Craniomaxillofacial Changes Using High-Pull J-Hook Headgear and Mini-Implant Anchorage in Adolescents: A Structural Superimposition Method

2021 ◽  
Vol 45 (6) ◽  
pp. 433-440
Author(s):  
Sunock Yun ◽  
Jae Hyun Park ◽  
Na-Young Chang ◽  
Hye Young Seo ◽  
Jae-Hyun Sung ◽  
...  
Keyword(s):  
Study Design ◽  
Cranial Base ◽  
Female Adolescents ◽  
Plane Angle ◽  
Mini Implants ◽  
Facial Height ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Implant Anchorage ◽  
Stable Structures

Objective: The aim of this study was to compare the craniomaxillofacial changes when using high-pull J-hook headgear (HPJH) and mini-implants (MIs) as maxillary anchorage in adolescents. Study Design: 40 female adolescents with dentoalvolar protrusion were divided into 2 groups; the HPJH group (n=20) and the MI group (n=20). Lateral cephalograms taken before treatment (T0) and after anterior tooth retraction (T1) were superimposed on the stable structures and then craniomaxillofacial changes were evaluated. Results: The cranial base angle, SNB, and facial angle decreased in the HPJH group but increased in the MI group. ANB decreased more in the MI group than in the HPJH group. Mandibular plane angle increased in the HPJH group but decreased in the MI group. Facial height index increased in the MI group while it showed no change in the HPJH group. Mandibular true rotation occurred clockwise in the HPJH group and counterclockwise in the MI group. Maxillary central incisors were intruded and retracted more in the MI group than in the HPJH group. Maxillary first molars were extruded in the HPJH group and were intruded in the MI group. Maxillary first molars were protracted more in the HPJH group than in the MI group. Mandibular central incisors were retracted more in the HPJH group than the MI group. Mandibular first molars were extruded more in the MI group than in the HPJH group. Conclusion: More favorable craniomaxillofacial changes occurred in the MI group than in the HPJH group.

scholarly journals The maxillary incisor display at rest: analysis of the underlying components

2018 ◽  
Vol 23 (6) ◽  
pp. 48-55 ◽  
Author(s):  
Waqar Jeelani ◽  
Mubassar Fida ◽  
Attiya Shaikh
Keyword(s):  
Soft Tissue ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Plane Angle ◽  
Upper Lip ◽  
Facial Height ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
The Relationship ◽  
Mandibular Plane Angle

ABSTRACT Introduction: Maxillary incisal display is one of the most important attributes of smile esthetics. Objective: The aim of this study was to determine the relationship between maxillary incisal display at rest (MIDR) and various soft tissue, hard tissue and dental components. Methods: A cross-sectional study was conducted on 150 subjects (75 males, 75 females) aged 18-30 years. The MIDR was recorded from the pretreatment orthodontic records. The following parameters were assessed on lateral cephalograms: ANB angle, mandibular plane angle, palatal plane angle, lower anterior and total anterior facial heights, upper incisor inclination, upper anterior dentoalveolar height, and upper lip length, thickness and protrusion. The relationship between MIDR and various skeletal, dental and soft tissue components was assessed using linear regression analyses. Results: The mean MIDR was significantly greater in females than males (p = 0.011). A significant positive correlation was found between MIDR and ANB angle, mandibular plane angle and lower anterior facial height. A significant negative correlation was found between MIDR and upper lip length and thickness. Linear regression analysis showed that upper lip length was the strongest predictor of MIDR, explaining 29.7% of variance in MIDR. A multiple linear regression model based on mandibular plane angle, lower anterior facial height, upper lip length and upper lip thickness explained about 63.4% of variance in MIDR. Conclusions: Incisal display at rest was generally greater in females than males. Multiple factors play a role in determining MIDR, nevertheless upper lip length was found to be the strongest predictor of variations in MIDR.

scholarly journals Sagittal and Vertical Growth of the Maxillo–Mandibular Complex in Untreated Children: A Longitudinal Study on Lateral Cephalograms Derived from Cone Beam Computed Tomography

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8484
Author(s):  
Leah Yi ◽  
Hyeran Helen Jeon ◽  
Chenshuang Li ◽  
Normand Boucher ◽  
Chun-Hsi Chung
Keyword(s):  
Computed Tomography ◽  
Longitudinal Study ◽  
Cone Beam Computed Tomography ◽  
3D Imaging ◽  
Cranial Base ◽  
Cone Beam ◽  
Plane Angle ◽  
Vertical Growth ◽  
Mandibular Plane ◽  
Lateral Cephalograms

The aim of this longitudinal study was to evaluate the sagittal and vertical growth of the maxillo–mandibular complex in untreated children using orthogonal lateral cephalograms compressed from cone beam computed tomography (CBCT). Two sets of scans, on 12 males (mean 8.75 years at T1, and 11.52 years at T2) and 18 females (mean 9.09 years at T1, and 10.80 years at T2), were analyzed using Dolphin 3D imaging. The displacements of the landmarks and rotations of both jaws relative to the cranial base were measured using the cranial base, and the maxillary and mandibular core lines. From T1 to T2, relative to the cranial base, the nasion, orbitale, A-point, and B-point moved anteriorly and inferiorly. The porion moved posteriorly and inferiorly. The ANB and mandibular plane angle decreased. All but one subject had forward rotation in reference to the cranial base. The maxillary and mandibular superimpositions showed no sagittal change on the A-point and B-point. The U6 and U1 erupted at 0.94 and 1.01 mm/year (males) and 0.82 and 0.95 mm/year (females), respectively. The L6 and L1 erupted at 0.66 and 0.88 mm/year (males), and at 0.41 mm/year for both the L6 and the L1 (females), respectively.

scholarly journals Cephalometric evaluation of changes in vertical dimension and molar position in adult non-extraction treatment with clear aligners and traditional fixed appliances

2021 ◽  
Vol 26 (4) ◽  
Author(s):  
Hailee RASK ◽  
Jeryl D. ENGLISH ◽  
Clark COLVILLE ◽  
Fred Kurtis KASPER ◽  
Ronald GALLERANO ◽  
...  
Keyword(s):  
Cranial Base ◽  
Vertical Dimension ◽  
Open Bite ◽  
Plane Angle ◽  
Fixed Appliance ◽  
Facial Height ◽  
Mandibular Plane ◽  
Fixed Appliances ◽  
Clear Aligner ◽  
Lower Molar

ABSTRACT Introduction: Orthodontists have been using clear aligners to treat malocclusions, and one potential effect of treatment with orthodontic aligners is the intrusion and/or resists extrusion of the posterior teeth. This “bite-block effect” is primarily anecdotal due to the frequent occurrence of posterior open bites in patients after clear aligner therapy. Objective: The purpose of this study was to compare changes promoted by clear aligners and traditional fixed appliances in cephalometric measurements of the vertical dimension and molar position in adult patients with Class I malocclusion treated with non-extraction. Methods: Pre- and post-treatment lateral cephalometric radiographs of adult patients treated with either clear aligners (n=44) or traditional fixed appliances (n=22) were selected for retrospective analysis. Eight interval measurements and one nominal measurement were evaluated: anterior overbite (OB), mandibular plane angle related to cranial base (SN_MP) and related to Frankfort (FMA), lower molar height (L6H) and upper molar height (U6H), palatal plane to mandibular plane angle (PP_MP), lower facial height (LFH), total facial height (TFH), and posterior open bite (Posterior_OB). A single evaluator traced all cephalographs, and changes in select measures of the vertical dimension were compared within and between groups. Results: OB decreased (1.15 mm) and L6H increased (0.63 mm) in the traditional fixed appliance group. Mandibular plane angles (related to cranial base and to Frankfort) increased (0.43° and 0.53°, respectively) in the clear aligner group, but just FMA showed significant difference between groups (difference of 0.53°). LFH and TFH increased (ranging from 0.52 mm to 0.80 mm) in both groups, with no differences between treatment modality. Presence of visible posterior open bite significantly increased over the course of treatment. OB, FMA and L6H exhibited an interaction between treatment stage (pre- and post-treatment) and modality (clear aligner therapy and traditional fixed appliances), but no interaction among these three variables was found. Conclusions: The evidence does not support the theory that clear aligner therapy produces better vertical dimension control than traditional fixed appliances. Traditional fixed appliance therapy slightly extruded the lower molar, and clear aligner therapy produced a slightly mandibular backward rotation.

scholarly journals A Comparison of Craniofacial Characteristics between Two Different Adult Populations with Class II Malocclusion—A Cross-Sectional Retrospective Study

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 438
Author(s):  
Arvind Sivakumar ◽  
Prasad Nalabothu ◽  
Huyen Nguyen Thanh ◽  
Gregory S. Antonarakis
Keyword(s):  
Growth Pattern ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
South Indian Population ◽  
The South ◽  
Facial Height ◽  
South Indian ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Craniofacial Characteristics

The dental, skeletal, and soft-tissue characteristics of a particular malocclusion can differ based on ethnicity, race, age, sex and geographical location with Class II malocclusion being one of the most prevalent malocclusions encountered in orthodontic clinical practice. The broad understanding of the characteristics of vertical skeletal and dental parameters in patients with Class II malocclusion can help clinicians to identify patterns and variations in the expression of this phenotype for better treatment outcomes. Hence, we compared the craniofacial characteristics of skeletal and dental Class II malocclusion traits from Indian and Vietnamese individuals to analyze the vertical skeletal and dental patterns in both population groups. The sample comprised of lateral cephalograms from 100 young adults with Class II malocclusion, of which fifty (25 males and 25 females) were from South India and the other 50 age- and sex-matched adults from Vietnam. The lateral cephalometric radiographs were digitized into anonymous image files and were traced and assessed for 16 vertical skeletal and dental parameters. The ANB angle was greater in males (+1.4 deg; p < 0.001) and females (+1.9 deg; p < 0.001) in the South Indian population. The Vietnamese males had a larger mandibular plane angle, articular angle, anterior facial height and lower anterior facial height compared to the Indian males. The Vietnamese females had larger mandibular plane and articular angles compared to the Indian females. The skeletal class II malocclusion was more severe in the South Indian compared to the Vietnamese adults. The Vietnamese sample showed a generalized tendency towards a more vertical skeletal growth pattern and in males this pattern seemed to be due to the dentoalveolar component. The Vietnamese females showed a tendency towards a vertical growth pattern, but without apparent contribution by the dentoalveolar component.

Dental and skeletal effects after total arch distalization using modified C-palatal plate on hypo- and hyperdivergent Class II malocclusions in adolescents

2020 ◽  
Author(s):  
Chang Yoon Jung ◽  
Jae Hyun Park ◽  
Ja Hyeong Ku ◽  
Nam-Ki Lee ◽  
Yoonji Kim ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Study Group ◽  
Class Ii Malocclusion ◽  
Plane Angle ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Palatal Plate ◽  
Skeletal Effects ◽  
Facial Types

ABSTRACT Objectives To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. Materials and Methods The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. Results The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P &lt; .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P &lt; .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. Conclusions The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.

scholarly journals Dental-skeletal dimensions in growing individuals with variations in the lower facial height

2004 ◽  
Vol 15 (1) ◽  
pp. 68-74 ◽  
Author(s):  
Carla Enoki ◽  
Carlos de Souza Telles ◽  
Mírian Aiko Nakane Matsumoto
Keyword(s):  
Class I ◽  
Plane Angle ◽  
Linear Measurements ◽  
Positive Correlation ◽  
Face Height ◽  
Facial Height ◽  
Mandibular Plane ◽  
Skeletal Pattern ◽  
Angular Measurements ◽  
Facial Proportions

The dental and skeletal dimensions of individuals with Class I skeletal pattern in puberty were compared. Eighty patients with Class I malocclusion were selected, independent of the vertical relations (overbite) of the incisors. The sample was divided into 3 groups: normal, short and excessive lower anterior face height, based on facial proportions. The dental and skeletal measurements of the 3 groups were compared among themselves. In the angular measurements, the results showed no correlation in the mandibular plane angle. In the linear measurements, the mandibular length was significantly greater in the group of patients with short lower anterior face height, with a positive correlation among the three groups. The dentoalveolar heights of the incisors had a positive correlation among the three groups in relation to the lower anterior face height, showing that they are responsible for its variation.

scholarly journals Effects of Two-Phase Treatment with the Herbst and Preadjusted Edgewise Appliances on the Upper Airway Dimensions

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Woei Li Koay ◽  
Yanqi Yang ◽  
Christine Shuk Kwan Tse ◽  
Min Gu
Keyword(s):  
Negative Correlation ◽  
Upper Airway ◽  
Second Phase ◽  
Plane Angle ◽  
Herbst Appliance ◽  
Two Phase ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Airway Dimensions ◽  
Mandibular Plane Angle

Aims. To assess the effects of two-phase treatment with the Herbst and the preadjusted edgewise appliances on upper airway dimensions and to investigate the correlation between changes in the upper airway dimensions and skeletal morphologies.Methods. A total of 27 Chinese male adolescents aged12.8±1.3years were selected. Lateral cephalograms were collected to assess the skeletal morphology and upper airway dimensions.Results. Following Herbst appliance treatment, the upper airway space was significantly enlarged, with the retropalatal (U-MPW) increasing by1.1±1.6 mm (P<0.001), the retroglossal (PASmin) increasing by1.3±2.9 mm (P<0.05), and the hypopharynx (V-LPW) enlarging by1.6±3.0 mm (P<0.01). PASmin was found to show a negative correlation to the mandibular plane angle (MnPl-SN) byr=-0.413(P<0.05). There was no significant change (P>0.05) in upper airway dimensions during the second-phase treatment.Conclusions. Herbst appliance treatment increased the oropharyngeal and hypopharyngeal airway dimensions among adolescents with Class II malocclusion, and the effects were maintained throughout the second treatment phase with a preadjusted edgewise appliance. There was a negative correlation between the change in the depth of the retroglossal pharynx and the mandibular plane angle.

scholarly journals The difference between Begg and Straightwire appliances on molar position, occlusal plane angle, and anterior and posterior facial height changes

2020 ◽  
Vol 53 (4) ◽  
pp. 223
Author(s):  
Dewi Sartika Santoso ◽  
C. Christnawati ◽  
Cendrawasih Andusyana Farmasyanti
Keyword(s):  
Orthodontic Treatment ◽  
Good Condition ◽  
Class I ◽  
Permanent Teeth ◽  
Occlusal Plane ◽  
Plane Angle ◽  
Anterior Teeth ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
The Difference

Background: Bimaxillary and bidental protrusion Class I Angle malocclusions have a characteristic convex facial profile and protrusion lips due to the labial inclination of the anterior teeth. Extraction of the first four premolars is the most common choice for orthodontic treatment of these cases when all the permanent teeth are complete and in good condition. Orthodontic treatment can be performed using the Begg or Straightwire techniques. Purpose: This study aims to investigate the difference in the effect of orthodontic treatment with Begg and Straightwire appliances on molar position, occlusal plane, and anterior and posterior facial height. Methods: Sixty pairs of lateral cephalograms before and after the treatment of patients with bimaxillary and bidental protrusive Angle malocclusion Class I, aged 18–35 years old, who underwent orthodontic treatment using the Begg and Straightwire techniques with the extraction of all first premolars that met the inclusion criteria. Data analysis was performed using two-way repeated analysis of variance (p<0.05) and Pearson correlation (p<0.05). Results: Molar position, occlusal plane angle, and anterior and posterior facial heights increased significantly after the Begg technique treatment and decreased significantly after the Straightwire technique treatment (p<0.05), but there were no significant differences between the four variables in the two techniques (p>0.05). Medium correlation was found between variables in both the Begg and Straightwire techniques. Conclusion: Molars were extruded and mesialized and the occlusal plane angle and height of the anterior and posterior faces increased after the Begg appliances treatment. The molars moved mesially and occlusally and there was a decrease in the occlusal plane angle, as well as the height of the anterior and posterior faces, after treatment with the Straightwire appliances. However, there was no difference between the two techniques.

scholarly journals Do orthopedic corrections of growing retrognathic hyperdivergent patients produce stable results?

2019 ◽  
Vol 89 (4) ◽  
pp. 552-558 ◽  
Author(s):  
Alec J. Rice ◽  
Roberto Carrillo ◽  
Phillip M. Campbell ◽  
Reginald W. Taylor ◽  
Peter H. Buschang
Keyword(s):  
Post Treatment ◽  
Maxillary Incisor ◽  
Relative Reduction ◽  
Plane Angle ◽  
Miniscrew Implants ◽  
Vertical Control ◽  
Orthodontic Therapy ◽  
Facial Height ◽  
Mandibular Plane ◽  
Maxillary Incisors

ABSTRACT Objectives: To determine if posterior dental intrusion produces stable orthodontic and orthopedic corrections in growing retrognathic hyperdivergent patients. Materials and Methods: The sample included 14 subjects (five males and nine females), who were 13.4 ± 0.7 years pretreatment, treated for 3.5 years, and followed for 3.6 years posttreatment. During the initial orthopedic phase, 150 g NiTi coil springs were attached to two palatal miniscrew implants (MSIs) for maxillary intrusion; two buccal mandibular MSIs were used for posterior vertical control. Full orthodontic therapy was initiated to correct the malocclusions during the orthodontic phase. Patients were recalled a minimum of 1 year posttreatment (mean 3.6 ±1.6 years). Patients were compared to matched untreated controls. Results: Relative to the untreated controls, during treatment and retention, maxillary and mandibular molars underwent 2.8 mm and 3.7 mm of relative posterior intrusion, respectively. Maxillary incisors were extruded 1.3 mm and the mandibular incisors underwent 2.9 mm of relative intrusion. Overall orthopedic changes included a reduction in the mandibular plane angle (MPA; 3.3°), an increase in SN-Pg (2.4°), an increase in S-N-B (2.1°), and a 4.3 mm relative reduction in anterior facial height. The maxillary incisors, which showed 0.6 mm of intrusion (relative to controls), was the only dental or skeletal measure to show a statistically significant between-group posttreatment difference. Conclusions: Except for maxillary incisor position, the substantial dental intrusion and associated orthopedic corrections that were produced during treatment remained stable post-treatment.

scholarly journals Over-bite and Vertical Changes following First Premolar Extraction in High Angle Cases

2012 ◽  
Vol 13 (6) ◽  
pp. 812-818 ◽  
Author(s):  
KS Girish ◽  
GC Ramesh ◽  
MC Pradeep ◽  
G Arun Kumar ◽  
BS Suresh
Keyword(s):  
Small Sample Size ◽  
Small Sample ◽  
Plane Angle ◽  
High Angle ◽  
Premolar Extraction ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Vertical Changes ◽  
Cephalometric Changes ◽  
Mandibular Plane Angle

ABSTRACT Aims and objectives Orthodontists generally agree that nonextraction treatment is associated with downward and backward rotation of the mandible and an increase in the lower anterior face height (LAFH). They also agree that extraction line of treatment is associated with upward and forward rotation of the mandible and decrease in the LAFH. The intent of this cephalometric investigation was to examine the wedge hypothesis, that the vertical dimension collapses after first bicuspid extraction. The present study was undertaken to evaluate the cephalometric overbite and vertical changes following first premolar extraction in high angle cases. Materials and methods Forty-five adult patients having high mandibular plane angle, i.e. Gogn – SN more than or equal to 32° having class I molar and canine relation were included. Preand post-treatment lateral cephalograms were measured and compared to analyze the cephalometric changes. Results There was no decrease in the overbite and vertical changes following first premolar extraction in high angle cases. Clinical significance The facial complex does increase in size with growth, but mandibular plane while moving inferiorly, remain essentially parallel to its pretreatment position due to residual growth and treatment mechanics. Conclusion The study concluded that, There was no decrease in the vertical facial dimension, overbite and mandibular plane angle. However, it should be interpreted with caution, given the small sample size. How to cite this article Ramesh GC, Pradeep MC, Kumar GA, Girish KS, Suresh BS. Over-bite and Vertical Changes following First Premolar Extraction in High Angle Cases. J Contemp Dent Pract 2012;13(6):812-818.

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