Sebastian Kühl

University of Basel | UNIBAS · University Center for Dental Medicine

Objectives Nano-modified surfaces for dental implants may improve gingival fibroblast adhesion and antibacterial characteristics through cell-surface interactions. The present study investigated how a nanocavity titanium surface impacts the viability and adhesion of human gingival fibroblasts (HGF-1) and compared its response to Porphyromonas gingi...

The purpose of this ex vivo study was to determine the accuracy of template-based guided endodontics for access cavity preparation and root canal detection in posterior teeth. First, three maxillary and four mandibular models were constructed using 67 premolars and molars, with a total number of 135 main root canals. Cone beam computed tomography (...

Purpose: To investigate the accuracy of a miniaturized dynamic navigation system with intraoral markers and two different workflows for dental implantation and to compare with static computer assisted implant surgery (sCAIS) surgery. Materials and methods: Two operators performed a total of 270 implant insertions in polyurethane mandibular model...

Die konkrete Situation im zahnärztlichen Notfalldienst ist häufig etwas anders, als im zahnärztlichen Praxisalltag. Gerade am Abend oder am Wochenende ist das Praxispersonal in der Regel begrenzt, wodurch das mögliche Therapiespektrum reduziert sein kann. Das vorliegende Buch beschäftigt sich mit vielen Details, die nur bzw. insbesondere den zahnä...

Surface patterning of bio-compatible titanium (Ti) shows a growing interest in the medical field. The engineering of material surfaces can achieve bactericidal properties and osteointegration improvements in order to develop medical implants. Spikes-like surface morphologies have already demonstrated the development of promising bactericidal proper...

Atraumatische Extraktionsmethoden gelten als wichtiges Verfahren, um den Verlust des Alveolarknochens nach der Zahnextraktion zu reduzieren und um die nachfolgende Implantatversorgung zu vereinfachen sowie optimale ästhetische Ergebnisse zu erzielen. Da es bereits unter physiologischen Bedingungen zu Resorptionen vor allem der bukkalen Wand kommt,...

Nach dem „Kleinen 1 x 1 der Oralchirurgie“ gibt es nun auch das perfekte Buch für oralchirurgisch fortgeschrittene Kolleginnen und Kollegen, die in ihrer Praxis häufiger oralchirurgische Eingriffe durchführen und sich updaten oder weiterentwickeln möchten, aber auch für (angehende) Fachzahnärztinnen und Fachzahnärzte für Oralchirurgie oder (angehen...

Background/aim: Evidence on the risk of injury at concerts is scant. The aim of this study was to collect data on general and dental injuries incurred by concertgoers in Switzerland and to investigate whether the frequency of accidents was related to music genre, gender and consumption of alcohol. Materials and methods: A questionnaire-based, cr...

Praktische oralchirurgische Fähigkeiten – von der Zahnentfernung über die plastische Deckung bis hin zur operativen Zahnentfernung, der zahnerhaltenden Chirurgie, der Weichgewebschirurgie und der Implantatchirurgie – kommen im Zahnmedizinstudium oft zu kurz bzw. werden erst postgradual vermittelt. Genau diese Fähigkeiten, sozusagen das kleine 1 x 1...

Nach dem „Kleinen 1 x 1 der Oralchirurgie“ gibt es nun auch das perfekte Buch für oralchirurgisch fortgeschrittene Kolleginnen und Kollegen, die in ihrer Praxis häufiger oralchirurgische Eingriffe durchführen und sich updaten oder weiterentwickeln möchten, aber auch für (angehende) Fachzahnärztinnen und Fachzahnärzte für Oralchirurgie oder (angehen...

Although titanium has been traditionally used as the gold standard for dental implants, recent years have seen the widespread application of zirconia implants given their superiority with regards to reduced bacterial adhesion, inflammation and cellular-interaction in terms of bio-compatibility. The JAK–STAT signaling pathway plays an important role...

Objective: The aim of this study was to evaluate functional and esthetic clinical outcomes and patient satisfaction with narrow-diameter implants in comparison to standard-diameter implants in the anterior zone of the maxilla in a follow-up examination after 1 to 6 years. Method and materials: The study was designed as a retrospective cohort stu...

Aim(s): The aim of the study was to fabricate a nanospike surface on a titanium alloy surface using a newly established method of low-energy helium ion bombardment. Various methods to achieve nanospike formation on titanium have been introduced recently, and their antibacterial properties have been mainly investigated with respect to Escherichia c...

This case series retrospectively investigated the one-year surgical outcome of regenerative peri-implantitis therapy using a hydroxyapatite (HA) bone substitute material in combination with enamel matrix derivate (EMD) and collagen membrane for guided bone regeneration (GBR). Data-sheets of patients were screened to detect patients who received ide...

Objectives: The transgingival part of titanium implants is either machined or polished. Cell-surface interactions as a result of nano-modified surfaces could help gingival fibroblast adhesion and support antibacterial properties by means of the physico-mechanical aspects of the surfaces. The aim of the present study was to determine how a nanocavi...

This study evaluates the accuracy of drill guides fabricated in medical-grade, biocompat-ible materials for static, computer-aided implant surgery (sCAIS). The virtually planned drill guides of ten completed patient cases were printed (n = 40) using professional (Material Jetting (MJ)) and consumer-level three-dimensional (3D) printing technologies...

Introduction This study aimed to evaluate substance loss and time required for access cavity preparation (ACP) by the conventional freehand method (CONV) versus a miniaturized dynamic navigation system of real-time guided endodontics (RTGE) in an in-vitro model utilizing 3D printed teeth. Methods Nine human anterior maxillary teeth were selected a...

Von obsolet in der Kariesdiagnostik bis obligat bei der Herdabklärung vor Strahlentherapie – die Einsatzhäufigkeit der DVT in der Abklärung pathologischer Veränderungen an Zähnen variiert sehr stark. Unerwarteterweise wird die DVT nicht nur diagnostisch, sondern auch zu therapeutischen Maßnahmen an Zähnen eingesetzt. Das topmoderne Thema der Guided...

Purpose: The aim of this in vitro study was to evaluate the temperature development of a novel, electropolished drill design during conventional and guided implant osteotomy in comparison to conventional drills under standardized conditions. Materials and methods: Single and sequential 12-mm-deep drilling protocols (guided and unguided) with a c...

Introduction This proof-of-principle study aimed to demonstrate that magnetic resonance imaging (MRI) is sufficiently accurate for the detection of root canals using guided endodontics. Methods One hundred extracted human teeth (anterior and premolar) were mounted onto five mandibular and five maxillary models, fitted with splints designed to acco...

Objectives Thermal and mechanical stresses during osteotomy preparation can impair implant osseointegration. This study investigated implant osseointegration following the measurement of temperature exposure during osteotomy drilling, varying drill design, sequence and drill wear. Materials and methods 36 tapered implants were placed in a mandibul...

Confrontations between police officers and citizens have become almost commonplace in today's world. The propensity for violence towards police officers is an ongoing topic. Statistics show a clear increase in violent crimes of this nature. The aim of the present study was to evaluate police officers' risk of injury including orofacial involvement...

Background/Aim Skiing is a sport with a medium risk of injuries, and injuries are increasingly common among professional alpine skiers. Examples of other medium‐risk sports are for example handball, basketball, and karate. The aim of this study was to assess the frequency of dental trauma in professional alpine skiing and to determine whether the f...

Antibiotics can be used in oral surgery. The effective benefits are offset by the dangers of resistance and sensitization, which requires a strict indication. There are controversial views regarding indication, dosage and, above all, duration and timing of antibiotic medication in oral surgery.

Antibiotics can be used in oral surgery. The effective benefits are offset by the dangers of resistance and sensitization, which requires a strict indication. There are controversial views regarding indication, dosage and, above all, duration and timing of antibiotic medication in oral surgery.

Praktische oralchirurgische Fähigkeiten – von der Zahnentfernung über die plastische Deckung bis hin zur operativen Zahnentfernung, der zahnerhaltenden Chirurgie, der Weichgewebschirurgie und der Implantatchirurgie – kommen im Zahnmedizinstudium oft zu kurz bzw. werden erst postgradual vermittelt. Genau diese Fähigkeiten, sozusagen das kleine 1 x 1...

A status report of dental implantology in Switzerland has already been performed in 1994 and 2006. The present study, based on these former surveys, aimed to update these results for the year 2016. To this end, a questionnaire was sent to all dentists in Switzerland who were members of the Swiss Dental Society (SSO) at the time of the survey. The q...

Objectives: To compare the stability of a screw-retained connection in a novel two-piece zirconia implant to a conventional titanium-based connection in an in vitro chewing simulation including artificial aging. Material and methods: Incisor (I) and molar (M) shaped monolithic zirconia crowns were screw-retained on either two-piece zirconia (tes...

Background/aims: Judo is a popular martial art with a high risk of injury. Notwithstanding this risk, mouthguards were not allowed until June 2018. The aim of this study was to measure the prevalence of traumatic injuries in judo with a particular focus on dental and lip injuries. A further aim was to assess the influences of increased overjet and...

Purpose: The purpose of this study was to evaluate whether fully digitally guided implant surgery may be performed with sufficient accuracy based on printing virtually designed templates after matching a surface scan with the magnetic resonance imaging (MRI) dataset mimicking edentulous cases based on cadaver maxillae of pigs. Materials and metho...

Introduction: The aim of this in vitro study was to compare endodontic access cavities in teeth with calcified root canals prepared with the conventional technique and a guided endodontics approach regarding the detection of root canals, substance loss, and treatment duration. Methods: Six identical sets of upper and lower jaw models were produc...

Objectives The aim of this in vitro study was to compare the heat generation during guided osteotomy preparation (GOP) with that of a conventional approach (CA) for a single and sequential drilling protocol. Methods Temperature measurements were performed during standardized osteotomy preparations in polyurethane foam blocks with an infrared camer...

Objectives: Maxillary sinus augmentation (MSA) is a successful and predictable intervention with low complication rates. Perforations of the Schneiderian membrane may occur impairing the general success. The aim of this study was to compare the incidence of membrane perforations between conventional rotating instruments and piezoelectric devices i...

Objective To systematically evaluate the scientific literature for patient‐reported outcome measures (PROMs) in static computer‐aided implant surgery (s‐CAIS). Methods A PICO strategy was executed using an electronic (MEDLINE, EMBASE, CENTRAL), plus manual search up to 15‐06‐2017 focusing on clinical studies investigating s‐CAIS with regard to pat...

Objectives Working Group 5 was assigned the task to review the current knowledge in the area of digital technologies. Focused questions on accuracy of linear measurements when using CBCT, digital vs. conventional implant planning, using digital vs. conventional impressions and assessing the accuracy of static computer‐aided implant surgery (s‐CAIS)...

Endodontie 2018;27(3):239–245 Die endodontische Behandlung von Zähnen mit obliterierten Wurzelkanälen und Parodontitis apica- lis stellt oft eine Herausforderung für Generalisten und Spezialisten dar. Ein hoher Zeitaufwand für die Wurzelkanalsuche und das erhöhte Risiko einer Perforation können die endodontische Therapie verkomplizieren. Mithilfe...

Objective: This study aimed to evaluate the effect of different ambient light levels on observer detection of small contrast differences in a contrast phantom by using a high-end liquid crystal display (LCD) monitor. Study design: An aluminum step wedge was converted into a contrast phantom by the addition of bore holes. Radiographic images of t...

In the hectic daily life, spending our leisure time outdoor in the mountains becomes more and more popular. Although information describing dental injuries in various sports is available, data specifically on dental trauma and other dental problems in alpine sports are lacking. Data of 1,128 alpinists were generated by using a standardized question...

Background/Aim Accurate removal of composite bonded titanium trauma splints (TTS) can be challenging. The aim of this study was to evaluate a Fluorescence‐aided Identification Technique (FIT) compared with a conventional light source (CT) for removal of trauma splints regarding loss of tooth substance, residual composite, and time taken. Materials...

Purpose: To evaluate whether removing a fractured abutment screw with a specific rescue device negatively affects the success of a new restoration in terms of early abutment loosening. Materials and methods: Implants (n = 10) with a regular platform of 4.1 mm (tissue level [TL]) and implants (n = 10) with a reduced diameter of 3.3 mm (bone level...

Purpose: To compare the suitability of a fused filament fabrication (FFF) consumer 3D printer with a professional digital light processing (DLP) printer for the production of surgical templates for guided oral implant surgery. Materials and methods: Eight virtual templates were printed with two different 3D printers. These were optically scanned...

In order to insert implants of the optimal length into the posterior maxilla with vertical loss of alveolar bone, sinus floor elevation may be required. This treatment is well documented in the literature and represents a reliable procedure. Long-term success depends on careful patient selection, preoperative planning, choice of surgical technique,...

Vor oraler Rehabilitation durch implantatgetragenen Zahnersatz wird inzwischen regelhaft ein digitales Volumentomogramm (DVT) angefertigt, anhand dessen das Knochenangebot dreidimensional bewertet werden kann. Nach dem Konzept des „backward planning“ werden, ausgehend von der angestrebten Versorgung, die notwendigen präprothetischen Maßnahmen gezie...

Aim: To present a novel miniaturized and minimally invasive treatment approach for root canal localization in mandibular incisors with pulp canal calcification and apical periodontitis. Summary: A 51-year-old male patient presented with pain from his mandibular incisors. The patient had a history of severe dental trauma over 30 years ago. Both m...

Several properties of bio-inspired surfaces like chemical composition, surface topography, surface hydrophilicity and even surface charge could influence bacterial adhesion to implant materials. Therefore, a nanostructured surface is being investigated to avoid bacterial colonization by their physico-mechanical and chemical aspects. Both smooth and...

Introduction: The aim of this study was to assess the accuracy of guided endodontics in mandibular anterior teeth by using miniaturized instruments. This technique is designed to treat teeth with pulp canal calcifications and narrow roots by using a printed template that guides a bur to the calcified root canal. Methods: Sixty sound mandibular a...

Background/aim: There is an increased risk of orofacial injuries in swimming pool facilities. Nevertheless, only a few studies have addressed this issue. The aim of this study was to identify the frequency of lip and tooth injuries at public swimming pools in Austria. A further aim was to examine which gender and age groups were affected, where an...

The long-term prognosis of avulsed teeth primarily depends on the behavior at the scene of the accident. Lay people are not able to perform an immediate replantation. Therefore, particular significance belongs to the cellphysiologic storage of avulsed teeth. The aim of this pilot study was to evaluate whether cling film facilitates the survival of...

Objectives Angiogenesis and neovascularisation plays a crucial role for tumorigenesis and tumor progression in head and neck squamous cell carcinoma (HNSCC). The aim of our study was to investigate the neovascularization capacity by endothelial progenitor cells (EPC) in tumor patient as a possible predictor for tumor progression and tumor stage. Ma...

Objectives: To compare the deviation of different systems for Guided Implant Surgery (GIS) related to the specific tolerance between drills and sleeves. Material and methods: Four different systems for GIS and their appropriate sleeves were used: Camlog Guide (CG), Straumann Guided Surgery (SG), SIC Guide (SIG), and NobelGuide (NG). System-appro...

This report introduces guided endodontics, a new template-based treatment approach for teeth with pulp canal calcification that require root canal treatment. The available in vitro data and clinical experience demonstrate that the presented approach is a safe, clinically feasible method to locate root canals and prevent root perforation in teeth wi...

Handball has developed into a much faster and high-impact sport over the past few years because of rule changes. Fast sports with close body contact are especially prone to orofacial trauma. Handball belongs to a category of sports with medium risk for dental trauma. Even so, there is only little literature on this subject. The aim of this study wa...

Boxing involves a high risk of dental trauma due to the impact of enormous external forces against the head. Wearing a mouthguard is, therefore, mandatory. The aim of this study was to evaluate the prevalence of dental trauma as well as the utilization and quality of mouthguards in Swiss boxing clubs. In order to achieve this, data on the mouthguar...

Aim: Showjumping is one of the sporting activities with a high injury risk. Unpredictable behaviour of the horse, considerable speed and the height of the rider in the saddle make this sport to one of the most dangerous, with the highest risk of injury and the highest mortality rate per competitor. The aim of this study was to determine the freque...

Aim: To present a new treatment approach for teeth with pulp canal calcification (PCC) which require root canal treatment. Case: A 15-year-old male patient presented with pain of his upper right central incisor. The tooth showed signs of apical periodontitis. Due to PCC, location of the root canal was judged to be difficult and associated with a...

Objectives: Life-threatening bleeding may occur during implant placement. Purpose: The present review was conducted to evaluate the localization, the symptoms, and therapies of life-threatening bleedings associated with implant placement. Material and methods: A literature review including 590 articles was performed in PubMed, Medline, and Coc...

This study investigates the frequency of injuries, in particular dental injuries, among ski jumpers and Nordic combined athletes. It also examines the level of knowledge regarding tooth protection and tooth rescue boxes in this population. Of the 465 sportswomen and sportsmen who took part in the study, 230 (62.5%) of the 368 ski jumpers and 56 (56...

Karate is a martial art that carries a high trauma risk. Trauma-related Swiss and European karate data are currently unavailable. This survey seeks to increase knowledge of the incidence of traumatic facial and dental injuries, their emergency management, awareness of tooth rescue boxes, the use of mouthguards and their modifications. Interviews we...

Aim: To present a novel method utilizing 3D printed templates to gain guided access to root canals and to evaluate its accuracy in vitro. Methodology: Sixty extracted human teeth were placed into six upper jaw models. Preoperative CBCT scans were matched with intraoral scans using the coDiagnostix(TM) software. Access cavities, sleeves and templ...

Aim To present a novel method utilizing 3D printed templates to gain guided access to root canals and to evaluate its accuracy in vitro. Methodology Sixty extracted human teeth were placed into six maxillary jaw models. Preoperative CBCT scans were matched with intraoral scans using the coDiagnostixTM software. Access cavities, sleeves and template...

The study deals with fighting-related dental injuries sustained by hooligans and the influence of wearing a mouthguard on fighting-related dental trauma. From 2012 to 2013, standardized multiple-choice questionnaires were distributed via contacts in the hooligan scene in Switzerland. The survey was conducted with the guarantee of complete anonymity...

Antiresorptive Medikamente werden schon seit vielen Jahren eingesetzt. Die mit ihnen verbundenen möglichen Komplikationen, besonders die Osteonekrose des Kiefers, sind bekannt. Der Beitrag gibt einen Überblick über die Manifestation, Prävention, Prophylaxe, Einteilung und Therapie von medikamentenassoziierten Osteonekrosen des Kiefers.

Two- and three-dimensional radiographic techniques are available to determine peri-implantitis-related bone loss around dental implants. To compare the performance of detecting different peri-implant bone defects in intraoral radiography (IR), panoramic radiography (PR), Cone Beam Computer Tomography (CBCT) and Computer Tomography (CT). Six implant...

Reference elements are necessary to transfer a virtual planning into reality for guided implant placement. New systems allow matching optical scans with three-dimensional radiographic images. To test whether digitally designed three-dimensional printed templates (D-temp) fabricated by matching surface scans and cone beam computed tomography (CBCT)...

Objectives Sinus floor augmentation using transalveolar techniques is a successful and predictable procedure. The aim of the study was to compare the performance of conventional hand instruments using mallets and osteotomes with that of piezoelectric–hydrodynamic devices for maxillary sinus floor elevation.Material and methodsIn 17 undamaged cadave...

Tooth extraction is one of the most common procedures in oral surgery. According to the statistics of statutory German health insurances, almost 13 million teeth were extracted in Germany in 2012. Resorption of hard and soft tissue is a physiologic process that takes place after tooth extraction. Maintaining these tissues after tooth extraction can...

For the restoration of an anterior missing tooth, implant-supported single crowns (ISCs) or fixed dental prostheses (FDPs) are indicated, but it is not clear which type of restoration is more cost-effective. A self-selected trial was performed with 15 patients with ISCs and 11 with FDPs. Patient preferences were recorded with visual analog scales b...

The aim of this pilot study was to analyze the interfurcal bone height in relation to the possible need for subsequent sinus floor elevation in patients with advanced periodontitis and furcation involvement of first and/or second maxillary molars. Seventeen dentate patients, who received cone beam computed tomography (CBCT) for detailed preoperativ...

More than 50% of all European children suffer a dental injury (DI), for which the emergency treatment is usually carried out by a general dentist. The aim of this survey was to assess the management of avulsions in Switzerland as the common treatment procedures used by Swiss dentists in such cases. As yet there are no published data on the treatmen...

Printing of templates for guided surgery represents an alternative to laboratory manufactured templates. To determine the technical accuracy of a virtually designed and printed surgical template for guided implant surgery based on a surface scan of a cast model using the coDiagnostiX(TM) software. Cast models and the virtual planning data of nine p...

Many character traits are influenced by birth order with greatest differences between first and lastborns. To investigate the influence of birth order on the risk of dental trauma. Five hundred mothers in Switzerland were interviewed personally regarding dental trauma in their children. Inclusion criteria were a family size of at least two children...

Objectives: Skiing and snow-boarding are winter sports with risk of dental trauma. The aim of the present study was to investigate the use of protective gear and the occurrence of dental trauma in amateur winter sports on ski slopes. Materials and methods: A total of 500 skiers and snowboarders (345 skiers, 110 snow-boarders, and 45 who rode bot...

Background It is unknown whether autogenous bone impacts the grafts' stability when added to biphasic calcium phosphate (BCP) within the first six months of maxillary sinus augmentation (MSA).PurposeTo investigate the volume stability of BCP alone and in mixtures with autogenous bone for MSA.Materials and Methods Bilateral maxillary sinus augmentat...

Wisdom tooth transplants offer youth the possibility of biologically fixed tooth replacement in cases of premolar agenesis or premature loss of a molar. In the present study, 57 transplants of third molars were reviewed and evaluated retrospectively on preoperative findings (root growth stages, extraction sites, indication for transplantation), on...

Objective: To evaluate the effect of patient- and tooth-related factors on the outcome of apical surgery in a multicenter study. Method and materials: A total of 281 teeth in 255 patients undergoing periradicular surgery were investigated clinically and radiographically 6 to 12 months postoperatively. Results: The overall success rate was 88.0...

Objectives The aim of the study was to investigate whether bone marrow aspirates (BMA) and concentrates (BMAC) influence the grafts' stability when added to deproteinized bovine bone mineral (DBBM) within the first 6months after maxillary sinus augmentation. Material and methods26 CT data of 13 patients undergoing bilateral maxillary sinus augmenta...