scholarly journals Incisor root length in individuals with and without anterior open bite: a comparative CBCT study

2020 ◽  
Vol 25 (4) ◽  
pp. 23e1-23e7
Author(s):  
Luis Ernesto Arriola-Guillén ◽  
Ivy Samantha Valera-Montoya ◽  
Yalil Augusto Rodríguez-Cárdenas ◽  
Gustavo Armando Ruíz-Mora ◽  
Aron Aliaga-Del Castillo ◽  
...  
Keyword(s):  
Root Length ◽  
Pearson Correlation ◽  
Root Apex ◽  
Open Bite ◽  
Lateral Incisor ◽  
Cone Beam ◽  
Anterior Open Bite ◽  
Mandibular Incisor ◽  
Perpendicular Line ◽  
Length Measurements

ABSTRACT Objective: This study aimed to compare the root length of maxillary and mandibular incisors between individuals with open bite versus matched individuals with adequate overbite. Methods: This comparative, matched and retrospective study included 48 cone beam computed tomographies (CBCTs) obtained at a university radiological center. Scans belonged to 24 individuals with open bite (overbite ≤ 0 mm) and 24 individuals with adequate overbite (controls). Both groups were matched by age, sex, malocclusion classification and skeletal characteristics (ANB and FMA angles). Root length of each maxillary and mandibular incisor was measured in millimeters (mm) in a sagittal section from a perpendicular line to the enamel cement junction until the root apex (384 length measurements were made). The means of root length in both groups were compared using t-tests. In addition, correlations between variables were evaluated with the Pearson correlation coefficient (α = 0.05). Results: In both groups, the root length of the upper central incisors was approximately 12 mm and the root length of the maxillary lateral incisors was approximately 13 mm (p˃ 0.05). Likewise, the root length of lower central incisors in both groups measured approximately 12 mm (p˃ 0.05). However, the mandibular lateral incisor roots of open bite patients were significantly longer than in the normal overbite patients (approximately 1 mm, p= 0.012 right side, p= 0.001 left side). Conclusions: Root length of maxillary incisors and central mandibular incisor is similar in individuals with or without open bite, but the mandibular lateral incisor roots in open bite patients were significantly longer than in the normal overbite patients.

scholarly journals A 3-D evaluation of transverse dentoalveolar changes and maxillary first molar root length after rapid or slow maxillary expansion in children

2019 ◽  
Vol 24 (3) ◽  
pp. 79-87 ◽  
Author(s):  
Helder Baldi Jacob ◽  
Gerson Luiz Ulema Ribeiro ◽  
Jeryl D. English ◽  
Juliana da Silva Pereira ◽  
Mauricio Brunetto
Keyword(s):  
Root Length ◽  
Root Formation ◽  
Tooth Movement ◽  
Root Resorption ◽  
Root Apex ◽  
Cone Beam ◽  
Maxillary Expansion ◽  
Bone Thickness ◽  
Significant Difference ◽  
Bone Changes

ABSTRACT Objective: The objective of the present study was to conduct a randomized clinical trial comparing the effects of rapid maxillary expansion (RME) and slow maxillary expansion (SME). Maxillary permanent first molar root length and tooth movement through the alveolus were studied using cone-beam computed tomography (CBCT). Methods: Subjects with maxillary transverse deficiencies between 7 and 10 years of age were included. Using Haas-type expanders, children were randomly assigned to two groups: RME (19 subjects, mean age of 8.60 years) and SME (13 subjects, mean age of 8.70 years). Results: Buccal cortical, buccal bone thicknesses and dentoalveolar width decreased in both groups. In the RME group the greatest decrease was related to distal bone thickness (1.26 mm), followed by mesial bone thickness (1.09 mm), alveolar width (0.57 mm), and the buccal cortical (0.19 mm). In the SME group the mesial bone thickness decreased the most (0.87 mm) and the buccal cortical decreased the least (0.22 mm). The lingual bone thickness increased in the RME and SME groups (0.56 mm and 0.42 mm, respectively). The mesial root significantly increased in the RME group (0.52 mm) and in the SME group (0.40 mm), possibly due to incomplete root apex formation at T1 (prior to installation of expanders). Conclusions: Maxillary expansion (RME and SME) does not interrupt root formation neither shows first molar apical root resorption in juvenile patients. Although slightly larger in the RME group than SME group, both activation protocols showed similar buccal bone thickness and lingual bone thickness changes, without significant difference; and RME presented similar buccal cortical bone changes to SME.

scholarly journals Root surface areas of maxillary permanent teeth in anterior normal overbite and anterior open bite assessed using cone-beam computed tomography

2017 ◽  
Vol 47 (4) ◽  
pp. 241 ◽  
Author(s):  
Piyadanai Suteerapongpun ◽  
Supassara Sirabanchongkran ◽  
Tanapan Wattanachai ◽  
Patiyut Sriwilas ◽  
Dhirawat Jotikasthira
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Surface ◽  
Open Bite ◽  
Cone Beam ◽  
Permanent Teeth ◽  
Anterior Open Bite ◽  
Surface Areas

scholarly journals Corticotomy for Correction of Skeletal Anterior Open Bite Using Miniplates as Skeletal Anchorage (A Clinical and Cone Beam Comparative Study)

2017 ◽  
Vol 4 (4) ◽  
pp. 427-437
Author(s):  
Maha Mohamed ◽  
Ahmed Salama ◽  
Tarek Marei ◽  
Hatem Alahmady ◽  
Farouk Hussain
Keyword(s):  
Comparative Study ◽  
Open Bite ◽  
Cone Beam ◽  
Skeletal Anchorage ◽  
Anterior Open Bite

scholarly journals Skeletal morphologic features of Anterior Open Bite Malocclusionamongst black patients visiting the Medunsa oral health centre

2020 ◽  
Vol 75 (8) ◽  
pp. 425-431
Author(s):  
Ntokozo P Sithole ◽  
Mohamed I Khan ◽  
Mosimane PS Sethusa
Keyword(s):  
Black People ◽  
Pearson Correlation ◽  
Health Centre ◽  
Open Bite ◽  
Wilcoxon Test ◽  
Class I ◽  
Control Group ◽  
Class Iii ◽  
Anterior Open Bite ◽  
Anterior Teeth

INTRODUCTION: Anterior open bite (AOB) malocclusion presents as lack of vertical overlap of anterior teeth. It is viewed to be unaesthetic and may affect speech and mastication It develops due to the interaction of hereditary and environmental etiological factors and these usually affect the vertical growth of the face. This study describes the vertical changes of South African black people presenting with AOB. AIMS AND OBJECTIVES: The aim was to determine skeletal morphological features of patients with AOB malocclusion. DESIGN: The design was a retrospective, cross-sectional study. MATERIALS: Archived pre-treatment lateral cephalographs of 181 patients who consulted between 2007 and 2014 were divided into four groups: control group of 62 patients with skeletal Class I pattern without AOB; test groups of patients with AOB (119) divided into 35 Class I, 43 Class II, and 41 Class III malocclusions. Records of each group were divided according to gender. Descriptive statistics, the Pearson correlation coefficient, t-test and. Wilcoxon test were employed to analyze the data, and p values of <0.05 were considered statistically significant. RESULTS AND CONCLUSIONS: Patients with AOB had a larger vertical facial pattern in all classes of malocclusion. Males presented with larger Sn-GoGn angles than females. The PFH/AFH ratio was lower across all classes of malocclusion compared to the control group.

scholarly journals Anterior open bite correction with hybrid FLOWJAC® system devices, patient with previous Chin bone resorption. Case report.

2019 ◽  
Vol 26 (2) ◽  
pp. 38-44
Author(s):  
Santiago Herrera-Guardiola
Keyword(s):  
Bone Resorption ◽  
Present Report ◽  
Root Apex ◽  
Open Bite ◽  
Anterior Open Bite ◽  
Adequate Treatment ◽  
Lower Lip ◽  
Precise Diagnosis ◽  
Chin Augmentation ◽  
Lower Arch

The orthodontic minitubes system (FLOWJAC ® System, Bogotá, Colombia) is an innovating system that blend the selfligating philosophy techniques and a lowprofile appliance. The FLOWJAC® System works with low orthodontic forces, same as selfligation devices. The system uses heat-treated wires with better physical properties such as hysteresis when is compare with traditional wires. However, the FLOWJAC® technique doesn´t use a wire sequence to get a “working wire”, just a 0,014 Copper NiTi. The clinician in each appointment must modify the minitube location to the clinical desire teeth position. The present report blend FLOWJAC® devices in the upper arch and clear selfligation in the lower arch. The patient treated has mandibular bone resorption due a alloplastic chin augmentation. The root apex from first right premolar to the first left premolar seen to be near to the resorption area using Cone Beam Computer Tomography. That´s the reason why we use a pre-adjust devices in the lower arch, to avoid pulpar and periodontal counter effects. This case was finished with proper functional and aesthetics objectives; such as molar and canine class I, anterior open bite closure with 20% of overbite, coincidence of dental smile arch with lower lip, and without root and pulpar counter effects. The porpoise of this report is to present an orthodontic case with bone resorption on right premolar and incisors area of the mandible. The case was treated with selfligation orthodontics system; FLOWJAC® System in the upper arch and Empower Clear® (American Orthodontics Shebboyiang, USA) in the lower arch and could be done with a precise diagnosis and adequate treatment planning.

scholarly journals Dimensional changes of dental arches produced by fixed and removable palatal cribs: A prospective, randomized, controlled study

2016 ◽  
Vol 87 (2) ◽  
pp. 215-222 ◽  
Author(s):  
Thiago Slaviero ◽  
Thais Maria Freire Fernandes ◽  
Paula Vanessa Pedron Oltramari-Navarro ◽  
Ana Claudia de Castro ◽  
Ferreira Conti ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Open Bite ◽  
Mixed Dentition ◽  
Controlled Study ◽  
3D Scanner ◽  
Anterior Open Bite ◽  
Treatment Protocols ◽  
Mandibular Incisor ◽  
Dimensional Changes ◽  
3D Software

ABSTRACT Objective: To evaluate the dimensional changes of dental arches on digital models of open bite treatment with fixed and removable palatal cribs. Materials and Methods: The sample comprised 41 patients of both sexes who were white, aged 7–10 years, and who had mixed dentition, Angle Class I molar relationship, and a negative overbite of at least 1 mm. The sample was randomly divided into two groups: G1, fixed palatal crib; and G2, removable palatal crib. Cast models, obtained initially (T1) and after 1 year of treatment (T2), were scanned by a three-dimensional (3D) scanner, 3Shape R700, producing a 3D image. Measurements were performed by a calibrated examiner using OrthoAnalyzer™ 3D software. Results: At T2–T1, differences were observed between the groups regarding vertical dentoalveolar development and overjet. There was more mandibular incisor extrusion for G1 (−1.66 mm) than for G2 (−0.54 mm). An overjet increase was observed in G1 (0.56 mm), in contrast to a reduction in G2 (−0.40 mm). There was a similar overbite increase for both groups (3.51 mm for fixed palatal crib and 3.88 mm for removable palatal crib). Conclusions: Both the treatment protocols are similarly effective for anterior open bite correction, providing an overbite increase with dentoalveolar arch changes, especially in the anterior region.

scholarly journals Evaluation of miniscrew-supported rapid maxillary expansion in adolescents: A prospective randomized clinical trial

2018 ◽  
Vol 88 (6) ◽  
pp. 702-709 ◽  
Author(s):  
Tugce Celenk-Koca ◽  
Aslihan Ertan Erdinc ◽  
Serpil Hazar ◽  
Lacey Harris ◽  
Jeryl D. English ◽  
...  
Keyword(s):  
Root Length ◽  
Cone Beam ◽  
Maxillary Expansion ◽  
Bone Thickness ◽  
Prospective Randomized Clinical Trial ◽  
Adolescent Population ◽  
Skeletal Changes ◽  
Computed Tomography Images ◽  
Length Measurements ◽  
Tooth Inclination

ABSTRACT Objectives: To evaluate and compare the dental and skeletal changes with conventional and miniscrew-supported maxillary expansion appliances in adolescents. Materials and Methods: Forty patients were divided into two groups, with one group receiving a tooth-borne expander and the other group receiving an expander supported by four miniscrews (bone-borne). Multiplanar coronal and axial slices obtained from cone-beam computed tomography images were used to measure the changes in transverse skeletal widths, buccal bone thickness, tooth inclination, and root length. Paired t-tests and independent-sample t-tests were used to compare the two expansion methods. Results: Bone-borne expansion increased the maxillary suture opening more than 2.5 times than tooth-borne expansion both anteriorly and posteriorly. Between the maxillary first premolars, sutural expansion accounted for 28% and 70% of the total transverse width increase in the tooth-borne and bone-borne expander groups, respectively. Similarly, 26% and 68% of the total expansion was of skeletal nature in the tooth-borne and bone-borne expander groups between the maxillary first molars. The pattern of expansion was variable, with most of the patients in both groups demonstrating a triangular-shaped sutural opening that was wider anteriorly. Subjects in the conventional group experienced significantly more buccal bone reduction and greater buccal inclination of the teeth. No significant differences were observed for root length measurements between the two groups. Conclusion: Use of bone-borne expansion in the adolescent population increased the extent of skeletal changes in the range of 1.5 to 2.8 times that of tooth-borne expansion and did not result in any dental side effects.

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