Evaluation of the Three-Dimensional Accuracy of Implant Impression Techniques in Two Simulated Clinical Conditions by Optical Scanning

Abstract

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Accuracy of printed casts generated from digital implant impressions versus stone casts from conventional implant impressions: A comparative in vitro study

“…In the present study, the conventional cast group was produced by a protocol similar to other studies that reported minimal deviations when using open tray splinted impression technique, polyether impression materials and type IV low expansion stone (Papaspyridakos et al, ). Nonetheless, the 3‐D implant deviations of conventional casts were slightly higher in this study with mean deviation of 53.49 μm compared to another study which reported mean deviation of 29.8 μm (Sabouhi, Bajoghli, & Abolhasani, ). This could be due to multiple differences between the two studies, such as operator technique, master cast undercuts, difference in implants angulation and implant position within the dental arch.…”

The accuracy of different dental impression techniques for implant‐supported dental prostheses: A systematic review and meta‐analysis

“…Twelve studies with partially edentulous arches had specimens with one implant (one study), two implants (eight studies) and with two and five implants, respectively (one study). Two studies included partially and completely edentulous arches (Sabouhi, Bajoghli, & Abolhasani, ; Sabouhi, Bajoghli, Dakhilalian, Beygi, & Abolhasani, ), one study included completely edentulous arches and a single‐unit restoration (Abdel‐Azim et al., ). Two studies assessed a single unit (Aktas et al., ; Lee, Betensky, Gianneschi, & Gallucci, ).…”

“…The majority of studies of conventional implant impressions (55 studies) did not examine the vertical position of implants. The equigingival (BalaMurugan & Manimaran, ) or supragingival (Sabouhi et al., , ) placement of implants was stated, however, not evaluated for the impression accuracy. Implants were placed at depths of 0, 1 and 3 mm and examined along with other specifications for conventional implant impressions (Martínez‐Rus et al., ).…”

Immediate Implant Placement of a Single Central Incisor Using a CAD/CAM Crown‐Root Form Technique: Provisional to Final Restoration

“…This may or may not be a factor in the final restoration but during initial healing the one piece screw‐retained provisional may play a pivotal role in optimal tissue healing and preservation. Currently available CAD/CAM software allows the clinician to evaluate the existing bony architecture and anatomical dimensions of the tooth before extraction, and then fabricate an ideal provisional matrix that duplicates the natural anatomy . This critical sub‐gingival restorative abutment interface is a separate and defined aspect to the supra‐gingival esthetics and functional aspects of the coronal aspect of the restoration.…”

“…Currently available CAD/ CAM software allows the clinician to evaluate the existing bony architecture and anatomical dimensions of the tooth before extraction, and then fabricate an ideal provisional matrix that duplicates the natural anatomy. [34][35][36][37] This critical sub-gingival restorative abutment interface is a separate and defined aspect to the supra-gingival esthetics and functional aspects of the coronal aspect of the restoration. All the original data acquired is used by the laboratory in conjunction with the gingival displacement formula in designing the optimal submergence and emergence profiles of the abutment relative to the gingival collar and separate crown.…”