Dentoalveolar response after protraction mask and expansion in males and females in the mixed dentition

2002 ◽  
Vol 25 (2) ◽  
pp. 113-117
Author(s):  
Marc Saadia ◽  
Edgar Torres
Keyword(s):  
Mixed Dentition ◽  
Class Iii ◽  
Before And After ◽  
Males And Females ◽  
Mandibular Teeth

The purpose of this study was to determine the dentoalveolar response of class III patients in the mixed and late mixed dentition phases fitted with a protraction mask and expansion. The before and after cephalometric records of 74 patients divided by sex were analyzed at ages 6 to 9 and 9 to 12 years to assess the dentoalveolar changes. Data was correlated by means of paired t tests and Scheffe's multiple contrasts. No significant changes were seen in all dentoalveolar relationships between the ages of 6 to 9 years and 9 to 12 years and between males and females. Maxillary teeth tended to be proclined, while mandibular teeth to become retroclined.

scholarly journals The Impact of Orthodontic Treatment on Pre-Existing Gingival Recessions: A Retrospective Study

2021 ◽  
Vol 11 (19) ◽  
pp. 9036
Author(s):  
Guostė Antanavičienė ◽  
Eglė Zasčiurinskienė ◽  
Dalia Smailienė ◽  
Nomeda Basevičienė
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Negative Impact ◽  
Open Bite ◽  
Class Iii ◽  
Before And After ◽  
Pre Treatment ◽  
Mandibular Teeth ◽  
The Impact ◽  
Plaster Models

(1) Background: This retrospective study aimed to examine the change of gingival recessions (GR) before and after orthodontic treatment (OT). (2) Methods: Patients who had at least one GR on the vestibular surface of maxillary/mandibular teeth mesial to first molars were included. GR was measured on good quality plaster models before and after OT. (3) Results: Significant improvement of mean GR at patient level was found between T0 and T1 (0.45 mm, 95% CI: 0.28, 0.62) (p < 0.001). In 51.4% of patients GRs became better, in 37.8% GRs did not change. and in 10.8% GRs became worse. At tooth level the mean GR improvement was 0.54 mm (CI: 0.42, 0.65; median 0.55 mm Q1; Q3: 0.12, 0.96) (p < 0.001). GR improved in 67 teeth (58.7%), did not change in 41 (36.0%), and worsened in 6 (5.3%). Full healing was observed in 15 teeth. A reduced GR improvement was found in cases with pre-treatment open bite (OR 3.89; CI: 1.35, 11.16; p = 0.008) and dental Class III patients (OR 2.6; CI: 1.11, 6.0; p = 0.026). (4) Conclusion: There was an improvement of GR after OT in more than half of the patients. Class III malocclusion and reduced pre-treatment overbite had a negative impact on GR improvement.

scholarly journals Orthopedic Effect of Chin Cup during Mixed Dentition Stage

2017 ◽  
Vol 18 (5) ◽  
pp. 410-414
Author(s):  
Mohamed I Hashem ◽  
Zeeshan H Ahmad ◽  
Sukumaran Anil ◽  
Khalid J Alanazi
Keyword(s):  
Treated Group ◽  
Mixed Dentition ◽  
Control Group ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Skeletal Changes ◽  
Before And After

ABSTRACT Introduction Chin cup (CC) therapy has been used as the traditional appliance for treating class III malocclusion during mixed dentition period. The aim of this study was to investigate the effect of CC on the improvement of skeletal and dentoalveolar skeletal changes in class III patients during mixed dentition stage. Materials and methods A total of 30 patients (7–9 years old) with skeletal class III malocclusion were selected based on clinical and cephalometric examination. Out of 30 patients, 20 underwent CC therapy. All orthodontic records and measurements were taken before and after treatment. Similar records were collected from the control group. The lateral cephalometric films were traced before and after treatment and analyzed. Results There was a significant improvement in maxillary and the mandibular skeletal measurements after CC therapy. Improvement of ANB angle and an increase in Wits appraisal have been detected in the treated group according to intermaxillary skeletal variables. Conclusion The study concluded that the CC therapy is effective for correcting skeletal class III malocclusion along with positive changes in the dentoskeletal variables during the mixed dentition stage. How to cite this article Al-Khalifa HN, Hashem MI, Alanazi KJ, Anil S. Orthopedic Effect of Chin Cup during Mixed Dentition Stage. J Contemp Dent Pract 2017;18(5):410-414.

scholarly journals A retrospective study of orthodontic treatment with pre-treatment gingival recessions

2020 ◽  
Author(s):  
Guoste Antanaviciene ◽  
Dalia Smailiene ◽  
Nomeda Baseviciene ◽  
Egle Zasciurinskiene
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Negative Impact ◽  
Final Analysis ◽  
Open Bite ◽  
Class Iii ◽  
Lack Of Information ◽  
Before And After ◽  
Pre Treatment ◽  
Mandibular Teeth

Abstract Background: The development of gingival recessions (GR) after orthodontic treatment (OT) is well described in the literature. However, there is a lack of information about the changes in pre-existing GR during OT. Methods: This retrospective study aimed to examine the change of GR before and after OT. Intraoral photographs of 993 patients treated with fixed appliances between 2005 and 2017 were evaluated. Patients who had at least one GR on the vestibular surface of maxillary/mandibular teeth mesial to first molars were included. GR was measured on good quality plaster models before and after OT. The change of GR (T0-T1) was categorised into the three groups: worsened, did not change and improved (this group consisted of GR, which became better but did not disappear, and fully healed, which disappeared after OT)). The change of GR by ≥0.5 mm was recorded. Statistical analysis was performed using SPSS Statistics (Version 22.0. Armonk, NY, USA). Results: Fifty-one (5.1%) patient had ≥1 GR before OT. Of them, 37 (72.5%) patients were included in the final analysis according to the inclusion criteria. GR before OT was found on 114 buccal/labial surfaces.Significant improvement of mean GR at patient level was found between T0 and T1 (0.45 mm, 95% CI: 0.28, 0.62) (p<0.001). At tooth level the median GR improvement was 0.55 (Q1; Q3: 0.12; 0.96) mm (p<0.001). GR improved in 67 teeth (58.7%), did not change in 41 (36.0%), and worsened in 6 (5.3%). Of the 67 GR, which improved, full healing was observed in 15 (22.4%) teeth. There was a lower chance for GR improvement in cases with pre-treatment open bite (OR 3.35; 95% CI: 1.14, 9.84; p=0.03) and dental Class III patients (OR 2.20; 95% CI: 0.92, 5.28; p=0.03). Conclusions: There was an improvement of GR after orthodontic treatment in most cases. Class III malocclusion and reduced pre-treatment overbite had a negative impact on GR improvement.

scholarly journals Retrospective study of orthodontic patients with pre-treatment gingival recessions

2020 ◽  
Author(s):  
Guoste Antanaviciene ◽  
Dalia Smailiene ◽  
Nomeda Baseviciene ◽  
Egle Zasciurinskiene
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Final Analysis ◽  
Open Bite ◽  
Class Iii ◽  
Lack Of Information ◽  
Before And After ◽  
Orthodontic Patients ◽  
Pre Treatment ◽  
Mandibular Teeth

Abstract Background: The occurrence of gingival recessions (GR) after orthodontic treatment (OT) is well described in the literature. However, there is a lack of information about changes to pre-existing GR during OT. Methods: The aim of this retrospective study was to examine the change of GR before and after OT. Intraoral photographs of 993 patients treated with fixed appliances between 2005 and 2017 were evaluated. Patients who had at least one GR on the vestibular surface of maxillary/mandibular teeth mesial to first molars were included. GR was measured on good quality plaster models before and after OT. The change of GR (T0-T1) was categorised into the three groups: worsened, did not change and improved (this group consisted of GR, which became better but did not disappear, and fully healed, which disappeared after OT)). The change of GR by ≥0.5 mm was recorded. Statistical analysis was performed using SPSS Statistics (Version 22.0. Armonk, NY). Results: Fifty-one (5.1%) patient had ≥1 GR before OT. Of them, 37 (72.5%) patients were included in the final analysis according to the inclusion criteria. GR before OT was found on 114 buccal/labial surfaces. The mean GR improvement was 0.51 (95% CI: 0.40, 0.63) mm (p<0.001). GR improved in 71 teeth (62.3%), did not change in 37 (32.4%), and worsened in 6 (5.3%). Of the 71 GR, which improved, full healing was observed in 15 (21.1%) teeth. GR had a greater chance of improvement in cases with a thick/normal gingival biotype compared with the thin biotype (OR 2.4; 95% CI: 1.07; 5.28) (p=0.03). There was a lower chance for GR improvement in cases with pre-treatment open bite (OR 3.29; 95% CI: 1.10; 9.81) (p=0.03) and Class III patients (OR 2.79; 95% CI: 1.14; 6.83) (p=0.03). Conclusions: Based on the results of this retrospective study, we conclude that orthodontic treatment may change and even influence the healing of GR.

scholarly journals Orthodontic decompensation in skeletal Class III malocclusion: redefining the amount of movement assessed by Cone-Beam Computed Tomography

2015 ◽  
Vol 20 (5) ◽  
pp. 28-34 ◽  
Author(s):  
José Antonio Zuega Cappellozza ◽  
Fabio Pinto Guedes ◽  
Hugo Nary Filho ◽  
Leopoldino Capelozza Filho ◽  
Mauricio de Almeida Cardoso
Keyword(s):  
Computed Tomography ◽  
Cone Beam ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Computed Tomographic ◽  
Before And After ◽  
Mineralized Tissues ◽  
Mandibular Teeth ◽  
Tooth Inclination

Introduction:Cone-Beam Computed Tomography (CBCT) is essential for tridimensional planning of orthognathic surgery, as it allows visualization and evaluation of bone structures and mineralized tissues. Tomographic slices allow evaluation of tooth inclination and individualization of movement performed during preoperative decompensation. The aim of this paper was to assess maxillary and mandibular incisors inclination pre and post orthodontic decompensation in skeletal Class III malocclusion.Methods:The study was conducted on six individuals with skeletal Class III malocclusion, surgically treated, who had Cone-Beam Computed Tomographic scans obtained before and after orthodontic decompensation. On multiplanar reconstruction view, tomographic slices (axial, coronal and sagittal) were obtained on the long axis of each incisor. The sagittal slice was used for measurement taking, whereas the references used to assess tooth inclination were the long axis of maxillary teeth in relation to the palatal plane and the long axis of mandibular teeth in relation to the mandibular plane.Results:There was significant variation in the inclination of incisors before and after orthodontic decompensation. This change was of greater magnitude in the mandibular arch, evidencing that natural compensation is more effective in this arch, thereby requiring more intensive decompensation.Conclusion:When routinely performed, the protocols of decompensation treatment in surgical individuals often result in intensive movements, which should be reevaluated, since the extent of movement predisposes to reduction in bone attachment levels and root length.

Orthodontic treatment effect on gingival recessions

2020 ◽  
Author(s):  
Guoste Antanaviciene ◽  
Dalia Smailiene ◽  
Nomeda Baseviciene ◽  
Egle Zasciurinskiene
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Final Analysis ◽  
Open Bite ◽  
Class Iii ◽  
Lack Of Information ◽  
Before And After ◽  
Pre Treatment ◽  
Mandibular Teeth ◽  
Plaster Models

Abstract Background The occurrence of gingival recessions (GR) after orthodontic treatment (OT) is well described in the literature. However, there is a lack of information about changes to pre-existing GR during OT. Methods The aim of this retrospective study was to examine the change of GR before and after OT. Intraoral photographs of 993 patients treated with fixed appliances between 2005 and 2017 were evaluated. Patients who had at least one GR on the vestibular surface of maxillary/mandibular teeth mesial to first molars were included. GR was measured on good quality plaster models before and after OT. The change of GR (T0-T1) was categorised into the three groups: worsened, did not change and improved (this group consisted of GR, which became better but did not disappear, and fully healed, which disappeared after OT)). The change by ≥0.5 mm was recorded. Statistical analysis was performed using SPSS Statistics (Version 22.0. Armonk, NY). Results Fifty-one (5.1%) patient had ≥1 GR before OT. Of them, 37 (72.5%) patients were included in the final analysis according to the inclusion criteria. GR before OT was found on 114 buccal/labial surfaces. The mean GR improvement was 0.51 (95% CI: 0.40, 0.63) mm (p<0.001). GR improved in 71 teeth (62.3%), did not change in 37 (32.4%), and worsened in 6 (5.3%). Of the 71 GR, which improved, full healing was observed in 15 (21.1%) teeth. GR had a greater chance of improvement in cases with a thick/normal gingival biotype compared with the thin biotype (OR 2.4; 95% CI: 1.07; 5.28) (p=0.03). There was a lower chance for GR improvement in cases with pre-treatment open bite (OR 3.29; 95% CI: 1.10; 9.81) (p=0.03) and Class III patients (OR 2.79; 95% CI: 1.14; 6.83) (p=0.03). Conclusions Based on the results of this retrospective study, we conclude that orthodontic treatment may change and even influence the healing of GR.

scholarly journals CBCT Analysis of Changes in Dental Occlusion and Temporomandibular Joints before and after MEAW Orthotherapy in Patients with Nonlow Angle of Skeletal Class III

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Yi Guo ◽  
Xinrui Qiao ◽  
Shiyu Yao ◽  
Tiancheng Li ◽  
Nan Jiang ◽  
...  
Keyword(s):  
Dental Occlusion ◽  
Class Iii ◽  
Skeletal Class ◽  
Institutional Ethics ◽  
Temporomandibular Joints ◽  
Significant Difference ◽  
Before And After ◽  
Mandibular Teeth ◽  
Cbct Analysis ◽  
Medical University

This study focus on the changes of the position and morphology of jaw and condyle after MEAW (the multiloop edgewise arch wire) treatment in adults with a nonlow angle (mean angle or high angle SN−MP>27°) of skeletal class III (mild to moderate skeletal classs III means −5°<ANB<0°) malocclusions measured by CBCT (cone beam computed tomography). Twenty adult patients (aged 17-26) with a nonlow angle of skeletal class III malocclusions were selected in this study taken orthodontic treatment by MEAW. CBCT was taken before and after the treatment to analyze the changes of the jaw and condyle. After treatment, the angle of L7-MP decreased 12.2°, L6-MP decreased 10.5°, L1-MP decreased 8.8° (P<0.001 for each) and U1-SN increased (P<0.05). There was no significant changes between anterior and posterior APDI index and between anterior and posterior spaces of the TMJ (temporomandibular joint) (P>0.05). The linear ratio of the TMJ was the LR>12 before treatment, while it was −12<LR<12 after treatment; however, there was no statistically significant difference between them (P>0.05). There was also no significant change in anterior and posterior position and morphology of the condyle within the joint fossa after the treatment by MEAW in this study. MEAW technology in correcting the class III with nonlow angle patients mainly relies on the compensation of distally and posterior mandibular teeth, rather than the mandible and condyle moving backward to establish a neutral occlusal. This study was approved by the institutional ethics committee of the Second Hospital of Tianjin Medical University (No. KYJJ2013002).

scholarly journals Spinal Muscular Atrophy after Nusinersen Therapy: Improved Physiology in Pediatric Patients with No Significant Change in Urine, Serum, and Liquor 1H-NMR Metabolomes in Comparison to an Age-Matched, Healthy Cohort

Metabolites ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 206
Author(s):  
Leon Deutsch ◽  
Damjan Osredkar ◽  
Janez Plavec ◽  
Blaž Stres
Keyword(s):  
Machine Learning ◽  
Spinal Muscular Atrophy ◽  
1H Nmr ◽  
Pediatric Patients ◽  
Muscular Atrophy ◽  
Male And Female ◽  
Before And After ◽  
Healthy Cohort ◽  
Males And Females ◽  
Urine Serum

Spinal muscular atrophy (SMA) is a genetically heterogeneous group of rare neuromuscular diseases and was until recently the most common genetic cause of death in children. The effects of 2-month nusinersen therapy on urine, serum, and liquor 1H-NMR metabolomes in SMA males and females were not explored yet, especially not in comparison to the urine 1H-NMR metabolomes of matching male and female cohorts. In this prospective, single-centered study, urine, serum, and liquor samples were collected from 25 male and female pediatric patients with SMA before and after 2 months of nusinersen therapy and urine samples from a matching healthy cohort (n = 125). Nusinersen intrathecal application was the first therapy for the treatment of SMA by the Food and Drug Administration (FDA) and the European Medicines Agency (EMA). Metabolomes were analyzed using targeted metabolomics utilizing 600 MHz 1H-NMR, parametric and nonparametric multivariate statistical analyses, machine learning, and modeling. Medical assessment before and after nusinersen therapy showed significant improvements of movement, posture, and strength according to various medical tests. No significant differences were found in metabolomes before and after nusinersen therapy in urine, serum, and liquor samples using an ensemble of statistical and machine learning approaches. In comparison to a healthy cohort, 1H-NMR metabolomes of SMA patients contained a reduced number and concentration of urine metabolites and differed significantly between males and females as well. Significantly larger data scatter was observed for SMA patients in comparison to matched healthy controls. Machine learning confirmed urinary creatinine as the most significant, distinguishing SMA patients from the healthy cohort. The positive effects of nusinersen therapy clearly preceded or took place devoid of significant rearrangements in the 1H-NMR metabolomic makeup of serum, urine, and liquor. Urine creatinine was successful at distinguishing SMA patients from the matched healthy cohort, which is a simple systemic novelty linking creatinine and SMA to the physiology of inactivity and diabetes, and it facilitates the monitoring of SMA disease in pediatric patients through non-invasive urine collection.

scholarly journals Sexual dimorphism in the long-term stability (10 years) of skeletal Class III treatment

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Natalia Tejedor ◽  
Conchita Martín ◽  
José Antonio Alarcón ◽  
María Dolores Oteo-Calatayud ◽  
Juan Carlos Palma-Fernández
Keyword(s):  
Sexual Dimorphism ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Term Stability ◽  
Long Term Stability ◽  
Fixed Appliances ◽  
Males And Females ◽  
Class Iii Treatment

Abstract Background Class III malocclusion is associated with high sexual dimorphism, especially in individuals older than 13 years of age, with significant differences in growth between males and females during the pubertal and postpubertal stages, and in adulthood. The aim of this research was to examine differences between males and females in long-term stability (10 years) of treatment for skeletal Class III malocclusion. Methods Thirty patients (15 males and 15 females) with skeletal Class III malocclusion, who had been treated with rapid maxillary expansion (RME) combined with face mask protraction followed by fixed appliances, were selected sequentially. Thirty patients (15 males and 15 females) with skeletal Class I and mesofacial patterns treated only with fixed appliances for dental problems served as the control group. Differences between groups and sexes were evaluated using lateral cephalograms taken at the start of treatment (T0), immediately after the end of treatment (T1), and after 10 years (T2). The long-term treatment success rate was calculated. Results Ten years after Class III treatment, overjet and overbite relapse occurred similarly in females (− 0.68 ± 0.7 mm; − 0.38 ± 0.75 mm, respectively) and males (− 1.09 ± 1.47 mm; − 0.64 ± 0.9 mm, respectively); the ANB angle and Wits appraisal became significantly more negative in males (− 1.37 ± 1.06°; − 2.7 ± 2.53 mm) than in females (− 0.18 ± 1.26°; − 0.46 ± 1.94 mm). The success rate was 73.3% in males and 80% in females. Conclusions Significant differences in the long-term stability of Class III treatment outcomes have been found between males and females, with a larger skeletal Class III relapse and lower long-term success rates in males.

Sex Differences in the Effect of Testosterone on Adipose Tissue Insulin Resistance from Overweight to Obese Adults

2021 ◽  
Author(s):  
Xiaohui Li ◽  
Jia Liu ◽  
Biao Zhou ◽  
Yinhui Li ◽  
Zhengyu Wu ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Sex Differences ◽  
Adipose Tissue ◽  
Protective Factor ◽  
Class Iii ◽  
Obese Adults ◽  
Testosterone Levels ◽  
Class Iii Obesity ◽  
Males And Females ◽  
Potential Factors

Abstract Objective Adipose tissue distribution and glucose metabolism differ between men and women. Few studies have investigated sex differences in adipose tissue insulin resistance (adipose-IR). Herein, we investigated sex differences in adipose-IR in adults ranging from overweight to obese and the potential factors associated with sex differences in adipose-IR. Methods A total of 424 adults had their BMI, adipose-IR, and sex hormones evaluated. Based on BMI, males and females were assigned to four groups. Results In total, males (n=156) had higher adipose-IR than females with similar BMIs (n=268) (p&lt;0.05). Adipose-IR progressively increased from overweight to class III obesity in both males and females (all p&lt;0.0001); however, only in the class III obesity group was the adipose-IR significantly higher in males than in females (p=0.025). There were significant differences in testosterone between males and females (all p&lt;0.01); testosterone levels were negatively correlated with adipose-IR (r=-0.333, p&lt;0.001) in males but positively correlated with adipose-IR (r=0.216, p&lt;0.001) in females. For the logistic regression analysis, testosterone was an independent protective factor against adipose-IR in males, with an odds ratio of 0.858 (B= -0.153 [95% CI 0.743-0.991], p=0.037). Conclusions Adipose-IR reflects the progressive deterioration in adipose tissue insulin sensitivity from overweight to obesity in both males and females. Males with class III obesity have more severe adipose-IR than similarly obese females. The sex difference is associated with testosterone, and low testosterone levels may contribute to more severe adipose-IR in obese males.

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