2022 ACP Annual Session

Title: Stereophotogrammetry in the Digital Workflow for the Fabrication of Implant-Supported Fixed Complete Prostheses

Abstract: Stereophotogrammetry is used for digital impressions in the rehabilitation of complete arch implant-supported fixed prostheses.1,2 This clinical report describes a complete digital workflow for the rehabilitation of a patient with failing dentition, restored with immediate-loaded transitional and subsequent definitive implant-supported fixed prostheses

Initial Presentation:

64-year-old healthy male with terminal dentition
CC: “My teeth are ugly, and I want to have a nice smile and chew better”
Adequate alveolar quality and restorative space for implant-supported fixed maxillary and mandibular complete dentures

Technique Advantages:

•Stereophotogrammetry provides an alternative technique for multiple implant-supported restorations, including fixed complete prostheses1,2,3

•Digital registration of the maxillomandibular relationship and mandibular movement

•Ability to retain all digitized models, kinematics, and data

•Fewer clinical steps, fewer sources of error, and accurate results2

•Predictable planning, providing an efficient workflow and improving patient satisfaction1,2

•Successful prosthetic outcome with good fit, esthetics, and occlusion

Treatment Sequence:

Step 1: Comprehensive clinical examination of esthetics and phonetics. Diagnostic records including intra-oral scans, digital facebow and axiograph, face scans, CBCT imaging, and photographs

Step 2: Digital diagnostic wax-up, merging with CBCT imaging, and surgical planning of 6 maxillary and 5 mandibular dental implants

Step 3: Teeth extractions, alveoloplasty, and implant placements. Recording the inter-implant spatial relationship using a stereoscopic camera and capturing soft tissue contours with an intraoral scanner

Step 4: Digital design and milling of PMMA interim prostheses

Step 5: Delivery of immediate interim fixed prostheses the day after surgery

Step 6: CAD/CAM fabrication of prototypes

Step 7: After 3 months, delivery of prototypes with changes to idealize esthetics and function

Step 8: CAD/CAM fabrication of definitive restorations

Step 9: Delivery of definitive maxillary and mandibular monolithic Zirconia prostheses and occlusal guard

References:

1- Peñarrocha-Diago M, Balaguer-Martí JC, Peñarrocha-Oltra D, Balaguer-Martínez JF, Peñarrocha-Diago M, Agustín-Panadero R. A combined digital and stereophotogrammetric technique for rehabilitation with immediate loading of complete-arch, implant-supported prostheses: A randomized controlled pilot clinical trial. J Prosthet Dent. 2017;118(5):596-603.

2- Tohme H, Lawand G, Chmielewska M, Makhzoume J. Comparison between stereophotogrammetric, digital, and conventional impression techniques in implant-supported fixed complete arch prostheses: An in vitro study. J Prosthet Dent. 2021;S0022-3913(21)00269-9.

3- Zhang YJ, Qian SJ, Lai HC, Shi JY. Accuracy of photogrammetric imaging versus conventional impressions for complete-arch implant-supported fixed dental prostheses: A comparative clinical study. J Prosthet Dent. 2021;S0022-3913(21)00567-9.

Acknowledgements: Modjaw ⬥⬥ 3Shape ⬥⬥ Straumann® ⬥⬥ Simplant ⬥⬥ PIC by Precise Implants Capture ⬥⬥ Exocad

2022 ACP Annual Session

Stereophotogrammetry in the Digital Workflow for the Fabrication of Implant-supported Fixed Complete Prostheses

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