#Education 01. Jan 2026

How accurate is the fit with extraoral scanning and the reverse scan body protocol?

A selected scientific recommendation by Dr. Marcin Maj: "Reverse scan body: A retrospective clinical study with 30 edentulous jaws" by Panos Papaspyridakos, E Armand Bedrossian, Sindhu Kanikicharla, Panagiotis Ntovas, Abdul Basir Barmak, Konstantinos.

STUDY OBJECTIVES AND METHODS

The purpose of this study was to evaluate the accuracy of fit of full-arch zirconia prostheses fabricated using a fully digital workflow with extraoral scanning with the reverse scan body protocol. This retrospective study included 30 patients treated with zirconia full-arch implant-supported fixed complete dental prostheses (IFCDPs). Out of these 30 patients, 15 patients received IFCDPs supported by four implants, and the other 15 received IFCDPs supported by six implants. Each patient underwent full-arch implant rehabilitation with digital workflow using the reverse scan body protocol. Digitally designed verification jigs and prototypes were milled and used to confirm the accuracy of the scan, esthetics, and phonetics for each patient. Following the verification jig, monolithic zirconia IFCDPs were milled, assessed for fit, and delivered. Fit accuracy was evaluated through screw resistance test, visual examination, and radiographs.


RESULTS

  • All 30 milled prostheses (100%) achieved an accurate fit under clinical and radiographic assessment. 

 

 

CONCLUSIONS

Full-arch zirconia prostheses with an accurate fit can be fabricated using extraoral scanning with the reverse scan body protocol.

Adapted from P Papaspyridakos et al., J Prosthodont. 2025 Nov 9, for more info about this publication, click HERE.

This review is part of the Straumann "Scientific Highlights Newsletter 6/25".

More studies:

  • Immediate Implant Placement and Provisionalization Without Guided Bone Regeneration or Connective Tissue Grafting: A Case Report
  • Full Mouth Rehabilitation of a Rare Case of Hypodontia: A Case
  • Clinical and Radiographic Performance of Two Distinct Sandblasted, Large-Grit, Acid-Etched Implant Surfaces: A Split-Mouth Randomized Clinical Trial
  • Health of peri-implant soft tissues adjacent to glazed or polished monolithic zirconia: a randomized clinical trial
  • Evaluation of enamel matrix derivative used alone or added to collagen membrane tissue repair: in vivo animal study using a rat dorsal wound model
  • Peri-Implant Supracrestal Tissue Characteristics Related to Abutment Materials: A Comparative Histomorphometry Study
  • Bone Augmentation of Atrophic Alveolar Ridges Using a Synthetic Bone Substitute With Mesenchymal Stem Cells: A Randomized, Controlled Clinical