Popular Nickel and Chromium Full Cast Metal Crown ISO9001/200

What's a Full Cast Metal Crown?                                                                                                       

Cast Metal crown is a full crwon restoration which is cast with dental alloy.

Advantages                                                                                                                                     

• High Strength
• Tooth reomoved less
• Fitness
• Long lasting
• Fine protection

Disadvantages                                                                                                                                  

• Inaesthetic
• Metal easy lead to allergy

Indication                                                                                                                                          

• Posterior tooth with Large defect

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• Malposition, Torsoclusion or malformation of posterior tooth

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• Weak posterior abutment of removable partial denture

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• Posterior retiner of fixed partial denture

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• Posterior tooth after RCT ( Roogt Canal Therapy)

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Contraindications                                                                                                                             

• Incontrollable caries

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• People allergic to the metal

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• Tooth with esthetical requirment

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• Residual root

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Design of Metal Crown                                                                                                                  

• Material Selection

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• The position of gingiva margin of the crown

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• To reduce the occlusal force

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Tooth Preparation                                                                                                                             

1) Occlusal Reduction

• Provide the adequate room for the crown 
• Occlusal Surface
• Amout of tooth reduction : 1.0MM

2) Essentials of Occlusal Preparation

• Reduce the inclination of cusp
• Prepare ladder on  large filling material

3) Buccal and lingual reduction

• Provided the adequate room for the crown
• Amount of tooth removing: 1.0MM

4) Essential of buccal and lingual

• Preparation
• The functional cusp level preparation

5)Proxiaml redcuction

• Provide the adequate room for the crown
• Amount of tooth removing:1.0MM

6) Essentials of Axical Preparation

• Axical convergent angle 2-5 degree
• The axical surface agngle preparation to keep the contour of the crown

7)Cervical Preparation

• Chamfer or bevel
• Width of shoulder 
• Non- Noble metal :0.5-0.8MM
• Noble Metal: 0.35-0.5MM

8)Position of Gingival Margin

•  At the gingiva
• 1.0mm above gingiva
• 0.5-1.0mm under gingiva

Impression of Metal Crown

An imprint of the teeth and surrounding tissues formed with a plastic matereial to provide a mold for use in malering restoration

Impression step

• Impression of opposite tooth
• Impression of abutment
• Bite Registraion

Gingival retraction

• Retraction cord
• Impression procedure

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Impression Method

• Two step method
• One step method

Try in of metal crown

• check the gingival margin and tissular surface of the crown
•  Tr