Abstract: Dental articulator apparatus includes a base articulator plate and a top articulator plate mounted on a support stanchion. On confronting surfaces of the top and base articulator plates are formed confronting mold cavities that receive dental “stone” mixed to a “workable” consistency so that the cavities can be filled with plastic “stone” to reconstruct from a “negative” impression a “positive” replica of a patient's teeth in stone. A press ejects the dental stone casting from the mold cavity in which it is formed. Embedded in the stone casting is a plastic sleeve. The plastic sleeve slidably accommodates a guide pin that passes through the cavity wall. To remove the dental stone casting from the mold cavity, the guide pin is first removed by sliding it out of the plastic sleeve. The ejected dental casting may be segmented to separate one stone “tooth” from another.