PhD Scientific Days 2026

Poster Session 1.O - Dental Research

Evaluation of Intraoral Scanner Performance in Different Restoration Spans by a Clinically Relevant Descriptor

Előadó neve

Dr. Borbola, Dániel

Neptune code

OVQ7JB

Előadó munkahelye

Semmelweis University Department of Restorative Dentistry and Endodontics

Előadó telefonszáma

0036706124236

Előadó e-mail címe

borbola.daniel.jozsef@semmelweis.hu

Az előadás címe

Evaluation of Intraoral Scanner Performance in Different Restoration Spans by a Clinically Relevant Descriptor

Szerző(k) neve és munkahelye

Daniel Borbola¹, Janos Vag¹

1: Semmelweis University Department of Restorative Dentistry and Endodontics

Bemutatás módja

Poszter

Szekció

Poster Session 1.O - Dental Research

Language of the presentation

English

Preferred session

Dental Research

Összefoglaló szövege

From a biological and clinical perspective, marginal adaptation is not purely an average phenomenon. A restoration may fail because of a localized excessive gap even when the overall mean gap is acceptable. Therefore, the upper one-sided 95% limit of marginal gap (MG) values measured circumferentially along the margin of the whole restoration was used as a clinically relevant descriptor.
To assess how intraoral scanner (IOS) performance changes with increasing arch span, using 100µm as the threshold for clinical acceptability.
A resin model was scanned with IOSs. Based on each scan, three restorations were designed using one cement space setting: a complete-arch 16-unit framework, a 4-unit bridge and a single crown. A reference scan of the model was obtained with an industrial-grade scanner (ATOS Q). Virtual-fit was performed in Zeiss Inspect to align each restoration with the abutments. For each scanner and restoration span mean MG and SD were exported and used to calculate the upper one-sided 95% limit as a scan-level descriptor.
For crown scans, all IOSs passed the 100µm threshold based on the 95% confidence interval (CI) of the mean scan-level upper one-sided 95% limit: Medit i900 40µm (95% CI: 38–43), Primescan2 31µm (28–34), R2i3 69µm (56–81), Runyes 55µm (48–62), Shining Elite 39µm (37–41), and Trios6 47µm (44–51). For bridge scans, Medit i900 46µm (42–50), Primescan2 31µm (28–34), Runyes 85µm (75–95), Shining Elite 41µm (38–43), Trios6 58µm (53–63) and R2i3 92µm (80–104) remained below the threshold as its CI included 100µm. For complete-arch scans, Shining Elite 64µm (60–69), Medit i900 77µm (71–83), and Primescan2 79µm (71–86) passed, whereas Runyes 113µm (105–120), R2i3 168µm (148–187), and Trios6 178µm (152–205) failed.
All evaluated IOSs showed clinically acceptable upper-limit marginal gap values for crown and bridge indications. However, complete-arch scans revealed marked differences in span-related error accumulation. Only three IOSs maintained upper one-sided 95% limits below 100µm for complete-arch conditions. Evaluation of upper-tail marginal gap behavior may provide more clinically relevant information than mean values alone.
SUPPORTED BY THE 2025-2.1.1-EKÖP-2025-00014 UNIVERSITY RESEARCH SCHOLARSHIP PROGRAMME OF THE MINISTRY FOR CULTURE AND INNOVATION FROM THE SOURCE OF THE NATIONAL RESEARCH, DEVELOPMENT AND INNOVATION FUND.

University

Semmelweis University

Supervisor

Prof. Dr. János Vág

Publication of my abstract

I do not give consent to the publication of my abstract on the website of the congress.

phd.section.field

in doctoral studies after complex exam (PhD)

Kind

Szabad

Status

elfogadva

Accepted presentation method

poszter

Előadás fájl jóváhagyás

nem rendelkezett róla

Előadó

9033

Start

16:42

End

16:45