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The 6th EAO Consensus Conference 2021, EAO, online, 11 Feb 2021 - 12 Feb 2021; Clinical oral implants research 32(S21), 318-335 (2021). doi:10.1111/clr.13846 special issue: "Special Issue: The 6th EAO Consensus Conference 2021 /Edited by: Irena Sailer, Bj��rn Klinge, Henning Schliephake", Published by Wiley-Blackwell, Oxford

Augmentation of alveolar ridge defects is a technique-sensitive procedure in dental implantology. Depending on the size of the defect, it may be necessary to use autogenous bone blocks. However, patients may be against these blocks as these procedures are surgically invasive. CASE REPORT This report describes the restoration of a partially edentulous mandible, which suffered a major bone defect from the right canine to the third molar site after multiple implant losses. The use of a CAD/CAM allogeneic cancellous bone block from a living donor bone was planned for the reconstruction of the alveolar ridge at the defected site. A CBCT scan was taken and the virtual planning of the bone augmentation and placement of four implants was performed. The milled bone block was fixed for augmentation and the implants were placed using a CBCT-generated surgical guide. After osseointegration, a CAD/CAM-fabricated screw-retained metal-ceramic implant fixed partial denture with angulated screw channels was delivered. RESULTS The use of CAD/CAM-milled, allogeneic bone block resulted in a time-efficient and simplified reconstruction of the defect because no donor site was used, and the fit of the block on the native bone was uneventful and fast. At the 1-year follow-up, an average peri-implant vertical soft tissue decrease of 1 mm on buccal and 0.3 mm on lingual sites was observed and the peri-implant tissues were healthy. CONCLUSIONS The long-term success of this CAD/CAM cancellous bone block needs to be evaluated in well-designed clinical studies.

Clinical oral implants research 27(2), 174-195 (2016). doi:10.1111/clr.12531, Published by Wiley-Blackwell, Oxford

Einleitung: Ein iBook ist eine neue Form eines eBooks, welches die Vorzüge eines Lernprogrammes/eModuls (Wiedergabe multimedialer Inhalte, interaktive Widgets, Quiz etc.) mit Fachliteratur kombiniert. Eine Apple-Software für die Erstellung dieser neuen Medien ist seit 2012 erhältlich.[for full text, please go to the a.m. URL], Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA)

Um die Vernetzung vorklinischer und klinischer Lehre in der Zahnmedizin zu verbessern und damit den Lernerfolg zu steigern, wurde ein interdisziplinäres praktisches Seminar zum Thema "Muskelpalpation im Kopf- und Halsbereich“ eingeführt. Das Seminar wurde 2010 im Peer Teaching-Format[for full text, please go to the a.m. URL], Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA)

Einleitung: Ein gutes anatomisches Wissen ist eine wesentliche Grundlage für den zahnärztlichen Praxisalltag. In den vorklinischen anatomischen Kursen findet meistens keine bewusste curriculare Verknüpfung mit den klinischen Fächern im Sinne eines interdisziplinären Austausc[for full text, please go to the a.m. URL], Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA)

Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2022; Aachen : RWTH Aachen University 1 Online-Ressource : Illustrationen, Diagramme (2022). = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2022, The objective of this study was to investigate the efficacy of adjunctive therapy with a 445 nm diode laser in endodontic therapy as well as the potential harm that may be caused to the periodontal tissues due to excessive heat development. The experiments for this study were done on freshly extracted, human single-rooted teeth showing only straight root canals that were inoculated with E. faecalis. The first experimental series comprised 14 specimens and was divided into two parts. During the first part the specimens were irrigated with 2,65% sodium hypochlorite solution for a duration of 60 seconds, after that they were irradiated at 0.5 W for 55 seconds. For the second part, the same specimens were autoclaved and inoculated again prior to being irrigated with 2,65% sodium hypochlorite solution for 60 seconds. Then they were irradiated at 0.8 W for 55 seconds. The second experimental series comprised 17 specimens that were first irrigated with 2,65% sodium hypochlorite solution for a duration of 60 seconds and subsequently irradiated at 1 W. All specimens were autoclaved thereafter and inoculated just to be treated again but this time solely applying the diode laser. The rise in temperature on the root surfaces was simultaneously measured by thermography. The first part of the first experiment resulted in almost complete elimination of the bacteria after irrigation and subsequent irradiation (mean reduction: 97,63%). Comparable results were obtained in the second part of the experiment (mean reduction: 99,96%).In the second experiment almost no bacterial growth could be found after just the irrigation with sodium hypochlorite solution (mean reduction: 99,96%) whereas the subsequent irradiation resulted in a complete elimination of the bacteria (mean reduction: 100%). When applying the diode laser only, the reduction of the bacterial growth was incomplete (mean: 63,31). The temperature rises recorded during the laser application ranged from 15,19 K to 111,41 K (median: 41,67 K).The results of this in vitro study suggest that the antibacterial properties of a 445 nm diode laser can be considered an effective adjunct to common root canal treatment methods., Published by RWTH Aachen University, Aachen

Dissertation, Rheinisch-Westf��lische Technische Hochschule Aachen, 2021; Aachen : RWTH Aachen University 1 Online-Ressource : Illustrationen, Diagramme (2021). = Dissertation, Rheinisch-Westf��lische Technische Hochschule Aachen, 2021, BACKGROUND: Modern dental procedures are becoming more and more efficient. Aiming for a better tooth preservation, traditional endodontic treatments are being questioned and compared to new dental technologies. In recent years, a major focus has been layed on the root canal preparation. A variety of studies on new preparation techniques, concentrationg on an improved root canal debridement have been conducted. One of these new techniques, the laser-activated irrigation technique , was examined and discussed in the present study. AIM: The aim of the present study was to compare the efficacy of laser-activated irrigation with conventional irrigation method in root canal debridement. METHOD: The root canals of sixty extracted, single-rooted, human teeth were chemo-mechanically prepared using rotary files, up to size 30.09, and sodium hypochlorite (3% NaOCl). The teeth were divided into four groups of fifteen teeth each: (1) Er:YAG-Laser with lasertip located in the root canal (LAI), (2) Er:YAG-Laser with lasertip in the orifice using SWEEPS��-Mode (SWEEPS), (3) conventional irrigation with sodium hypochlorite (MI), and (4) control group without further treatment (C). The samples were prepared for histological investigation. Horizontal sections were cut 1mm, 3mm and 5mm away from the anatomical apex, followed by microscopic examination. The histology image analysis was done via computer software. The results were statistically evaluated using Mann-Whitney and Wilcoxon-test. RESULTS: Laser-activated irrigation removed more debris than conventional irrigation (LAI p0,05). The overall comparison showed a statistically-significant difference between both lasersystems (LAI to SWEEPS p0,05). At 3mm cutting height, the conventional irrigation showed significantly better results than SWEEPS�� (MI to SWEEPS p0,05). The worst outcomes among all tested methods were found in the apical region. None of the methods rendered the canal systems debris free. CONCLUSION: Laser-activated irrigation leads to superior canal cleanliness. Chemo-mechanical preparation of single-rooted teeth can be further improved by using LAI-lasertips. The conventional irrigation method had its best outcome at the location of the needle tip, therefore an apical insertion depth can be recommended. It can be concluded that the use of laser-activated irrigation advantageously affects endodontic treatments., Published by RWTH Aachen University, Aachen

Dissertation, Rheinisch-Westf��lische Technische Hochschule Aachen, 2021; Aachen 1 Online-Ressource : Illustrationen, Diagramme (2021). = Dissertation, Rheinisch-Westf��lische Technische Hochschule Aachen, 2021, Background: The question of the best root canal filling technique in everyday practice is of great interest, as the many different obturation options make it difficult for the practitioner to decide on the most effective choice of root canal filling technique. However, good root canal obturation is the basis of conservative dentistry. Surprisingly, the literature on this topic is controversial. With this information in mind, this paper is dedicated to evaluating the sealing ability of root canal filling with the cold lateral condensation and the single-point technique. These two types of obturation were chosen because they are still the most commonly used, especially in everyday practice, and are always regarded as direct competing techniques. Methods: For the study, 60 extracted human single-rooted anterior canals were chemo-mechanically prepared with ProTaper Gold instruments up to size F3. The teeth were then divided into four groups and obturated using the lateral condensation technique with taper .04 (group 1), the lateral condensation technique with taper .02 (group 2), the single-point technique with taper .04 (group 3), and the single-point technique with taper .02 (group 4). The sealer used was AH-Plus. Histological section preparation with subsequent microscopic evaluation was used as the examination method. Important parameters for evaluating the quality of the respective root filling techniques were determined and statistically analysed. These included the amount of gutta-percha-filled areas, sealer-filled areas, the total root canal filling proportion, leakage (as cavity formation and lateral gap formation) and residual tissue proportions. For statistical analysis, the Kruskal-Wallis test and Mann-Whitney test with sequential Bonferroni correction were used for the unconnected samples. For the connected samples, the Friedman test and Wilcoxon test were used. The statistical significance level was set at p, Published by Aachen

The aim of this study was to investigate, if there are differences shown in the appearance of the frontal teeth of people shown on magazine covers and a control group. Furthermore, it was investigated whether there are any differences in the outcome of different groups of journals. Therefore TV magazines, fashion magazines, women magazines as well as alternative magazines were selected for the study. Details of the smile were evaluated objectively by measuring of different aesthetic parameters and subjectively by the rating of laymen. The above mentioned four magazine groups consisted of 14 different magazines were selected. In each case the last 50 issues (source date July, 2009) were examined for usability. 140 magazine covers were selected by a total of 700 magazines. The 140 covers and 50 pictures of female students (control group) were measured according to the aesthetic aspects of a front tooth analysis. Furthermore, ten PowerPoint presentations were created, which included ten mouth and face sections of ten different facial photos. 266 laymen evaluated the images by visual analogue scale. The evaluations were carried out with a specially designed questionnaire. The objective measurement showed statistically significant differences when comparing the groups. The largest significances were found in tooth color, buccalcorridor size and in the distance of the incisal edges to the lower lip (p = 0.000). The subjective analysis, assessed by participants (laymen), again the different groups of magazines differed significantly from each other. Differences were also shown when comparing the different sized cut-outs. Far less significant differences were shown in the assessment of the facial cut-outs. This confirmes, that the aesthetic meaning of the teeth is reduced with increasing size of the cut-outs. Next the objective and subjective measurements were correlated: The measured values for the tooth size, tooth proportions, midline deviation and shade did not correlate with the assessment of the participants. The measured values for the buccalcorridor, the extent of gummysmiles and the extent of the smile line correlated with the subjective measurements. The smaller the buccalcorridor, the smaller the extent of gummysmiles and the greater the degree of smile line, the better the aesthetic rating.