Bernd Wöstmann

Capturing of interdental areas with digital and conventional impression systems and their impact on automatic tooth segmentation in CAD software: an in vitro study

Katharina Klaus, Linus Vincent Hardt, Bernd Wöstmann, Sabine Ruf et autres

OBJECTIVES: This in vitro study evaluated and compared the accuracy of digital versus conventional impression systems in reproducing interdental areas (IAs) of periodontally compromised dentitions (PCDs) and examined how impression quality influences automated tooth segmentation in CAD software. MATERIALS AND METHODS: A …

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Correlation between periodontal parameters at teeth and implants: An up to 20-year long-term observational cohort study in periodontitis patients

Kay‐Arne Walther, Mehmet Ali Akdeniz, Bernd Wöstmann, Jonas Adrian Helmut Vogler

OBJECTIVES: The study aimed to evaluate the long-term correlation between periodontal parameters at implants and contra-lateral natural teeth over a follow-up period of up to 20 years in periodontitis patients undergoing supportive periodontal care (SPC). MATERIALS AND METHODS: This observational cohort study …

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Up to 30 years of clinical performance of double-crown-retained removable dental prostheses with spark-eroded friction pins placed in a general dental practice

Karina Zierden, Seline Werdecker, Bernd Wöstmann, Peter Rehmann

PURPOSE: The purpose of this retrospective cohort study was to investigate the clinical performance and longevity of double-crown-retained removable-dental-prostheses (DCR-RDP) with spark-eroded friction pins inserted in a general dental practice and followed up over a period of 30 years. MATERIALS AND METHODS: …

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Impact of reference body position on linear and 3D accuracy of intraoral scans

Alexander Schmidt, Haoyu Liu, Bernd Wöstmann, Maximiliane Amelie Schlenz

PURPOSE: Intraoral scanners (IOS) are widely used in digital implant workflows, and their accuracy is typically evaluated in vitro using reference bodies to establish a coordinate system. While the impact of scanning strategy and evaluation methods on accuracy is well documented, the …

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Changes in tooth loss and prosthetic treatment over a 9-year period: results of the 6th German Oral Health Study (DMS • 6).

Helmut Stark, Stefanie Samietz, A Rainer Jordan, Kathrin Kuhr et autres

OBJECTIVES: This longitudinal study used data from the 6th German Oral Health Study (DMS • 6) to determine the incidence of tooth loss and prosthetic treatment over a 9-year period in participants from the DMS • 6 cohort who were examined in …

Oral health changes in seniors over a 9-year period: results of the 6th German Oral Health Study (DMS • 6).

Ina Nitschke, Helmut Stark, Kathrin Kuhr, Fabian Zimmermann et autres

OBJECTIVES: Oral health is a key determinant of overall wellbeing and general health, particularly in seniors who are often affected by multimorbidity and polypharmacy and may also require nursing care. The German Oral Health Studies (DMS) are population-representative epidemiologic surveys that assess …

Post and Core for Telescopic Crown-Retained Dentures—An In Vitro Comparison of Different Materials Using Chewing Simulation

Jonas Adrian Helmut Vogler, Milan Rachold, Bernd Wöstmann, Peter Rehmann et autres

Objectives: Due to extra-axial forces, post and core (PC) treatment has the worst survival probability in abutment teeth for telescopic crown-retained dentures (TCDs). The reason for this is a mismatch regarding the mechanical properties between PC material and dentin or a poor …

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Periodontal inflammation indices in association to systemic diseases

Kay‐Arne Walther, Jonas Adrian Helmut Vogler, Bernd Wöstmann, Sabine Gröger

OBJECTIVES: Periodontitis is a multifactorial inflammatory disease that has been associated with several systemic inflammatory conditions. Periodontal inflammation indices are quantitative tools used to estimate the inflammatory burden of periodontitis and its potential systemic relevance. The aim of this review was to …

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Post and Core for Telescopic Crown Retained Dentures – An In Vitro Comparison of Different Materials Using Chewing Simulation

Jonas Adrian Helmut Vogler, Milan Rachold, Bernd Wöstmann, Peter Rehmann et autres

Due to extra axial forces, post and core (PC) treatment shows the worst survival probability if the tooth is used as an abutment for telescopic crown retained dentures (TCD). The reason for this is a mismatch of the mechanical properties between PC …

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Age-Related Diagnostic Accuracy and Patient Acceptance of Two Chewing Efficiency Tests: An Exploratory Field Study

Alexander Schmidt, Marie-Christin Lehmann, S. Schlee, Maximiliane Amelie Schlenz et autres

Objectives: This study investigated the impact of age on the diagnostic accuracy and patient acceptance of two chewing efficiency tests: the digital Mini Dental Assessment (MDA) using carrots and the CHEW test by Slavicek using fruit gum, applied in both clinical and …

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Discrepancy Between Surface Wear and Subsurface Fatigue Damage in CAD/CAM Composite Crowns: A Comparative Study of Intraoral Scans and Optical Coherence Tomography

Julie-Jacqueline Kuhl, Maximiliane Amelie Schlenz, Bernd Wöstmann, Christin Grill et autres

Objectives: This study aimed to determine whether surface wear, identified through the superimposition of intraoral scans (IOS), can predict subsurface damage progression detected by optical coherence tomography (OCT) during fatigue testing of computer-aided design/computer-aided manufacturing (CAD/CAM) composite crowns. Methods: Monolithic CAD/CAM composite …

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Calibration of Drucker–Prager plasticity in prosthetic materials: From experimental characterization to reverse-engineering finite element analysis

Christoph Moos, Stefan Kolling, Bernd Wöstmann, Maximiliane Amelie Schlenz et autres

OBJECTIVE: Accurate simulation of prosthetic materials requires constitutive models that capture pressure sensitivity and tension-compression asymmetry beyond linear elasticity. METHODS: This study presents a reverse-engineering workflow to calibrate a Drucker-Prager based constitutive model in LS-DYNA using the semi-analytical model for polymers MAT …

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