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WIRES IN ORTHODONTICS final

INTRODUCTION PHASES OF ARCHWIRE DEVELOPMENT WROUGHT METAL ALLOYS BASIC MECHANICAL PROPERTIES WIRE CHARACTERISTICS OF CLINICAL RELEVANCE GOLD ALLOYS STAINLESS STEEL Multistranded wires Australian Arch wires Ferritic stainless steel (400 series) BCC microstructure Cannot be hardened by heat treatment Not readily work hardenable Martensitic stainless steel (400 series) Less corrosion resistant …

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WIRE SELECTION FIG

The diameter of the wire The composition of the wire The length and configuration of the inter-bracket span The width of the brackets Friction between the wire and the bracket Strain and Stress Elastic Limit Yield Strength Ultimate Tensile Strength Modulus of Elasticity Stiffness Flexibility Resiliency Spring back Stress Relaxation …

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Growth prediction and age estimation

Introduction Methods of growth prediction Gnomic growth and logarithmic spiral Arcial growth Rickett’s cepahlometric prediction Parental data to predict craniofacial growth Johnston method FEM Prediction of mandibular growth rotations Mathematical model  for prediction of craniofacial growth There are several functional conditions which are not violated during orofacial growth- one of …

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VTO

What is a visual treatment objective ? What is the purpose and applicability of VTO ? Methods of prediction:     1.by templates,     2.by cephalogram General concepts of VTO Advantages and disadvantages of VTO Ricketts and Hold away predictions Computer Imaging and prediction How reliable is VTO ?

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VTO SEMINAR NO.2

 In early days of Orthodontic treatment, the original      diagnostic records consisted only of a set of patient      record and the patient’s were classified as Angle’s class      1 or 2 or 3 dental malocclusion.      Treatment prescription during those times basically      aimed at establishing class 1 alignment of the dental      arch. Therefore …

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VS part-2

Separators placed 2 weeks later maxillary  arch bonded and banded Initial archwire -.0175”Respond or .017”.025” D-Rect braided wire is tied with o- ring Treatment started in max arch and allow the mandibular arch to drift for 6 to 8 months [except in class III or bimaxillary protrusion cases] 2 weeks …

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VS part-1

–  Introduction –  Concept and Appliance design          -Diagnosis and treatment planning          -The concept              * Bracket selection              *Bracket height              *Bracket angulation              *Bracket torque              *Bracket in and out              *Archwire selection and sequence -Non Extraction treatment           -Maxillary and mandibular arches           -Extraoral force application                 …

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VME

Introduction:   Vertical malocclusion results from interplay of many etiological factors during growth period. These growth factors include growth of maxilla and mandible, variations in rate of growth in both the maxillary suture and mandibular condyles and dentoalveolar development with the eruption of the teeth. The potential etiological factors other than …

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vistadent

Pauline Arnold Aharon et al (1997)               Quickceph and Dentofacial planner.         Results: Overall prediction was good.         Greater the magnitude of movement larger the prediction error. Ron Jacobson et al (2002)  Dentofacial planner.                       Maxillary Impaction       Results: On average for each patient 80% of actual results             fell within 2mm of …

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VIDEO CEPHALOMETRY

The continued improvement in orthodontic and surgical techniques creates a greater demand for the orthodontist to communicate with the patient and other involved professionals about the projected treatment goals and outcome.     Computerized video imaging technology offers a mutual visual template by which dentists,orthodontists,oral and maxillofacial surgeons,and plastic surgeons …

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VENKY

ASKOV  IS  a  small forming  community with people of Danish origin Prevalence of dental caries was high in this community as Shown by the surveys conducted during 1943 and 1946 Askov dental demonstration program was conducted by Dental section of Minnesota department of health during the period from 1949 to …

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Varisimplex2

The Principles of the Alexander Discipline Vari-Simplex Appliance Design & Construction Non-Extraction Treatment Face Bow Correction of Skeletal Class II Discrepancies in the Alexander Discipline The Orthodontic Management of Vertical Deficiencies Extraction Treatment Finishing & Detailing Treat one arch at a time, beginning in the upper arch; in extraction cases …

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VARI-SIMPLEX

He developed an appliance called the Vari-Simplex Discipline “Vari” refers to the variety of bracket types used. “Simplex” relates to the KISS Principle (Keep It Simple, Sir).   Archwire fabrication is simplified, with first-, second-, and third-order bends placed in the bracket instead of the archwire.   Simpler archwires afford …

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v principle

Appliances are being refined and will continue to improve with the passage of time. This is good, but the danger lies with the individual who fails to recognize that the refinement of appliances may reduce the physical effort put forth in treatment, but will not eliminate the need for the …

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uses of holography

A technique based on pulsed laser hologram interferometry was used to study the dynamics of incisor extrusion. Maxillary central incisors of four subjects were loaded with forces acting along the long axis of the tooth, and the resulting motions were measured noninvasively in three dimensions. The incisor translations and rotations …

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UPPER AIRWAY

The airpressure theory described by Kantorowicz (1916) and James & Hastings (1932) holds that a change to mouth breathing causes the normal negative pressure in the anteriorly sealed oral cavity produced by nasal respiration to be lost, and the palate thus is not carried downward with the growth of the …

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