The Effect of Ultrasonic Agitation on the Porosity Distribution in Apically Perforated Root Canals Filled with Different Bioceramic Materials and Techniques: A Micro-CT Assessment.

The present study evaluated the effect of ultrasonic agitation on the porosity distribution of BioRoot RCS/single gutta-percha cone (BR/SC) and MTA Flow (MF) root canals fillings used as apical plugs in moderately curved and apically perforated roots. Eighty mesial root canals of mandibular first molars were enlarged up to ProTaper NEXT X5 rotary instrument 2 mm beyond the apical foramen, simulating apical perforations. Specimens were randomly divided into four experimental groups (20 canals per group) according to the material and technique used for root canal obturation: BR/SC, BR/SC with ultrasonic agitation (BR/SC-UA), MF and MF with ultrasonic agitation (MF-UA).

Porosity Distribution in Single Cone Root Canal Fillings Performed by Operators with Different Clinical Experience: A microCT Assessment.

The objective of this study was to assess the porosity distribution of BioRoot RCS/single gutta-percha point root-canal fillings performed by a general dental practitioner and endodontist. Fourteen plastic models of maxillary premolars with two roots were selected and shaped with HyFlex EDM instruments to a size 40/0.04 taper and randomly divided into two experimental groups.

Microcomputed Tomographic Assessment of the Single Cone Root Canal Fillings Performed by Undergraduate Student, Postgraduate Student and Specialist Endodontist.

The present study evaluated the obturation quality of root canals filled with BioRoot RCS sealer and single gutta-percha point by undergraduate student (US), postgraduate student (PS) and endodontist (ED). Twenty-one plastic models of upper premolars were enlarged with HyFlex EDM instruments to a size 40/0.04 taper and randomly divided into three groups (7 teeth/14 canals per group): US, PS and ED.

Comparing effectiveness of rubber dam and gingival displacement cord with copy abutment in reducing residual cement in cement-retained implant crowns: A crossover RCT.

Objective: To evaluate the amount of residual cement after cementation of implant crown abutments with rubber dam and retraction cord with copy abutments techniques.

Material And Methods: Thirty single posterior metal-ceramic implant-supported restorations were delivered to 20 patients. The crowns were fabricated with occlusal openings obturated with composite, and then luted with resin-reinforced glass-ionomer cement on customised standard abutments.

Shaping and Centering Ability, Cyclic Fatigue Resistance and Fractographic Analysis of Three Thermally Treated NiTi Endodontic Instrument Systems.

The better understanding of the clinically important behavioral features of new instrument systems has an important significance for the clinical endodontics. This study aimed to investigate the shaping and centering ability as well as cyclic fatigue resistance of HyFlex CM (CM), HyFlex EDM (EDM) and EdgeFile (EF) thermally treated nickel-titanium (NiTi) endodontic instrument systems. Sixty curved root canals of the mesial roots of mandibular molars were randomly assigned into three groups ( = 20) and shaped using CM, EDM and EF files up to the size 40 and taper 04 of the instruments.

Dental Trauma Experience, Attitudes and Trauma Prevention in 11- to 13-Year-Old Lithuanian Schoolchildren.

Purpose: To identify the prevalence and determinants of dental trauma in permanent anterior teeth among 11- to 13-year-old schoolchildren, to compare self-reported dental trauma rates with clinical examination trauma rates, and to examine mouthguard use among children engaged in contact sports.

Materials And Methods: A probability sampling scheme was used to recruit schools, with all 6th grade children in the selected schools invited to participate. A total of 2621 caregiver consent forms were sent, of which 807 were returned (31%).

Porosity Distribution in Apically Perforated Curved Root Canals Filled with Two Different Calcium Silicate Based Materials and Techniques: A Micro-Computed Tomography Study.

The present study evaluated the porosity distribution of BioRoot RCS/single gutta-percha point (BR/SC) and MTA flow (MF) fillings, which were used as plugs for the apical perforation repair in curved canals of extracted mandibular molars using micro-computed tomography (μCT). Forty mesial root canals of mandibular first molars were shaped with ProTaper NEXT X1-X5 files 2 mm beyond the apex to simulate apical perforations that were randomly divided into two groups ( = 20) according to the material and technique used for the apical plug: BR/SC or MF. The specimens were scanned before and after canal filling at an isotropic resolution of 9.

Knowledge about traumatic dental injuries in the permanent dentition: A survey of Lithuanian dentists.

Background/aims: In Lithuania, dental trauma cases are often treated by general dentists, but it is unknown whether their age, self-evaluation of trauma knowledge and practice location can predict their actual knowledge and management of trauma cases. The aim of this study was to evaluate whether these factors can be used to predict the actual knowledge and management of trauma cases.

Methods: A 2-part questionnaire included 17 multiple-choice questions about practitioners' demographics, their self-evaluated knowledge and how frequently they treated traumatized permanent teeth as well as 13 clinical scenarios reflecting a variety of clinical trauma cases and their complications.

Potential to induce dentinal cracks during retreatment procedures of teeth treated with "Russian red": An ex vivo study.

Objective: The aim of this study was to compare the impact of treatment procedures on roots previously treated with resorcinol-formaldehyde resin and analyze the effectiveness of dye and magnification for the detection of dentin cracks.

Materials And Methods: Distal roots of 80 permanent first mandibular molars with a single canal were sectioned at 3mm and 9mm from the anatomical apex. Two groups were formed according to the method used for root canal penetration: group 1 (K-file and Pro Taper instruments) and group 2 (Ultrasound with Pro Ultra and Pro Taper files).

Self-efficacy theory-based intervention in adolescents: a cluster randomized trial-focus on oral self-care practice and oral self-care skills.

Aim: The cluster randomized trial tested the efficacy of professional dental education for improving oral self-care skills (OSC-S) and oral self-care practice (OSC-P) in adolescents.

Design: All 15- to 16-year-old adolescents from four public schools were invited and 206 agreed to participate. Schools were randomly allocated to the intervention group and to the control group.

The appearance of root canal surfaces in teeth previously treated using resorcinol-formaldehyde resin: a preliminary SEM investigation.

Objective: To evaluate the root canal surfaces in teeth previously treated using RF resin by SEM.

Material And Methods: 20 distal roots of mandibular molars with typical discoloration of tooth crown were used in this study: 10 brownish - red and 10 non-colored roots. The roots were removed from the crowns, splinted longitudinally and subjected to SEM in a back-scattered electron mode.

Evaluation of bone mineral density in postmenopausal women with alterations of the mandible cortical bone.

Objective: Menopause affects the bone quality and quantity of jaw bone. The aim of this study was to evaluate the validity of mandibular cortical measurements in the diagnosis of low bone mineral density (BMD) in postmenopausal women.

Methods: A total of 113 postmenopausal women (mean age 63.

Treatment procedures and referral patterns of general dentists in Lithuania.

Background And Objective: The requirement for dental specialties and the number of specialists in each country depends on the content and execution of undergraduate dental education, the complex oral health care needs of the society and other factors. The aim of our study was to assess specific treatment procedures of Lithuanian general dentists and their need to refer patients to specialists.

Materials And Methods: Census sampling was employed and the data collected by means of a structured questionnaire asking dentists about the frequency of specific treatment procedures they perform and the frequency of referrals they make to different dental specialists.

Enamel cracks evaluation - A method to predict tooth surface damage during the debonding.

The objective of this in vitro study was to evaluate the effect of the enamel cracks on the tooth damage during the debonding. Measurements of the cracks characteristics (visibility, direction, length, and location) were performed utilizing a scanning electron microscopy (SEM) technique and mathematically derived formulas (x=h/30, l=n*x) before and following the removal of mechanically retained metal and ceramic brackets. The likelihood of having greater extent enamel defects was higher for the teeth with pronounced cracks (odds vatios, OR=3.

Prevalence and etiology of midfacial fractures: a study of 799 cases.

Background And Objective: The prevalence and etiology of midfacial fractures varies among countries. Until now, knowledge about such type of injuries in the region of the Baltic countries was rather scarce. The purpose of the study was to analyze the prevalence, etiology and localization of midfacial fractures treated at the Vilnius University Hospital Žalgiris Clinic, Vilnius, Lithuania.

The prognostic value of visually assessing enamel microcracks: Do debonding and adhesive removal contribute to their increase?

Objective: To find a correlation between the severity of enamel microcracks (EMCs) and their increase during debonding and residual adhesive removal (RAR).

Materials And Methods: Following their examination with scanning electron microscopy (SEM), 90 extracted human premolars were divided into three groups of 30: group 1, teeth having pronounced EMCs (visible with the naked eye under normal room illumination); group 2, teeth showing weak EMCs (not apparent under normal room illumination but visible by SEM); and group 3, a control group. EMCs have been classified into weak and pronounced, based on their visibility.

Odontogenic Maxillofacial Infections: A Ten-Year Retrospective Analysis.

Background: To analyze treatment modalities and results in patients with severe odontogenic maxillofacial infections during a 10-y period.

Methods: Medical records of 1,077 patients hospitalized because of severe odontogenic maxillofacial infections during 2003-2012 were reviewed. The sample consisted of the records that matched inclusion criteria.

A theory-guided school-based intervention in order to improve adolescents' oral self-care: a cluster randomized trial.

Aim: To evaluate the efficiency of social-cognitive theory-guided oral hygiene interventions in adolescents and to identify predictors of adolescents' self-care practice.

Design: A cluster randomized trial included 197 15- to 16-year-olds from two secondary schools. The intervention group received three face-to-face educational hands-on sessions facilitated by a dentist and adolescents worked in pairs.

Do hemophiliacs have a higher risk for dental caries than the general population?

Objective: The aim of this study was to examine if patients with hemophilia were at increased risk for dental decay as compared to the general population.

Materials And Methods: Census sampling was used in this case-control study to recruit cases (patients with hemophilia) and a control group individuals recruited randomly from the general population, which were matched with cases based on gender, age and place of residence. Clinical examinations included dental health and salivary assessments (flow rate, buffer capacity, caries-associated bacteria) and a structured questionnaire which inquired about socioeconomic status and dental health-related behaviors.

Current employment characteristics and career intentions of Lithuanian dentists.

Background: The present survey explored the current employment profile and future career intentions of Lithuanian general dentists and specialists.

Methods: A census sampling method was employed with data collected by means of a structured questionnaire that inquired about demographics, different employment-related aspects (practice type and location, working hours, perceived lack of patients, etc.), and future career intentions (intent to emigrate, to change profession, or the timing of retirement).

Reducing dental plaque formation and caries development. A review of current methods and implications for novel pharmaceuticals.

Dental caries is an oral disease, which has a high worldwide prevalence despite the availability of various prophylactic means, including the daily use of fluoride toothpastes, water fluoridation, dental sealants, oral health educational programs and various antiseptic mouth-rinses. One important reason for this is uncontrolled increase in consumption of foods containing considerable sucrose concentration, especially among children. Sucrose is easily metabolized by oral bacteria (mostly streptococci) to acids and, subsequently, causing tooth decay or dental caries.

Traumatic dental injuries: etiology, prevalence and possible outcomes.

Objective: . The aim was to overview the etiology, prevalence and possible outcomes of dental trauma.

Material And Methods: An electronic search of Medline (PubMed), Cochrane, SSCI (Social Citation Index), SCI (Science Citation Index) databases from 1995 to the present, using the following search words: tooth injuries, tooth trauma, traumatized teeth, dental trauma, dentoalveolar trauma, oral trauma, epidemiology, etiology, prevalence, prevention, pulp necrosis, inflammatory resorption, ankylosis, cervical resorption, was performed.

Hemophilia and oral health.

Objective: The aim was to overview the oral health aspects in hemophilia patients.

Material And Methods: An electronic search of Medline (Pub Med), Cochrane, SSCI (Social Citation Index), SCI (Science Citation Index) databases from 1982 to the present, using the following search words: hemophilia, oral health, dental caries, dental caries prevalence, gingivitis, periodontitis, primary dentition, permanent dentition, dental treatment and review, was performed. The search yielded 196 titles and abstracts on chosen words.

Clinical Factors Influencing Removal of the Cement Excess in Implant-Supported Restorations.

Background: The depth of the cementation margin has an influence on the amount of cement remnants around implants. However, the role of other clinical factors is still not clarified.

Purpose: The aim of the study was to evaluate the correlation between undetected cement and (i) location of the implant, (ii) implant diameter, and (iii) undercut.

Crestal Bone Stability around Implants with Horizontally Matching Connection after Soft Tissue Thickening: A Prospective Clinical Trial.

Background: It has been shown that thin mucosal tissues may be an important factor in crestal bone loss etiology. Thus, it is possible that mucosal tissue thickening with allogenic membrane might reduce crestal bone loss.

Purpose: The purpose of this study was to evaluate how implants with traditional connection maintain crestal bone level after soft tissue thickening with allogenic membrane.