Asymmetric Extractions for the Treatment of Class II Subdivision Malocclusion: CASE REPORT
Keywords:
Class II subdivision malocclusion, extraction of three premolars, midline shiftAbstract
Orthodontic treatment is made more difficult by the resulting unbalanced occlusal relation. Class I features are present on one side and Class II on the other in patients with Class II subdivision malocclusions. In these situations, the extraction of four premolars is to create a bilateral Class I molar relation, which requires patient compliance with the usage of Class II elastics. One such Class II subdivision malocclusion case that was handled with asymmetric extractions is presented in the current case report. This method preserves one premolar without compromising dental occlusion or aesthetics and is not dependent on patient cooperation.
Downloads
References
Alavi DG, BeGole EA, Schneider BJ. Facial and dental arch asymmetries in
class II subdivision malocclusion. Am J Orthod Dentofacial Orthop
;93:38-46.
Janson GR, Metaxas A, Woodside DG, de Freitas MR, Pinzan A. Threedimensional evaluation of skeletal and dental asymmetries in class II
subdivision malocclusions. Am J Orthod Dentofacial Orthop 2001;119:406-18.
Janson G, Woodside D, Metaxas A, Henriques J, Freitas M. Orthodontic
treatment of subdivision cases. World J Orthod 2003;4:36-46.
Janson G, Cruz KS, Woodside DG, Metaxas A, de Freitas MR, Henriques
JF. Dentoskeletal treatment changes in class II subdivision malocclusions in
submentovertex and posteroanterior radiographs. Am J Orthod Dentofacial
Orthop2004;126:451-63.
Janson G, de Lima KJ, Woodside DG, Metaxas A, de Freitas MR,
Henriques JF. class II subdivision malocclusion types and evaluation of
their asymmetries. Am J Orthod Dentofacial Orthop2007;131:57-66.
Janson G, Carvalho PE, Cançado RH, de Freitas MR, Henriques JF.
Cephalometric evaluation of symmetric and asymmetric extraction
treatment for patients with class II subdivision malocclusions. Am J Orthod
Dentofacial Orthop2007;132:28-35.
Janson G, Cruz KS, Barros SE, Woodside DG, Metaxas A, de Freitas
MR, et al. Third molar availability in class II subdivision malocclusion. Am
J Orthod Dentofacial Orthop2007;132:279.e15-21.
Rose JM, Sadowsky C, BeGole EA, Moles R. Mandibular skeletal and
dental asymmetry in class II subdivision malocclusions. Am J Orthod
Dentofacial Orthop1994;105:489-95.
Mohammad HA, Abu Hassan MI, Hussain SF. Cephalometric evaluation
for Malaysian Malay by Steiner analysis. Sci Res Essays2011;6:627-34.
Steyn CL, du Preez RJ, Harris AM. Differential premolar extractions. Am J
Orthod Dentofacial Orthop 1997;112:480-6.
Fink DF, Smith RJ. The duration of orthodontic treatment. Am J Orthod
Dentofacial Orthop 1992;102:45-51.
Burstone CJ. Diagnosis and treatment planning of patients with
asymmetries. Semin Orthod 1998;4:153-64.
Lewis PD. The deviated midline. Am J Orthod 1976;70:601-16.
Cheney EA. The influence of asymmetries upon treatment procedures. Am J Orthod. 1952;38:934-45
Cheney EA. Dentofacial asymmetries and their clinical significance. Am J
Orthod 1961;47:814-29.
Todd M, Hosier M, Sheehan T, Kinser D. Asymmetric extraction treatment
of a class II division 1 subdivision left malocclusion with anterior and
posterior crossbites. Am J Orthod Dentofacial Orthop 1999;115:410-7.
Wertz RA. Diagnosis and treatment planning of unilateral class II
malocclusions. Angle Orthod 1975;45:85-94.
Janson G, Araki J, Estelita S, Camardella LT. Stability of class II
subdivision malocclusion treatment with 3 and 4 premolar extractions. Prog Orthod 2014;15:67.
Downloads
Published
Issue
Section
License
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation .
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
