An apparatus used in forming a template for locating a dental implant osteotomy in a patient's mandible or maxilla. The apparatus includes a guide post and a sleeve having a longitudinal gap. A dental cast of a patient's mandible or maxilla is formed and a hole is drilled in the dental cast wherein the location and orientation of the hole corresponds to a desired location and orientation of the dental implant osteotomy. The guide post is inserted into the hole and the sleeve is magnetically attached. A molding material is applied to a portion of the dental cast and to a portion of an outer surface of the sleeve to form the template. The template, including the sleeve embedded therein, is removed from the dental cast and is used in the patient's mouth to provide a guide means for drilling the osteotomy.