Chemical cure systems simply take too long to complete. Veterinary Dental Techniques by Holmstrom, Frost, and Gammon has an excellent presentation of the various crown prep procedures commonly used in veterinary dentistry and the reader is referred to this text. Polyvinylsolaxane products work well in animals' mouths giving very accurate impressions. Alginate impressions are not satisfactory as an impression material for crowns due to dimensional instability. Once taken the impressions are sent to the dental lab for crown fabrication.
Precious alloys tend to be too expensive for most owners and porcelain crowns too fragile.
Finally, the MOST important part of endodontic therapy is radiology. The standard in veterinary dentistry is to radiograph the tooth multiple times during the procedure. Without radiography it is impossible to determine if an apical fill is accomplished. The more compulsive the veterinarian is in documenting with x-rays, the higher the success rate the animals will enjoy. Once the root canal procedure is finished, the tooth crown is restored to a functional state.