Tudományos közlemények

A kutatók eredményeiket tudományos közlemények formájában foglalják össze és hozzák nyilvánosságra. Karunk arra törekszik, hogy már tudományos diákköri szinten is olyan minőségű kutatómunka valósuljon meg, ami hazai és nemzetközi szinten is megállja a helyét. Az alábbiakban az utóbbi években diákköri kutatásokból született közlemények absztraktjait közöljük. A közlemények az SZTE felhasználói számára (a Klebelsberg Könyvtár elektronikus szolgáltatásának segítségével - http://ww2.bibl.u-szeged.hu/index.php/e-forrasok/folyoiratok-adatbazisok) online elérhetőek.

A TDK-hallgatók nevét a szerzőlistákban vastagon szedve jelöltük.

Short- and Long-Term Influence of Fluoride-Containing Prophylactics on the Growth of Streptococcus mutans on Titanium Surface

Barrak I, Urbán E, Turzó K, Nagy K, Braunitzer G, Stájer A.

Implant Dentistry. 2015 Jun 30.


Objectives: Acidic pH and high fluoride (F) concentration impair the corrosion resistance of titanium (Ti). Caries-preventive products contain high amounts of F and are applied at low pH. The purpose of this study was to evaluate whether fluoride applied in different forms has different short-, mid-,and long-term effects on the growth of the bacteria Streptococcus mutans.

Materials and methods: Ti discs with polished surface were treated with a rinse containing 0.025% olaflur, a gel containing 1.25% olaflur, or a 1% aqueous solution of NaF (pH 4.5), and they were incubated with S mutans for 21 days. Control discs did not get prophylactic treatment. Protein assay analysis was performed at regular intervals to estimate the amount of S mutans. Scanning electron microscopic (SEM) images were also taken.

Results: Bacterial protein quantity became significantly different only by the 21st day. Fluoride in rinse and gel proved to be superior to NaF in aqueous solution or no treatment (P < 0.01 and P < 0.05, respectively). However, the discs treated with fluoride in gel showed signs of corrosion in SEM images.

Conclusion: The results suggest that the use of fluoride-containing mouthwashes might be the best and safest oral hygienic choice for patients with oral implants. Furthermore, olaflur seems to be superior to NaF for long-term use at low pH.

Knowledge of the management of dental trauma in southern Hungary

Buzás K, Raskó Z, Braunitzer G, Piffkó J, Nagy K.

Fogorvosi Szemle. 2014 Dec;107(4):115-23

[Article in Hungarian]



The aim of the study was to evaluate the knowledge of dental trauma management in the southern part of Hungary among parents, teachers, medical doctors and dentists. A cross-sectional study was performed among the mentioned groups, with a structured questionnaire. The participants consisted of 275 people, most of them were parents (185), the other groups were smaller (30-30). 73.62% of parents recognised that the maxillary incisor of a 9-year-old girl is probably a permanent tooth. In case of the coronal fracture of this tooth 65.03% responded correctly. The correct response rate for the management of an avulsed tooth was only 39.26%, but in case of loss of consciousness 92.64% would act correctly. The Chi-square test indicated that there was a significant association between the correct recognition of the type of incisor and higher education (p < 0.01), and the number of seen TDIs. The 76.7% of the parents was not satisfied with his knowledge about TDLs, and 74.9% was interested in more information. In our study the parents performed generally better compared to other studies, but compared to the other three groups their results were worse. The knowledge of the teachers and the doctors was almost equivalent. The dentist had the best results. The level of knowledge of dental trauma management was inadequate among parents, but the teachers and doctors should improve their knowledge too. We suggest that it's necessary to start educational campaigns among groups that could be the primary caregivers of traumatic dental injuries.

In vitro fracture resistance of molar teeth restored with a short fibre-reinforced composite material

Fráter M, Forster A, Keresztúri M, Braunitzer G, Nagy K

Journal of Dentistry. 2014 Sep;42(9):1143-50


Objectives:The purpose of this in vitro study was to evaluate the efficiency of a short fibre-reinforced composite (SFRC) material compared to conventional composites when restoring class II. MOD cavities in molar teeth with different layering techniques.

Methods:One hundred and thirty mandibular third molars were divided into 5 groups (n=26). Except for the control group (intact teeth), in all other groups MOD cavities were prepared. The cavities were restored by either conventional composite with horizontal and oblique layering or by SFRC with horizontal and oblique layering. The specimens were submitted to static fracture toughness test. Fracture thresholds and fracture patterns were evaluated.

Results:In general, no statistically significant difference was found in fracture toughness between the study groups, except for horizontally layered conventional composite restorations, which turned out to be significantly weaker than controls. However, SFRC yielded noticeably higher fracture thresholds and only obliquely applied SFRC restorations exhibited favourable fracture patterns above chance level.

Conclusions:The application of SFRC did not lead to a statistically significant improvement of the fracture toughness of molar teeth with MOD cavities. Still, SFRC applied in oblique increments measurably reduces the chance of unrestorable fractures of molar teeth with class II MOD cavities.

Clinical significance:The restoration of severely weakened molar teeth with the use of SFRC combined with composite might have advantages over conventional composites alone. It was observed from the statistical data, that the application of SFRC with an oblique layering technique yielded not significantly but better fracture thresholds and more favourable fracture patterns than any other studied material/technique combination. Thus further investigations need to be carried out, to investigate the possible positive mechanical effects of SFRC. The application of the horizontal layering technique with conventional composite materials is inferior to the oblique technique and SFRC materials.







Rendezvénynaptár *