Fogorvosi szemle, 2006 (99. évfolyam, 1-6. szám)
2006-04-01 / 2. szám
FOGORVOSI SZEMLE ■ 99. évf. 2. sz. 2006. 81 According to the data of clinical performances and prognosis, immediate loaded implants are comparable to the traditionally inserted implants. DR. P. VÁLYI, K. DANYI, J. HALÁSZ,1 ZS. SCHAFF,1 DR. A. FAZEKAS, DR. K. BÖGI University of Szeged, Department of Dentistry and Oral Surgery, Szeged;1 Semmelweis University, 2nd Department of Pathology, Budapest ROLE OF THE TIGHT-JUNCTION ASSOCIATED OCCLUDINS IN MAINTAINING PERIODONTAL HEALTH Objective: Periodontists used to consider the epithelium as a passive covering and mechanical protecting tissue. Results of surveys suggest that the periodontal epithelia has an active role both in maintaining periodontal health and initiating diseases. The aim of the study was to determine the expression and localization of occludin in healthy and damaged human gingiva. Patients and methods: Gingival samples were obtained from five healthy, young (between 20-25 years of age) patients with good oral hygiene prior to surgical removal of impacted mandibular third molars. To exclude presence of inflammation formalin fixed, paraffin embedded sections were histologically evaluated and subsequently analyzed for occludin expression by immunohistochemistry. Results: Occludin exhibited the strongest and most extended expression in the basal cell layers, which are morphologically and structurally most similar to the junctional epithelial cells. Conclusion: Cells of the junctional epithelium are morphologically and structurally most similar to the basal cells in the stratified oral epithelium. In the normal human gingiva, occludin expressed in the basal cell layer suggest the occludin expressed in the junctional epithelium, and may play a role in the regulation of paracellular permeability and transepithelial migration of Neutrophils. DR. P. VARGA Dr. Horváth Csaba & Dr. Varga Péter Dentalpraxis Ltd. Szombathely / Bükfürdő PLACE OF BONE SPLITTING OPERATIONS IN IMPLANTOLOGY - PRACTICAL EVALUATION Introduction: In dental implantology thin alveolar bone often impedes or sometimes may as well make it impossible to implant a dental implant into the jaws. The presented operation technique can be beneficial by thickening the bone. Using a slightly different way than in everyday augmentation practice, the operation helps to reach the intended effect. A bone split, thicken and healed suitably does not differ in any feature from a healthy bone. In case of splitting, in contradiction to certain other techniques, we can rely on scanty resorbtion and better prognosis. Naturally the above-mentioned can only be reached properly by adhering to the general rules and to the special ones of bone splitting, and by defining the indicational area precisely. The ossified implants may carry fixed or removable prosthesis. As healed bones and implants do not differ from non-split bones in behaviour or characteristics at all, only the general norms of dentistry must be taken into consideration when planning the final dental rehabilitation. The operation technique of bone splitting would be presented in the lecture through cases with theoretical support. Material and method: The thin alveolar bone is cut between the two corticals, and the desired thickness is reached by careful expansion. Next the implant is inserted. The bone-cavities formed during the process are filled with augmentation material and then covered with absorbable membranes. Sometimes the membrane must be fixed by a membrane pin (that may be absorbable), or with the help of another method. DR. A. VÉGH, DR. G. BORSOS Heim Pál Children’s Hospital, Department of Orofacial Orthopedics and Orthodontics, Budapest INSERTION METHODOLOGY OF DISTALLY POSITIONED PALATAL IMPLANTS IN ADOLESCENTS APPLIED FOR THE CLINICAL PARCTICE Introduction: Bioengineering and nano-technological research on osseointegration of palatal implants (PI) led to success in stability of implants, despite the relatively small endosseal
