In cases where the lesion is severe, the dentist will use composites which have been reinforced with glass fibre or ceramics. In this way, the tooth becomes more resistant to wear and tear due to its greater durability. In these cases, the treatment takes places over two sessions as the preparation of the restoration is carried out in the laboratory.
The placement of an Onlay does not involve cutting away as much of the tooth as in the cases of crown placement. Ceramic crowns are recommended when there has been a great loss of dental tissue or for aesthetic reasons.
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