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

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.

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Comparative effects of the Mandibular Protraction Appliance in adolescents and adults

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.23.3.063-072.oar ◽

2018 ◽

Vol 23 (3) ◽

pp. 63-72 ◽

Cited By ~ 3

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.

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THE INFLUENCE OF THE SAGITTAL DENTOSKELETAL PATTERN ON THE VALUE OF THE SOFT TISSUE PROFILE ANGLES - A CEPHALOMETRIC STUDY

Facta Universitatis Series Medicine and Biology ◽

10.22190/fumb190514011p ◽

2019 ◽

pp. 048

Author(s):

Tatjana Perović ◽

Milena Blažej ◽

Ivan Jovanović

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Class I ◽

Class Iii ◽

Lower Face ◽

Soft Tissue Profile ◽

Lateral Cephalograms ◽

Division 1 ◽

Cephalometric Study ◽

Class Ii Division 1

The aim of this study has been to establish the values of soft tissue profile angles in subjects with dentoskeletal Class I, Class II Division 1, Class II Division 2, and Class III pattern, in order to examine the influence of sagittal dentoskeletal relation on the value of angular profile parameters. This comparative cephalometric study included the examination and the analysis by lateral cephalograms to evaluate soft tissue profile angles for 120 adult Caucasian subjects (60 women and 60 men) from the mid Balkan region divided into four groups towards ANB angle and incisors inclination. The following angles were examined: angle of facial convexity, facial convexity angle for the lower face and the angle of total facial convexity. By investigating the influence of the sagittal dentoskeletal pattern on the value of facial convexity angles, significant differences have been established between subjects with Class I and Class II Division 1 and 2 for all examined angles (p<0.001; p=0.011), while the differences between Class I and Class III are only significant for the facial convexity angle and facial convexity angle for the lower face, while the differences in the overall facial convexity angle are not significant (p=0.067). There are significant differences between subjects for all examined angles except the total facial convexity angle between Class I and Class III.

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Cephalometric changes in Class II division 1 patients treated with two maxillary premolars extraction

Dental Press Journal of Orthodontics ◽

10.1590/s2176-94512013000400010 ◽

2013 ◽

Vol 18 (4) ◽

pp. 61-69 ◽

Cited By ~ 3

Author(s):

Marisana Piano Seben ◽

Fabricio Pinelli Valarelli ◽

Karina Maria Salvatore de Freitas ◽

Rodrigo Hermont Cançado ◽

Aristeu Correa Bittencourt Neto

Keyword(s):

Class Ii ◽

Upper Lip ◽

Soft Tissue Profile ◽

Lateral Cephalograms ◽

Division 1 ◽

Maxillary Premolars ◽

Fixed Appliances ◽

Cephalometric Changes ◽

Tissue Alterations ◽

Class Ii Division 1

OBJECTIVE: The purpose of this study was to evaluate the cephalometric alterations in patients with Angle Class II division 1 malocclusion, orthodontically treated with extraction of two maxillary premolars. METHODS: The sample comprised 68 initial and final lateral cephalograms of 34 patients of both gender (mean initial age of 14.03 years and mean final age of 17.25 years), treated with full fixed appliances and extraction of the first maxillary premolars. In order to evaluate the alterations due the treatment between initial and final phases, the dependent t test was applied to the studied cephalometric variables. RESULTS: The dentoskeletal alterations due to extraction of two maxillary premolars in the Class II division 1 malocclusion were: maxillary retrusion, improvement of the maxillomandibular relation, increase of lower anterior face height, retrusion of the maxillary incisors, buccal inclination, protrusion and extrusion of the mandibular incisors, besides the reduction of overjet and overbite. The tissue alterations showed decrease of the facial convexity and retrusion of the upper lip. CONCLUSIONS: The extraction of two maxillary premolars in Class II division 1 malocclusion promotes dentoskeletal and tissue alterations that contribute to an improvement of the relation between the bone bases and the soft tissue profile.

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Upper Airway Dimensions in Class II Malocclusion

The Angle Orthodontist ◽

10.2319/081406-332 ◽

2007 ◽

Vol 77 (6) ◽

pp. 1046-1053 ◽

Cited By ~ 40

Author(s):

Mirja Kirjavainen ◽

Turkka Kirjavainen

Keyword(s):

Treatment Time ◽

Upper Airway ◽

Class Ii ◽

Class I ◽

Class Ii Malocclusion ◽

Cross Sectional ◽

Lateral Cephalograms ◽

Division 1 ◽

Upper Airway Structure ◽

Class Ii Division 1

Abstract Objective: To study the effects of cervical headgear treatment of Class II division 1 malocclusion on upper airway structures in children. Materials and Methods: Forty children aged 9.1 (7.2–11.5) years with Class II division 1 malocclusion were treated using a cervical headgear as the only treatment appliance. The headgear consisted of a long outer bow bent 15° upward and a large inner bow expanded 10 mm larger than the intermolar distance. Lateral cephalograms were taken before and after the treatment. Upper airway structures were estimated from the cephalograms. The results were compared to cross-sectional data of 80 age-matched controls with a Class I molar relationship. Results: A Class I molar relationship was achieved in all treated children. The mean treatment time was 1.6 (0.3–3.1) years. The Class II malocclusion was accompanied by a similar or wider nasopharyngeal space than in the controls but narrower oro- and hypopharyngeal spaces. The retropalatal area was widened by the treatment (P < .05), whereas the rest of the oropharynx and hypopharynx remained narrower than in the controls. Before the treatment, the mandibular plane was in a more horizontal position than in the controls, but during the treatment, it rotated to a position similar to that of the controls. Conclusion: Class II division 1 malocclusion is associated with a narrower upper airway structure even without retrognathia. Headgear treatment is associated with an increase in the retropalatal airway space.

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Two Different Applications of Class II Elastics with Nonextraction Segmental Techniques

The Angle Orthodontist ◽

10.2319/071006-283 ◽

2007 ◽

Vol 77 (4) ◽

pp. 694-700 ◽

Cited By ~ 4

Author(s):

Aslihan Uzel ◽

Ilter Uzel ◽

M. Serdar Toroglu

Keyword(s):

Treatment Time ◽

Control Period ◽

Class Ii ◽

Control Group ◽

Treatment Groups ◽

Facial Height ◽

Lateral Cephalograms ◽

Division 1 ◽

The Mean ◽

Class Ii Elastics

Abstract Objective: To evaluate the relative effects of Class II elastics applied directly with utility arches (UAs) or with the Reciprocal Mini–Chin Cup (RMCC) appliance. Materials and Methods: Thirty patients with Class II division 1 malocclusion were included. Fifteen of them were treated with the RMCC appliance and the other 15 treated with Class II elastics on UAs. Lateral cephalograms of an additional 15 untreated persons having the same characteristics as the treatment groups were used as a control group. Results: The mean control period was 10 months. Class I molar and canine relationships were achieved in a mean treatment time of 4.6 months with the RMCC appliance and in 8.5 months with the elastics on UAs. The amount of overjet reduction was 4.7 mm in the RMCC group (87.87% dental) and 5.2 mm in the UA group (80.76% dental). The molar correction was 4.5 mm in the RMCC group (87.36% dental) and 2.0 mm in the UA group (51.47% dental). The anterior lower facial height increased in both of the treatment groups. Conclusions: The RMCC appliance is a valuable alternative for Class II elastic use in Class II cases in which the upper molars need to be moved to the distal more than the upper incisors.

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The Effect of Premolar Extractions on Incisor Position and Soft Tissue Profile in Patients with Class II, Division 1 Malocclusion*

Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie ◽

10.1007/s00056-009-0813-2 ◽

2009 ◽

Vol 70 (2) ◽

pp. 128-138 ◽

Cited By ~ 10

Author(s):

Catharina Weyrich ◽

Jörg A. Lisson

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Soft Tissue Profile ◽

Division 1 ◽

Class Ii Division 1

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Soft Tissue Profile Changes in Patients With Class II malocclusion

10.21203/rs.3.rs-154363/v1 ◽

2021 ◽

Author(s):

Jovana Milutinovic ◽

Zorana Stamenkovic ◽

Ksenija Zelic ◽

Nemanja Marinkovic ◽

Nenad Nedeljkovic

Keyword(s):

Soft Tissue ◽

Orthodontic Treatment ◽

Class Ii ◽

T Test ◽

Upper Lip ◽

Positive Effects ◽

Nasolabial Angle ◽

Soft Tissue Profile ◽

Division 1 ◽

Class Ii Division 1

Abstract BackgroundThe objective of this study was to identify the soft tissue profile outcomes of orthodontic treatment of Class II, division 1 malocclusion patients and to determine if these changes are related with different treatment protocol.MethodsThe sample of this study consisted of 50 Caucasian patients [22 males; 28 females], with a mean age of 15.8 years. The sample was divided in two groups (both groups treated with multibracket therapy): first group was non-extraction group [25 patients] treated first with the Herbst appliance, and second group was four premolars extraction group [25 patients] treated with a multibracket appliance. The patients’ pre- and post-treatment profile photographs were used, and the soft tissue landmarks were identified. Afterwards, the angular parameters were determined on each photo. Paired-sample t-test was used for intragroup comparisons. For testing the differences in all parameter values between groups, two-sample t test was used.ResultsThe improvement in the non-extraction group was evident in the decrease of the nasomental angle [P=0.02], the angle representing the projection of the upper lip to the chin [P=0.01], as well as the upper lip angle [P=0.01]. On the other hand, the nasolabial angle increased significantly [P=0.01], as well as the mentolabial angle [P=0.02]. In the extraction group, the nasolabial angle showed a significant increase [P=0.03]. Two soft tissue variables showed significant differences between the groups: the total facial angle or facial convexity including the nose [P=0.04] and the angle presenting the projection of the upper lip to chin [P=0.01].ConclusionsThe patients treated without extractions showed a significant improvement of the convex profile and favorable soft tissue changes in the lower third of the face. The orthodontic treatment of Class II, division 1 malocclusions induce positive effects on the soft tissue facial profile, which depends on different treatment protocols.

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Soft Tissue Profile Response in Adult Orthodontic Patients following Extractions

Dental Journal of Advance Studies ◽

10.1055/s-0039-1698366 ◽

2019 ◽

Vol 07 (02) ◽

pp. 074-080

Author(s):

Mandeep Bhullar ◽

Amita Badhan ◽

Sanjay Mittal ◽

Isha Aggarwal ◽

Divya Singla ◽

...

Keyword(s):

Soft Tissue ◽

Adult Patients ◽

Hard Tissue ◽

Premolar Extraction ◽

Nasolabial Angle ◽

Soft Tissue Profile ◽

Lateral Cephalograms ◽

Angular Measurements ◽

Tissue Alteration ◽

Cephalometric Changes

Abstract Introduction The position of the incisors is considered as a key landmark in treatment planning to provide the patient with the most attractive and well-balanced smile. It is important to quantify the relationship between anteroposterior position of incisors to overlying soft tissue structures. Aim The purpose of this study was to evaluate cephalometric changes on the soft tissue profile of the adult patients after first premolar extraction. Materials and Methods The study included pretreatment and posttreatment lateral cephalograms of 24 adult patients (Class II div 1 malocclusion and Class I bimaxillary protrusion) treated with preadjusted edgewise appliance following first premolar extractions. Seven angular and twelve linear soft tissue parameters were evaluated. Six hard tissue parameters were evaluated. Results All the linear and angular measurements pertaining to soft tissue and hard tissue showed significant changes. When posttreatment values were compared with pretreatment values, certain parameters (nasolabial angle, Z angle, UL and LL length, and UL strain) were found to be increased, whereas other parameters showed decrease in their posttreatment values. The tissue alteration showed statistically significant increase in nasolabial angle, Z angle, and decrease in soft tissue profile and interlabial gap. Conclusion Facial profile improvement can be enhanced by dentoalveolar and soft tissue retraction following premolar extraction.

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