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Technique overview for Class 2 Restorations
The Composi-Tight Clinical Technique is available in PDF format. Download it here. If you don't have the free Adobe Acrobat Reader, you can download it here.
1. Place rubber dam. Isolation of the area helps to prevent contamination
from blood and saliva. As with many dental procedures, aspiration of small parts
is a valid concern.
2. Prepare tooth with conservative Class II preparation. Some
separation between adjacent teeth is required to facilitate easy placement of
the matrix band. If contact is not broken during tooth preparation, a G-Ring®
may be used to create the necessary separation. After a few moments, remove
the G-Ring and place the matrix band.
3. Place contoured sectional matrix band. Over-approximate tooth
curvature by rolling the contoured band with your fingers (Figure 1). This will help
keep the matrix band ends from interfering with G-Ring placement. The band
should be oriented with the concave edge towards the occlusal margin of the
tooth. Slide the band in place from the buccal or lingual side (placing occlusally
may impede the band from dropping into place easily.)
4. Firmly Insert wedge. For optimal contour, gingival seal and tooth separation,
use Garrison's G-Wedge™. A high viscosity resin packed into the preparation will
be trying to displace the band away from the tooth, so wedge firmly (Figure 2).
5. Apply G-Ring retainer. Spread the G-Ring with a Ring Placement Forceps*
and place over the band (Figure 3). Placement of the ring tines on top of the
wedge provides adequate tooth separation for most conservative preparations
(Figure 4).
When using the Original Composi-Tight® System, and when additional tooth
separation is desired with Composi-Tight Gold and Composi-Tight Silver Plus,
place the ring tines between the matrix band and wedge (Figure 5).
For preparations where there is buccal or lingual extension, place the ring tines
behind the wedge (Figure 6).This will prevent the ring tines from collapsing the
matrix band into the preparation area.
*(Garrison part number MRDF-100,AUMRDF-100 and UNVF-100 Ring Placement Forceps will hold the
rings more securely and provide ample force to open the rings. Some rubber dam clamp forceps may
not open the G-Rings far enough to allow placement.)
6. Burnish the band. Very Important: Burnish the band against the
adjacent tooth to make sure there is no spring-back of the band. This will
ensure an excellent contact.
7. Use your preferred etching, disinfecting, and bonding technique.
Bonding agents that bond to metal will bond to the matrix band. Care should be
taken with these materials to minimize bonding the matrix band to the restoration.
8. Apply your preferred composite resin. Incrementally apply and cure the
composite resin in 2mm thick applications to assure a full cure of the restoration.
9. Remove the G-Ring, wedge and band. Because of the superior contact
achieved with the Composi-Tight matrix systems, removal of the band requires a
Band Placement and Removal forceps (Model #DF6-8), Howe Pliers or hemostat.
10. Contour and polish the restoration.
Technique for MOD Restorations
1. Prepare the tooth as in steps 1 and 2 above.
2. Place and wedge two bands on both sides of the tooth being restored.
3. Apply the G-Rings. Place a ring with standard length tines (yellow) on the mesial
interproximal area. Secondarily place a ring with long tines (blue) on the distal
interproximal area (Figure 7).
4. Complete the procedure as outlined in steps 5-9 for Class II restorations above.
Notes for multiple-tooth restorations:
- G-Rings with differing tine lengths may be used as outlined
above for MOD restorations.
- If back-to-back restorations are performed on adjacent teeth, one must be filled
and cured first. Subsequently, the adjacent band may be burnished against the
now hardened restoration to provide a tight contact.
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