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Removable appliances & its classification 1 /certified fixed orthodontic courses by Indian dental academy
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Removable appliances & its classification 1 /certified fixed orthodontic courses by Indian dental academy

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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 provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

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    Removable appliances & its classification 1 /certified fixed orthodontic courses by Indian dental academy Removable appliances & its classification 1 /certified fixed orthodontic courses by Indian dental academy Presentation Transcript

    • INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
    • Removable Appliances Introduction:- • Definition:Orthodontic appliance are devices by means of which mild pressure may be applied to a tooth or group of teeth & their supporting structure so as to bring about necessary changes within the bone which will allow tooth movement. www.indiandentalacademy.com
    • Classification:• Broadly classified into two groups Mechanical -removable -fixed Myofunctional -removable -fixed www.indiandentalacademy.com
    • • Classification of removable appliances:1)According to Graber & Neumann:a) Active appliances-force within the appliance. b) Functional appliances-use muscular forces. 2)According to the function of removable appliances:- www.indiandentalacademy.com
    • a)For buccal or labial movement: -Z spring -T spring b) For lingual movement: -Canine & premolar spring -Molar spring -Soldered auxillary spring c) For mesial & distal movement: -Finger spring -Expansion screw -Canine retractors www.indiandentalacademy.com
    • d) Spring for expansion: -Coffin spring -Screw appliance e)Extrusion & intrusion of teeth: -Anterior bite plane -Posterior bite plane -Inclined plane f) Habit breaking appliances: -Tongue spikes,cribs for tongue thrust. -Lip bumper for lip sucking. -Oral screen for mouth breathing. www.indiandentalacademy.com
    • g)According to attachment:i) Attachment at one end- Cantilever spring ii) Attachment at both end- Labial bow h)Number of arms in spring:i) Single cantilever- Finger spring ii) Double cantilever- Z spring i)According to the coil:i) Spring with coil- U shape canine retractor ii) Spring without coil- Helical coil canine retractor www.indiandentalacademy.com
    • j)According to the placement:i)Buccal spring/Labial springHelical canine retractor ii)Palatal/Lingual springFinger spring, Z spring k)According to force applied:i)Push type-Labial wire of removable appliance ii)Pull type- Retraction ligature www.indiandentalacademy.com
    • l)According to amount of pressure applied:-Heavy pressure -Light pressure m)According to mode of adhesion:-Bonding -Banding n)Functional/muscle motivating orthodontic appliance are divided into thre broad categories[Graber Neumann] Group I-Teeth supported appliance eg:Inclined planes,Oral sheilds Group II-Teeth/tissue supported appliance eg:Activator , Bionator www.indiandentalacademy.com
    • Group III- Vestibular positioned appliance eg: Frankel functional regulator Oral screens o) Schwarz recognized the intimate relationship of force magnitude & tissue response & classified orthodontic force into four degrees of biological efficiency [Graber Neumann] i) First degree of efficiency: The orthodontic force in the first degree of efficiency are below the threshold of stimulation needed to activate orthodontic tooth movement or they are balanced by compensatory forces. eg: Frankel appliance www.indiandentalacademy.com
    • ii) Second degree of efficiency: are that type of forces that are most favorable to achieve continuous tooth movement without root resorption. Resorption of alveolar bone in the pressure zone will happen at the same rate as deposition in the area of tension. iii) Third degree of efficiency: are that forces that can interrupt the blood circulation in the periodontal membrane. They are of medium strength 20-50 gm/cm. The tissue are not yet crushed. www.indiandentalacademy.com
    • iv) Fourth degree of efficiency: are of such magnitude that the periosteal membrane is crushed between the root & alveolar bone in the area of greatest pressure. If continuous, the consequence is extensive necrosis of alveolar bone & root resorption. Irreparable may be caused to the tissue involved. www.indiandentalacademy.com
    • Components:• In removable orthodontic appliancesI. Active components spring bows screws elastics II. Passive components clasp www.indiandentalacademy.com
    • III. Base plate • In fixed orthodontic appliancesI. Active components seprators archwires elastics elastomerics springs magnets www.indiandentalacademy.com
    • II. Passive components bands bracket buccal tubes lingual attachments →lingual buttons →lingual seating lugs →lingual eyelets →lingual cleats →lingual sheaths → lingual elastilugs →lingual ball hooks →lock pins →ligatures wires www.indiandentalacademy.com
    • Ideal requirements • • • • Biologic requirements Mechanical requirements Esthetic requirements Hygienic requirements www.indiandentalacademy.com
    • • Classification of spring: According to attachment:i) Attachment at one end- Cantilever spring ii) Attachment at both end- Labial bow Number of arms in spring:i) Single cantilever- Finger spring ii) Double cantilever- Z spring According to the coil:i) Spring with coil- U shape canine retractor ii) Spring without coil- Helical coil canine retractor www.indiandentalacademy.com
    • Spring wrapped around heavy wire: eg: Apron spring. www.indiandentalacademy.com
    • Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com