Tag Archives: Composite Resin

The centripital layered build-up of a posterior direct composite resin

No matter how brilliant the Sydney dentist is, did you know that all composite restorations face as much as 5% polymerized shrinkage?

This phenomenon lead to:

  • Internal debonding and the inevitable dislodgement of the restoration.
  • Marginal openings that causes leaks and re-infection or recurrence.
  • Cuspal flexure and microfractures which causes consequent permanent deformation due to the load subjected by the restorative material.
  • Postoperative sensitivity that may be the result of tissue exposure due to microleakage.
  • Marginal staining, also caused by microleakage.
  • In the clinic, I make use of nanofilled composites to remedy these noted discrepancies with hybrid composites. Nanofilled restorative materials have particles that are as minute as 0.02 microns. With this, restorations are more successful, with recorded shrinkage as low as 1.6%. More so, it allows the dentist to create better restorations.

    The article below does not only count the number of benefits one can enjoy with nanofilled composites. It also discusses the importance of proper manipulation and layering. This technique involves the incremental addition of restorative material into a cavity. Instead of packing a bulk of composite into the tooth, the filling is brought in, little by little, in a technique called “layering”. With the use of a nanofilled composite, you already improve success rates; when you perform the layering technique, you increase polymerization depths, improve aesthetic results and decrease polymerization stress.

    This follows a precise process:

    Step 1: Shade selection. To ensure aesthetic satisfaction, proper shade is selected.

    Step 2: Rubber dam placement. Proper isolation of tooth is performed to improve results.

    Step 3: Preparation. Tooth is drilled to remove diseased tissue and to prepare it to receive the filling material.

    Step 4: Etching. Application of the etchant prepares the tooth to receive the bonding material. Successful etching improves success.

    Step 5: Internal Adaptation. Making use of flowable composite that better penetrates the tissues.

    Step 6: Incremental Layering. Composite resin is added in small amounts.

    Step 7: Building the Proximal Contact. If the restoration involves the proximal areas, the proximal contacts should be restored harmoniously.

    Step 8: Building the Artificial Dentin. Dentin composite is placed in the right shade.

    Step 9: Building enamel layer. Enamel composite is then provided in the right shade.

    Step 10: Occlusal staining. Whether you like it or not, it is done to satisfy aesthetic appeal.

    Step 11: Finishing and Polishing. The tooth is moulded and polished to mimic the appearance of the natural tooth.

    Step 12: Rebonding. For an even more impressive finish, additional shine is provided.

    This process is explained in much detail in the paper attached on this post.


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