When properly done, the method produces the most accurate bite registration. Since it is important that the opposing models be poured but not be spearated from the impression before being mounted in an articulator, close cooperation from the dental laboratory is necessary if the bite registration is to be accuately utilized. They distort too often due to being either undersie or being distorted by soft tissues pushing the rims. To be absoloutely avoided is putty on the closed bite tray.
Patients have difficulty closing thru the putty.
Also the putty tens to produce distroted impressions due to its elastic memory when it is even partially set. I suggest a heavy body, the thixotropic polysiloxane material on the tray and a very flowable hydophilic material on the tooth. The key is to inject the super flow onto a clean and dry prep and attempt to blow it off the tooth with air. You should see only a thin film remaining over all of the prep. If you see a clean area free of any impression material, you would have missed the impression in this area.