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Clinical Tips: FenderMate
Matrix for class II Composite Fillings

 


Why should I use FenderMate?

The pre-curved, one-piece sectional matrix and wedge provides for quick composite restorations, with a tight contact and cervical sealing. Final shaping and polishing is only required on the easily accessable lingual and buccal surfaces, while the cervical sealing remains intact.

FenderMate is indicated for small to medium Class II composite fillings, which account for more than half of all Class II fillings. FenderMate offers a fast, safe and predictable means of establishing a composite restoration.

FenderMate is designed to be inserted either buccally or lingually. The matrix reaches from the base of the wedge to just a few millimeters above the occlusal surface. The side of the wedge facing the adjacent tooth has an angled wing. During insertion, the wing presses the matrix firmly against the preparation, giving a tight seal at the cervical margin. To form the contact point the matrix has a pre-contoured indentation, which mimics natural contours. The wing of the FenderMate separates the teeth thus compensating for the thickness of the matrix and retains the space created by the FenderWedge.

 


Two sizes

FenderMate is available in two wedge sizes; Regular and Narrow. Regular sizes are dark in colour, while Narrow is light. FenderMate wedges are coloured either Blue or Green to define Left or Right side respectively. FenderMate may be applied buccally or lingually for best fit.

FenderMate Regular Left and Right - large wing FenderMate Narrow Left and Right - small wing
 


How should I use FenderMate?

After completing the preparation select the appropriate FenderMate and decide whether to insert buccally or lingually. For easy placing of FenderMate it is strongly recommended to use FenderWedge during preparation to create more space between the teeth. 

FenderMate is applied with a steady pressure and a slightly downward and curved movement like a “curved suture needle”. Slide in the matrix until the contact indentation of the matrix is in the optimal position with the adjacent tooth to establish the contact point. The insertion of FenderMate effectively stops possible bleeding. In combination with the tight cervical seal this reduces the risk of blood contaminating the cavity. Bonding and filling can then be completed according to your usual procedure.

It is recommended to leave the matrix in place after curing for initial finishing. This protects the adjacent tooth and facilitates a faster, safer procedure. While cervical sealing is assured, some excess material may occur on the easy-to-access buccal and lingual surfaces.The final shaping of the new filling is limited to the occlusal half of the proximal surfaces.

When FenderMate is removed with either tweezers or forceps, the matrix and wedge may separate. This does not present a problem as matrix and wedge can easily be removed individually. Additional curing is recommended at the axial angles as is usual practice with steel matrixes. Final finishing and polishing may then take place.

The separation caused by FenderMate enables better light-curing accessibility thus enhancing the final restoration.

 


Technique

- Insert as a wedge with a sligthly downward and curved movement like a "curved suture needle".
- Convex matrix shape with flexible wing exerts pressure for maintained separation and cervical marginal adaption. The correct position of the wing is under the level of preparation.
- The pre-contoured contact point adjusts to the space and forms a correct contact.

 


Clinical Cases

Suggested procedure before preparation and placing of FenderMate.


1. Clean the interproximal space with waxed floss.
2. Using a FenderWedge for protection and separation will also simplify the insertion of FenderMate


3. Insert FenderMate under the preparation with firm pressure and a slightly downward, curved movement
4. Slide in the matrix until contact indentation of the matrix is in the optimal position with the adjacent tooth


5. Insert either from the buccal or the lingual aspect

 

 


1. Commence shaping with FenderMate still in place.
2. Remove FenderMate using tweezers or forceps


3. Check for contact point.
4. FenderMate can easily be used with a rubber dam.

 

 

Wide boxes - free hand technique

This preparation provides a wide box. FenderMate creates good contact and prevents cervical overhang under the contact point yet provides excess material on the proximal, buccal side. Most excess material can be easily removed with a carver before curing and then shaped with a finishing diamond.