Endodonty. Determination of concept. Anatomical features of structure of cavity of tooth and root-canals. Stages of opening of cavity of tooth. Endodontical tool: variety, settings, rules of the use. Modern endodontical tool for cleaning and expansion - PowerPoint PPT Presentation

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Endodonty. Determination of concept. Anatomical features of structure of cavity of tooth and root-canals. Stages of opening of cavity of tooth. Endodontical tool: variety, settings, rules of the use. Modern endodontical tool for cleaning and expansion

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Technique of treatment of root-canals forward step and back step by modern endodontic instruments Requirements to the lead through of preparing of root ... – PowerPoint PPT presentation

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Title: Endodonty. Determination of concept. Anatomical features of structure of cavity of tooth and root-canals. Stages of opening of cavity of tooth. Endodontical tool: variety, settings, rules of the use. Modern endodontical tool for cleaning and expansion


1
Endodonty. Determination of concept. Anatomical
features of structure of cavity of tooth and
root-canals. Stages of opening of cavity of
tooth.Endodontical tool variety, settings,
rules of the use. Modern endodontical tool for
cleaning and expansion of root-canals. Standards
of ISO. Basic manipulations in root-canals
amputation, exterpation of pulp, impregnation and
mummification. Medicinal facilities. Modern
methods of treatment of root-canals.
2
  •     To practical dentistry of doctors necessary
    certain sum of knowledges, skills, ability to
    organize the work so that as possible longer to
    save the anatomic and functional wholeness of
    teeth. Special attention patience and knowledges
    needs treatment of teeth with the complicated
    caries basis of which there is endodontical
    interference. Quality of him forecasts subsequent
    positive removal results.

3
  The cavity of every tooth has an original form
and, mainly, repeats the form of crown of the
proper tooth. After of the same type of anatomic
structure of cavity of tooth select 4 basic
groups
  • Cavities of incisives
  • - Cavities of canines
  • - Cavities of premolars
  • - Cavities of molars.

4
In one-root teeth (incisives, canines) a crown
part cavity does not have a bottom and directly
passes to the wide enough root-canal. She has the
same structure in one-root premolar. At premolar
which has two roots, there is the bottom of
cavity, however much it can be such that is
absent within the limits of crown in case that
the division on two channels takes place near-by
the apex of root of tooth. At molar the bottom of
cavity of tooth is well expressed and on him is
expressly selected enter of root-canals.
5
  The variants of structure of root-canals can be
different enough even in one-roots teeth
distinguish their 4 types.
  •     To I type take teeth which have one
    root-canal that proceeds to the apex of root.
  •          To II type is taken by teeth that have
    two root-canals which in the area of apex of root
    unite and end with one channel.
  •          To III type is taken by teeth that have
    two root-canals along the whole length of length
    of root and open on his apex by two separate
    apexes openings.
  •          The To IV type take teeth, which have
    one root-canal which is closed on apex by two (or
    even and more) apexes openings.
  •  

6
CRITERIA OF HIGH-QUALITY PREPARATION OF
CROWNCAVITY FOR ENDODONTIC INTERFERENCE
  • 1. A form and size of cavity provide free access
    by instruments to the root-canals.
  • 2. The walls of carious cavity and cavity of
    tooth make a straight line.
  • 3. There are no overhanging edges.
  • 4. The anatomic form of cavity concerns
    expressly.
  • 5. All necrotizing fabrics of tooth are remote.
  • 6. Expressly certain enter to carious ducting.

7
Roots instruments


8
Pulpoecstraktion
9

Algorithm of trepanation of cavity carious the
staggered tooth
Tooth intact     Near neck cavity.         Carious cavity on an approximal surface (II class)     Carious cavity (II class) on medial and distal approximal surfaces.       Carious cavities are localized below than an equator on approximal surfaces Trepanation of crown of the tooth pursuant to the projection of pulp chamber.   Stopping of near neck cavity, trepanation of crown of the tooth in near neck chamber.   A cavity hatches on a masticatory surface in obedience to the projection of pulp chamber   A carious cavity is stopped on a distal surface, from a medial surface a cavity hatches on a masticatory surface in obedience to the projection of pulp chamber.   Carious cavities are stopped the crown of the tooth is trepanned in obedience to the projection of pulp chamber.
 
10
   Principles and approaches to endodontic
treatment.Select 3 basic periods in endodontic
treatment
  •     Providing of access to the channel
  • Delete of maintenance from a channel and
    preparation of him to stopping
  • Stopping of channel by inert materials for the
    strong pressurizing.

11
Classification of endodontic tool
ISO
  • 1 group is hands files (K and H), reamer (K),
    pulp extractors, plagers and spreaders (vertical
    and lateral plagers of gutta-percha)
  • 2 groups are machine ?- files and K- reamer with
    tailpresss for a tip, chanals fillers
  • 3 is group are the machine coniferous forests
    (G-type, P-type), reamer types ?, D, ?, ??, ?, ?.
  • 4 groups are pins are gutta-percha, silver,
    gilded, paper.

12

Clinical
  • 1 group is diagnostic instruments
  • 2 groups are instruments for the delete of soft
    fabrics of tooth
  • 3 groups are instruments for tooling of channel
  • 3.1 are instruments for expansion of the enter to
    ducting
  • 3.2 are instruments for passing of root-canal
  • 3.3 are instruments for expansion of root-canal
  • 4 groups are instruments for stopping of
    root-canal.
  • 5. Technique of the use of endodontic instruments.

13
   Technique of treatment of root-canals forward
step and back step by modern endodontic
instrumentsRequirements to the lead through of
preparing of root cavity of tooth
  • 1. Creation of cone-shaped form with a minimum
    diameter in the area of the physiology opening
    and maximal in enter the form of channel after
    preparing must exactly repeat his original form
    (to deform not a channel), but must be greater in
    a diameter.
  • 2. Maintenance of balance between the diameter of
    channel and thickness of his walls.
  • 3. Maintenance of unchanging position of the
    apical opening.
  • 4. Creation of retaining form for stopping
    material.
  • 5. Creation of certain resistance at the apex
    opening, that prevents pushing through of
    stopping mass for an apex in periodont.
  • 6. Permanent rest room of cavity of root-canal.

14
Technique step ahead or from crowns downward
  • Feature determine working length of channel not
    before treatment, but after providing of access
    to apical third of channel.
  • Eenter channel fill by solution of antiseptic,
    conduct preparing of enter with the purpose of
    expansion 35 bring a file into a channel to
    resistance and fix length. If entering the file
    of such size is impossible enter more small.
    Conduct treatment by a file to his free motion in
    a channel on the fixed length. Farther conduct
    treatment by the coniferous forests (Gate Glade ?
    80) on that distance, enter in a channel a file
    30 to resistance, fix his length and develop a
    next area, then using to resistance file length
    25 and farther smaller to achievement of working
    length of channel. Conduct determination of
    working length gradually extend apex part to the
    file 25. Walls align 30-35 by H-files

15
Hybrid technique of treatment of root-canals with
the use of profiles (steps ahead step back)
  • Begin treatment of root-canal with expansion of
    enter to one-third of channel by the coniferous
    forests of Gate Glade. At impossibility of the
    use of the coniferous forests - beginning
    expansion of enter is possible by files. After it
    develop a channel by a technique step back to
    distance 1 mm from the prepared part. Smoothing
    of walls conduct by H-files.
  • Modifications of all techniques foresee the uses
    of the newest instruments, as differ by
    durability, flexibility, non-aggressiveness of
    apex profile, protaper, nit flex, G- T-
    rotary-file. For high-quality treatment of
    root-canals use endodontycal (3 types tips
    rotatory 100-400 rotary/min. rotary-reverse
    within the limits of 90 grad. rotary-reverse
    within the limits of 90 grad. with combination
    with vertical motions with amplitude from 0, 4 to
    0, 8 mm) voice, ultrasonic and lasers tips.
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