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Live surgery Surgical treatment of bone necrosis
Schultze-Mosgau, StefanOutline: - Surgical wound debridement - Sequestrotomy - Preparation of the soft-tissue bed - Plastic, tension-free, saliva-proof wound closure List of materials Basic surgical tool set: - Surgical blade - Preparation scissors - Pair of tweezers - Suture materials -
Esthetic and Restorative Dentistry - Ceramic Materials
Terry, Douglas A. -
REAL-TIME NAVIGATION: THE BEGINNING OF A NEW ERA IN GUIDED IMPLANT SURGERY
Objectives: To demonstrate that dynamic guided surgery is as predictable as conventional surgery. Methods: Partially edentulous patients requiring a fixed rehabilitation were selected for this pilot study. No specific contraindications were established, and smokers were not excluded. An impression was taken pre-operatively using an irreversible hydrocolloid (Cavex CA37®) to fabricate a diagnostic cast for moulding the surgical stent (NaviStent®). Afterwards, a standard cone-beam CT (CBCT) scan was made with the NaviStent® in place using a Planmeca Promax 3-D Max®. Images were converted into DICOM files and transformed into a 3-D virtual model using the Navident® software. The potential implant locations were planned in a prosthesis-driven way. For preparing the osteotomy, the drilling axis of the handpiece and the twist drills were calibrated. The osteotomies were prepared at low speed using a high level of cooling. The navigation software guided the drilling procedure in real time. Before installing implants, an extra calibration procedure was performed for tracking the implant. The aim of this pilot study was to determine the clinical outcome up to 12 months post-operatively for implants installed using the Navident® guided surgery system. Results: Partially edentulous men (n = 6) and women (n = 7) were included in this pilot study (mean age 52.15 years; range 20–75). Out of these 13 patients, two were current smokers of more than 10 cigarettes per day. Twenty implants were inserted. No mechanical or biological complications occurred during the surgical procedure, and no major complaints were reported, such as hemorrhage, sinus pathology or severe post-operative pain. No implants were lost up to 1 year after insertion, resulting in 100% implant survival. Conclusions: Based on the results of this pilot study, real-time navigation is a promising technique. However, there is not yet enough evidence to show that the method is as safe and predictable as conventional implant surgery. -
Covering a Recession with a Soft Tissue Transplant
Heinz, Bernd / Jepsen, SörenObjectives: Use of a soft tissue graft for recession coverage at tooth 23 and for gingival augmentation. Content: 1. Incision around tooth 23, intra-sulcular preparation, mobilization of coronal sliding flap, and pre-flap preparation. 2. Root smoothing, reduction of ground cavity with diamond burs from Perioset system. 3. Preparation and harvesting of connective tissue flap from palate, Emdogain application, and wound closure. 4. Placement of interrupted interdental sutures for fixation of connective tissue flap. -
Implantation with Simultaneous Augmentation
Grunder, UeliProcedure: - Case evaluation - Incision technique - Implant placement - Membrane adjustment and fixation - Introduction of replacement material - Flap mobilization - Suture technique Contents: Implantation was desired for replacement of a missing upper canine tooth and the adjacent lateral incisor tooth. The initial case evaluation revealed a relatively narrow gap between these two teeth in addition to extensive hard and soft-tissue defects. We selected an incision technique that made it possible to do the augmentation work yet subsequently achieve a tension-free flap closure. Since the bony defect was large while the available space was limited, we had to go for the best possible compromise in regard to implant insertion. After the implants had been inserted, augmentation was carried out using a non-absorbable, titanium-reinforced membrane, bone replacement material, and an absorbable membrane. Extreme flap mobilization was needed to achieve flap closure. An optimal suture technique was used to complete the surgery. -
Fiberglass frameworks in removable prosthodontics
Bücking, Wolfram -
Short and narrow implants, how far can we go?
Christoph Hämmerle, José NartIn this webinar moderated by Prof Ronald Jung and Dr. Adrián Guerrero the expert presenters Prof. Christoph Hämmerle and Dr. José Nart discuss about the importance and benefits of using short and narrow implants. -
Soft Tissue Management in the Aesthetic Zone
Daniel ThomaExpert presenter PD Dr. Daniel Thoma is a Head of Academic Unit at the Clinic for Fixed and Removable Prosthodontics and Dental Material Sciences, University of Zurich, Switzerland. Long-term successful outcomes with implant therapy are based on a number of parameters. Among these, the critical assessment of the peri-implant soft tissues and subsequent therapeutical interventions are considered key factors. -
Cell-to-Cell Communication - Inflammatory Reactions
Stadlinger, Bernd / Terheyden, HendrikVisualizing the invisible while experiencing a fascination with science is the great challenge that Cell-to-Cell Communication, representing an all-new genre, has set out to meet. A spectacularly sophisticated computer animation in HD quality depicts the highly complex processes of intercellular interaction during an inflammatory periodontal reaction complete with the messenger molecules implicated. The various cell types constitute the main cast of the film, using a finely tuned communication process in their quest to destroy the bacterial invaders, with messenger molecules as supporting cast. A stunning didactic and dramatic experience! Outline: - Biofilm - Gingivitis and the Innate Immune Defense - Periodontitis and the Adaptive Immune Defense - Cleaning and Regeneration -
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Bone Spreading, Bone Condensing
Streckbein, RolandContent: Surgical flap creation and elevation; Use of drill template for exact determination of implant position; Implant site creation; Site preparation / tapping; Bone compaction; Insertion of the implants; Impression-taking; Wound closure; Later implant insertion; Dental lab work; Creating the model with laboratory implants; Shaping the bar frame; Adapting the laser welded frame to the model; Manufacturing the tooth replacement, Fitting the bar into the tooth replacement; Finishing work. -
Periodontal Preserve Therapy (Examples)
Clotten, StefanContent: - Periodontal maintenance therapy for teeth 34 and 35, including the regeneration of a bone defect using bone replacement material, collagen membrane and sutures. - Curettage for treatment of periodontal pockets. - Treatment of gingival pressure sores caused by tight-fitting orthodontic apparatus. - Incision of buccal attachment to relieve gingival pressure for elimination of gingival recession. -
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Aesthetic upper anterior implant placement case
Dr. Dominik BüchiDr. Dominik Büchi performed a ridge preservation to keep the soft tissue volume. He then placed an implant 8 weeks later with simultaneous GBR. The final emergence profile was created by a fixed provisional crown. -
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Regenerative Behandlung multipler Rezessionen
Heinz, BerndGliederung - Befund - Schnittführung - Wurzelglättung - Applikation von PrefGel - Applikation von Emdogain - Periostschlitzung - Nahttechnik Inhalt: Regenerative Parodontalchirurgie mit dem Schmelz-Matrix-Protein Emdogain: Ziel der regenerativen Parodontalchirurgie ist der Wiederaufbau zerstörter parodontaler Strukturen. Eingesetzt wurden bislang und werden nach wie vor Knochentransplantate, Knochenersatzmaterialien sowie nicht resorbierbare und resorbierbare Membranen. Ein neuerer therapeutischer Ansatz zur parodontalen Regeneration ist die Wurzeloberflächenkonditionierung mit dem Schmelz-Matrix-Protein Emdogain (Biora, Schweden). Durch den Proteinkomplex wird die Neubildung von Wurzelzement stimuliert, was wiederum die Neubildung von Knochen und Kollagenfasern zur Folge hat. Zu diesem Verfahren und seiner Wirkungsweise wurden seit Anfang 1980 umfangreiche Untersuchungen und Studien von einem schwedischen Forscherteam um Prof. Lars Hammerström durchgeführt. Mittlerweile wird das Schmelz-Matrix-Protein Emdogain zur Behandlung von vertikalen Knochendefekten und von Furkationserkrankungen eingesetzt. Die freigelegte Wurzeloberfläche wird zunächst sorgfältig mit Handinstrumenten oder rotierenden feinkörnigen Diamanten gescalet. Sodann wird die EDTA-Suspension Pref-Gel (Biora, Schweden) aufgetragen und nach zwei Minuten mit physiologischer Kochsalzlösung gründlich abgespült. Die EDTA-Suspension bewirkt die Entfernung des Smearlayers und öffnet die Dentintubuli, wodurch eine bessere Verbindung von Emdogain an die Wurzeloberfläche erreicht wird. Sofort anschließend wird Emdogain auf die blut- und speichelfreie Wurzeloberfläche appliziert. Danach erfolgt der Nahtverschluss. -
Surgical Treatment of Periodontitis Using a Minimally Invasive Approach
Beck, FrankThis case is an excellent demonstration of the use of the minimally invasive access flap technique for treatment of (chronic) periodontitis in an esthetically critical zone. The access flap was used in conjunction with enamel matrix proteins for regenerative therapy.,
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PERIOSTEAL PREFABRICATION OF VASCULARISED CAD/CAM BONE SCAFFOLDS
Objectives: Reconstruction and prosthetic rehabilitation of patients presenting with severely atrophied alveolar ridges or critical-size bone defects of the facial skeleton are clinically challenging. Bone tissue engineering with patient-specific scaffolds are a promising alternative for overcoming the drawbacks of autologous bone grafts. Early neovascularisation and reliable vertical bone height are both crucial for successful implantation, and present the major challenge of these constructs. The aim of this study was to evaluate the neovascularisation potential and bone-forming capacity of a CAD/CAM-designed artificial space (bioreactor) between the medial femur condyle and its periosteum on bioresorbable scaffold structures. Methods: Four skeletally mature Swiss alpine sheep were used. The bioreactor, composed of a PEEK construct (side walls), a vascular pedicle flap (roof) and deperiosted compacta (floor), was locked into position by two 2.4 standard screws. The sheep were put in two groups of two: in the treatment group, the created rectangular space was filled with a bioresorbable β-tricalcium phosphate (β-TCP) scaffold; in the other group, the bioreactor was left empty (negative control). Micro-CT scans were performed immediately and 12 weeks postoperatively. Fluorochrome labelling was performed with calcein green after 4 weeks, and with Xylenol orange after 8 weeks to document new bone formation. Animals were euthanised 12 weeks postoperatively and surgery sites were examined histologically using eosin–Giemsa with pre-mortal intravascular injection of Indian Ink to visualise blood vessels. Results: Fluorochrome labelling displayed moderate early bone formation after 4 weeks with already in-growth into the bioreactor. After 8 weeks, there was pronounced new bone formation in the bioreactor. After 12 weeks, eosin–Giemsa staining showed degradation and bony replacement of the scaffold material, bone in-growth into the scaffold voids, and extended neo-vascularisation into the scaffold originating from the periosteal flap. Micro-CT data showed that after 12 weeks of implantation, 45% of the region of interest (ROI) contained new vertical bone-like tissue composed of new bone and ossified scaffold material. The overall volume increase of bone-like tissue in the ROI was +9% and the calcification level increased by 30%. Conclusion: These results indicate that the bioreactor concept strongly promotes new bone formation, ossification and extended vascularisation of the scaffold material. The newly formed bone is highly calcified and thus of ideal quality for implantation purposes. -
Hemisektion und Trisektion nach der Carnevale-Technik
Hürzeler, Markus B.Gliederung: - Apikale Lappenreposition - Trisektion des oberen Molaren - Extraktion der distobukkalen Wurzel - Tangentialpräparation der Pfeiler - Unterfütterung des Provisoriums Inhalt: Furkationsbefallene Molaren zeigen im Vergleich zu einwurzeligen Zähnen eine geringere Langzeitprognose hinsichtlich des Zahnerhaltes auf. Neben dem Ersatz durch Implantate gibt es die therapeutische Möglichkeit, die Furkationsbereiche zu eliminieren und einwurzelige Verhältnisse durch Hemisektion oder Trisektion zu schaffen. Studien zur Langzeitstabilität zeigen ein sehr gemischtes Bild. Während einige Studien Misserfolge von 40% zeigten, konnte die Gruppe um G. Carnevale Daten mit Erfolgsraten von mehr als 90% innerhalb von 10 Jahren publizieren. Vorbehandlung: 6 bis 8 Wochen nach konservativer Parodontaltherapie erfolgte die initiale Präparation der Pfeilerzähne, die eine Furkationsbeteiligung Grad II-III aufwiesen. Die Präparation wurde tangential bis auf Knochenniveau durchgeführt, um möglichst wenig Zahnhartsubstanz zu opfern und alle Wurzelkonkavitäten zu eliminieren. Ein metallverstärktes Langzeitprovisorium diente zur Schienung. Daraufhin erfolgte die endodontische Versorgung. Chirurgischer Eingriff: Es erfolgte eine Apikalverschiebung der Gingiva im Bereich der betroffenen Zähne. Anschließend erfolgte die Präparation eines Mukosallappens auf der bukkalen und palatinalen Seite und die Trisektion. Nach Durchtrennung und Entfernung der distobukkalen Wurzel wurde die intraoperative Präparation der Pfeilerzähne durchgeführt. Ein wichtiger Schritt ist das Unterfüttern des Provisoriums, um die Wurzeln zu schienen und deren Einkippen zu verhindern. Weiterbehandlung: Abdrücke für die definitive Versorgung erfolgten 6 Monate postoperativ. Die Restaurationsränder der Tangentialpräparation wurden am Meistermodell festgelegt, die definitive Rekonstruktion weist fein auslaufende Metallränder auf. -
