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This article investigates vertical forces and torque during rotary instrumentation of root canal. Measurement has been performed on in vitro model of the root canal.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
The aim of the study was to examine the influence of the state of the pulp and apical periodontium on the results of electronic root canal length measurement (ERCLM) with a resistance measuring device in dogs. Pulpitis and apical... more
The aim of the study was to examine the influence of the state of the pulp and apical periodontium on the results of electronic root canal length measurement (ERCLM) with a resistance measuring device in dogs. Pulpitis and apical periodontitis were induced by pulp exposure and contamination by the oral flora in the premolar teeth of six mongrel dogs, comprising four experimental groups (36 root canals). In a control group, measured lengths of teeth with uninfected pulps were performed on the first experimental day (44 root canals). In all animals the ERCLMs were performed on teeth with healthy pulps, and at the end of the experimental period (20, 35, 50 and 65 days) following pulp exposure. The point of measuring canal lengths was the anatomical obstacle above the apical delta. Electronically measured lengths (EML) were compared between each other and with the root canal length established by tactile-sense measurement verified radiographically. The EMLs were less accurate in teeth with healthy pulps and teeth with pulpitis in the third experimental group (dif=2.27 x 2.65 mm(2); t test, p<0.05), while they were most precise after 65 days in teeth with completely necrotic pulp and established chronic apical periodontitis (dif=0.54 x 1.36 mm(2); t test, p>0.05). These results suggest that the state of the pulp and periapical tissue may have an influence on the ERCLM.
Research Interests: Mathematics, Computer Science, Dentistry, Biomedical Engineering, Electronics, and 15 moreMedicine, Dogs, Animals, Premolar, Odontometry, Periodontitis, Dental Pulp Cavity, Electrical And Electronic Engineering, Control Group, Pulpectomy, Dental Pulp, Experimental Group, periodontium, Pulpitis, and Bicuspid
Udžbenik se bavi poremecajim oralnog zdravlja i utjecjima na opce zdarvlje. Iz razlicitih specijalistickih aspekata navedeno je kako pojedini poremacaji utjecu na razne bolesti ostalih organa i organskih sustava.
Research Interests: Medicine and Oral health
The purpose was to measure and analyse the vertical force and torque developed in the wider and narrower root canals during hand ProTaper instrumentation. Twenty human incisors were divided in two groups. Upper incisors were experimental... more
The purpose was to measure and analyse the vertical force and torque developed in the wider and narrower root canals during hand ProTaper instrumentation. Twenty human incisors were divided in two groups. Upper incisors were experimental model for the wide, while the lower incisors for the narrow root canals. Measurements of the force and torque were done by a device constructed for this purpose. Differences between the groups were statistically analysed by Mann–Whitney U‐test with the significance level set to P < 0.05. Vertical force in the upper incisors ranged 0.25–2.58 N, while in the lower incisors 0.38–6.94 N. Measured torque in the upper incisors ranged 0.53–12.03 Nmm, while in the lower incisor ranged 0.94–10.0 Nmm. Vertical force and torque were higher in the root canals of smaller diameter. The increase in the contact surface results in increase of the vertical force and torque as well in both narrower and wider root canals.
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Research Interests:
Backgroung/Aim. Interest in dental esthetics has increased rapidly during the last few decades among both patients and dentists, and the creation of a natural dental appearance has become an important task in all fields of dentistry,... more
Backgroung/Aim. Interest in dental esthetics has increased rapidly during the last few decades among both patients and dentists, and the creation of a natural dental appearance has become an important task in all fields of dentistry, especially in prosthodontics and restorative dentistry. The aim of this research was to investigate factors influencing a patient's decision to choose the type of treatment to improve dental esthetics. Methods. A total of 700 Caucasian subjects participated in the crosssectional study (261 men, 439 women, aged 18-86 years, mean age 46.2 ? 18.6). The study included clinical examination and a self-administrated questionnaire based on self-perceived esthetics, satisfaction with the appearance of their maxillary anterior teeth and previous dental experience. Multiple logistic regression was used in statistical analysis. Results. Hiding teeth during smile was the most important predictor for choosing fixed prosthetic restorations (OR 9.1), followed by se...
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To determine the influence of frequent removable partial denture (RPD) wearing on the alveolar bone density changes around the abutment teeth. Fifty examinees of both genders, wearing partial dentures, were included in the study. Thirty... more
To determine the influence of frequent removable partial denture (RPD) wearing on the alveolar bone density changes around the abutment teeth. Fifty examinees of both genders, wearing partial dentures, were included in the study. Thirty one of the examinees (62%) were wearing the dentures 24 hours a day, while nineteen (34%) of them were wearing them only during the day. The changes in the bone density around the abutment teeth were determined by the intraoral microdensitometry method. Standard retroalveolar radiographs were performed twice. The first one before the removable partial denture delivery and the second one after a period of three-month denture wearing. A copper step wedge consisting of five steps (0.1-0.5 mm) was attached to the radiograph in order to calibrate it. Seven points, regions of interest (ROI) close to the root of the abutment tooth, all ten pixels in size, were selected on each radiograph. Grey areas in the regions of interest were measured and converted int...