Gyula Marada

Comparison of radiographic and electronical working length determination on palatal and mesio-buccal root canals of extracted upper molars

OBJECTIVE The objective of this work was to compare the accuracy of working length determination of ProPex (Dentsply-Maillefer) electronic apex locator (EAL) to the radiographic method on extracted molars. STUDY DESIGN Root canal length was determined using the electronic apex locator and conventional radiographic method. Digital radiographs were taken and the distance between the tip of the file and the radiographic apex was measured. Mann-Whitney and chi(2) tests were used for the statistical analysis. RESULTS The average distance between the tip of the file and the radiographic apex in the mesio-buccal canals was 0.46 mm with the radiologic method, and 0.23 mm with EAL, and 0.43 mm and 0.31 mm in the palatal canals, respectively. The difference at the mesio-buccal canals was significant (Mann-Whitney test P = .048). The number of overextensions was higher in the EAL group. CONCLUSION The desired position of the file achieved by the EAL proved to be more accurate in the mesio-buccal canals than with the radiologic method alone.

Impaired oral health-related quality of life in Hungary

Abstract Objectives. To describe the prevalence of impaired oral health-related quality of life (OHRQoL) in the adult Hungarian population and to determine population-based norms for three Hungarian versions of the Oral Health Impact Profile (OHIP-H). Material and methods. In a survey of 1059 randomly selected subjects, OHIP responses, age, gender, and denture status [natural dentition or fixed partial dentures (FPDs), removable partial dentures (RPDs), or complete dentures (CDs)] were collected. Study outcomes were item prevalence and OHIP summary score frequency (‘norms’). Results. The prevalence of OHIP items ranged from 2% to 43%, with a mean item prevalence of 14%. The distribution of summary scores was characterized by decile norms. Median scores for OHIP-H49, the 49-item questionnaire, were 6 OHIP units for subjects with FPDs, 10 OHIP units for subjects with RPDs, and 6 OHIP units for subjects with CDs. The median scores were 0, 0, and 1 OHIP units for the 14-item OHIP-H, and 0, 0, and 0 OHIP units for the five-item OHIP-H. Conclusions. Our sample demonstrates substantial OHRQoL impact in the Hungarian general population. The derived norms provide a framework for interpretation of data in future studies using the Hungarian OHIP versions, as well as data on how oral conditions and cultural factors affect perceived oral health when compared with international findings.

Sinusitis maxillaris mint a fogászati cone-beam komputertomográfiás vizsgálat melléklelete

INTRODUCTION: Cone-beam computed tomography is a frequently used diagnostical method in the head and neck region. The thickening of the maxillary sinus mucosa is often observed in these images. AIM: Determining the prevalence of teeth and roots that can be identified as cause of maxillary odontogenic sinusitis, and recording the average observed mucosa thickening on these images. METHOD: The scans that give the base of the study have been performed by the Department of Dentistry of Medical University of Pecs between 2015-2016. The size of the voxels had been varied between 0.25 and 0.4 mm and the size of the image had been set up to 15×12 cm. The acquisition time had been set up to 27 seconds. RESULTS: 170 cases of the 260 revised records fulfilled the initial criterion conditions. The average mucosa thickness was 8.8 mm. During the present study, the upper first molars palatal and the second molars mesiobuccal roots were mainly associated with maxillary odontogenic sinusitis. CONCLUSION: Whether in the case of chronic maxillary sinusitis that is not or only temporarily responsive to conventional therapy, may it be justifiable to provide dental consultation and cone-beam computed tomography to exclude the dental origin of sinusitis. Orv Hetil. 2017; 158(44): 1747-1753.

A fogászati ellátás finanszírozása Németországban, az Egyesült Királyságban, Magyarországon és Lengyelországban

Absztrakt Bevezetes: Az egeszsegugyi ellatasok kozul a fogaszati beavatkozasok szama a legmagasabb, es a finanszirozasa is jelentős kiadasokat jelent. Celkitűzes: A vizsgalat celja negy europai orszag egeszsegugyi rendszerenek osszehasonlitasa a kozossegi fogaszati ellatas oldalarol. Modszer: A fogaszati ellatasra forditott osszegek es modszerek osszehasonlitasanak alapjat az egeszsegbiztositok altal biztositott adatok kepeztek. A vizsgalatban a kovetkező indikatorokat ertekeltek: a kozossegi fogaszat aranyszamait es a legfontosabb, szajegeszseghez kapcsolodo indexeket. Az altalanos fogaszati ellatasok kozul a prevencios, konzervalo fogaszati, endodonciai es szajsebeszeti beavatkozasokat valasztottak. Eredmenyek: Az egy aktiv fogorvosra juto lakosok szama Nemetorszagban (1247 lakos/fogorvos) a legkedvezőbb, mig Magyarorszagon (2020 lakos/fogorvos) a legrosszabb. A szajegeszseghez kapcsolt indikatorok szignifikans kulonbseget mutatnak a nyugat- es kelet-europai orszagok kozott. Ezzel ellentetben a teljes f...

Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system.

Background The purpose of this study was to investigate the consistency of working length control between hand instrumentation in comparison to engine driven Mtwo nickel-titanium rotary files. Material and Methods Forty extracted maxillary molars were selected and divided onto two parallel groups. The working lengths of the mesiobuccal root canals were estimated. The teeth were fixed in a phantom head. The root canal preparation was carried out group 1 (n=20) with hand K-files, (VDW, Munich, Germany) and group 2 (n=20) with Mtwo instruments (VDW, Munich, Germany). Vestibulo-oral and mesio-distal directional x-ray images were taken before the preparation with #10 K-file, inserted into the mesiobuccal root canal to the working length, and after preparation with #25, #30 and #40 files. Working lenght changes were detected with measurements between the radiological apex and the instrument tips. Results In the Mtwo group a difference in the working competency (p<0.05) could be noticed only in the vestibulo-oral direction from #10 to #40 file. The hand instrument group showed a significant difference in working length competency for each larger file size (p<0.05) (ANOVA). Regression analysis in the hand instrumentation group indicated a working length decrease with a mean of 0,2 mm after each consecutive file size (p<0.01). Conclusions The outcome of our trial indicated a high consistency in working length control for root canal preparation under simulated clinical condition using Mtwo rotary files. Mtwo NiTi rotary file did therefore proved to be more accurate in comparison to the conventional hand instrumentation. Key words:Working length, Mtwo, nickel-titanium, hand preparation, engine driven preparation.

Chemomechanical preparation by hand instrumentation and by Mtwo engine-driven rotary files, an ex vivo study.

Objective: To compare the disinfecting efficacy of the sodium hypochlorite irrigation by root canal preparation with stainless steel hand files, taper 0.02 and nickel-titanium Mtwo files with taper 0.04-0.06. Study Design: 40 extracted human teeth were sterilized, and then inoculated with Enterococcus faecalis (ATCC 29212). After 6 day incubation time the root canals were prepared by hand with K-files (n=20) and by engine-driven Mtwo files (VDW, Munich, Germany) (n=20). Irrigation was carried out with 2.5% NaOCl in both cases. Samples were taken and determined in colony forming units (CFU) from the root canals before and after the preparation with instruments #25 and #35. Results: Significant reduction in bacterial count was determined after filing at both groups. The number of bacteria kept on decreasing with the extension of apical preparation diameter. There was no significant difference between the preparation sizes in the bacterial counts after hand or engine-driven instrumentation at the same apical size. Statistical analysis was carried out with Mann-Whitney test, paired t-test and independent sample t-test. Conclusions: Significant reduction in CFU was achieved after the root canal preparation completed with 2.5% NaOCl irrigation, both with stainless steel hand or nickel-titanium rotary files. The root canal remained slightly infected after chemo mechanical preparation in both groups. Key words:Chemomechanical preparation, root canal disinfection, nickel-titanium, conicity, greater taper, apical size.