scholarly journals An Evaluation of Buccal Shield Treatment

2007 ◽  
Vol 77 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Kambiz Moin ◽  
Samir E. Bishara
Keyword(s):  
Treatment Time ◽  
Statistical Tests ◽  
Normal Growth ◽  
Mixed Dentition ◽  
Dental Arch ◽  
Arch Width ◽  
Bodily Movement ◽  
Age Related ◽  
Significant Difference ◽  
Width Measurements

Abstract Objective: To evaluate the short-term effects of the buccal shield modification of the lip-bumper design and on various mandibular dental arch parameters and to determine whether the changes in arch widths are due to the tipping or bodily movements of the teeth involved. Materials and Methods: This study included 45 consecutively treated patients (29 girls and 16 boys) from a private orthodontic practice. Student's and paired t-tests were used to test the null hypothesis of no change over time for the various measurements. Linear regression analyses were used to determine whether treatment time was a significant predictor of arch width expansion. Significance for all statistical tests was predetermined at P ≤ .05. Results: Student's t-test results indicated the presence of a significant (P < .0001) increase in all the arch parameters measured. The greatest mean expansion was observed at the first (5.0 ± 2.2 mm) and second (3.4 ± 2.2 mm) premolar width measurements. The changes in arch width parameters were significantly (P < .0001) greater than the normal age-related changes in the corresponding parameters. There was no significant difference between arch width expansion of the occlusal vs gingival levels, indicating a bodily and not tipping movement. Only 30% of the lower incisors demonstrated an increase in their proclination beyond normal values. Conclusion: When using the buccal shield appliance, the mandibular arch width parameters can be expanded in the mixed dentition with bodily movement of teeth. The expanded arch width dimensions are greater than what would be expected as a result of normal growth.

scholarly journals Facial profile and maxillary arch dimensions in unilateral cleft lip and palate children in the mixed dentition stage

2017 ◽  
Vol 11 (01) ◽  
pp. 076-082 ◽  
Author(s):  
Vellore Kannan Gopinath ◽  
Ab Rani Samsudin ◽  
Siti Noor Fazliah Mohd Noor ◽  
Hady Youssef Mohamed Sharab
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Cranial Base ◽  
Mixed Dentition ◽  
Dental Arch ◽  
Base Length ◽  
Facial Profile ◽  
Arch Width ◽  
Significant Difference ◽  
Maxillary Arch

ABSTRACT Objectives: The aim of this study was to evaluate the vertical and sagittal facial profile and maxillary arch width, depth, and length of patients with unilateral cleft lip and palate (UCLP) and to compare them with healthy noncleft children in the mixed dentition stage (7–13 years). Materials and Methods: This study is conducted at Hospital Universiti Sains Malaysia. UCLP group comprised 48 patients with nonsyndromic UCLP who have had the lip and palate repaired, whereas the control group comprised 48 healthy noncleft cases. The lateral cephalometrics measurements were used to determine the vertical height, sagittal depth of the face, and cranial base length and angle. Maxillary arch dimensions were measured on the study cast including arch width, depth, and length. Results: Vertical facial height and sagittal depth measurements showed a significant decrease (P < 0.05) in the mean growth pattern in UCLP group. The anterior cranial base length (S-N) was shorter in UCLP children (P < 0.001), while Ba-N length had no significant difference (P = 0.639). Nasion-Sella Tursica-Basion angle was significantly higher in the UCLP group (P = 0.016). Dental arch width with reference to canine-to-canine and first premolar-to- first premolar distance was significantly larger in control (P = 0.001). Conclusion: Mean vertical and sagittal facial dimensions in the UCLP children who do not undergo orthodontic treatment are significantly lesser in all directions of growth than healthy noncleft children. The maxillary dental arch had a normal depth but constricted in width and arch length.

Shape and Size of Dental Arch

2006 ◽  
Vol 45 (02) ◽  
pp. 191-194 ◽  
Author(s):  
E. Tauferová ◽  
Z. Teuberová ◽  
M. Seydlová ◽  
V. Smutný ◽  
J. Racek ◽  
...  
Keyword(s):  
Reference Points ◽  
Dental Arch ◽  
Special Device ◽  
Initial Examination ◽  
Arch Width ◽  
Optical Head ◽  
Significant Difference ◽  
Before And After ◽  
Dental Arch Width ◽  
Calibrated Images

Summary Objectives: The diagnostic procedure commences with the initial examination, during which a number of individual findings of the occlusion or malocclusion are clarified [1]. The objective is to describe the morphological and functional characteristics on each patient using specific guidelines, and then to provide a prognosis of the therapy. Upper and lower arch compression in first premolars and molars area was visible before treatment. Methods: A special device (Czech technical university research prototype) was prepared for this purpose. The optical head contains a digital color camera. The front of the optical head consists of a removable prism which is put into the mouth. The findings can display live images from the camera, which can be archived on a PC. The device captured and geometrically calibrated images permitting comparison of several different dental casts. Results: In the first part of this study 792 sets of study plaster casts were screened. Measurements of dental arch width between reference points of canines, first premolars and first molars were made: upper jaw: men: 3-3 – 35.1 mm (SE 0.13); 4-4 – 37.5 mm (SE 0.13); 6-6 – 48.1 mm (SE 0.19); women: 3-3 – 33.4 mm (SE 0.13); 4-4 – 35.6 mm (SE 0.15); 6-6 – 46.7 mm (SE 0.19). The second part concerns the group of 36 patients which is different from the 792 controls. There were studied changes between initial, post-treatment and post-retention alignment of upper and lower dental arch. Conclusions: Geometrically calibrated images help compare several different steps of the treatment and show a significant difference between patients before and after treatment.

scholarly journals Impact of Orthodontic Brackets on the Intraoral Scan Data Accuracy

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Ji-Man Park ◽  
Shin-Ae Choi ◽  
Ji-Yun Myung ◽  
Youn-Sic Chun ◽  
Minji Kim
Keyword(s):  
Dental Arch ◽  
Maximum Deviation ◽  
Arch Width ◽  
Dental Models ◽  
Digital Measurements ◽  
Standard Values ◽  
Width Measurements ◽  
Scan Data ◽  
Lingual Brackets ◽  
The Impact

This study aims to compare the impact of buccal and lingual brackets on the accuracy of dental arch data acquired by 4 different digital intraoral scanners. Two pairs of dental casts, one with buccal brackets and the other with lingual brackets, were used. Digital measurements of the 3D images were compared to the actual measurements of the dental models, which were considered standard values. The horizontal measurements included intercanine widths and intermolar widths. The Mann–WhitneyUtest was performed for comparisons. iTero® and Trios® both showed high accuracy with relatively small maximum deviation of measurements. iTero showed a significantly higher accuracy in most of the arch width measurements on the buccal bracket model than on the lingual model (P<0.05). Zfx IntraScan® and E4D Dentist® produced maximum deviations of more than 2 mm from both the buccal and the lingual bracket models. After comparing the degree of distortion of the arch on the digital scans with actual measurements of the same models, iTero and Trios proved to be excellent in terms of trueness and precision. Nevertheless, digital intraoral scanners should be used more cautiously in arches with lingual brackets than in those with buccal brackets.

scholarly journals Levels of gingival crevicular fluid matrix metalloproteinases in periodontally compromised teeth under orthodontic forces

2015 ◽  
Vol 85 (6) ◽  
pp. 1009-1014 ◽  
Author(s):  
Rhita C. Almeida ◽  
Jonas Capelli ◽  
Ricardo P. Teles
Keyword(s):  
Matrix Metalloproteinases ◽  
Orthodontic Treatment ◽  
Gingival Crevicular Fluid ◽  
Statistical Tests ◽  
Dental Arch ◽  
Orthodontic Movement ◽  
Significant Difference ◽  
Movement Group ◽  
Crevicular Fluid ◽  
Orthodontic Forces

ABSTRACT Objective:  To examine levels of matrix metalloproteinases (MMPs)-1, -2, -3, -7, -8, -12, and -13 in the gingival crevicular fluid (GCF) of periodontally compromised teeth at different time points during orthodontic movement. Materials and Methods:  Ten controlled periodontitis subjects were submitted to orthodontic treatment. One dental arch was subjected to orthodontic movement, and teeth in the opposite arch were used as controls. GCF samples were collected from the lingual sites of two movement and two control incisors 1 week before orthodontic activation (−7 d), immediately after orthodontic activation, and after 1 hour, 24 hours, and 7, 14, and 21 days. Multiplexed bead immunoassay was used to measure MMPs in GCF. Data were analyzed using Friedman and Wilcoxon statistical tests. Results:  The only significant change found over time was in the levels of MMP-1 in the movement group (P &lt; .05). When the two groups were compared after activation, the only statistically significant difference found was in levels of MMP-12 24 hours after activation (P &lt; .05). Conclusions:  Our findings suggested that the orthodontic movement of periodontally compromised teeth without active pockets did not result in significant changes in the GCF levels of MMPs.

scholarly journals Maxillary arch width and buccal corridor changes with Damon and conventional brackets: A retrospective analysis

2015 ◽  
Vol 86 (4) ◽  
pp. 655-660 ◽  
Author(s):  
Corey Shook ◽  
Sohyon (Michelle) Kim ◽  
John Burnheimer
Keyword(s):  
Inverse Correlation ◽  
Area Measurement ◽  
Strong Correlations ◽  
Arch Width ◽  
Significant Difference ◽  
Conventional Brackets ◽  
Width Measurements ◽  
Conventional Bracket ◽  
Buccal Corridor ◽  
Maxillary Arch

ABSTRACT Objective:  To evaluate the effect of Damon self-ligating and conventional bracket systems on buccal corridor widths and areas. Materials and Methods:  A retrospective sample of consecutively treated patients using either conventional (CG, n  =  45) or Damon self-ligating (SL, n  =  39) brackets was analyzed to determine any differences in buccal corridor widths and areas both within and between groups. Pretreatment and posttreatment frontal photographs were transferred to Photoshop CC, standardized using intercanthal width, and linear and area measurements were performed with tools in Photoshop CC. Ratios were then calculated for statistical analysis. Relationships between arch widths and buccal corridors were also examined. Results:  There were no significant differences in the posttreatment intercanine or intermolar widths either within or between the CG and SL groups. There were no significant differences in any buccal corridor width or area measurement either within or between the CG and SL groups. There were strong correlations with the intercanine width and the corresponding buccal corridor smile width measurements. There was an inverse correlation with the buccal corridor area in relation to the canine and the total smile width. Conclusions:  It is likely that posttreatment increases in arch width can be seen in patients treated with either a conventional bracket system or the Damon system. It is highly unlikely that there is any significant difference in buccal corridor width or area in patients treated with the Damon self-ligating system or a conventional bracket system.

Resorbable Versus Titanium Rigid Fixation for Pediatric Mandibular Fractures: A Systematic Review, Institutional Experience and Comparative Analysis

2021 ◽  
pp. 194338752110225
Author(s):  
Matthew E. Pontell ◽  
Eva B. Niklinska ◽  
Stephane A. Braun ◽  
Nolan Jaeger ◽  
Kevin J. Kelly ◽  
...  
Keyword(s):  
Mixed Dentition ◽  
Surgical Removal ◽  
Mandibular Fractures ◽  
Rigid Fixation ◽  
Complication Rates ◽  
Facial Growth ◽  
Age Related ◽  
Significant Difference ◽  
Mandible Fractures ◽  
Unerupted Teeth

Study Design: Pediatric mandible fractures mandate special consideration because of unerupted teeth, mixed dentition, facial growth and the inability to tolerate maxillomandibular fixation. No consensus exists as to whether resorbable or titanium plating systems are superior with regards to clinical outcomes. Objective: This study aims to systematically review and compare the outcomes of both material types in the treatment of pediatric mandible fractures. Methods: After PROSPERO registration, studies from 1990-2020 publishing on outcomes of ORIF of pediatric mandible fractures were systematically reviewed according to PRISMA guidelines. An additional retrospective review was conducted at a pediatric level 1 trauma center. Results: 1,144 patients met inclusion criteria (30.5% resorbable vs. 69.5% titanium). Total complication rate was 13%, and 10% required a second, unplanned operation. Complication rates in the titanium and resorbable groups were not significantly different (14% vs. 10%; P = 0.07), and titanium hardware was more frequently removed on an elective basis (P < 0.001). Condylar/sub-condylar fractures were more often treated with resorbable hardware (P = 0.01); whereas angle fractures were more often treated with titanium hardware (P < 0.001). Within both cohorts, fracture type did not increase the risk of complications, and comparison between groups by anatomic level did not demonstrate any significant difference in complications. Conclusions: Pediatric mandible fractures requiring ORIF are rare, and hardware-specific outcomes data is scarce. This study suggests that titanium and resorbable plating systems are equally safe, but titanium hardware often requires surgical removal. Surgical approach should be tailored by fracture anatomy, age-related concerns and surgeon preference.

Two-phase orthodontic treatment of two different types of tooth transposition in the same patient

2021 ◽  
pp. 146531252110157
Author(s):  
Marcelo Soares Correa ◽  
Flávia N Ellinger Correa ◽  
Karina Maria Salvatore de Freitas ◽  
Marcos Roberto de Freitas ◽  
Daniela Gamba Garib ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Time ◽  
Treatment Phase ◽  
Mixed Dentition ◽  
Lateral Incisor ◽  
Dental Arch ◽  
Two Phase ◽  
Main Complaint ◽  
One Year

Orthodontic treatment is thoroughly planned considering the patient’s facial and dental characteristics, the main complaint, treatment time and the orthodontist’s experience. Transposition is a form of ectopia, in which two adjacent teeth exchange positions in the dental arch. Transposition can be partial or complete. This article reports the treatment of a female patient with two kinds of tooth transposition managed in the mixed and permanent dentitions. A girl, aged eight years and three months, came to routine paediatric consultation with an ectopic permanent mandibular left lateral incisor in the mixed dentition. Radiographic analysis indicated partial transposition of the permanent mandibular left lateral incisor and canine (Md.L2.C), and development of a complete tooth transposition between the permanent maxillary right first pre-molar and canine (Mx.C.P1). The patient was treated in two phases. The first, in the mixed dentition, and the second, in the permanent dentition with a three-year follow-up between them. These challenging treatment approaches are described in detail, including the mechanics used. The key points of this treatment were early diagnosis of the ectopic mandibular lateral incisor, use of light forces and interphase patient follow-up. These determined the best time to start the second treatment phase, enabling achievement of aesthetic and functional outcomes, and the results remained stable one year after the end of orthodontic treatment.

Prediction of dental arch width increase in the early mixed dentition using craniofacial parameters

2018 ◽  
Vol 67 (6) ◽  
Author(s):  
Faezeh Ghaderi ◽  
Shahla Momeni Danaei ◽  
Yasamin Rajaei ◽  
Azade Rafiee
Keyword(s):  
Mixed Dentition ◽  
Dental Arch ◽  
Arch Width ◽  
Dental Arch Width

scholarly journals A dissertation on tooth size and arch dimension in uncrowded versus crowded Class I malocclusion

2013 ◽  
Vol 2 (1) ◽  
pp. 1-6
Author(s):  
H Jahan ◽  
MZ Hossain
Keyword(s):  
Study Groups ◽  
Class I ◽  
Dental Arch ◽  
Tooth Size ◽  
Arch Width ◽  
Transverse Arch ◽  
Significant Difference ◽  
Dental Arch Length ◽  
Dental Crowding ◽  
Dental Casts

Aim: The purpose of this investigation was to examine the extent to which arch dimension or tooth size contributes to dental crowding. Materials and Methods: Two groups of dental casts were selected. Each group consisted of 30 pairs of dental casts including equal male and female samples. The first group had Class I malocclusion without crowding. The second group exhibited Class I malocclusion with dental crowding (more than 5 mm space deficiency). The following parameters were measured and used to compare the two groups: individual and collective mesiodistal widths of tooth, dental arch length, as well as buccal and lingual dental arch widths in the canine and molar regions. Results: Statistically significant differences in both tooth widths and transverse arch dimensions (widths) were found between the crowded and the normal groups. The crowded group was found to have a significantly smaller maxillary arch width and larger tooth size when compared with the uncrowded or normal group. There were no significant differences in arch length in the two groups in either the maxilla or the mandible. In comparing the anterior and overall Bolton ratios no significant difference was detected between the crowded and normal groups. Conclusion: The results of this study suggest under under two study groups (Class I skeletal base of crowded and uncrowded group) tooth size has a greater role in developing dental crowding. DOI: http://dx.doi.org/10.3329/bjodfo.v2i1.15994 Ban J Orthod & Dentofac Orthop, October 2011; Vol-2, No.1, 1-6

Evaluation of the Effects of Cheiloplasty on Maxillary Arch in UCLP Infants Using Three-Dimensional Digital Models

2019 ◽  
Vol 56 (8) ◽  
pp. 1013-1019 ◽  
Author(s):  
Thanawut Kongprasert ◽  
Kengkart Winaikosol ◽  
Araya Pisek ◽  
Aggasit Manosudprasit ◽  
Amornrut Manosudprasit ◽  
...  
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
High Reliability ◽  
Anterior Part ◽  
Intraclass Correlation ◽  
Dental Arch ◽  
Posterior Arch ◽  
Anterior Arch ◽  
Arch Width ◽  
Significant Difference

Objective: To analyze and identify changes in the maxillary dental arch before and after cheiloplasty in a group of unilateral complete cleft lip and palate (UCLP) infants. Design: This is a cohort study. Material and Method: Study models from 16 infants with nonsyndromic UCLP, who were treated at Khon Kaen University, were taken before (T1) and after cheiloplasty (T2). The dental models underwent a process of scanning through a 3D scanner, from which 9 linear and 2 angular landmarks were evaluated. Paired t test was used to compare the measurement statistically between T1 and T2. Results: Alveolar cleft gap (G-L), anterior basal angle (∠GC-CC′), and anterior arch curvature angle on greater segment (∠GIC) were significantly decreased ( P < .05). Contrarily, anterior ridge length of greater segment (C-I), anterior ridge length of lesser segment (L-C′), and posterior arch width (T-T′) were significantly increased ( P < .05) after cheiloplasty. While, anterior portion of greater segment (I-G), anterior arch width (C-C′), anterior arch depth (I⊥CC′), arch length (G⊥TT′), and arch circumference (T-C-I-G-L-C′-T′) showed no significant difference. The measurements were tested using the Intraclass correlation coefficient. The coefficients indicated high reliability. Conclusion: Cleft gap significantly decreased after lip repair, and the anterior part of maxillary dental arch was also bent palatally after cheiloplasty without any other intervention except cheiloplasty. More studies are needed to assess the amount of lip pressure. If any convincing force is presented, an appliance to prevent undesirable pressure is indicated.

Sign in / Sign up

Export Citation Format

Share Document