Fogorvosi szemle, 2006 (99. évfolyam, 1-6. szám)
2006-12-01 / 6. szám
256 FOGORVOSI SZEMLE ■ 99. évf. 6. sz. 2006. EFFECT OF FLUORIDE CONTENT OF THE ORAL HYGIENIC PRODUCTS ON THE SURFACE STRUCTURE OF TITANIUM STÁJER, A.1, RADNAI, M.1, TURZÓ, K.\ PELSŐCZI, I. K.1, OSZKÓ, K.2, FAZEKAS, A.1 department of Dentistry and Oral Surgery, University of Szeged, Hungary; department of Solid-State and Radiochemistry, University of Szeged, Hungary Background: High fluoride concentration and the acidic pH in prophylactic mouthwash and gels used to prevent caries may modify the surface structure of implants or prosthetic appliances made of titanium. Oxidative agents are known to thicken and condense the titanium-dioxide layer on the surface of titanium, improving its corrosion resistance. Fluoride - like a reductive agent - may have an opposite effect and attack this layer. The aim of the present work was to study changes on the surface structure of titanium, caused by a fluoride containing solution, gel and mouthwash. Methods and Materials: Polished, commercially pure titanium CP grade 4 discs (9 mm in diameter and 2 mm in thickness, Camlog) were tested. Each sample was treated for 1 hour with one of the solutions: mouthwash containing 0.025 % fluoride, a gel containing 1.25 % fluoride and a solution of 1.0% NaF (pH 4.5). The surface structures were analyzed by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). Results: The roughness of the treated sample surfaces (Ra), as revealed by the AFM measurements, was increased significantly (2 times for the gel and 10 times for the 1% NaF solution) as compared to the control surface. No changes were detected in case of the mouthwash. The high fluoride concentration and acidic pH in the case of the gel and the 1% NaF solution resulted in a strong corrosion and a modification of the composition of the titanium surface. The XPS spectra revealed formation of fluoride containing complexes (NaF and Na2TiF6) bound strongly to the surface. Conclusions: The present study indicates that it is advisable to take the adverse effects of high fluoride concentration and low pH into consideration when applying prophylactic gels in case of patients having implants or orthodontic appliances made of titanium. References: 1. Bollen CML, Papaioannou W, Van Elderle J, Schep ers E, Quirynen M, Van Steenberghe D: The influence of abutment surface roughness on plaque accumulation and peri-implant mucositis. Clin Oral Impl Res 1996; 7: 201-211. 2. Huang H: Effects of fluoride concentration and elastic tensile strain on the corrosion resistance of commercially pure titanium. Biomaterials 2002; 23: 59-63. 3. Nakagawa M, Matsuya S, Udoh K: Corrosion behaviour of pure titanium and titanium alloys in fluoride-containing solutions. Dent Mat J 2001; 20(4): 305-314. DECREASE OF ANXIETY AND DENTAL FEAR IN THE WAITING-ROOM. A PILOT STUDY SZABÓ, ZS.1, ORBÁN, Á.SZ.1, MARKOVICS, E.2, MARKOVICS, P.3, FÁBIÁN, T.K.4, FEJÉRDY, P.4 11stván Báthory Theoretical High-School, Cluj-Napoca, Rumania; 2Clinic of Prosthetic Dentistry, University of Medicine and Pharmacy TG-Mure§, Rumania; 3Clinic of Oral and Maxillofacial Surgery, University of Medicine and Pharmacy TG-Mure§, Rumania; 4Clinic of Prosthetic Dentistry, Semmelweis University, Budapest, Hungary Aim: Authors compared several methods of mental hygiene (relaxing music, short stories on video, information posters) capable to decrease anxiety and dental fear in the waiting-room of a dental office. Materials and methods: 150 patients of two private dentists participated in this study (n=150; 71 female; 69 male, age 37.73 ± 11.63 years). Participants were divided into three groups, and either relaxing music or short stories on video, or information posters about anxiety and dental fear were used in the waiting-room. Anxiety (STAI-S) and dental fear (DFS) scores were measured at the beginning of the first and last visit. Dentists’ style of communication was also evaluated. Results: There were no significant difference between the groups related to gender, age, type and length of dental treatment. There was a significant decrease of anxiety and dental fear with the use of information posters only (p < 0.05). Scores also decreased but not at a significant level in the other groups. There was no significant difference related to the style of dentists’ communication between the groups. Conclusions: All metods investigated may be used to decrease anxiety and dental fear in the waiting-room of a dental office. Information posters related to anxiety and dental fear seems to be highly effective compared to the other methods. Communication of the dentists can be similarly skilled and effective, rather independently from the communication style. PRELIMINARY CLINICAL EXPERIENCES WITH A NEW ALVEOLUS PRESERVATION TECHNOLOGY - CASE REPORT SZILÁGYI, E.\ RUFFIEUX, K2, GÓCZÁN, J.3 department of Periodontology, Semmelweis University, Budapest, Hungary; degradable Solutions AG,