scholarly journals Class II Division 1 malocclusion treatment with extraction of maxillary first molars: Evaluation of treatment and post‐treatment changes by the PAR Index

2020 ◽  
Author(s):  
Johan W. Booij ◽  
Anne Marie Kuijpers‐Jagtman ◽  
Ewald M. Bronkhorst ◽  
Christos Livas ◽  
Yijin Ren ◽  
...  
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Par Index ◽  
Division 1 ◽  
Treatment Changes ◽  
Class Ii Division 1

Long-term Evaluation of Treated Class II Division 1 Malocclusions Utilizing the PAR Index

1995 ◽  
Vol 22 (2) ◽  
pp. 171-178 ◽  
Author(s):  
O. D. Otuyemi ◽  
S. P. Jones
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Anterior Crowding ◽  
Treatment Standard ◽  
Par Index ◽  
Division 1 ◽  
Term Evaluation ◽  
High Treatment ◽  
Class Ii Division 1

The PAR Index was used to evaluate treatment and long-term post-retention results obtained from 50 Class II division 1 malocclusions. Dental casts were used to record the occlusions pre- and post-treatment as well as 1 and 10 years post-retention. The results suggested a high treatment standard, as indicated by mean percentage PAR score reduction. However, maintenance of post-treatment results 1 and 10 years post-retention was only achieved in 60 and 38 per cent of cases, respectively. The major factor involved in this deterioration appeared to be late lower anterior crowding.

scholarly journals Class II division 1 malocclusion treatment with extraction of maxillary first permanent molars: cephalometric evaluation of treatment and post-treatment changes

2021 ◽  
Vol 37 (2) ◽  
pp. 294-310
Author(s):  
Johan Willem Booij ◽  
Anne Marie Kuijpers-Jagtman ◽  
Ewald M. Bronkhorst ◽  
Frits A. Rangel ◽  
Christos Livas ◽  
...  
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Division 1 ◽  
Permanent Molars ◽  
Treatment Changes ◽  
First Permanent Molars ◽  
Class Ii Division 1

A Study of Class II Division 1 Malocclusions Treated by the Andresen Appliance

1981 ◽  
Vol 8 (3) ◽  
pp. 159-163 ◽  
Author(s):  
A. M. Cohen
Keyword(s):  
Class Ii ◽  
Rate Of Growth ◽  
Facial Height ◽  
Division 1 ◽  
Treatment Changes ◽  
Class Ii Division 1

A study was carried out of Class II, Division 1 cases treated by the Andresen appliance. Results were determined in terms of overjet reduction and the reasons for failure were recorded for those cases who did not complete their treatment. Growth and treatment changes were assessed cephalometrically. It was found that those cases showing the more complete overjet reduction also tended to show more growth in facial height and a faster rate of growth in facial height when compared with the less successfully treated cases.

scholarly journals Soft tissue treatment changes with fixed functional appliances and with maxillary premolar extraction in Class II division 1 malocclusion patients

2017 ◽  
Vol 40 (2) ◽  
pp. 214-222 ◽  
Author(s):  
Guilherme Janson ◽  
Nuria Castello Branco ◽  
Aron Aliaga-Del Castillo ◽  
José Fernando Castanha Henriques ◽  
Juliana Fernandes de Morais
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Premolar Extraction ◽  
Division 1 ◽  
Functional Appliances ◽  
Treatment Changes ◽  
Class Ii Division 1

Orthodontic treatment changes of chin position in Class II Division 1 patients

2006 ◽  
Vol 130 (6) ◽  
pp. 732-741 ◽  
Author(s):  
Mark B. LaHaye ◽  
Peter H. Buschang ◽  
R.G. “Wick” Alexander ◽  
Jim C. Boley
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Division 1 ◽  
Treatment Changes ◽  
Class Ii Division 1

Soft-tissue treatment changes in Class II Division 1 malocclusion with and without extraction of maxillary premolars

2007 ◽  
Vol 132 (6) ◽  
pp. 729.e1-729.e8 ◽  
Author(s):  
Guilherme Janson ◽  
Acácio Fuziy ◽  
Marcos Roberto de Freitas ◽  
José Fernando Castanha Henriques ◽  
Renato Rodrigues de Almeida
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Division 1 ◽  
Maxillary Premolars ◽  
Treatment Changes ◽  
Class Ii Division 1

scholarly journals Assessment of facial profile changes in patients treated with maxillary premolar extractions

2012 ◽  
Vol 17 (5) ◽  
pp. 131-137 ◽  
Author(s):  
Renata Rodrigues de Almeida-Pedrin ◽  
Luciane Brigueli Marrone Guimarães ◽  
Marcio Rodrigues de Almeida ◽  
Renato Rodrigues de Almeida ◽  
Fernando Pedrin Carvalho Ferreira
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Facial Profile ◽  
Lay People ◽  
Division 1 ◽  
Before And After ◽  
Profile Changes ◽  
Pre Treatment ◽  
Positive Effect ◽  
Class Ii Division 1

OBJECTIVE: Evaluate the facial profile changes of orthodontic treatment with extraction of two upper first premolars, from the perspective of orthodontists, dentists and lay people. METHODS: Facial profiles of radiographs taken before and after treatment of 70 patients with Class II, division 1 malocclusion were traced. The silhouettes of the 70 patients were randomly assembled in an album with, being two profiles on each sheet of the same patient. Then, 30 orthodontists, 30 dentists and 30 lay people chose the more esthetic facial profile (A or B), and the amount of change they perceived between the two profiles before and after treatment, according to a visual analog scale (VAS). RESULTS: The results revealed that 83 examiners preferred the post-treatment profiles, and only three dentists and four lay people chose the profiles pre-treatment more frequently. Thus, the orthodontists often chose the profiles after treatment, followed by dentists, with no statistically significant differences found between dentists and lay people. There were significant differences within groups in the preference of pre- and post-treatment profile. Furthermore, the three groups of evaluators indicated that pre and post-treatment profiles did not differ substantially. CONCLUSIONS: The treatment of Class II, division 1 malocclusion with extraction of two first premolars has a positive effect on facial profile esthetics.

scholarly journals Treatment changes of hypo- and hyperdivergent Class II Herbst patients

2017 ◽  
Vol 88 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Kim Rogers ◽  
Phillip M. Campbell ◽  
Larry Tadlock ◽  
Emet Schneiderman ◽  
Peter H. Buschang
Keyword(s):  
Class Ii ◽  
Treated Group ◽  
Control Group ◽  
Untreated Control Group ◽  
Mandibular Growth ◽  
Mandibular Plane ◽  
Treated Sample ◽  
Division 1 ◽  
Treatment Changes ◽  
Class Ii Division 1

ABSTRACT Objectives: To determine the relative effects of Herbst appliance therapy in hypo- and hyperdivergent patients. Materials and Methods: The treated group included 45 growing Class II, division 1, patients treated with stainless steel crown Herbst appliances, followed by fixed edgewise appliances. The untreated control group consisted of 45 Class II, division 1, subjects, matched to the treated sample based on Angle classification, age, sex, and pretreatment mandibular plane angle (MPA). Subjects were categorized as hypo- or hyperdivergent based on their MPAs. Pre- and posttreatment cephalograms were traced and superimposed on cranial base and mandibular structures. Results: The primary effect of the Herbst in terms of maxillomandibular correction was in the maxilla. It significantly restricted maxillary growth, producing a “headgear effect.” Mandibular treatment changes depended on divergence. Hyperdivergent patients experienced a deleterious backward true mandibular rotation with Herbst treatment. Hypodivergent patients, as well as untreated hypo- and hyperdivergent controls, underwent forward true mandibular rotation. However, hypodivergent chins did not advance any more than expected for untreated hypodivergent Class II patients. Conclusions: Hypo- and hyperdivergent patients benefit from the Herbst's headgear effect. While the mandibular growth of hypodivergent patients overcomes the negative rotational effects, hyperdivergent patients undergo a deleterious backward mandibular rotation and increases in facial height.

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