9: MATRIX BANDS AND MATRIX RETAINERS

SECTION 9

MATRIX BANDS AND MATRIX RETAINERS

When a restoration involves an interproximal surface, it is not possible to achieve a properly adapted restoration without a matrix band. A matrix band creates a temporary interproximal surface, and, when appropriate, a matrix retainer secures the matrix band in place.

Images

Figure 9.1

Images

Figure 9.2

Images

FIGURE 9.1a, b, c

Name

Matrix material

Function

Used to form a temporary wall where a proximal surface has been removed or is missing

Varieties

(a) Celluloid strip

  • Used for anterior restorations with composite materials
  • Also referred to as clear transparent matrix strip
  • Single use
  • Disposed of in the sharps’ container
  • Preformed posterior variety can be available (see Sectional matrix, Figure 9.3)
(b) T-band matrix (straight and curved)

  • Most commonly used in paedodontics
  • Single use
  • Disposed of in the sharps’ container
(c) Stainless steel matrix band (universal)

  • Used in conjunction with amalgam restorations and a matrix retainer
  • Single use
  • Disposed of in the sharps’ container
  • Different sizes and shapes available
  • Available in pre-contoured shapes

FIGURE 9.2a, b

Name

(a) Tofflemire matrix retainer (b) Siqveland matrix retainer

Function and features

  • Used to hold a stainless steel matrix band securely
  • Assembled to fit in a particular quadrant of the mouth
  • Autoclavable

Varieties

Can be available in disposable plastic

Figure 9.3

Images

Figure 9.4

Images

Figure 9.5

Images

FIGURES 9.3a, b, c, d, e; 9.4

Name

Sectional matrix (Figures 9.3a, b, c, d, e) and BiTineTM ring (Figure 9.4)

Function and features

  • Used in conjunction with posterior resto/>
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Jan 8, 2015 | Posted by in Dental Nursing and Assisting | Comments Off on 9: MATRIX BANDS AND MATRIX RETAINERS
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