Orthodontics

  if you are intersted in this article please follow for more readings https://myorthodonticsblogg.blogspot.com/       👈🏻 Arch sequencing depends on : 1-   Archwire Types 2-   Archwire Functions 3-   Archwire Sequencing according to cases (where different situations requires sequences ) 4-   Pain associated with Archwire placement and activation  INTRODUCTION        A successful orthodontic therapy depends not only on manual skills and knowledge of treatment steps but also on knowledge and choice of materials used. One of the major components of fixed orthodontic therapy is the choice of wires. Orthodontic wires are defined as devices comprising a wire conforming to the alveolar or dental arch, which is used as an anchorage for correcting irregularities in the position of teeth . Therefore, the aim of the this assignment   was to focus on the differences in the features of wires as well as their working sequence according to the treatment plan.   1-   Archwire Types:

  if you are intersted in this article please follow for more readings https://myorthodonticsblogg.blogspot.com/        👈🏻 Class II Division 2 (definition) : Acc. To Angle’s Classification It is when the buccal groove of the 1 st Mandibular molar occludes distal to mesio-buccal cusp of 1 st maxillary molar with retroclination of maxillary central incisors. Acc. To British Standards classification (Incisor relationship) The lower incisors edgs occlude posteriorly to the   cingulum plateau of the upper incisors &   the lower centrals are retruded (due to lack of stops) Sub-types Type A : Maxillary centrals and      laterals are retroclined. Type B : Maxillary Laterals overlapping the retroclined centrals . Type C : Maxillary centrals and laterals areretroclined and are overlapped by max. canines.   Criteria Extra Oral features : - Shape of head : Brachycephalic - Facial Profile : Convex / Straight - Chin : prominent - Lower lip : Everted (lower

  1-     if you are intersted in this article please follow for more readings https://myorthodonticsblogg.blogspot.com/        👈🏻 Regarding functional matrix theory, all of the following is correct except ……… a-    It denies the intrinsic growth potential of the cartilage. b-    Soft tissue adjacent to the bone is the primary determinant of growth. c-    Both sutures and synchondrosis are growth sites. d-    Capsular matrix molds bony ridges.   2-    The center of rotation occurs at the premolar area in case of …… a-    Forward rotation type I. b-    Forward rotation type II. c-    forward rotation type III. d-    Backward rotation type II.   3-    The increase in the mandibular intercanine width ceases at an age of ……. a-    6 years. b-    9 years. c-    12 years. d-    15 years.   Changes in the rate of growth of a child can be detected using growth charts. a-    True b-    False.   5-    Embryonic stem cells can be derived from the ………….