Dental Problems

What are the Recommendations for Tooth Preparation?

TeethTooth disorders require various procedures for the tooth restoration. There are various recommendations for the tooth preparation which are discussed briefly in this article. Let us examine them.

Recommendations for tooth preparation

questions and answers.

  • Q. How much occlusal reduction should be done?

    A. Though various views have been expressed regarding the occlusal reduction it is found that about 1.5-2mm of reduction has to be done to obtain occlusal clearance. However, as much of the tooth structure as possible must be left for retention.

  • Q. Which surface should be reduced first, proximal or occlusal?

    A. If the proximal reduction is done at the initial step, even with the utilization of wedged rubber dam, some amount of gingival bleeding will occur. If the blood gets on the preparation, it will make the diagnosis of very small pulp exposure difficult.
    Thus, the best plan is to reduce the occlusal as the initial step, removing any caries as part of that step. Next, perform the necessary pulp therapy then proceed with proximal surface reduction.

  • Q.What are the considerations for retention capability of the crown?

    A. It is not only mechanical preparation which is required for the retention but the cementing medium also plays an important role for the retention of stainless steel crown.

  • Q. What are the special recommendations for the preparation of tooth?

      A.

 

  • One has to concentrate on making the stainless steel crown more physiologically acceptable to the gingival as it is seen in our clinical practice and also that cement increases the retentive capacity of all types of preparations.
  • Reducing supragingival bulge with reduction extending 0.5mm below the gingival crest helps to obtain an acceptable gingival response.
  • It is especially significant when the Ion crowns are used because of hardness and difficult of manipulating the nickel steel.
  • When the softer metal crowns (Rocky-mountain) are used, maintaining the cervical bulge may be the preparation of choice.

 

Evaluation criteria for tooth preparation:

  • The occlusal clearance is 1.5 to 2mm.
  • The proximal slices converge toward the occlusal and lingual, following the normal proximal contour.
  • An explorer can be passed between the prepared tooth and the proximal tooth at the gingival margin of preparation.
  • The buccal and lingual surface is reduced at least 0.5mm with the reduction ending in a feather edge, 0.5 to 1mm into the gingival sulcus.
  • The buccal and lingual surfaces converge slightly towards the occlusal.
  • All the point and line angles in the preparation are rounded and smoothed.
  • The occlusal third of buccal and lingual surfaces are gently rounded.

The above article discusses briefly about the recommendations for tooth preparation.

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