Frank P Nothdurft

Saarland University | UKS · Klinik für Zahnärztliche Prothetik und Werkstoffkunde

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...

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: 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...

Objective Aim was to assess the influence of a standard autoclaving protocol on the retention of zirconia abutments glued on titanium bases in two-piece implant abutments. Materials and methods Twenty-four CAD/CAM-generated zirconia abutments were adhesively cemented on prefabricated titanium bases. Before mechanical and thermal aging, the specime...

Background: Promoting the directional attachment of gingiva to the dental implant leads to the formation of tight connective tissue which acts as a seal against the penetration of oral bacteria. Such a directional growth is mostly governed by the surface texture. Material and methods: In this study, three different methods, mechanical structurin...

Objectives: To compare oral health-related quality of life (OHRQoL) in patients with either molar replacement by partial removable dental prostheses (PRDP) or with restored shortened dental arches (SDA) over a period of 10 years. Methods: In this multi-center RCT, a consecutive sample of 215 patients with bilateral molar loss in at least one jaw...

Purpose The study aimed at investigating the influence of plasma treatment (PT) and incorporation of 4-META in a conditioning liquid on the shear-bond strength (SBS) to zirconium dioxide. Methods Sixty-four zirconia blocks were embedded and wet ground. The surfaces were either exposed to atmospheric plasma or remained untreated (n=32). Subsequently...

Purpose: The aim of this study was to evaluate the fracture resistance and fracture behavior of monolithic zirconia crowns in accordance with the preparation design and aging simulation method. Materials and methods: An upper first molar was prepared sequentially with three different preparation designs: shoulderless preparation, 0.4 mm chamfer...

The surface of the medical grade titanium alloy (Ti–6Al–4V) was modified using a millisecond laser to alter the topography and wetting behavior. We combined anisotropic surface patterning with a nitriding process which is essential for the protection of dental implants against corrosion and wear. While a homogenous nitride layer was achieved, the l...

Objectives: The aim of the present study was to evaluate the trend of dental practitioners in the federal state of Saarland in Germany in regard to restoring endodontically treated teeth using a Web-based survey. Materials and methods: An interactive Web-based survey instrument was developed, including seven clinical scenarios, presented by phot...

PurposeThe aim of this study was to compare the proliferation and attachment behavior of fibroblasts and epithelial cells on differently structured abutment materials.Materials and Methods Three different surface topographies were prepared on zirconia and titanium alloy specimens and defined as follows: machined (as delivered without further surfac...

Abstract To predict the clinical performance of zirconia abutments, it is crucial to examine the mechanical behavior of different dental implant-abutment connection configurations. The international standard protocol for dynamic fatigue tests of dental implants (ISO 14801) allows comparing these configurations using standardized superstructure geom...

This study aimed to evaluate the fracture resistance of monolithic single crowns made from zirconia (ZI), lithium disilicate (LS2), or feldspar ceramic (FC). Five groups of crowns representing a maxillary first molar were made with the appropriate dimensions according to the manufacturer's instructions. The ZI and LS2 crowns were luted adhesively o...

The aim of this study was to investigate the fracture behavior of metal-ceramic bridges with frameworks from cobalt-chromium-molybdenum (CoCrMo), which are manufactured using conventional casting or a new computer-aided design/computer-aided manufacturing (CAD/CAM) milling and sintering technique. A total of 32 metal-ceramic fixed dental prostheses...

Objective: Zirconia implant abutments have gained a much broader clinical use over the past few years. The aim of the present study was to assess the clinical performance of a pre-fabricated zirconium dioxide implant abutment for single-tooth replacement in the posterior region. Materials and methods: Forty implants of the XiVE(®) S plus screw t...

Vollkeramische Rekonstruktionen basierend auf Oxidkeramiken haben nahezu alle Indikationsklassen der zahngetragenen fest sitzenden Prothetik erobert. Stiftaufbauten, Einzelkronen und Brücken im Front- und Seitenzahnbereich stehen aufgrund ihrer ästhetischen und biologischen Eigenschaften in Konkurrenz zu den etablierten und bewährten metallgestütze...

The purpose of this study was to evaluate the influence of the number of proximal contacts and fiber-reinforced-composite (FRC) post insertion on the fracture behavior of endodontically treated premolars with class II (MOD) cavities and direct composite restorations. Forty-eight single-rooted human premolars were endodontically treated and prepared...

The purpose of this in vitro study was to evaluate the influence of the superstructure-geometry on the fracture behavior of zirconia abutments (Compartis, DeguDent GmbH, Hanau, G). Four different groups (n = 8) representing anterior single crown replacement were prepared. In groups 1 and 2, the implants were restored with customized all-ceramic abu...

Objective: The aim of the study was to test whether abutments made of zirconia are suitable for single-tooth replacement in the posterior region. Investigation parameters included reactions of periimplant tissue and the structural integrity of the all-ceramic superstructures on the implants after three years of functioning. Method: Forty impl...

Objective: The purpose of this in-vitro study was to evaluate the fracture resistance of adhesively luted or conventionally cemented monolithic posterior single crowns made from zirconia (ZI), lithium disilicate (LS2) or feldspar ceramic (FC). Method: Five groups (n=10) of single crowns representing a first upper molar were fabricated in anat...

Objective: The purpose of this in-vitrostudy was to evaluate the influence of the superstructure-geometry on the fracture behaviour of zirconia abutments (Compartis, Degudent, Hanau, Germany) with a conical implant-abutment-connection (Ankylos C, Dentsply Implants Manufacturing GmbH, Germany). Method: Four different groups (n=8) representing...

Tooth material surface chemical and micromechanical properties are important for success and sustainability in restorative dentistry. Modification by cold atmospheric plasma jet treatment may help to improve presently existing shortcomings as a part of future restorative therapies. The present study has been focused on changes of surface properties...

Objectives: The study aimed at investigating the influence of plasma pre-treatment (PT) and incorporation of 4-META in a conditioning liquid on the shear-bond strength (SBS) to zirconia dioxide. Methods: Sixty-four zirconia blocks were embedded and wet ground. The surfaces were either exposed to atmospheric plasma or remained untreated (n=32). Su...

Introduction: Biofilms on dental implants play an important role in the genesis of inflammatory periimplant disease. Decontamination of microstructured titanium (mTi) is still a challenge for the dental practitioner. Cold atmospheric plasma jets offer disinfecting capabilities at biologically acceptable temperatures. This experimental study investi...

Objectives: The objective of this in vitro study was to investigate the behavior of different composite restorative materials under the load of cast circumferential clasps for removable dental prostheses (RDPs). Methods: In 60 human molars, standardized mesial-occlusal-distal cavities were prepared. The cavities were restored with the following...

The purpose of this study is to compare success rates of dual-viscosity impressions for two types of mixing techniques of the polyether elastomeric impression material. Additionally, influencing parameters on the success rates should be evaluated. The expectation was that there would be no difference between the success rates for the two mixing tec...

The aim of the study was to evaluate the influence of artificial aging on the fracture behavior of straight and angulated zirconia implant abutments (ZirDesign™; Astra Tech, Mölndal, Sweden) supporting anterior single crowns (SCs). Four different test groups (n = 8) representing anterior SCs were prepared. Groups 1 and 2 simulated a clinical situat...

OBJECTIVES: The aim of the study was to test whether abutments made of zirconium-dioxide are suitable for single-tooth replacement in the posterior region. Investigation parameters included reactions of periimplant tissue and the structural integrity of the all-ceramic superstructures on the implants after 24 months of functioning. METHODS: Forty...

The aim of the study was to evaluate the influence of fatigue and cementation mode on the fracture behaviour of endodontically treated bovine incisors restored with fiber-reinforced-composite (FRC) posts and crowns. Forty-eight endodontically treated incisors were restored with FRC posts, composite build-ups, and cast crowns. In 16 teeth, each of t...

This in vitro study investigated the fracture behaviour of implant-implant-supported and implant-tooth-supported all-ceramic fixed dental prostheses (FDP) using zirconium dioxide implant abutments (FRIADENT® CERCON® abutments, DENTSPLY Friadent). Six different test groups (n = 8) were prepared. Groups 1, 2, 4, and 5 represented an implant-implant-s...

Vollkeramische Rekonstruktionen basierend auf Oxidkeramiken haben nahezu alle Indikationsklassen der zahngetragenen festsitzenden Prothetik erobert. Stiftaufbauten, Einzelkronen und Brücken im Front- und Seitenzahnbereich stehen aufgrund ihrer ästhetischen und biologischen Eigenschaften in Konkurrenz zu den etablierten und bewährten metallgestützen...

The aim of the study was to evaluate the influence of artificial aging on the fracture behavior of straight and angulated zirconia implant abutments used in ZirDesign (Astra Tech) implant/tooth-supported fixed partial dentures (FPDs) in the maxilla. Four different test groups (n = 8) representing anterior implant/tooth-supported FPDs were prepared....

Aim: In the present study, prefabricated abutments made of zirconium dioxide Y-TZP (tetragonal zirconia polycrystals) were inserted into the posterior region under controlled clinical conditions. The aim was to test whether abutments made of zirconium dioxide are suitable for this indication. Investigation parameters included reactions of peri-imp...

Prefabricated implant abutments made of zirconium dioxide (yttria-stabilized polycrystalline tetragonal zirconia; Y-TZP) have proved to be useful in the esthetically demanding anterior region and may also be useful for premolar and molar replacement because of their obvious positive impact on the health of peri-implant soft tissues. Forty screw imp...

The objective of this study was to compare the shear bond strength to zirconium oxide ceramic of adhesive-phosphate-monomer-containing (APM) and non-APM-containing (nAPM) luting cements after different surface treatments. nAPM cements: Bifix QM, Dual Cement, Duo Cement Plus, Multilink Automix, ParaCem Universal DC, PermaCem Smartmix, RelyX ARC, Var...

To evaluate the survival of glass fiber reinforced composite post (GFP) restorations and to identify risk factors for restoration failure. GFPs of three consecutively placed post systems, two tapered and one parallel-sided, were adhesively luted and the core was built with a resin composite. Teeth served as abutment teeth according to the prostheti...

The aim of the study was to evaluate the influence of fatigue and cementation mode on the fracture behavior of endodontically treated bovine incisors restored with zirconium dioxide posts and crowns. Forty-eight endodontically treated bovine primary incisors were restored with zirconium dioxide posts (Cerapost, Brasseler), composite build-ups, and...

The aim of the study was to evaluate the influence of different posts on the fracture load and fracture mode of endodontically treated premolars with class II cavities and direct composite restorations in an ex vivo setting. Forty-eight single-rooted human premolars were endodontically treated and prepared with standardized MO (mesio-occlusal) cavi...

The aim of the study was to evaluate the influence of different posts and types of cementation on the fracture load and fracture mode of crowned, endodontically treated premolars with class II cavities in an ex vivo setting. Forty-eight single-rooted human premolars were endodontically treated and prepared with standardized MO (mesio-occlusal) cavi...

Due to the great variety of maxillectomy defects standardized restorative treatment protocols are rarely documented. For the practitioner it is from highest importance to consider the specific defect morphology and, even more important, the individual needs of affected patients. The presented case shows the planning and realization of the restorati...

The prosthetic rehabilitation of edentulous patients following hemimaxillectomy proves to be functionally unsatisfactory in many cases because of a heavily changed oral morphology and oral communication with the nasal and maxillary sinus cavities, which makes it difficult to achieve a sufficient retention and stability of the restoration using a co...

Adhesive resin cements are commonly used to lute all-ceramic posts despite limited scientific data on the clinical effectiveness of using bonding agents within prepared root canals. The purpose of this study was to retrospectively evaluate the clinical performance of conventionally cemented zirconia posts. Loss of retention, fracture of posts, and...