Bernard Jankovic

University of Zagreb · School of Dental Medicine (SFZG)

Objective: The aim of this study was to examine the satisfaction of parents and caregivers of patients who underwent dental treatment in general anesthesia (GA) in a day-care surgery setting. Material and methods: Anonymous questionnaire was sent to parents/caregivers of patients who underwent full mouth restoration in GA. The survey consisted o...

Objective: To review the frequency and management of post-discharge complications in patients who underwent dental treatment in general anesthesia (GA) in a day-care surgery setting and identify the factors that increase the risk for these complications. Material and methods: Anonymous questionnaire was sent to parents/caregivers of patients who...

Aim: Data regarding different types of orthodontic brackets and ligation and various clinical and salivary findings are scarce. Therefore, the aim of this study was to compare clinical and salivary findings in patients with different types of fixed orthodontic appliances. Subjects and methods: Decayed, missing and filled teeth index (DMFT) and plaq...

Objective: To analyze data on full-mouth rehabilitation under general anesthesia (GA) performed at the University Clinical Hospital Zagreb with emphasis on patient characteristics, type of procedure and postoperative complications. Materials and methods: Retrospective chart review of 100 patients treated under GA at the Dental clinic's day care...

Objectives: It is known from the existing literature that metal ions within orthodontic appliances are prone to corrosion due to the salivary and bacterial interplay in the oral cavity. The results from the most studies show that levels of salivary nickel and chromium do not increase after the installment of orthodontic appliances. Material and met...

The setting processes in the commercial glass ionomer cement (Fuji IX Fast) and resin modified glass ionomer cement (Fuji II LC) were investigated by the dielectric spectroscopy. The changes in the real and imaginary parts of the dielectric permittivity [ε*(ω)] as well as dielectric loss (tan δ) with time for Fuji IX Fast show several distinct regi...

Objective: To investigate the change in electrical conductivity and mass of GIC samples with time of immersion in deionized water and to correlate the changes with different aging time under room conditions before immersion. Method: Impedance spectroscopy measurements were carried out on glass ionomer cements Fuji IX Fast, Ketac Molar and pho...

The setting process for dental glass ionomer cements (GICs) was studied by impedance spectroscopy in a fixed, 10 and 1000 Hz, and wide frequency region, from 0.01 Hz to 1 MHz. For comparison, the setting of the conventional GICs, Fuji IX Fast and Ketac Molar Aplicap, and “resin modified” GIC, Fuji II LC, was investigated. The effect of setting upon...

Objectives: The aim of this study was to monitor and compare the electrical conductivity during the setting reaction time of conventional and resin modified glass ionomer cements by impendance spectroscopy (IS) method. Methods: Two types of glass ionomer cements were used in this experiments: Fuji IX FAST (GC, Japan) and Fuji II LC (GC, Japan). T...

Dental composite resins (CRs) are commonly used materials for the replacement of hard dental tissues. Degree of conversion (DC) of CR measures the amount of the un-polymerized monomers in CR, which can cause adverse biological reactions and weakening of the mechanical properties. In the past, studies have determined the positive correlation of DC v...

Aim: The aim of this study was to determine the amount of aerobic, anaerobic, and total number of bacterial colonies after chemomechanical root canal treatment and after additional intracanal disinfection using ozone. Materials and Methods: Twenty - three patients with the same number of single rooted teeth (n=23) with periapical lesion (<5 mm) obs...

The aim of this study was to examine the effect of ozone gas on the remaining bacteria after chemomechanical instrumentation of tooth root canal. The study was carried out at the Department of Endodontics and Restorative dentistry, School of Dental Medicine, University of Zagreb. A total of 37 tooth root canals from 23 teeth (10 incisors, 2 canines...

Objectives: The aim of this study was to evaluate the surface and intrapulpal temperature variation after bleaching treatment with 25% hydrogen peroxide (ZOOM 2, Discus Dental, USA) using different light sources. Methods: A K-type thermocouple was used to measure the temperature increase in the pulp chamber while infrared termometer was used...

Objectives: Analysis of the impact of war and war time conditions to the status of the teeth by comparing the results of measurements carried out after the war (1997) and new measurements performed 14 years after the first survey (2011.). Methods: The study was performed in 2011. in Novi Travnik, Bosnia and Herzegovina, 14 years after the fir...

Objectives: The aim of this study was to evaluate the linear dimensional changes of conventional glass ionomer cements during setting time period. Methods: Digital laser interferometry method was used to measure linear changes during setting of Ketac Molar Aplicap (KM) (Espe), Ketac Molar Quick Aplicap (KMQ) (Espe), Fuji IX Extra (FIXE) (GC) and...

Objectives: The aim of this study was to determine increase in transillumination of composite posts after etching and treatment in cold H2 plasma. Methods: Initial spectrophotometric measurement was taken for each of 20 FRC Postec composites used (Ivoclar, Schaan, Liechtenstein). Each post was illuminated with LED lamp LUX.V ST. HEX LAMB. DENT-BL....

Objective: Photopolymerization unit is an essential part of every dental office. The intensity of light curing units gradually decreases with time and can lead to poor polymerization, which cannot be detected clinically immediately after illumination. The purpose of this study was to examine whether the intensity of light curing units in dental off...

Objectives: Physical stress and anaerobic training result in increased biting forces that in combination with increased intake of acidic drinks and agitation in the mouth may result in accelerated loss of hard tissue in the cervical region. The purpose of this study was to define the prevalence of non-carious cervical lesions among the athletes. Me...

Objective: The purpose of this in vivo study was to prove the efficiency of ozone therapy on the bacteria in root canal. Methods: Study was conducted on 37 root canals. Root canals were treated using step-back technique with 2.5 % sodium hypochlorite drainage. After completion of the chemomechanical treatment first swab was taken with a sterile pap...

OBJECTIVES: Analysis of the influence of social status on the dental status among nursing home residents in Zagreb, Croatia. METHODS: The research included 348 examinees, all of them being the users of the Zagreb homes for the old and disabled. Following elements of the social status were examined (level of education, monthly income, gender, age)...

Objectives: Due to their low viscosity, flowable composite resin materials can be used as shock absorbers of stress that can occur during polymerization shrinkage at the interface surface. The purpose of the study was to estimate incidence of cohesive fractures (KF) in composite fillings with and without using of flowable composite resins (FCR)....

The purpose of this paper was to determine the prevalence and impact of various etiological factors on marginal ridge fractures of teeth with amalgam fillings. 50 subjects participated in this research, 172 teeth restored with amalgam were examined out of which 28 premolars and 144 molars of both jaws. Data used in the research was obtained by nona...

Objectives: Intensity of light curing unit (LCU) plays an essential role in achieving good monomer conversion and thus reduces the risk of secondary caries and increases longevity of dental fillings. The intensity of light in LCU is gradually decreasing during time and leads to poor polymerization, which can not be detected clinically. The purpose...

Objective: One of the factors that can decrease hydrolytic stability of self-etching adhesive systems (SEAS) is 2-hydroxyethylmethacrylate (HEMA). Due to hydrolytic instability of acidic methacrylate monomers in SEAS, HEMA can be present even if the manufacturer did not include it in original composition. The aim of the study was to determine the p...

Objective: This in vivo study tried to determine whether additional disinfection of the root canal with ozone after classic chemomechanic treatment produces further decrease in the number of root canal colonies. Methods: The study encompassed 44 randomly chosen patients with visible chronical periapical lesion determined by Rtg. For each sample,...

The aim of this paper was to determine certain regularities in caries incidence in children in primary and permanent dentition in respect of clinical and non-clinical variables that can be collected in everyday dental practice. This way it could be easier for the operator to adjust individual preventive therapy of patients. The study was conducted...

Minimally invasive dentistry holds an important place in the treatment of caries lesion. Introduction of laser fluorescence as a diagnostic and ozone as a therapeutic means finds more frequent usage in both preventive and curative dentistry. DIAGNOdent device (KaVo, Germany) is based on laser fluorescence which enables early diagnosis as well as mo...

The aim of this study was to assess leakage of root canals obturated using different techniques: cold lateral condensation, warm lateral condensation (Touch’n Heat) and Thermafil. The experimental sample had 70 single rooted permanent teeth. Root canals were instrumented using step-back technique. The teeth were randomly assigned to three groups of...

The study was performed in 1997 and involved school children between the age of 6 and 12 in Novi Travnik, Bosnia and Herzegovina (n = 203) and Zabok, Croatia (n = 132). OHI-S (Simplified Oral Hygiene Index by Green-Vermillion) and DMF (Decayed, Missing, Filled) index were used as main outcome measures. Prewar data were taken from the respective lit...

Reduction of cariogenic bacteria, especially salivary Streptococcus mutans and lactobacilli is a valuable clinical procedure that in many ways alleviates implementation of targeted caries preventive procedures in the entire population. The aim of this study was to investigate the caries preventive values of certain preventive procedures in in vivo...

The form of primary and permanent teeth can differ morphologically from that which is considered normal, completely or in some parts. The changes in tooth form can be hereditary or caused by some disease or trauma. Fusion is a union of one or more teeth during development. Gemination means that two separate morphological units were created by divis...

Aesthetic inadequacy due to hypodoncy of the upper left first premolar of a 20 yearold patient was detected by clinical and radiological examination. After a certain period of time space reduction had occurred because of shifting of a permanent upper canine tooth in the distal direction to the place of the second upper premolar, and the gap created...

Dental caries, because of its spread worldwide, represents a public health problem. It is therefore, not surprising to find a great number of materials and procedures whose goal is the prevention of its formation. One such procedure is use of chewing gums which stimulate the secretion of saliva, thus preventing the formation of dental bacterial pla...

Two groups of population consisting of 84 patients suffering from diabetes (60 type I, 24 type II) and 69 nondiabetics of the same age have been examined on: oral hygiene index (OHI), frequency of daily tooth brushing, dietary habits and incidence of dental caries by registration of the decayed, missed and filled dental surfaces (DMFS-index). OHI i...

This paper describes endodontic treatment of first central upper incisors which have been unsuccessfully treated for a long period as a consequence of inadequate procedure. The root canals of the problematic teeth were obturated for seven days, by correct proper endodontic treatment. Three months after root canal obturation, the teeth were without...

Following a clinical examination and basic radiography, extensive caries defect and specific “C” shaped canal were determined in a 19-year old female patient, admitted to the Department with severe pain in area 47. Instrumentation of the endodontic area was performed. The apical third was obturated with guttapercha point No. 120 and Diaket filler,...

The aim of this study was to stress the importance of periodical removal of hard and soft sediments as well as of dental surface polishing. A clinical examination was performed among 18 fifth year students of the School of Dental Medicine, University of Zagreb. The use of Caries Risk Test (Vivadent, Schaan, Liechtenstein) showed the amount of Strep...

The authors have studied relations between bony optic canal and nerve elements resulting from lesion in the optic nerve. Experimental animals were divided in two groups: young adults and old adult rats; the non-operated sides of rat skulls were used as a control group. At the same time in control samples the changes in osseous openings resulting fr...

Objective: This investigation focused on the effect of additional disinfection of the root canal, with HealOzone, on microbial flora after traditional chemo-mechanical treatment. Methods: The study encompassed 44 patients with visible periapical processes up to 5 mm in length. Patients were divided into three groups. First group were patients wit...