CLASS2 MALOCCLUSION /fixed orthodontic courses by IDA

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Information about CLASS2 MALOCCLUSION /fixed orthodontic courses by IDA
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Published on May 8, 2014

Author: indiandentalacademy

Source: authorstream.com

PowerPoint Presentation: CLASS 2 MALOCCLUSON www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com CLASSIFICATION OF CLASS II MALOCCLUSION : CLASSIFICATION OF CLASS II MALOCCLUSION www.indiandentalacademy.com PowerPoint Presentation: PURPOSE OF CLASSIFICATION To localize and quantify any possible skeletal contribution to class2 malocclusion To identify dental displacement associated with the class2 malocclusion. To assign the patient to one of the class2 types www.indiandentalacademy.com MOYERS CLASSIFICATION : MOYERS CLASSIFICATION Six Horizontal types Five vertical types www.indiandentalacademy.com HORIZONTAL TYPES : HORIZONTAL TYPES Type A Type B Type C Type D Type E Type F Normal skeletal ,but class2 dental Syndromal types of class2 Mild skeletal features www.indiandentalacademy.com TYPE-A (Dental class2): TYPE-A (Dental class2) Normal skeletal profile Mand dentition placed normally to its base Max dentition is protracted resulting in class2 molar relation Increased over-jet and over-bite www.indiandentalacademy.com TYPE-B (Max excess): TYPE-B (Max excess) Mid-face prominence Normal mandible www.indiandentalacademy.com TYPE-C: TYPE-C Retrognathic max and mandible Smaller facial dimension Dental protrusion More in females www.indiandentalacademy.com TYPE-D: TYPE-D Max and mand retrognatism Max dental protrusion www.indiandentalacademy.com TYPE-E: TYPE-E Max prognathism and dental protrusion Mand dental protrusion www.indiandentalacademy.com TYPE-F: TYPE-F It is a large heterogeneous group with mild skeletal class2 tendencies It is a milder form of types B,C,D,E. www.indiandentalacademy.com VERTICAL TYPES : VERTICAL TYPES The five vertical types are not as clearly differentiated as the four syndromal horizontal types www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: TYPE-1 (Steep mandibular plane or high angle case) Mand plane and occlusal plane are steeper than normal Palate tipped down ACB tipped up www.indiandentalacademy.com TYPE-2 “ Square face”: TYPE-2 “ Square face” MP,PP,OP and ACB are more horizontal www.indiandentalacademy.com TYPE-3 : TYPE-3 PP tipped up ant Dec ant face ht Open bite www.indiandentalacademy.com TYPE-4 : TYPE-4 PP,MP,OP all are tipped down leaving lip line high Horz B www.indiandentalacademy.com TYPE-5 : TYPE-5 PP tipped down ant Deep bite www.indiandentalacademy.com PowerPoint Presentation: CLASS 2 Skeletal Dental www.indiandentalacademy.com PowerPoint Presentation: A skeletal Class II - fault with the maxilla www.indiandentalacademy.com PowerPoint Presentation: A skeletal Class II - fault with the mandible www.indiandentalacademy.com PowerPoint Presentation: A skeletal Class II - vertical www.indiandentalacademy.com DENTAL CLASS-2: DENTAL CLASS-2 Maxillary Dental protrusion Mesial drift of the maxillary first permanent molars Congenital disease or loss of the primary teeth Ectopic molar eruption Interarch tooth size discrepancy Affects only lips www.indiandentalacademy.com PowerPoint Presentation: Treatment of class 2 Primary dentition Pre-adolescents Adolescents Adults www.indiandentalacademy.com Pre school children (primary dentition) : Pre school children (primary dentition) Distal step Mesial step Flush terminal Mandibular deficiency can be recognized by age 3 www.indiandentalacademy.com PowerPoint Presentation: Growth modification can be used to correct distal step easily As growth continues the discrepancy tends to recur as quickly as it was corrected .( both AP and Vertical skeletal discrepancy) Except in most severe case it is unwise to begin treatment www.indiandentalacademy.com PowerPoint Presentation: Treatment of pre-adolescent children's www.indiandentalacademy.com PowerPoint Presentation: In early years of 20 th century Pressure against growing face( head gear ) Angle introduced class 2 elastics to position mandible forward At later stage in US fixed guide planes were used to force pts to advance the mandible upon closure With advent of ceph it became clear that both elastics and guide planes corrected class2 by mand dental protrusion www.indiandentalacademy.com PowerPoint Presentation: Head gear was re-introduced in 1940s ceph analysis clearly demonstrated not only retraction of upper teeth but also effects on max growth In Europe efforts to stimulate mandibular growth led to the devt of a family of “functional appliances”. www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com PowerPoint Presentation: www.indiandentalacademy.com Thank You: Thank You www.indiandentalacademy.com www.indiandentalacademy.com Leader in continuing dental education

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