Fig. 5
From: Case report: Fabrication of a dental implant guide based on tetrahedron positioning technology
Stone model operation. A Location of the implantation site P1. B Connection of the four points to form a stable tetrahedron, location of P2 through P3 and P4, and determination of the distance between P1–P2 as 39 mm. C Placement of the guide ring followed by fixation with a light-cured temporary crown resin