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Introduction
Current institution
Publications
Publications (61)
Statement of problem. Studies on the effects of cleaning solutions and hydrothermal aging on the flexural strength and microhardness of additively manufactured (AM) resins are lacking.
Purpose. The purpose of this in vitro study was to evaluate the effect of cleaning solution on the flexural strength and microhardness of resins marketed for AM def...
Objectives
This consensus paper aims to provide evidence‐based insights into the survival and complication rates of ceramic partial coverage restorations (PCRs) and ceramic laminate veneers, focusing on various ceramic materials, including feldspathic ceramics, leucite‐reinforced glass ceramics (LRGC), lithium disilicate ceramics (LDS), and resin m...
Objective
To investigate the nature and availability of evidence on the clinical performance of posterior partial coverage restorations (PCR) fabricated from different ceramic materials, outcome definitions, measurement methods, study drop‐outs and follow ups.
Overview
A systematic literature search (inception‐February 2024) was performed through...
Objective
To determine the clinical performance of partial coverage restorations (PCR) (onlays, occlusal veneers, and partial crowns) composed of different ceramic and ceramic‐based materials to treat extended posterior defects.
Materials and Methods
MEDLINE, Scopus, CENTRAL, ClinicalTrials.gov, and the International Clinical Trials Registry Platf...
Objectives
To analyze survival and complication rates for anterior and premolar laminate‐veneers out of different ceramic materials (feldspathic, leucite‐reinforced glass–ceramic [LRGC], lithium‐disilicate [LDS] and zirconia).
Material and Methods
A systematic literature search was conducted across multiple databases for clinical studies on cerami...
Purpose:
To evaluate the flexural strength (FS) and microhardness of various CAD/CAM restorative materials intended for definitive use. The effect of hydrothermal aging on the mechanical properties of these materials was also investigated.
Materials and methods:
A total of 210 bar-shaped specimens (17 × 4 × 1.5 mm ± 0.02 mm) were fabricated via...
Um ein langfristig stabiles implantatprothetisches Ergebnis zu gewährleisten und das Risiko von Komplikationen zu minimieren, wird empfohlen, ein prothetisch orientiertes Backward-Planning durchzuführen. Digitale Hilfsmittel wie Implantatplanungssoftware können dabei eingesetzt werden, um die ideale Implantatposition virtuell auf Basis von drei-dim...
Background:To reduce the risk of technical and biological complications after dental implant installation, a correct three-dimensional (3D) positioning is desirable. Although there is scientific consensus regarding the superiority in terms of accuracy of implant placement with static computer-assisted implant surgery (sCAIS) compared to free-hand t...
Objectives: To analyze the effect of implant treatment in edentulous patients reha- bilitated with implant-supported fixed complete dentures (IFCDs) or implant overden- tures (IODs) on dental patient-reported outcomes (dPROs).
Materials and Methods: In January 2022, Medline, Embase, CINAHL, Cochrane Library, PubMed Central, Web of Science, and Clin...
Objectives
This in vitro study aimed to assess the influence of the planning software and design of the surgical template on both trueness and precision of static computer assisted implant surgery (sCAIS) performed using surgical guides fabricated using material extrusion (ME).
Methods
Three-dimensional radiographic and surface scans of a typodont...
Fused filament fabrication (FFF) represents a straightforward additive manufacturing technique applied in the medical sector for personalized patient treatment. However, frequently processed biopolymers lack sufficient thermal stability to be used as auxiliary devices such as surgical guides. The aim of this study was to evaluate the dimensional ac...
Background: Virtual planning and guided positioning allow for ideal oral implant installation. Nowadays, vat-polymerization is the most applied technology for the manufacturing of surgical guides. However, production costs are high and extensive post-processing is needed. A more efficient and economical additive technology for this purpose might be...
Background: A 3D virtual patient can be obtained using implant planning systems aligning the digital radiographic and surface datasets. Furthermore, it can be utilized for diagnostic and planning purposes and as a communication tool. Augmented reality and additive manufacturing can improve communication between clinicians and patients, especially i...
Exposure to beryllium (Be) can lead to lung pathologies, such as chronic beryllium disease (CBD). This occupational illness has been more prevalent among dental technicians compared to the non-exposed population. Although most manufacturers state that dental materials are Be-free, this prevalence raises the question of whether the materials are com...
Objective:
To evaluate the impact of reducing the radiographic field-of-view (FOV) on the trueness and precision of the alignment between cone beam computed tomography (CBCT) and intraoral scanning data for implant planning.
Materials and methods:
Fifteen participants presenting with one of three clinical scenarios: single tooth loss (ST, n=5),...
Extrusion‑based printing enables simplified and economic manufacturing of surgical guides for oral implant placement. Therefore, the cytotoxicity of a biocopolyester (BE) and a polypropylene (PP), intended for the fused filament fabrication of surgical guides was evaluated. For comparison, a medically certified resin based on methacrylic esters (ME...
This dental technique describes a novel cost-effective workflow for integrating mandible kinematics into a static virtual patient. Computed tomography data are segmented and merged with intraoral surface scans and a target tracking video reproducing the mandible movements. A 4-dimensional dynamic virtual patient is created by using an open-source s...
This case report presents a novel approach for minimally invasive fully guided apicoectomy of the palatal root of a maxillary first molar using a custom-made 3D-printed template. To date, the development of diagnostic radiographic tools such as high-resolution CBCT devices, as well as of CAD planning software and CAM technologies, like 3D printing,...
The purpose of the study was to compare conventional to digital workflows of occlusal splint production regarding time efficiency, overall fit, and wear. Fifteen Michigan splints were fabricated with a conventional and digital method. The duration for the dentist’s and the dental technician’s workload was recorded. Subsequently, the overall fit was...
Background: Surgical guides to transfer the digitally designed implant position in the oral cavity are primarily produced by means of resin-based additive manufacturing. Vat photopolymerization is mainly used but requires extensive post- processing. As an alternative, fused fila-ment fabrication (FFF) showed to be a straight-forward method for accu...
Deutscher Ärzteverlag I ZZI I 2021 I 37 I 04
Zusätzlich zu den lichthärtenden additiven Fertigungsverfahren (Additive Manufacturing, AM) ist ein unkompliziertes, effizientes und kostengünstiges AM Verfahren sinnvoll. Reduzierte Arbeitsschritte sowie geringere Kosten in der Anschaffung und im Unterhalt können potenzielle Hürden für den Anwender senk...
The ongoing COVID-19 pandemic has revealed alarming shortages of personal protective equipment for frontline healthcare professionals and the general public. Therefore, a 3D-printable mask frame was developed, and its air seal performance was evaluated and compared. Personalized masks (PM) based on individual face scans (n = 8) and a statistically...
Objectives: Fused Filament Fabrication (FFF) represents a cost-effective alternative for 3D-printing of medical devices such as surgical guides for oral implants. Although semi-crystalline polyolefins are widely used in the medical field, they are rarely applied in FFF. Warpage due to thermal shrinkage of polyolefins is the key challenge that is to...
Many studies have evaluated short implants (SIs); however, it is still unclear whether SIs are reliable and can be used to simplify surgical and prosthetic protocols with successful clinical outcomes. The aim of this non-random, conveniently sampled, prospective, split-mouth study was to compare the clinical outcomes when short (SI) (≤8 mm) or regu...
Additive manufacturing is becoming an increasingly important technique for the production of dental restorations and assistive devices. The most commonly used systems are based on vat polymerization, e.g., stereolithography (SLA) and digital light processing (DLP). In contrast, fused filament fabrication (FFF), also known under the brand name fused...
Objective
To assess clinical and patient‐reported outcomes of implant‐prosthetic rehabilitations in patients with a history of head‐neck cancer (HNC), treated with tumor resection without (TR) or with adjuvant radiotherapy (TR/RT). A healthy cohort rehabilitated with the same reconstructive protocols served as control group (C).
Materials and Meth...
A polyolefin with certified biocompatibility according to USP class VI was used by our group as feedstock for filament-based 3D printing to meet the highest medical standards in order to print personal protective equipment for our university hospital during the ongoing pandemic. Besides the chemical resistance and durability, as well as the ability...
Objectives. To investigate the wear resistance of polymers for injection molding, subtractive and additive manufacturing of occlusal devices in comparison with enamel antagonist wear and material properties (i.e., hardness, flexural strength, and flexural modulus).
Methods. Injection molding was compared with milling and the additive technologies s...
Occlusal devices to reduce symptoms of bruxism and temperomandibular disorders can nowadays be manufactured in a digital workflow but studies comparing the accuracy of those occlusal devices are still limited. Therefore, the aim of this investigation was to investigate the accuracy of injection molding compared with four computer-aided design (CAD)...
Background: Immediate implant placement with screw‐shaped implants is constantly investigated in the literature regarding its impacts on hard‐ and soft‐tissue resorption processes after tooth extraction. In contrast, there are little clinical data available regarding immediate implant placement using root‐analogue implants (RAIs).
Aim/Hypothesis:...
Background: Management of head and neck cancer (HNC) requires surgical intervention and/or radio(chemo)‐therapy. Subsequently, implant‐prosthetic treatment allows for a functional and esthetically pleasing rehabilitation. Clinical and patient‐reported outcome measures (PROMs) are used to assess the reliability of such a reconstructive intervention....
Background: Oral implants made of zirconium dioxide (zirconia, ZrO2) showed in both preclinical and clinical systematic reviews and meta‐analyses comparable outcomes to implants made of titanium. However, clinical results are limited to mid‐term follow‐ups and the preclinical findings mainly refer to biological aspects like osseointegration. Despit...
Mid-term data on zirconia oral implants is very rare. Therefore, the aim of this prospective clinical investigation was to evaluate the survival rate and the marginal bone loss of a one-piece zirconia implant after five years. Patient-reported outcomes were also recorded. Zirconia implants to support single crowns (SC) or a 3-unit fixed dental pros...
The objective was to investigate clinical and radiological outcomes of rehabilitations with root-analogue implants (RAIs). Patients restored with RAIs, supporting single crowns or fixed dental prostheses, were recruited for follow-up examinations. Besides clinical and esthetical evaluations, X-rays were taken and compared with the records. Patients...
Concepts for digital denture manufacturing are market-available but studies comparing the trueness of such dentures, either milled (MIL) or additive manufactured, compared to injection molded (IM) ones are still limited. Regarding the impact of artificial aging and microwave sterilization on this parameter, no data are available. Therefore, the pur...
3D printed surgical guides are used for prosthetically-driven oral implant placement. When manufacturing these guides, information regarding suitable printing techniques and materials as well as the necessity for additional, non-printed stock parts such as metal sleeves is scarce. The aim of the investigation was to determine the accuracy of a surg...
For digital impression-making of two-piece oral implants, scan bodies are used to transfer the exact intraoral implant position to the dental laboratory. In this in vitro investigation, the accuracy of digitizing a one-piece ceramic oral implant without a scan body (OC) was compared to that of a standard two-piece titanium implant with a scan body...
While the number of coronavirus cases from 2019 continues to grow, hospitals are reporting shortages of personal protective equipment (PPE) for frontline healthcare workers. Furthermore, PPE for the eyes and mouth, such as face shields, allow for additional protection when working with aerosols. 3-D printing enables the easy and rapid production of...
Various protocols are available to preclinically assess the fracture resistance of zirconia oral implants. The objective of the present review was to determine the impact of different treatments (dynamic loading, hydrothermal aging) and implant features (e.g., material, design or manufacturing) on the fracture resistance of zirconia implants. An el...
Patients presenting both severe maxillary atrophy and dental malposition require a multidisciplinary treatment approach to achieve optimal esthetic and functional results. This case history report demonstrates how digital treatment planning and teeth set-up can serve as a reference for surgical, orthodontic, and prosthodontic procedures, leading to...
Zusammenfassung
In der modernen Zahnmedizin bieten sich Keramikimplantate als Pfeiler für implantatgetragene Restaurationen an. Auch Patienten interessieren sich immer häufiger für metallfreie Versorgungen – sowohl bei der prothetischen Restauration („Was kommt auf mein Implantat?“) als auch bei der Wahl des Materials („Woraus besteht mein Implanta...
Objective
To assess the survival and technical complication rate of partial and full‐arch all‐ceramic implant‐supported fixed dental prostheses (P‐FDP/FA‐FDP) and supporting implants.
Materials and methods
An electronic search through three databases (MEDLINE/Pubmed, Cochrane Library, Embase) was conducted to identify relevant clinical studies wit...
Objective
This review aimed at evaluating the survival and technical complication rates of all‐ceramic implant‐supported single crowns (SC).
Material and Methods
Three electronic databases were searched for clinical studies conducted at ≥ 15 patients examining implant‐supported all‐ceramic SCs over ≥ 12 months. Survival rates of implants and resto...
Objective:
To determine the osseointegration rate of zirconium dioxide (ZrO2) dental implants in preclinical investigations.
Data:
Data on the osseointegration rate was extracted considering the bone to implant contact (BIC), removal torque analysis (RTQ) and push-in tests. Meta analyses were conducted using multilevel multivariable mixed-effect...
Background: All-ceramic bilayer systems suffer from technique-sensitivity, resulting in increased technical complication rates. This might be overcome by monolithic reconstructions, facilitating digital workflows.
Purpose: To evaluate the clinical and patient-reported outcome of CAD/CAM-fabricated implant-supported single crowns (ISCs) made of lit...
Objective:
To evaluate the clinical performance of single crowns (SCs) made of lithium disilicate (LS2) cemented on ceramic implants after a five year observation period. Primary outcomes were the survival/success rate of the SCs and patient-reported outcome measures (PROMs).
Materials and methods:
Twenty-four patients with single tooth loss were...
Background
In the past ten years, several clinical trials evaluating zirconia ceramic implants have been published, showing an increasing interest in a material potentially representing a viable alternative to titanium. The majority of evaluated implants is fabricated of yttrium-stabilized zirconia (Y-TZP) and designed as one-piece implant. However...
Objective: To determine the survival rate and marginal bone loss (MBL) of zirconia dental implants restored with single crowns (SCs) or fixed dental prostheses (FDPs).
Materials and methods: An electronic search was conducted up to November 2015 without any restriction considering the publication time through the databases MEDLINE (PubMed), Cochra...
