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| Treatments |
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Crown (dentistry): |
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| A porcelain-fused-to-metal crown for tooth #45 on its stone model. It is now ready to be cemented into the patient's mouth. The prosthetic crown does not extend distally to tooth #47 (molar to the left in photo) because the span is too large, as tooth #46 is missing. This edentulous area, together with a much larger one across the arch in the area of teeth #37-34, will be restored with a removable partial denture. |
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| A porcelain-fused-to-metal crown for tooth #45 on its stone model. It is now ready to be cemented into the patient's mouth. The prosthetic crown does not extend distally to tooth #47 (molar to the left in photo) because the span is too large, as tooth #46 is missing. This edentulous area, together with a much larger one across the arch in the area of teeth #37-34, will be restored with a removable partial denture. |
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| The stone model die for the same PFM crown on tooth #45. Notice how much tooth structure has been removed in order to facilitate placement of a crown. The original dimensions of the tooth approach if not duplicate the contours of the restoration in the photo above. The silvery paint on the stone die of tooth #45 is a die spacer, placed to allow for a minute amount of space between the tooth structure and the internal surface of the crown, which will later fill with cement upon final insertion of the crown into the mouth. |
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| The stone model die for the same PFM crown on tooth #45. Notice how much tooth structure has been removed in order to facilitate placement of a crown. The original dimensions of the tooth approach if not duplicate the contours of the restoration in the photo above. The silvery paint on the stone die of tooth #45 is a die spacer, placed to allow for a minute amount of space between the tooth structure and the internal surface of the crown, which will later fill with cement upon final insertion of the crown into the mouth. |
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| Crown refers to the restoration of teeth using materials that are fabricated by indirect methods which are cemented into place. A crown is used to cap or completely cover a tooth. |
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| Traditionally, the teeth to be crowned are prepared by a dentist and records are given to a dental technician to fabricate the crown or bridge, which can then be inserted at another dental appointment. The main advantages of the indirect method of tooth restoration include: |
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| • Fabrication of the restoration without the need for having the patient in the chair |
| • The utilization of materials that require special fabrication methods, such as casting |
| • The use of materials that require intense heat to be processed into a restoration, such as gold and porcelain. |
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| The restorative materials used in indirect restorations possess superior mechanical properties than do the materials used for direct methods of tooth restoration, and thus produce a restoration of much higher quality. |
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| As new technology and material chemistry has evolved, computers are increasingly becoming a part of crown and bridge fabrication, such as in CAD/CAM technology. |
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