Template to determine the position and angulation of the abutment screw channel for implant-supported, cement-retained restorations

Cement Selection for Cement‐Retained Implant‐Supported Prostheses: A Literature Review

“…One way is identifying the location of the abutment screw access opening. Using an abutment screw access guide (template), placement of a well‐defined small ceramic stain on the occlusal surface of the restoration, or superimposition of two digital photographs made of the working cast with and without the restoration have been proposed for easy removal of cemented restorations if required. Another method is using computer‐aided design and computer‐aided manufacturing (CAD/CAM) technology to record the position, angulation, and orientation of the screw access opening through scanning the working cast or the mouth …”

Access to Abutment Screw in Cement Retained Restorations: A Clinical Tip

“…Okamoto and Minagi [9] fabricated a device for removing the cemented superstructure from the implant; however, the technique complicated the fabrication procedure of the crown supported by that abutment. Techniques described in the literature to date for accurately locating the position of the access hole of the abutment under the superstructure are not cost effective and are time consuming measures [10,11].…”

A novel method of 3D printing locating guide for abutment screw removal in cement-retained implant-supported prostheses

“… 1 Several authors have described methods for accomplishing this, including reviewing an implant radiograph and estimating the screws long axis position, 4 using the photograph before the crown is cemented to record the position of the abutment, 5 , 6 using a porcelain stain to mark the screw access point during fabrication, 7 or a vacuum formed guide or template can be fabricated over the final restoration. 8 , 9 Using radiographic or photographic records to estimate the implant position in two-dimensions is inaccurate. 4 , 5 , 6 While marking the screw access point can be advantageous in non-esthetic locations, it has limitations when it comes to anterior restorations.…”