In the past, extraction was the primary course of treatmen for extensivel decayed primary teeth.
However, with the ability to save primary teeth with large carious lesions, the pulpotomy; and restorations were modalities used.
In addition, crowns were considered a viable alternative to extraction, and more importantly, were recognized as the best mediator in prevention of restorative failure when compared to direct restorations.
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Primary teeth hace been effectively treated with crowns for development defects; after pulpal therapy, for fractured teeth; for restoring "multisurface caries, and for patients at high caries risk", in teeth where a direct restoration (i.e., amalgam, glass ionomer, compsite) is likely to fail; For teeth with extensive wear; and as abutments for space mainteners among others.
Written by Ian Shuman
Image : Dr. Dane Hoang - NuSmile