Technique for recording the centric relation of digitally fabricated complete dentures

A straightforward intraoral gothic arch tracer for recording the centric relation (CR) of digitally fabricated dentures is described. The gothic arch tracer and evaluated dentures were 3-dimensionally (3D) printed in a single step using polylactic acid. The tracing plate was located on the palatal side of the maxillary denture, with 3 needles arranged in an equilateral triangle connected to the fixation plates on the anterior side of the mandible. The height of the needles ensured the occlusal vertical distance (OVD) and stability of the maxillary and mandibular evaluation dentures. Computer-aided design and computer-aided manufacturing (CAD-CAM) facilitated the parallel alignment of the maxillary tracing plate, occlusion plane, and mandibular fixed plate, ensuring smooth mandibular motion tracing and making it easier to determine the CR of digitally fabricated dentures, saving clinical time.