◽  
Class Ii Malocclusion ◽  
Basic Difference ◽  
Cephalometric Radiograph ◽  
Significant Difference ◽  
Division 1 ◽  
Dentoskeletal Morphology ◽  
Division 2 ◽  
Dental Cast ◽  
Class Ii Division 1

The dentoskeletal characteristics of Class II malocclusion subjects were evaluated using cephalometric radiograph and dental cast of 60 untreated patients. The sample included 30 Class II Division 1 and 30 Class II Division 2 malocclusion patients. The inter-canine, inter-premolar, inter-molar, inter-canine alveolar, inter-premolar alveolar, inter-molar alveolar widths are measured on study models. The result showed statistically significant difference between the groups for mandibular inter-canine width only. The cephalometric analysis revealed that SNB angle was responsible for the skeletal sagittal difference between the two groups except for the position of maxillary incisors. No basic difference in dentoskeletal morphology existed between Class II Division 1 and Class II Division 2 malocclusions.

scholarly journals A Randomized, Controlled, Parallel-Group, Trial on the Effects of Melatonin on Fatigue Associated with Breast Cancer and Its Adjuvant Treatments

2021 ◽  
Vol 20 ◽  
pp. 153473542098834
Author(s):  
Abdolazim Sedighi Pashaki ◽  
Kamal Mohammadian ◽  
Saeid Afshar ◽  
Mohammad Hadi Gholami ◽  
Abbas Moradi ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Adjuvant Chemotherapy ◽  
Intervention Group ◽  
Chi Square ◽  
Significance Level ◽  
Severe Fatigue ◽  
Before And After ◽  
Brief Fatigue Inventory ◽  
Chi Square Test ◽  
Student’S T

Objective: Fatigue associated with malignant conditions and their treatments is a disabling condition. This trial assessed the anti-fatigue effects of melatonin coadministration during adjuvant treatment of patients with the breast cancer. Material and Methods: Patients with breast cancer were randomly assigned to receive melatonin or placebo during adjuvant chemotherapy and radiotherapy. Thirty-seven patients were randomly enrolled in each group. The mean ages of patients in the intervention and control groups were 50.47 ± 10.79 and 46.05 ± 10.55 years, respectively ( P = .223). The intervention group received oral melatonin (18 mg/day) from 1 week before until 1 month after the adjuvant radiotherapy. The level of fatigue was assessed before and after intervention using Brief Fatigue Inventory (BFI) in both groups. To analyze data, the Student’s t-test and the Chi-square test were used at a significance level of P ≤ .05. Results: The BFI score was similar before the intervention in both groups, however, after the intervention, it was significantly lower in the melatonin group ( P < .001). Moreover, the frequency of severe fatigue in the melatonin group was significantly lower than in the placebo group after intervention (42.1% vs 83.3%, P < .001). Conclusion: Coadministration of melatonin during adjuvant chemotherapy and radiotherapy of women with breast cancer decreased the levels of fatigue associated with the malignant condition and its treatments.

Resorbable Collagen Barrier Impeding the Extrusion of Obturating Material in Primary Molars Undergoing Resorption – A Randomized Clinical Trial

2021 ◽  
Vol 45 (5) ◽  
pp. 312-316
Author(s):  
Mishra Neha Sanjeev ◽  
Harsimran Kaur ◽  
Sandeep Singh Mayall ◽  
Rishika ◽  
Ramakrishna Yeluri
Keyword(s):  
Test Group ◽  
Primary Molars ◽  
Control Group ◽  
Chi Square ◽  
Significance Level ◽  
Significant Difference ◽  
Chi Square Test ◽  
Group A ◽  
Group B ◽  
And Control

Objective: To evaluate the effectiveness of placing a resorbable collagen barrier in impeding the extrusion of obturation material in primary molars undergoing resorption. Study design: All the 94 canals in 47 mandibular molars were allocated to 2 groups- Group ‘A’- 47 canals with collagen barrier (Test group) and Group ‘B’- 47 canals without collagen barrier (Control group) based on randomization protocol. Pulpectomy was performed and obturation of both test and control canals were radiographically assessed. Pearson’s chi – square test was applied to analyze the results. The significance level was predetermined at p &lt; 0.05. Results: Among the test group, 93.6% of the canals showed no extrusion while, 6.4% showed visible extrusion of the material outside the apex. In the control group, 83% showed no extrusion whereas 17% of the canals showed visible extrusion outside the apex. But no significant difference was noted (p&gt;0.05). Conclusion: The placement of resorbable collagen barrier in the apical third of the canal prevented the extrusion of obturating material beyond the apex in resorbing primary molars.

scholarly journals Position of lips and tongue in rest in newborns with and without ankyloglossia

CoDAS ◽  
2021 ◽  
Vol 33 (6) ◽  
Author(s):  
Silvia Márcia Andrade Campanha ◽  
Roberta Lopes de Castro Martinelli ◽  
Durval Batista Palhares
Keyword(s):  
Visual Inspection ◽  
Cross Sectional Study ◽  
University Hospital ◽  
Sectional Study ◽  
Hospital Data ◽  
Chi Square ◽  
Cross Sectional ◽  
Significance Level ◽  
Significant Difference ◽  
Chi Square Test

ABSTRACT Purpose Verify the position of lips and tongue at rest in newborns with and without ankyloglossia. Methods Cross-sectional study, carried out with 130 newborns in University Hospital. Data collection was performed by the researcher and speech-language pathologists from the Hospital. Information on gestational age, sex, weight, height and days of life was collected. The position of the lips and tongue at rest was evaluated through visual inspection with the newborns asleep. After the newborns were awakened, Neonatal Screening of the validated Protocol for the evaluation of the lingual frenulum for infants was performed to detect the alteration of the lingual frenulum. The data obtained were described and submitted to statistical analysis using the Chi-Square test to verify the association between the position of the lips with the tongue and to compare the position of the lips and tongue with and without ankyloglossia. The Mann-Whitney test was used to verify the behavior of the variables the differed between newborns with and without ankyloglossia. The significance level of 5% was adopted. Results When comparing the data, a significant difference was found between: weight and height with and without ankyloglossia; position of lips and tongue. An association between the position of the tongue and lips with and without ankyloglossia was also found. Conclusion Newborns without alteration of the lingual frenulum have a tendency to remain with their lips closed and their tongue elevated during rest and newborns with ankyloglossia have a tendency to keep their lips parted and their tongue low during rest.

scholarly journals Craniometric study of the Orbital Index in brazilian skulls

2021 ◽  
Vol 69 ◽  
Author(s):  
Larissa Chaves Cardoso FERNANDES ◽  
Patrícia Moreira RABELLO ◽  
Bianca Marques SANTIAGO ◽  
Marcus Vitor Diniz de CARVALHO ◽  
Manoel Raimundo de SENA JÚNIOR ◽  
...  
Keyword(s):  
Mixed Race ◽  
Cross Sectional Study ◽  
Southeastern Brazil ◽  
Cross Sectional ◽  
Significance Level ◽  
Brazilian Sample ◽  
Significant Difference ◽  
Student’S T ◽  
The Right ◽  
Student’S T Test

ABSTRACT Objetive To determine the percentage of correctness of the Orbital Index (OI) for estimation of sex, ancestry and age in Brazilian skulls. Methods Cross-sectional study of 183 human dry skulls from the southeastern Brazil. A total of 100 skeletons were males and 83 females; of which 36 were aged up to 39 years, 60 aged between 40 and 59 years, and 87 aged 60 years or older. As for ancestry, 103 were from white, 51 mixed race, and 29 black individuals. The OI was calculate by the formula = height/width x 100. The data were submitted to Student’s t test, F (ANOVA), Tukey and Kruskal Wallis tests as well as to discriminant analysis, with a 5% significance level. Results The sample was characterized as mesoseme, with a mean age of 56.62 (±19.97) years. No significant difference was observed (p=0.511) between the OI in females (right: 86.43 ± 6.58 and left: 86.70 ± 5.93) and males (right: 85.78 ± 6.69 and left: 86.37 ± 6.20). There were no significant differences between age, ancestry and the variables analyzed (p>0.05). The right and left orbital widths were significantly dimorphic between sexes (p<0.001). The percentage of correctness of the method for estimation of sex, age and ancestry was found to be 65.6%, 43.7%, and 43.6%, respectively. Conclusions The OI is not an appropriate method for estimation of sex, ancestry and estimation of age in this Brazilian sample. The methodology should be expanded to other population groups so that it can be improved.

scholarly journals Comparison of arch width, alveolar width and buccolingual inclination of teeth between Class II division 1 malocclusion and Class I occlusion

2012 ◽  
Vol 83 (2) ◽  
pp. 246-252 ◽  
Author(s):  
Rui Shu ◽  
Xianglong Han ◽  
Yating Wang ◽  
Hui Xu ◽  
Dongqing Ai ◽  
...  
Keyword(s):  
Class Ii ◽  
Class I ◽  
Posterior Teeth ◽  
Mandibular Arch ◽  
Arch Width ◽  
Significant Difference ◽  
Division 1 ◽  
Maxillary Premolars ◽  
Mandibular Posterior Teeth ◽  
Class Ii Division 1

ABSTRACT Objective: To compare the arch width, alveolar width, and buccolingual inclination of maxillary and mandibular posterior teeth between Class II division 1 malocclusion and Class I occlusion. Materials and Methods: Forty-five subjects with Class I occlusion and 45 subjects with Class II division 1 malocclusion were selected to measure the maxillary and mandibular arch width and alveolar width of premolars and first molars with digital caliper. Buccolingual inclination of maxillary and mandibular premolars and first molars were measured with a modified universal bevel protractor. Results: All of the posterior teeth in both groups were lingually tilted. The maxillary premolars and first molars were significantly more lingually tilted (P &lt; .05) in Class II division 1 malocclusion than in Class I occlusion. Mandibular first premolars were significantly less lingually tilted in Class II division 1 malocclusion than in Class I occlusion. No significant difference of buccolingual inclination was found in mandibular second premolars and first molars between the two groups. No significant difference in maxillary and mandibular arch width and alveolar width was found between the two groups. Conclusions: Buccolingual inclination rather than arch width and alveolar width plays an important role in transverse discrepancy of Class II division 1 malocclusion.

scholarly journals Evaluation of crestal bone resorption around cylindrical and conical implants following 6 months of loading: A randomized clinical trial

2017 ◽  
Vol 11 (03) ◽  
pp. 317-322 ◽  
Author(s):  
Naser Sargolzaie ◽  
Hamid Reza Arab ◽  
Marzieh Mohammadi Moghaddam
Keyword(s):  
Bone Loss ◽  
Chi Square ◽  
Pocket Depth ◽  
Significance Level ◽  
Crestal Bone Loss ◽  
Significant Difference ◽  
Chi Square Test ◽  
Male Patients ◽  
Maxilla And Mandible

ABSTRACT Objective: The purpose of this clinical study was to evaluate the effect of implant body form (cylindrical and conical implants) on crestal bone levels during 6 months' follow-up after loading. Materials and Methods: A total of 32 SPI implants (19 conical implants/13 cylindrical implants) were randomly placed in 12 male patients using a submerged approach. None of the patients had compromising medical conditions or parafunctional habits. Periapical radiographs using the parallel technique were taken after clinical loading and 6 months later. Clinical indices including pocket depth and bleeding on probing (BOP) were recorded on 6-month follow-up. Data were analyzed by independent samples t-test and Chi-square test with a significance level of 0.05. Results: Six months after loading, crestal bone loss was 0.84 (±0.29) mm around the cylindrical implants and 0.73 (±0.62) mm around the conical types, which was not significantly different (P = 0.54). Pocket depth around the cylindrical and conical implants was 2.61 (±0.45) mm and 2.36 (±0.44) mm, respectively (P = 0.13). BOP was observed among 53.8% and 47.4% of the cylindrical implants and conical (P = 0.13). Bone loss and pocket depth in the maxilla and mandible had no significant difference (P = 0.46 and P = 0.09, respectively). Conclusion: In this study, although bone loss and clinical parameters were slightly higher in the cylindrical implants, there was no significant difference between the conical- and cylindrical-shaped implants.

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