8: INSTRUMENTS USED IN BASIC RESTORATIVE PROCEDURES

SECTION 8

INSTRUMENTS USED IN BASIC RESTORATIVE PROCEDURES

Basic restorative procedures involve placement of restorations where tooth tissue has been removed for a variety of reasons (e.g. fractures and caries)

Images

Figure 8.1

Images

Figure 8.2

Images

Figure 8.3

Images

Figure 8.4

Images

FOR ALL RESTORATIONS

FIGURES 8.1a, b; 8.2a, b; 8.3a, b

Name

Spoon excavators

Functions and feature

  • A spoon-shaped working end for ‘spooning’ out dentinal caries from the cavity preparation
  • Edges of working end are sharp

Any remaining caries will be removed with the conventional handpiece and a round bur

Varieties

Various sizes and shapes of working ends – can be double-ended or single-ended

False friends

Cleoid discoid carver, spoon curette, ball burnisher

FIGURES 8.4a, b; 8.5a, b

Name

Gingival margin trimmers (Figure 8.4a, b) Distal (Figure 8.5a, b) Mesial

Function and feature

  • Used to remove unsupported enamel for refining the cavity preparation
  • Sharp-bevelled working ends

False friends

Spoon excavator, Hollenback 3½ carver, Wards carver

Figure 8.5

Images

Figure 8.6

Images

Figure 8.7

Images

Figure 8.8

Images

FIGURE 8.6a, b

Name

Enamel chisel

Function and feature

  • Used to remove unsupported enamel for refining the cavity preparation
  • Sharp-bevelled working ends

Varieties

Various sizes and shapes available

False friends

Push scaler, ligature tucker

FIGURE 8.7

Name

Enamel hatchet

Function and feature

  • Used to remove unsupported enamel for refining the cavity preparation
  • Working end is on the same plane as the handle

Varieties

Various sizes and shapes available

False friends

Push scaler, gingival margin trimmer, enamel chisel

FIGURE 8.8a, b

Name

Disposable applicators

Function(s)

  • Used to apply materials intra-orally, e.g. desensitising agents, bonding agents and cavity varnish
  • 8.8b are inserted into a plastic handle

Varieties

Many different types and shapes available

Figure 8.9

Images

Figure 8.10

Images

Figure 8.11

Images

FIGURE 8.9

Name

Calcium hydroxide applicator

Function

  • Used to apply calcium hydroxide and other lining materials at the base of the cavity preparation

Varieties

Different sized working ends and long handles available

FIGURE 8.10a, b, c

Name

Mixing spatulas: (a) Stainless steel Weston spatula (b) Stainless steel broad bladed spatula (c) Anodised aluminium spatula

Function and feature

  • Used to mix dental materials
  • Anodised aluminium spatula will not stick to any composite materials or discolour materials (Figure 8.10c)

Varieties

Different sizes, degrees of flexibility and shapes available

FIGURE 8.11

Name

Dispensing wells

Function

  • Used to hold material to be dispensed (e.g. bonding agent)

Varieties

  • Available in various shapes and sizes
  • Available with a small orange shield over dispensing hole to protect dispensed materials from light
  • Available as disposable type

Figure 8.12

Images

Figure 8.13

Images

Figure 8.14

Images

FIGURE 8.12a, b

Name

(a) Glass dappen dish (b) Disposable plastic dappen dishes

Function

To hold materials for dispensing

Varieties

Various shapes, sizes and colours available

FOR AMALGAM RESTORATIONS

FIGURE 8.13

Name

Flat plastic instrument. Also called: plastic instrument

Functions

  • To deliver materials to the cavity preparation
  • To remove excess materials

Varieties

  • Various sizes and shapes available
  • Can be single-ended or double-ended

False friends

Spoon excavator, Hollenback carver, Wards carver

FIGURE 8.14a, b

Name

(a) Metal amalgam carrier (b) Plastic amalgam carrier

Function, features and precaution

  • Used to pick up, transport and place amalgam into the cavity preparation
  • Working end is hollow
  • A plunger/lever pushes amalgam out from working end into the cavity preparation
  • The working end may be Teflon® coated so the amalgam will not stick
  • Care must be taken to expel the excess amalgam or it will set inside the working end
  • Sterilisation procedures may vary depending on the material that the amalgam carrier is fabricated from

Varieties

  • Various delivery methods
  • Various sizes of working ends for different amounts of amalgam needed
  • Can be single-ended or double-ended

Figure 8.15

Images

Figure 8.16

Images

Jan 8, 2015 | Posted by in Dental Nursing and Assisting | Comments Off on 8: INSTRUMENTS USED IN BASIC RESTORATIVE PROCEDURES
Premium Wordpress Themes by UFO Themes