scholarly journals Comparison of Changes in Dental Arch Dimensions in Cases Treated with Conventional Appliances and Self-Ligating Damon System

2018 ◽  
Vol 12 (1) ◽  
pp. 1137-1146 ◽  
Author(s):  
Naiara Carolina Jacob Lima ◽  
Izabel Cristina de Mendonça Campos Freitas Falcão ◽  
Karina Maria Salvatore de Freitas ◽  
Darwin Vaz de Lima ◽  
Fabrício Pinelli Valarelli ◽  
...  
Keyword(s):  
Treatment Time ◽  
Conventional Group ◽  
Dental Arch ◽  
Mandibular Arch ◽  
Irregularity Index ◽  
Intergroup Comparison ◽  
Show Difference ◽  
Treatment Changes ◽  
Group 2 ◽  
Maxillary Arch

Proposition: The objective of this study was to compare changes in maxillary and mandibular dental arch dimensions in cases treated nonextraction with conventional appliances and self-ligating Damon System. Materials and Methods: initial (T1) and final (T2) dental casts of 45 patients with Class I malocclusion treated nonextraction, with slight to moderate crowding, divided into two groups. Group 1: 21 patients treated with self-ligating Damon appliances, at a mean initial age of 18.37 years and mean treatment time of 2.11 years. Group 2: 24 patients treated with conventional appliances, at a mean initial age of 19.50 years and mean treatment time of 1.99 years. The model analysis was performed; Little irregularity index was used to evaluate crowding and arch form was evaluated by measurements in maxillary and mandibular arches including intercanine, interpremolar (first and second premolars) and intermolar distances and arch length. The intragroup comparison was performed with dependent t or Wilcoxon tests and intergroup comparison, with independent t or Mann Whitney tests. Results: In intergroup comparison of treatment changes (T2-T1) the Damon group presented an increase in maxillary transversal dimensions significantly greater than the conventional group. The change in maxillary arch length did not show difference between the groups. Regarding the mandibular arch, the Damon group presented a significantly greater increase in intercanine and inter first premolars than the conventional group. In The mandibular arch length, the greater and significant increase was observed in the groups of patients treated with conventional appliances. Conclusions: The treatment with the Damon appliances resulted in a significantly greater increase of maxillary arch dimensions when compared to conventional appliances. Mandibular intercanine and interpremolar distances also presented greater increase in Damon than conventional appliances. The increase in mandibular arch length was greater in conventional than in Damon group.

scholarly journals Dentoalveolar mandibular changes with self-ligating versus conventional bracket systems: A CBCT and dental cast study

2015 ◽  
Vol 20 (3) ◽  
pp. 50-57 ◽  
Author(s):  
Marcio Rodrigues de Almeida ◽  
Cristina Futagami ◽  
Ana Cláudia de Castro Ferreira Conti ◽  
Paula Vanessa Pedron Oltramari-Navarro ◽  
Ricardo de Lima Navarro
Keyword(s):  
Orthodontic Treatment ◽  
Pearson Correlation ◽  
Dental Arch ◽  
Bone Thickness ◽  
Mandibular Arch ◽  
Conventional Brackets ◽  
Group 2 ◽  
Student’S T ◽  
Transversal Width ◽  
Conventional Bracket

OBJECTIVE: The aim of the present study was to compare dentoalveolar changes in mandibular arch, regarding transversal measures and buccal bone thickness, in patients undergoing the initial phase of orthodontic treatment with self-ligating or conventional bracket systems. METHODS: A sample of 25 patients requiring orthodontic treatment was assessed based on the bracket type. Group 1 comprised 13 patients bonded with 0.022-in self-ligating brackets (SLB). Group 2 included 12 patients bonded with 0.022-in conventional brackets (CLB). Cone-beam computed tomography (CBCT) scans and a 3D program (Dolphin) assessed changes in transversal width of buccal bone (TWBB) and buccal bone thickness (BBT) before (T1) and 7 months after treatment onset (T2). Measurements on dental casts were performed using a digital caliper. Differences between and within groups were analyzed by Student's t-test; Pearson correlation coefficient was also calculated. RESULTS: Significant mandibular expansion was observed for both groups; however, no significant differences were found between groups. There was significant decrease in mandibular buccal bone thickness and transversal width of buccal bone in both groups. There was no significant correlation between buccal bone thickness and dental arch expansion. CONCLUSIONS: There were no significant differences between self-ligating brackets and conventional brackets systems regarding mandibular arch expansion and changes in buccal bone thickness or transversal width of buccal bone.

scholarly journals Comparison of dentoskeletal and soft tissue effects of Class II malocclusion treatment with Jones Jig appliance and with maxillary first premolar extractions

2019 ◽  
Vol 24 (2) ◽  
pp. 56-65
Author(s):  
Daniela Cubas Pupulim ◽  
José Fernando Castanha Henriques ◽  
Guilherme Janson ◽  
Fernanda Pinelli Henriques ◽  
Karina Maria Salvatore Freitas ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Treatment Time ◽  
Class Ii ◽  
Treatment Protocols ◽  
Soft Tissue Profile ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Treatment Changes ◽  
Group 2 ◽  
Cephalometric Changes

Abstract Objective: The aim of this study was to compare the cephalometric changes in Class II division 1 malocclusion patients treated with Jones Jig appliance or with maxillary first premolar extractions. Methods: The sample consisted of 88 lateral cephalograms of 44 patients, divided into two groups. Group 1 consisted of 21 patients treated with Jones Jig appliance, with a mean initial age of 12.88 ± 1.23 years and final mean age of 17.18 ± 1.37 years, and a mean treatment time of 4.29 years. Group 2 comprised 23 patients treated with maxillary first premolar extractions, with a mean initial age of 13.59 ± 1.91 years and mean final age of 16.39 ± 1.97 years, and a mean treatment time of 2.8 years. Intergroup treatment changes were compared with t and Mann-Whitney tests. Results: Class II correction in G2 (maxillary first premolar extractions) presented significantly greater maxillary retrusion, reduction of anteroposterior apical base discrepancy, smaller increase in the lower anterior face height and significantly greater overjet reduction than G1 (Jones Jig). Conclusions: Treatment with maxillary first premolar extractions produced greater overjet reduction, but the two treatment protocols produced similar changes in the soft tissue profile.

scholarly journals Comparative effects of the Mandibular Protraction Appliance in adolescents and adults

2018 ◽  
Vol 23 (3) ◽  
pp. 63-72 ◽  
Author(s):  
Bruno D’Aurea Furquim ◽  
Guilherme Janson ◽  
Laura de Castro Cabrera Cope ◽  
Karina Maria Salvatore Freitas ◽  
José Fernando Castanha Henriques
Keyword(s):  
Soft Tissue ◽  
Treatment Time ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Mandibular Incisor ◽  
Lateral Cephalograms ◽  
Intergroup Comparison ◽  
Tissue Changes ◽  
Group 2 ◽  
Soft Tissue Changes

ABSTRACT Objective: The aim of this study was to compare the skeletal, dental, and soft tissue effects of the Mandibular Protraction Appliance (MPA) application in adolescent and adult Class II malocclusion patients. Methods: The sample comprised the pretreatment and posttreatment lateral cephalograms of 39 subjects presenting Class II malocclusion treated with the MPA and fixed appliances. Sample was divided into two groups: Group 1 comprised 23 subjects (10 male; 13 female), at a mean pretreatment age of 11.75 years, with a mean treatment time of 3.32 years; Group 2 included 16 subjects (7 male; 9 female), at a mean pretreatment age of 22.41 years, with a mean treatment time of 4.24 years. Intergroup comparison of the initial and final stages and treatment changes between the groups was performed with t tests, at p< 0.05. Results: The adults showed less significant amounts of skeletal, dentoalveolar and soft tissue changes than the adolescents. There was significantly greater palatal tipping of the maxillary incisors and retrusion of the upper lip in the adolescents. The adult group showed greater mandibular incisor proclination in the posttreatment stage. Conclusion: Adult patients treated with MPA showed less significant amounts of skeletal, dentoalveolar and soft tissue changes than adolescents.

Occlusal Changes from Primary to Permanent Dentitions

1986 ◽  
Vol 13 (4) ◽  
pp. 187-193 ◽  
Author(s):  
T. D. Foster ◽  
M. C. Grundy
Keyword(s):  
Longitudinal Study ◽  
Class Ii ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
Dental Arch ◽  
Mandibular Arch ◽  
The Individual ◽  
Simple Count ◽  
Maxillary Arch

A longitudinal study was undertaken to assess the persistance of occlusal features of the primary dentition at five years into the permanent dentition at 12 years. It was found that although there was a broad measure of predictability there was variation in detail which made forecasting unreliable in the individual patient. Generally speaking, incisal overjet and overbite changed very little between the two dentitions, but those changes which occurred were in both directions, and the direction of change could not be predicted. The sagittal relationships of the dental arch were also relatively stable, but where change occurred it tended to be in a Class II direction, with the mandibular arch becoming more retroposed in relation to the maxillary arch. The prediction of crowding of the permanent dentition from a simple count of spaces in the primary dentition, while generally reliable, was not accurate in every individual patient.

scholarly journals Posttreatment and physiologic occlusal changes comparison

2012 ◽  
Vol 83 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Karina Maria S. Freitas ◽  
Guilherme Janson ◽  
Bryan Tompson ◽  
Marcos Roberto de Freitas ◽  
Tassiana Mesquita Simão ◽  
...  
Keyword(s):  
Peer Assessment ◽  
Untreated Group ◽  
Anterior Crowding ◽  
Irregularity Index ◽  
Intergroup Comparison ◽  
Group 3 ◽  
The Mean ◽  
Group 2 ◽  
Observation Period ◽  
Group 1

ABSTRACT Objective: To compare posttreatment and postretention occlusal changes with the physiologic occlusal changes caused by natural development of untreated subjects. Materials and Methods: The sample was divided into three groups. Group 1 comprised 97 subjects treated with four premolar extractions at a mean pretreatment (T0) age of 13.03 years, a mean posttreatment (T1, first observation) age of 15.12 years, and a mean postretention (T2, second observation) age of 20.52 years. The mean observation period (T2-T1) was 5.39 years. Group 2 comprised 58 subjects treated nonextraction at a mean pretreatment age of 12.83 years, a mean posttreatment age of 14.99 years, a mean postretention age of 20.22 years, and a mean observation period of 5.22 years. Group 3 comprised 114 untreated subjects at a mean age at T1 of 14.91 years and at T2 of 20.48 years. The mean observation period was 5.56 years. Dental casts were evaluated using the Peer Assessment Rating (PAR) index and the Little irregularity index in maxillary and mandibular arches. Changes in PAR and Little indexes were compared among the three groups by analysis of variance and Tukey tests. Results: Intergroup comparison showed that at T1 and T2 the treated groups presented smaller PAR and Little indexes than the untreated group. In the observation period, the treated groups showed greater increase in PAR and Little maxillary indexes than the untreated group. The extraction group showed a greater increase of the Little mandibular index than the untreated group. Conclusions: The treated groups showed more changes according to PAR and Little maxillary indexes than the untreated group. The posttreatment change of the mandibular anterior crowding of the treated extraction group was greater than the mandibular crowding caused by physiologic changes in the untreated group.

scholarly journals Efficacy of MI Paste® on Bleaching-Related Sensitivity: Randomized Clinical Trial

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Shaista Rashid ◽  
Mohamed ElSalhy
Keyword(s):  
Clinical Trial ◽  
Thermal Sensitivity ◽  
Intervention Group ◽  
Tooth Bleaching ◽  
Control Group ◽  
Mandibular Arch ◽  
Significant Difference ◽  
Mi Paste ◽  
Group 2 ◽  
Maxillary Arch

Background. To evaluate the effectiveness of MI Paste® in reducing sensitivity associated with vital tooth bleaching. Methods. This randomized controlled split-mouth clinical trial included 45 subjects that were randomly divided into two groups. In Group 1, the maxillary arch was the control arch (only bleaching), while the mandibular arch was the intervention arch (bleaching and MI Paste®). In Group 2, the mandibular arch was the control arch (only bleaching), while the maxillary arch was the intervention arch (bleaching and MI Paste®). Subjects started with the control arch and then switched to the intervention arch after two weeks. Subjects were instructed to use MI Paste® in a custom tray for 5 minutes, wait for 1 hour, and then bleach overnight using a different tray. Sensitivity was measured using both a thermal sensitivity test and a daily log of sensitivity for 14 days. Shade was evaluated using a colorimeter and a shade guide. Results. Immediately after treatment, the thermal test sensitivity scores for the arches bleached without MI Paste® were greater than those with MI Paste® ( p = 0.011 ). Arches not receiving the MI Paste® treatment showed significantly higher VAS sensitivity scores during the 14-day period of bleaching ( p = 0.002 ). The mean score for the 14-day period was 37.9 for the arches not treated with MI Paste® versus 27.5 for the treated arches. Both the intervention group and the control group showed significantly lighter shade relative to baseline ( p < 0.001 ) with no significant difference between them ( p = 0.42 ). Conclusion. MI Paste® significantly reduced the sensitivity associated with bleaching and did not interfere with shade change.

Early Assessment of Dental Arch Development in Repaired Unilateral Cleft Lip and Unilateral Cleft Lip and Palate versus Controls

2005 ◽  
Vol 42 (4) ◽  
pp. 385-391 ◽  
Author(s):  
Ann Garrahy ◽  
Declan T. Millett ◽  
Ashraf F. Ayoub
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Control Group ◽  
Dental Arch ◽  
Class Iii ◽  
Early Assessment ◽  
Cross Sectional ◽  
Mandibular Arch ◽  
The Mean ◽  
Maxillary Arch

Objective To evaluate dental arch relationships and dimensions, relative to an age matched noncleft sample, in Caucasian 3-year-old children with repaired unilateral cleft lip (UCL) or unilateral cleft lip and palate (UCLP). Design Prospective, cross-sectional, case-control study performed in Scotland, U.K. Participants Eleven children with repaired unilateral cleft lip, 16 children with repaired unilateral cleft lip and palate, and 78 children as controls. Main Outcome Measures Dental arch relationships and linear arch dimensions. Results Prevalence of Class III incisor relationship was 31.3% in children with unilateral cleft lip and palate compared with 9.1% in children with unilateral cleft lip. A buccal crossbite was present in 36% of children with unilateral cleft lip, compared with 75.6% of children with unilateral cleft lip and palate. Mean linear maxillary arch dimensions did not differ significantly between children with unilateral cleft lip and the controls. Except for second intermolar width, statistically significant differences existed in mean linear maxillary arch dimensions between the unilateral cleft lip and the unilateral cleft lip and palate groups; the mean linear maxillary arch dimensions were significantly greater in the control group than in the unilateral cleft lip and palate group. The mean cleft-affected anterior quadrant length appeared to be the arch dimension with the greatest power of discrimination among the three groups. There were no significant differences in mean linear mandibular arch dimensions among the three groups. Conclusions Anterior crossbite was almost three times more common in the unilateral cleft lip and palate group than in the unilateral cleft lip group. Mean linear maxillary arch dimensions differed significantly between the unilateral cleft lip and palate group and the control group. There were no significant differences in mean linear maxillary arch dimensions between unilateral cleft lip and controls or between mean linear mandibular arch dimensions for unilateral cleft lip, unilateral cleft lip and palate, and controls.

scholarly journals An In Vivo Confocal Microscopic Study of Corneal Nerve Morphology in Unilateral Keratoconus

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Natasha Kishore Pahuja ◽  
Rohit Shetty ◽  
Rudy M. M. A. Nuijts ◽  
Aarti Agrawal ◽  
Arkasubhra Ghosh ◽  
...  
Keyword(s):  
Nerve Fiber ◽  
Nerve Branch ◽  
Intergroup Comparison ◽  
Corneal Nerve ◽  
Group 3 ◽  
Group 2 ◽  
Branch Density ◽  
Corneal Nerve Morphology ◽  
Group 1

Purpose.To study the corneal nerve morphology and its importance in unilateral keratoconus.Materials and Methods.In this prospective cross-sectional study, 33 eyes of 33 patients with keratoconus in one eye (Group 3) were compared with the other normal eye of the same patients (Group 2) and 30 eyes of healthy patients (Group 1). All patients underwent detailed ophthalmic examination followed by topography with Pentacam HR and in vivo confocal microscopy (IVCM). Five images obtained with IVCM were analyzed using an automated CCmetrics software version 1.0 for changes in subbasal plexus of nerves.Results.Intergroup comparison showed statistically significant reduction in corneal nerve fiber density (CNFD) and length (CNFL) in Group 3 as compared to Group 1 (p<0.001andp=0.001, resp.) and Group 2 (p=0.01andp=0.02, resp.). Though corneal nerve fiber length, diameter, area, width, corneal nerve branch density, and corneal total branch density were found to be higher in decentered cones, only the corneal nerve branch density (CNBD) was found to be statistically significant (p<0.01) as compared to centered cones.Conclusion.Quantitative changes in the corneal nerve morphology can be used as an imaging marker for the early diagnosis of keratoconus before the onset of refractive or topography changes.

scholarly journals Adjunctive surgery after total arch distalization to optimize esthetics

2020 ◽  
Vol 10 ◽  
pp. 185-190
Author(s):  
Ahmad Abdulwhab ◽  
Ja Hyeong Ku ◽  
Fawaz Alfawaz ◽  
Jae Hyun Park ◽  
Yoon-Ah Kook
Keyword(s):  
Case Report ◽  
Adult Patient ◽  
Treatment Duration ◽  
Orthodontic Treatment ◽  
Mandibular Arch ◽  
Palatal Plate ◽  
Total Treatment ◽  
Maxillary Arch

This case report presents surgically assisted orthodontic treatment for an adult patient due to labial exostosis, prominent malar, and unesthetic chin. Her treatment was total arch distalization with modified C-palatal plate for maxillary arch and miniscrews for mandibular arch. In addition, she was treated with alveoloplasty, malarplasty, and genioplasty to improve the consistency of her profile. The total treatment duration was 28 months.

scholarly journals Association between arch perimeter management and the occurrence of mandibular second molar eruption disturbances:

2021 ◽  
Author(s):  
Lucas Garcia Santana ◽  
Kimberlly Avelar ◽  
Leandro Silva Marques
Keyword(s):  
Randomized Clinical Trials ◽  
Treatment Time ◽  
Risk Of Bias ◽  
Second Molar ◽  
Mandibular Arch ◽  
Assessment Development ◽  
Permanent Molar ◽  
High Prevalence ◽  
Mandibular Second Molar ◽  
Meta Analyses

ABSTRACT Objectives To investigate the association between the management of mandibular arch perimeter during development of the dentition and its effects on second permanent molar (M2) eruption. Materials and Methods Seven electronic databases were searched without restrictions up to June 2020. Assessment was performed using the Risk Of Bias In Non-randomized Studies of Interventions (ROBINS-I) tool for non-randomized clinical trials (non-RCT). Odds ratio (OR) with 95% confidence intervals was calculated from random-effects meta-analyses. The Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) tool was used to assess the certainty of the evidence. Results Five non-RCTs, with serious to moderate risk of bias, were included. A low certainty of evidence indicated that individuals undergoing mandibular arch perimeter management by controlling the position of the first molar had a high prevalence of M2 eruption difficulties. The odds of eruption disorders was 7.5 times higher (OR: 7.57, [3.72, 15.41], P &lt; .001) in treated individuals. Subgroup analysis revealed that appliances that increased the arch perimeter lead to a greater chance of eruption disorders compared to appliances that only maintained the perimeter. The predictive factors for the M2 eruption difficulty were its previous mesioangulation in relation to the first molar (&gt;24°) and the treatment time (&gt;2 years). Conclusions Mandibular arch perimeter management during development of the dentition leads to an increase in the occurrence of M2 eruption difficulties. The identification of possible risk factors as well as the choice of the appropriate appliance type and the monitoring of these individuals seems to be essential to avoid undesirable effects with this therapy.

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