Fogorvosi szemle, 2006 (99. évfolyam, 1-6. szám)
2006-04-01 / 2. szám
70 FOGORVOSI SZEMLE «99. évf. 2. sz. 2006. setting of the frequency, intensity and the time of impact might lead to severe lateral and periapical necrosis. A patient - referred to our out-patient service - had an acute symptom of serious gum and alveolar bone necrosis after having root canal treatment with a “radiosurgical” instrument. The tooth could have just been saved with a multi-step surgical treatment. Material and method: A 28-year-old female patient appeared at our department complaining of her tooth #12. She had had an “RCT with electricity" beforehand. A necrotized alveolar crest, complete lack of marginal gingiva, severe tooth mobility and an opened root canal was seen at the intraoral examination. Her general physical condition was absolutely correct and showed no sign of destructive periodontitis otherwise. Neither the X-ray nor her previous clinical history explained the indication for RCT. We started the treatment with wound cleaning and provisional Ca(OH)2 medication was placed in the root canal. Subsequently SRP and definitive root canal filling was performed. The tooth (mob. grade 2) was splinted with a glass fibre reinforced ribbon (Connect®, Kerr, Orange, CA, USA) utilizing adhesive technique. Hence a full thickness of mucoperiostal flap was elevated and after debridement the defect was filled with NBM (BioOss®, Geistlich, Wolhusen, Switzerland) and covered with barrier membrane (BioGide®, Geistlich, Wolhusen, Switzerland). Before suturing, a subepithelial connective tissue graft was transplanted to the site to augment the attached gingiva. Results: Both the clinical and the radiological parameters showed CAL gain at 6 months and one year controls. The temporary splint was removed at month 18 postsurgically. Conclusion: Certainly radiosurgery in dentistry has its well defined indications. It should be kept in mind that the inadequate selection of cases and uncontrolled instrument setting can lead to irreversible hard and soft tissue damages. The endodontic administration still needs further investigation. DR. Á. JOÓB-FANCSALY,1 DR. T. DIVINYI,1 DR. T. HUSZÁR,1 A. KARACS,2 DR. G. PETŐ2 1 Semmelweis University, Department of Oral and Maxillofacial Surgery;2 Hungarian Academy of Sciences, Thin Film Nanostructures Laboratory of the Research Institute for Technical Physics and Materials Science SURFACE CHARACTERISTICS OF DENTAL IMPLANTS SURFACE-TREATED WITH LASER Introduction: It is known that surface morphology influences the osseointegration of implants to a large extent. The goal of our studies was the in vitro examination of the effect of various surface treatments with LASER on the activity of bone and connective tissue cells. In our preliminary studies (animal experiments, EM, AFM and spectrophotometry and studies in cell cultures) the surfaces treated with LASER showed excellent results in a number of aspects compared to other surface structures. Material and method: NIH3T3 fibroblast and MCH3T3 osteoblast cells were introduced onto the surface of turned titanium disks (control group) and titanium disks surface treated with LASER in two ways, and placed in a 24-well culture plate. Cells were cultured on the surface of the disks for two days in a culture medium. One group of the disks was subjected to scanning electron microscopy and light microscopy and the changes in numbers and shape of the cells were studied in various magnifications. In the other group cells were solved from the surface of the disks and were counted in a Bürker’s chamber. After the cell count the cells were lysed in a lysis buffer and their protein concentrations were measured with a spectrophotometer. Results: The morphological and descriptive analysis of individual cells is possible with SEM. Upon cell counts and measuring protein concentration we got significantly different results on the three surfaces in the cases of the two groups of cells. With the preliminary tests in view this was not surprising. In fibroblast cultures disks with a LASER surface-treatment showed less remarkable results, while in the case of osteoblasts the activity of cells was clearly significant. ZS. KAPÁS,1 M. BENEDEK,2 G. BENEDEK3 1 KAZSO Dental Team;2 Benedent Kft.;3 Dentha Bt. ASPECTS OF INDIVIDUAL COMPLETION OF IMPLANT ABUTMENTS The material of the presentation shows the individual completion of abutments from the dental technicians’ point of view. We demonstrate the implant systems with structural buildup not secured against rotation yet, and their disadvantages compared to the possibilities provided by modem systems. The implant systems with structural buildup which is secured against rotation open new dimensions in the section of cemented bridges. The surgical guides made by the dental technician give a big hand in optimal placing of the implants; we also demonstrate the use and availability of these guides in our presentation. For the making of the prosthesis there are some crucial conditions which are to be ensured by the dentist - the realisation of these are demonstrated by some cases. Physical relationships between tapered buildup of the abutment and the fixation of the prosthesis are also demonstrated. Review is given of the requirements of integration of the prosthetic restoration in biological milieu, analysing hygenic aspects. We demonstrate cases about possible failures of impression taking and about avoiding them.
