• Save
Anchorage in orthodontics  /certified fixed orthodontic courses by Indian dental academy
Upcoming SlideShare
Loading in...5
×
 

Anchorage in orthodontics /certified fixed orthodontic courses by Indian dental academy

on

  • 1,355 views

Welcome to Indian Dental Academy ...

Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients

State of the art comprehensive training-Faculty of world wide repute &Very affordable.

Statistics

Views

Total Views
1,355
Views on SlideShare
1,344
Embed Views
11

Actions

Likes
4
Downloads
0
Comments
0

2 Embeds 11

http://blog.indiandentalacademy.com 7
https://www.facebook.com 4

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Anchorage in orthodontics  /certified fixed orthodontic courses by Indian dental academy Anchorage in orthodontics /certified fixed orthodontic courses by Indian dental academy Presentation Transcript

  • INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • Introduction  Orthodontic tooth movement Force Active components??? www.indiandentalacademy.com
  • Introduction  Active components Generate forces In one direction Equal and opposite force Newton’s third law of motion www.indiandentalacademy.com
  • Introduction  Desired tooth movement is inevitably asso with an opposing force. Anchorage units Anchorage loss Anchorage management www.indiandentalacademy.com
  • Definitions Moyers :  “ Resistance to displacement.”  Active elements and resistance elements. T.M. Graber :  “The nature and degree of resistance to displacement offered by an anatomic unit when used for the purpose of effecting tooth movement.” www.indiandentalacademy.com
  • Definitions Proffit :  “Resistance to unwanted tooth movement.”  “Resistance to reaction forces that is provided (usually) by other teeth, or (sometimes) by the palate, head or neck (via extraoral force), or implants in bone.” www.indiandentalacademy.com
  • Definitions Nanda :  “The amount of movement of posterior teeth (molars, premolars) to close the extraction space in order to achieve selected treatment goals.” Reversal of anchorage www.indiandentalacademy.com
  • Classification – Moyers Anchorage Intraoral Muscular Intramaxillary Cervical Occipital Cranial Facial Intermaxillary Simple Stationary Reciprocal Extraoral Single Compound Reinforced www.indiandentalacademy.com
  • Classification Nanda : 1. A anchorage : critical / severe 75 % or more of the extraction space is needed for anterior retraction . 2. B anchorage : moderate Relatively symmetric space closure (50%) 3. C anchorage : mild / non critical 75% or more of space closure by mesial movement of posterior teeth www.indiandentalacademy.com
  • Classification www.indiandentalacademy.com
  • Classification  Burstone  Group A: Postr teeth contribute less than one quarter to total space closure  Group B: Postr teeth contribute from one quarter to one half to total space closure  Group C: Postr teeth contribute more than one half to total space closure www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  Anchorage value Teeth to be moved Active components Anchorage Extraoral vs intraoral anchorage www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  Factors affecting anchorage value Force magnitude Physiologic force concept F/A www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  Surface area Major determinant Lower incisor vs molar anchorage First principle of orthodontic anchorage www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  For a tooth or group of teeth acting as anchorage unit, pressure within the pdl should be kept as low as possible Heavy forces www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  Pressure Response Curve for Anchor Teeth (A) and Teeth to be Moved (M)  Pressure in the PDL of A is less than the pressure in the PDL of M www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage   2nd factor – pressure distribution Single force vs force couple Second principle of orthodontic anchorage www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  Proffit Tipping – 50-75 g Bodily - 100-150 g Intrusion - 50-75 g Extrusion - 50-75 g Rotation - 50-75 g Uprighting- 75- 125g www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  Tooth which is free to tip has a less anchorage value than a tooth which is restricted in tipping by the application of a force couple www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage  3rd factor – no. of roots and root morphology Multirooted > single rooted Longer rooted > shorter rooted Triangular shaped root > conical or ovoid root Larger surface area > smaller surface area www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage     4th factor – neighbouring structures Quality of the alveolar bone Traumatic extraction 2nd molars inclusion www.indiandentalacademy.com
  • Biologic Aspect Of Anchorage    Soft tissues Fixed app incorporating lip bumper Palatal button www.indiandentalacademy.com
  • Types of anchorage  Simple Anchorage: ‘Dental anchorage in which the manner and application of force tends to displace or change the axial inclination of the teeth that form the anchorage unit in the plane of space in which the force is being applied.’ www.indiandentalacademy.com
  • Types of anchorage    Stationary Anchorage: ‘Dental anchorage in which the manner and application of force tends to displace the anchorage unit bodily in the plane of space in which the force is being applied.’ Refers to the advantage that can be obtained by pitting bodily movement of one group of teeth against tipping of another www.indiandentalacademy.com
  • Types of anchorage  Eg: Retraction of mandibular incisors using first molars as anchorage  Considerably more than Simple Anchorage www.indiandentalacademy.com
  • Types of anchorage   Reciprocal Anchorage: Anchorage in which the resistance of one or more dental units is utilized to move one or more opposing dental units  Dissipation of equal and opposite forces  Diastema closure www.indiandentalacademy.com
  • Types of anchorage  Correction of posterior cross bite through cross elastics www.indiandentalacademy.com
  • Types of anchorage Close to reciprocal anchorage www.indiandentalacademy.com
  • Types of anchorage    Multiple or Reinforced Anchorage: Multiple dental anchorage: Reduces pressure on the anchor units moving them down the slope of the pressure-response curve Tissue - borne anchorage: www.indiandentalacademy.com
  • Types of anchorage  Cortical Anchorage:  Torquing the roots of posterior teeth outward against the cortical plate to inhibit their mesial movement www.indiandentalacademy.com
  • Types of anchorage  Intramaxillry anchorage/ traction  Resistance units are situated within the same jaw www.indiandentalacademy.com
  • Types of anchorage  Intermaxillary anchorage/ traction Resistance units situated in one jaw are used to effect tooth movement in the other jaw  Class III traction Class II traction www.indiandentalacademy.com
  • Palatal and lingual arches Maintain intermolar width Restrict mesial tipping Correction of rotations www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Two bracket system  Cinched  Passive and rigid www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Bilateral expansion www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Bilateral constriction www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Symmetrical V- Bend Bilateral First order activations (Mesiofacial Rotations) www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches Clinical uses  Required in non-extraction T/t  To counter the M-Li rotations produced by space closing forces  Before initiating head gear therapy www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches To decrease the arch perimeter To close any remaining posterior spaces To seat the molar properly for a classII molar finish Mesiolingual Rotations www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Symmetrical V- Bend Bilateral Second order activations (M-D tipping) www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches •Correction of unilateral classII dental malocclusion www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Symmetrical V- Bend Bilateral Third order activations (Facial Root Torque) •To upright the molar roots www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Asymmetrical V- Bend Unilateral First order activations (Mesiofacial Rotations) •Correction of unilateral classII dental malocclusion www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Asymmetrical V- Bend Unilateral First order activations (Mesiolingual Rotations) Unilateral Loss of molar anchorage is required www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches  Asymmetrical V- Bend Unilateral Third order activations (Facial Root Torque) •To correct the unilateral cross bites www.indiandentalacademy.com
  • Two couple orthodontic appliance system : Transpalatal arches Step bends www.indiandentalacademy.com
  • Anchorage and choice of extraction www.indiandentalacademy.com
  • Anchorage and choice of extraction www.indiandentalacademy.com
  • Anchorage and choice of extraction www.indiandentalacademy.com
  • Anchorage and choice of extraction www.indiandentalacademy.com
  • Thank you www.indiandentalacademy.com Leader in continuing dental education www.indiandentalacademy.com