Daniel Edelhoff

Ludwig-Maximilians-Universität in Munich | LMU · Department of Prosthodontics

Objectives To assess the clinical performance of tooth-supported 3-unit fixed dental prostheses (FDPs) made from shade-graded monolithic 5Y-PSZ (partly stabilized zirconia) zirconia in terms of survival rate and the quality of restorations based on modified FDI criteria over three-years. Materials and methods High-translucent shade-graded monolith...

The purpose of this study was to examine the biocompatibility of 3D printed materials used for additive manufacturing of rigid and flexible oral devices. Oral splints were produced and finished from six printable resins (pairs of rigid/flexible materials: KeySplint Hard [KR], KeySplint Soft [KF], V-Print Splint [VR], V-Print Splint Comfort [VF], Ne...

Die Innovationsrate und die Marktdurchdringung im Bereich digitaler Dentaltechnologien haben sich in den letzten Jahren enorm beschleunigt. Während sich bei den subtraktiven Fertigungsverfahren seit längerem ein beachtliches Entwicklungs- und Produktivitätsniveau bei breitem Indikationsspektrum etabliert hat, haben additive Verfahren (3D-Druck) bes...

Objective: This article highlights the feasibility of the additive fabrication of ultra-thin veneers made of lithium disilicate using the lithography-based ceramic manufacturing (LCM) method. Clinical Considerations: An esthetical appealing restoration of anterior teeth with thin ceramic veneers is considered one of the ultimate challenges in rest...

Purpose: To investigate whether depth-gauge burs in veneer preparations influence preparation depth in a randomized, controlled, single-blinded trial and whether inexperienced operators can perform adequate veneer preparations. Methods: Participants were 20 undergraduate dental students with no prior veneer preparation experience. The instruments u...

Enossale Implantate gelten heute als ein Mittel der Wahl, um Zähne zu ersetzen und Funktion, Ästhetik sowie Lebensqualität des Patienten wiederherzustellen. Hierbei können diese als Halteelemente für herausnehmbaren oder als Pfeiler für festsitzenden Zahnersatz dienen. Dieser Artikel beleuchtet die physikalischen Eigenschaften implantatgetragener E...

Objectives: Bone resorption around implants could influence the resistance of the implant abutment complex (IAC). The present in vitro study aimed to assess the stability to static fatigue of implants presenting different levels of bone losses and diameters. Materials and methods: Ninety implants with an internal conical connection with 3 differ...

L’imitation de l’esthétique naturelle, en particulier dans la zone des dents antérieures, représente un défi permanent en dentisterie, car on évolue dans un domaine qui, d’une part, pose les plus hautes exigences au prothésiste dentaire en raison de la structure multicouche des dents naturelles et où, d’autre part, les demandes de solutions effi- c...

Die Versorgung von Frontzahndefekten mit dünnen Verblendschalen aus Keramik gilt als „Königsdisziplin“ in der zahnärztlichen Prothetik. Die Herstellung kann auf verschiedene Weisen erfolgen. Bisher werden analoge und digital subtraktive Fertigungswege angewendet. Aufgrund der geringen Schichtstärke sind beide Fertigungswege für den Anwender eine He...

Purpose: Hybrid abutment crowns (HACs) made from monolithic ceramics represent an efficient option for single restorations on implants. However, long-term data are scarce. The purpose of this clinical trial was to evaluate the survival and complication rates of CAD-CAM fabricated HACs over a time period of at least 3.5 years. Materials & methods:...

Objective Evaluating various polishing methods after bracket debonding and excessive attachment material removal for different ceramics and pretreatments. Material and methods Zirconia (ZrO2), leucite (LEU) and lithium disilicate (LiSi) specimens were pretreated with a) silica coated alumina particles (CoJet); LEU and LiSi additionally with b) hyd...

Objective: Several extrusion techniques have been described to restore teeth with insufficient coronal tooth structure and to avoid their extraction. Still, there is little evidence for a treatment concept combining surgical extrusion using an atraumatic axial extraction system. Materials and methods: A total of nine patients, each with an iso-...

Pronounced defects of the dental hard tissue can be caused by different etiological factors. Most frequently, they are associated with changes in the vertical dimension of occlusion, which also may influence the condylar positions. Leading to irreversible loss of tooth structure, these defects can have dramatic functional and esthetic consequences...

Objective: This article highlights a CAD/CAM complete-mouth rehabilitation in an 82-year-old patient by means of a complete maxillary prosthesis and mandibular implant- and tooth-supported fixed restorations made from multilayered zirconia. Clinical considerations: Comprehensive complete-mouth rehabilitations in elderly patients with adaptation...

Implantatgetragener Zahnersatz bei zahnlosen Patienten kann herausnehmbar − mit unterschiedlichsten Verankerungselementen − oder festsitzend gestaltet werden. Art und Umfang der langfristig zu erwartenden Komplikationen beeinflussen entscheidend die Therapieform. Um diese abzuschätzen, wurden 14 implantatgetragene festsitzende Versorgungen (FZE) mi...

Objective: Investigating the impact of different pretreatment methods, attachment materials and aging regimens on shear bond strength (SBS) between zirconia and indirectly bonded brackets using CAD/CAM transfer trays. Methods: Zirconia substrates were conditioned with silica coated alumina (CoJet) and a) Clearfil Ceramic Primer Plus (CF), b) Rel...

Objectives To investigate the initial bacterial adhesion on 3D-printed splint materials in relation to their surface properties. Materials and methods Specimens of five printable splint resins (SHERAprint-ortho plus UV, NextDent Ortho Rigid, LuxaPrint Ortho Plus, V-Print Splint, KeySplint Soft), one polymethylmethacrylate (PMMA) block for subtract...

Background Digital teaching and learning tools, such as computer/mobile apps, are becoming an important factor in modern university education. The objective of our study was to introduce, analyze, and assess an organization and dual assessment app for clinical courses in dental medicine. Methods This was a survey-based study of dental students fro...

Restaurationen aus Lithiumdisilikat wurden bisher entweder per analoger Presstechnik oder über die digitale subtraktive Bearbeitung mithilfe von CNC-Schleifmaschinen hergestellt. Auf der IDS 2021 stellte die Fa. Lithoz (Wien, Österreich) die additive Fertigung mithilfe der Lithoz LCM-Technologie vor. Anhand einer Eckzahnkrone und vier Seitenzahnkro...

Purpose: To investigate the bending moment of implants restored with a directly screwed single-unit fixed dental prosthesis (FDP) compared to implants restored with an FDP polymerized to a titanium base before and after thermomechanical aging. Materials and methods: A total of 240 implants (120 with and 120 without a titanium base) were restored...

Background: The COVID-19 pandemic resulted in significant restrictions on dental teaching. The aim of this investigation was to evaluate the attitudes of faculty members towards digital teaching formats and the effort creating digital lectures. We hypothesized that on the lecturer side there is no difference between the various digital teaching con...

Die subtraktive Fertigung digital konstruierter Totalprothesen mittels „Frästechnik“ ist unter den computergestützten Herstellungstechniken derzeit diejenige der Wahl. Aber auch geeignete additive Fertigungsverfahren könnten in dieser Indikation sinnvoll zum Einsatz kommen. Ziel der vorliegenden Studie war, die Passgenauigkeit von Totalprothesenbas...

Purpose: To analyze the clinical performance of two-wing retained resin-bonded fixed dental prostheses (RBFDPs) after 5 years of clinical use with respect to technical and biologic complications as well as survival and success rates. Materials and methods: RBFDPs were either made of 3Y-TZP zirconia layered by hand (LAVA frame veneered with LAVA...

Background When dental patients seek care, treatments are not always successful, i.e., patients' oral health problems are not always eliminated or substantially reduced. Identifying these patients (treatment non-responders) is essential for clinical decision-making. Group-based trajectory modeling (GBTM) is rarely used in dentistry, but a promising...

The aim of this in vitro study is to investigate the bonding properties of a 3D-printable permanent composite material in comparison to milled composite materials. The tested materials are 3D-printed BEGO VarseoSmile Crown plus (VA1_ab, VA1_nt, VA2_ab, VA2_nt), Vita Enamic (EN1, EN2), and 3M Lava Ultimate (UL1, UL2) (N = 64; n = 8). For this purpos...

Objective: To report the long-term clinical survival and failure rates of single-tooth restorations made of pressable lithium disilicate ceramics (LS2 ) and CAD/CAM resin composite (RC) by two separate clinical observations. Materials and methods: Twenty-one patients (12 female, nine male) were treated with 436 minimally invasive single-tooth re...

Objectives Several materials for 3D printing of fixed dental prostheses (FDP) have been recently introduced. This study aims to evaluate the initial biocompatibility of novel printable resins for manufacturing temporary and permanent FDP. Methods Specimens of five printable resins (VarseoSmile Crown plus, NextDent C&B MFH, VarseoSmile Temp, Temp P...

Background: The COVID-19 pandemic resulted in significant restrictions on dental teaching. The aim of this investigation was to evaluate the attitudes of faculty members towards digital teaching formats and the effort creating digital lectures. We hypothesized that on the lecturer side there is no difference between the various digital teaching con...

Introduction: The demographic change results in an increasing number of older adults in long-term care. Long-term care can be provided either noninstitutionalized by nurses/relatives at private home or institutionalized in nursing homes. As oral health is associated with general health and overall quality of life, numerous studies addressed the ora...

Objectives To test and compare two types of implant systems restored with four monolithic polymer-based materials with regard to their bending moments (BM) before and after aging. Methods A total of 192 tissue-level implants (TRI Dental Implants) differing in the presence (TiB, Octa line, n = 96) or absence (NTiB, Matrix line, n = 96) of a titaniu...

To investigate the influence of different pretreatment methods, attachment materials and artificial aging on shear bond strength (SBS) between monolithic zirconia and metal brackets. Zirconia substrates were pretreated with silica coated alumina (CoJet) and (1) clearfill ceramic primer plus (CF), (2) RelyX ceramic primer (RXP), (3) Futurabond U (FU...

The main objective of this narrative review was to provide an overview of DEFS (Diagnostic Esthetic Functional Splint), namely CAD/CAM manufactured, “snap-retained”, tooth-colored splints available by materials exhibiting a certain degree of elasticity (like polycarbonates or acetal resins) for restoring function, esthetics and occlusion in several...

Objective The study aims to investigate the shear bond strength (SBS) between silicate ceramic restorations and ceramic brackets after different pretreatments and aging methods. Material and methods Leucite (LEU) and lithium disilicate (LiSi) specimens were pretreated with (i) 4% hydrofluoric acid + silane (HF), (ii) Monobond Etch&Prime (MEP), (ii...

Aim: Milling-based, subtractive fabrication of digital complete dentures represents the computer-engineered manufacturing method of choice, but efficient additive manufacturing technologies might prove beneficial for the indication as well. The aim of this study is to evaluate the accuracy of surface adaptation of complete denture bases fabricated...

Objective This paper presents a novel digital workflow that expedites and facilitates the manufacturing of high-end full-ceramic restorations based on “Print and Press”-Technology combined with 3D-printed colored 3D-models. Clinical considerations Despite ongoing innovations and developments in the digital workflow, the precision, and the final es...

Background: The Covid-19 pandemic resulted in significant restrictions on dental teaching. The aim of this investigation was to evaluate the attitudes of faculty members towards digital teaching formats and the effort creating digital lectures. Methods: All German dental faculties were invited from January to April 2021 to the online survey by an a...

Objectives To investigate the impact of different cleaning methods on the fracture load and two-body wear of additively manufactured three-unit fixed dental prostheses (FDP) for long-term temporary use, compared to the respective outcomes of milled provisional PMMA FDPs.Materials and methodsShape congruent three-unit FDPs were 3D printed using thre...

Article Title and Bibliographic Information Bergmann A, Edelhoff D, Schubert O, Erdelt KJ, Pho Duc JM. Effect of treatment with a full-occlusion biofeedback splint on sleep bruxism and TMD pain: a randomized controlled clinical trial. Clin Oral Investig. 2020 Nov;24(11):4005-4018. doi:10.1007/s00784-020-03270-z. Epub 2020 May 19. PMID: 32430774; PM...

Statement of problem: Making impressions of 2-piece implants is typically associated with the repeated disassembly and reassembly of superstructures and related to soft-tissue trauma. Intraoral scanning of 1-piece zirconia implants is problematic because scan bodies are not readily available. Whether using virtual hybrid casts generated by merging...

Background A shortened dental arch (SDA) is an established treatment concept for patients with missing molars. However, little is known regarding long-term course of oral health-related quality of life (OHRQoL) in patients with SDA and the benefits from replacement of missing molars. Aim Purpose of this multi-center randomized clinical trial was t...

Abstract The aim of this study was to quantify and to compare the wear rates of premolar (PM) and molar (M) restorations of lithium disilicate ceramic (LS2) and an experimental CAD/CAM polymer (COMP) in cases of complex rehabilitations with changes in vertical dimension of occlusion (VDO). Twelve patients with severe tooth wear underwent prosthetic...

Purpose: The aim of this study was to evaluate the stability of single crowns and 3-unit bridges in relation to the implant-abutment complex with and without tube in tube connection. Methods: 60 specimens with a total of 90 implants (diameter 3.8 mm) were fabricated and distributed into 4 groups: CST (Crown with short tube), CLT (crown with long tu...

Ectodermal dysplasia (ED) is one of the congenitally syndromic diseases with dental anomalies. This syndrome manifests in various forms and usually requires early restorative therapy to restore esthetics and function in young patients. The restorative approaches vary greatly and range from minimally invasive shape corrections using composite build-...

Popular media now often present 3D printing as a widely employed technology for the production of dental prostheses. This article aims to show, based on factual information, to what extent 3D printing can be used in dental laboratories and dental practices at present. It attempts to present a rational evaluation of todays´ applications of 3D printi...

Purpose: Bone augmentation and implant placement often lead to a coronal shift of the soft tissue. Therefore replacement of the mucogingival border during second-stage surgery is required. Different techniques have been described in the literature. Material and methods: In this case report a new technique for second-stage surgery from a combinat...

VarseoSmile Crown plus ist das weltweit erste keramisch gefüllte Hybridmaterial für den 3-D-Druck permanenter Einzelkronen, Inlays, Onlays und Veneers. In einer Reihe präklinischer wissenschaftlicher Studien wurden verschiedenste Aspekte untersucht. In diesem Bericht werden die Ergebnisse zum Dezementierungsverhalten additiv gefertigter Kronen aus...

Objectives To analyze the oral health-related impact profile in patients treated with three different types of dental prosthesis in student courses.Materials and Methods This prospective bicenter clinical trial was conducted with 151 patients being treated with fixed (n = 70), removable (n = 61), or telescopic dental prostheses (n = 20) in clinical...

Purpose The purpose of this study was to evaluate the tensile bond strength of universal, flowable and bulk-fill resin composites on dentin using different adhesive systems and after artificial aging. Materials and Methods 360 extracted human wisdom teeth were prepared to specimens and divided into 36 groups (n=10). One half of the specimens (180)...

Purpose: To investigate the effect of missing teeth on patients' oral health-related quality of life (OHRQoL). Materials and methods: A total of 151 patients participated in this prospective bicenter clinical study (mean age: 64.7 ± 10.5 years; 71 women). Four subgroups were defined based on the number of missing teeth. OHRQoL was assessed using...

Background: Few long-term studies on treatments in the shortened dental arch (SDA) are available. Objective: The objective of this trial was to analyse the long-term success of two different treatment concepts. Methods: Patients over 35 years of age with missing molars in one jaw and at least the canine and one premolar present on both sides w...

Purpose: To assess the impact of different types of dental prostheses, including definitive and interim restorations, on oral health-related quality of life (OHRQoL) before and after prosthetic treatment. Materials and methods: A total of 151 patients received prosthetic treatment at one of two German departments of prosthetic dentistry. The pat...

Purpose: To evaluate the dimensional discrepancy between the diagnostic wax-up and the resulting mock-up. Materials and methods: A maxillary model with misaligned teeth was scanned, and an initial cast was 3D printed. A total of 60 identical casts were 3D printed from the initial one after scanning, and based on a digital additive veneer wax-up...

Purpose: To investigate the influence of different cleaning methods for additively manufactured fixed dental prostheses (FDPs) for long-term temporary use on the degree of conversion (DC), surface roughness, Martens parameters, and biaxial flexural strength. Materials and methods: A total of 180 specimens per material (3Delta Etemp, DeltaMed; Fr...

Objective The elution of unpolymerized (co-)monomers and additives from methacrylic resin-based materials like polymethyl methacrylate (PMMA) can cause adverse side effects, such as mutagenicity, teratogenicity, genotoxicity, cytotoxicity and estrogenic activity. The aim of this study was to quantify the release and the cytotoxicity of residual (co...

Objective: This literature review summarizes the properties, advantages, limitations, and clinical implications of employing static occlusal indicators compared to quantifiable digital occlusal indicators during occlusal adjustments. Method: An electronic database search of dental literature was carried out in PubMed/MEDLINE using the key words...

Objectives: To present a digital approach to measure and compare material wear behavior of antagonistic first molar restorations made of an experimental CAD/CAM composite (COMP) and lithium disilicate ceramic (LS2) in patients with reconstructed vertical dimension of occlusion (VDO) after generalized hard tissue loss. Methods: A total of 12 pati...

Objectives The purpose of this in vitro study was to assess the two-body wear and fracture behaviour of an experimental additive manufactured composite crown in comparison to zirconia and stainless steel crowns and its cementation protocol for primary molars. Material and methods Three different paediatric crowns – experimental composite crowns (C...

Die Entwicklungsgeschwindigkeit im Bereich der Digitalen Zahn-heilkunde hat ein enormes Tempo angenommen. Für Praktiker wird es zunehmend schwieriger, auf dem aktuellen Stand zu bleiben und das Potenzial neuer Technologien und Konzepte rea-listisch einzuschätzen. Im nachfolgenden Beitrag sollen einige der nach Ansicht der Autoren interessantesten d...

Objectives The purpose of the present study was to analyze treatment outcome with a full-occlusion biofeedback (BFB) splint on sleep bruxism (SB) and TMD pain compared with treatment with an adjusted occlusal splint (AOS).Materials and methodsForty-one patients were randomly allocated to a test (BFB) or a control (AOS) group and monitored over a 3-...

Objective The objective of this in vitro study was to investigate fracture load, fracture types, and impact of chewing simulation of human molars restored with 3D printed indirect polyetheretherketone (PEEK) inlays and compare these with milled indirect PEEK inlays, direct resin composite fillings, and sound teeth. Materials and methods A total of...

Objectives To investigate two-body wear (2BW) and fracture load (FL) of monolithic ceramics after different surface pretreatments. Materials and methods Zirconia (MOZ), lithium-disilicate (LIT), and leucite-reinforced (LEU) specimens (n = 60/group) were manufactured with CAD/CAM-technology and underwent (n = 15/subgroup): 1) grinding + polishing (...

For decades, double crowns in different variations have proven to be reliable attachments in removable prosthetics. Supported by teeth and implants, they provide proper retention, a considerable degree of chewing comfort, and satisfying esthetics. A wide range of applications, optimal oral hygiene capabilities, and almost unlimited expandability ar...

Objectives To investigate and compare the mechanical and optical properties of novel strength- and color-gradient multilayered zirconia and the impact of conventional and high-speed sintering. Materials and methods Following zirconia materials were analyzed and compared: the high-speed sintered Katana Zirconia Block STML (4Y-TZP, KZC), the convent...

Das Sachverständigenpapier „Status Präsens 2020: die additiven CAD/CAM-gestützten Fertigungstechnologien im zahntechnischen Labor“ gibt eine objektive Darstellung der derzeitigen additiven digitalen Fertigungsmöglichkeiten im zahntechnischen Labor. Ziel ist es, der Öffentlichkeit realistisch das Anwendungsspektrum der additiven CAD/CAM-Fertigung be...

Statement of problem New materials and precise manufacturing processes allow for new processes in the veneering and production of fixed dental prostheses. However, data on the bond strength of computer-aided design and computer-aided manufacturing (CAD-CAM) and conventional veneering materials to substrates bonded with different composite resins ar...

Background While some medical associations provide guidelines for the implant‐prosthetic rehabilitation of head and neck cancer patients, the circulation and implementation in the everyday routine of practicing dentists remain unknown. Purpose To analyze patterns of care for the prosthetic rehabilitation of head and neck cancer patients after radi...

Objective To investigate the impact of 3D print material, build direction, post-curing, and artificial aging on fracture load of fixed dental prostheses (FDPs). Materials and methods Three-unit FDPs were 3D-printed using experimental resin (EXP), NextDent C&B (CB), Freeprint temp (FT), and 3Delta temp (DT). In the first part, the impacts of build...

Purpose: This analysis focused on periodontal health in shortened dental arches (SDAs). Methods: In a randomized controlled clinical trial, patients with missing molars in one jaw and at least one premolar and canine on both sides were eligible for participation. In the partial removable dental prosthesis (PRDP) group (n = 79), molars were repla...

Objectives Analyze and quantify the residual monomer elution of nine conventional and CAD/CAM (computer-aided design/computer-aided manufacturing) dental polymers during artificial aging. Materials and methods A total of 360 square–shaped specimens (14 × 12 × 2 ± 0.05 mm) were fabricated from eight CAD/CAM polymer blanks (n = 40): Avadent Base mat...

Purpose: To evaluate the survival and complication rates of full veneer restorations after up to 11 years of clinical service. Materials and methods: Six patients (four men, two women, median age 42.3 ± 4.7 years) were restored with a total of 40 adhesively luted anterior full veneers (maxilla: 36; mandible: 6; mostly canine to canine) made of l...

Purpose: The purpose of this study was to evaluate internal porosities, retentive force values and survival of cobalt-chromium (Co–Cr) alloy clasps fabricated by direct metal laser-sintering (DMLS) and compare them to conventionally cast clasps. Methods: Embrasure clasps were digitally designed fitting teeth 35 and 36 on identical metal models (N...

Statement of problem: Speed sintering has been introduced to enable single-visit monolithic zirconia prostheses. However, the fit and fracture load of zirconia 3-unit monolithic fixed partial dentures (FPDs) after speed sintering are unknown. Purpose: The purpose of this in vitro study was to test the properties of zirconia 3-unit monolithic FPD...