Different Fields Of Dentistry Research Articles

Evaluation of the effect of antimicrobial nanoparticles on bond strength of orthodontic adhesives: A review article

Antimicrobial nanoparticles (NPs) have various applications in different fields of dentistry. The purpose of incorporating NPs into orthodontic adhesives is to inhibit the cariogenic bacteria and reduce decalcifications around bonded orthodontic brackets. However, they may affect the physical and mechanical properties of adhesive such as shear bond strength (SBS). This review was done to answer the question whether the incorporation of antimicrobial NPs into orthodontic adhesives changes the SBS. An electronic search was performed with keywords such as adhesives AND nanoparticles AND orthodontics AND shear strength. After screening and applying eligibility criteria, 18 relevant studies were included. The pooled data suggest that except for 10 wt% of various NPs incorporation, there is no significant difference in SBS between control conventional adhesives and experimental modified ones with tested concentrations. The SBS of orthodontic adhesives containing up to 5% NPs is in clinical acceptable range. However, generalizing the results to in vivo situation may be problematic and further studies are required.

Forensic odontology – Are the dentists really aware

Introduction: Dentistry has much to propose to law enforcement agencies in the detection and solution of the crime. The use of teeth is the most common retractile action of self-defense against any personal attack. Hence, it is the call of the hour for dental practitioners to obligate sound knowledge about forensic odontology and its judicial applications. It is the responsibility of each and every dentist to maintain dental records for identification in the event of child and adult abuse, and mass disasters. Aims and Objectives: The present study was undertaken to analyze and assess the awareness about forensic odontology among practicing dentists in Moradabad. Materials and Methods: A cross-sectional study was conducted among 250 dental surgeons of Moradabad and data were collected via means of questionnaires. Result: The overall result revealed inadequate knowledge about forensic odontology among the practitioners. Conclusion: The experts in different fields of dentistry have scarce or no idea regarding the contribution of their specialization in the field of forensic dentistry. This calls for greater knowledge and awareness among the practitioners and experts to necessitated the same.

Assessment of the Antibacterial Effects of Bismuth Nanoparticles against Enterococcus faecalis.

Introduction Enterococcus faecalis (E. faecalis) is the most important species in dentistry and plays a significant role in the etiology of persistent apical lesions after root canal treatment. Up to date, the intracanal application of 2% chlorhexidine for 7 days is the best way to eliminate E. faecalis. However, due to the ability of this bacterium to persist and survive in harsh environments, many studies have been directed towards finding an alternative strategy for prevention or eradication of it. This study was conducted to investigate the effect of bismuth nanoparticles on E. faecalis, as an etiologic factor in recurrent root canal infections. Methods Forty patients, referred to Endodontic Ward of Shiraz University of Medical Science for endodontic pretreatment, provided root canal samples. First, all samples were transferred in Enterococcosel broth and incubated. Then, samples which showed growth were plated on blood agar plates and incubated for further PCR procedure. Nanoparticle powder was dissolved in high-purity water, and the final concentration of bismuth nanoparticles (BiNPs) was measured by the spectrophotometer. Minimum inhibitory concentration (MIC) of BiNPs against E. faecalis was determined by microbroth dilution method according to methods for antimicrobial susceptibility tests. Also, bactericidal assays were conducted in Mueller-Hinton broth medium and reported as the concentration of BiNPs that reduced the viable bacterial count by 99.9%. Results Of all samples, 77.5% revealed the presence of E. faecalis by PCR. Also, E. faecalis growth inhibition was observed at concentrations ranging from 0.625 μg/ml to 20 μg/ml (geometric mean: 2.337 μg/ml), and the MBC values were between 1.25 μg/ml and 40 μg/ml (geometric mean: 4.781 μg/ml), which in comparison with chlorhexidine, these values were about one-eighth of chlorhexidine. Conclusion The experimental data suggest that bismuth nanoparticles could be an interesting alternative to combat E. faecalis, which, in view of the advantages mentioned for bismuth nanoparticle like inhibiting Streptococcus mutans biofilm formation and higher antibacterial activity compared to chlorhexidine, can be suggested to be used in different fields of dentistry.

Chitosan Use in Dentistry: A Systematic Review of Recent Clinical Studies.

This study aims to highlight the latest marine-derived technologies in the biomedical field. The dental field, in particular, uses many marine-derived biomaterials, including chitosan. Chitosan that is used in different fields of medicine, is analyzed in this review with the aim of highlighting its uses and advantages in the dental field. A literature search was conducted in scientific search engines, using keywords in order to achieve the highest possible number of results. A review of randomized controlled trials (RCT) was conducted to evaluate and process all the relevant results for chitosan and oral health. After a screening and a careful analysis of the literature, there were only 12 results highlighted. Chitosan performs different functions and it is used in different fields of dentistry in a safe and effective way. Among the uses of chitosan, we report on the remineralizing property of chitosan which hardens tissues of the tooth, and therefore its role as a desensibilizer used in toothpastes. According to our systematic review, the use of chitosan has shown better surgical healing of post-extraction oral wounds. Furthermore, some studies show a reduction in bacterial biofilm when used in dental cements. In addition, it has antibacterial, antifungal, hemostatic and other systemic properties which aid its use for drug delivering.

Chlorhexidine Gel Use in the Oral District: A Systematic Review

Chlorhexidine compounds and their different formulations have been investigated several times, especially in the dentistry field. Chlorhexidine application for mouth rinsing immediately underwent oral contraindications, linked to the possibility of causing pigmentation to the teeth or relating to possible cytotoxic events after oral surgery. The positive effects, however, are considerable and its topical antiseptic action has been widely demonstrated by in vitro and clinical research. That’s the reason for its large application in different fields of dentistry. The aim of this study is to collect all the literature regarding the use of chlorhexidine gel in dentistry and all the numerous applications. The initial search on search engines obtained 232 results; then, following the application of the inclusion criteria there were 24 selected articles. The chlorhexidine gel appliance in the dental daily practice is direct to oral surgery, conservative endodontics, prevention and prophylaxis. The use of chlorhexidine has shown some positive effects, also in the case of systemic diseases prevention. Surely, this topical medicine used both professionally and prescribed for home use, can be considered a great help for the prevention of several oral pathologies with systemic implications too.

A study of mechanical properties of titanium alloy Ti-6al-4v used as dental implant material

<p class="abstract"><strong>Background:</strong> Titanium and its alloys are being extensively researched and are applied relatively in different fields of dentistry since 1970s. Its inherent advantages like high strength, ductility, low modulus of elasticity, ease of formation of oxidized surface layer, ability to retain mechanical integrity after autoclave and relatively low toxicity has led to extensive application of titanium and its alloys in implant dentistry.</p><p class="abstract"><strong>Methods:</strong> The Titanium alloy Ti-6Al-4V dental implant material used for the present study was procured from Mishra Dhatu Nigam (Midhani, Hyderabad). The mechanically polished samples were etched using Kroll’s reagent (5% hydrofluoric acid+10% nitric acid+85% water). The etched specimens were examined under optical microscope. </p><p class="abstract"><strong>Results:</strong> The primary α phase being the low temperature phase, is stable and shows single phase microstructure. The size and volume fraction of the primary α and transformed β phases depend on the solution treatment temperatures and the subsequent rate of cooling.</p><p><strong>Conclusions:</strong> The success of the treatment modality relies on the knowledge of the properties required to employ them at the right situation. </p>

Clinical applications of ferric sulfate in dentistry: A narrative review.

Ferric sulfate (FS) has been commonly used as a local hemostatic agent for more than three decades in dentistry. Even though the hemostatic mechanism of FS is questioned, it seems that agglutination of blood proteins occurs due to the reaction of blood with ferric and sulfate ions in acidic pH. FS has gained widespread importance as a pulpotomy medicament in contemporary dentistry; nevertheless, it has several applications in different fields of dentistry which was paid little attention. Hence, the purpose of this paper is to review the various applications of FS in dentistry, along with restorative dentistry and endodontics.

The Use of Optical Coherence Tomography in Dental Diagnostics: A State-of-the-Art Review.

Optical coherence tomography provides sections of tissues in a noncontact and noninvasive manner. The device measures the time delay and intensity of the light scattered or reflected from biological tissues, which results in tomographic imaging of their internal structure. This is achieved by scanning tissues at a resolution ranging from 1 to 15 μm. OCT enables real-time in situ imaging of tissues without the need for biopsy, histological procedures, or the use of X-rays, so it can be used in many fields of medicine. Its properties are not only particularly used in ophthalmology, in the diagnosis of all layers of the retina, but also increasingly in cardiology, gastroenterology, pulmonology, oncology, and dermatology. The basic properties of OCT, that is, noninvasiveness and low wattage of the used light, have also been appreciated in analytical technology by conservators, who use it to identify the quality and age of paintings, ceramics, or glass. Recently, the OCT technique of visualization is being tested in different fields of dentistry, which is depicted in the article.

Titanium and its alloys: properties and applications for use as an oral biomaterial: a review

Titanium and its alloys are being extensively researched and are applied relatively in different fields of dentistry since 1970s. Every property of this metal has proven to be useful in allied branches of dentistry like casting of removable partial denture frameworks, endosseous implants, in surgical reconstruction and orthodontics. Its inherent advantages like high strength, ductility, formability and weldability, low modulus of elasticity, ease of formation of oxidized surface layer, ability to retain mechanical integrity after autoclave and relatively low toxicity has led to extensive application of titanium and its alloys. The success of the treatment modality relies anyways on the knowledge of the properties required to employ them at the right situation. This article provides an insight into the properties of titanium and its alloys employed as a biomaterial for variety of purposes in dentistry with its definitive pros and cons.

Low-Level Laser Therapy in odontostomatologia: istruzioni per l’uso

ObjectivesThe purpose of this paper is to demonstrate the advantages of using Low-Level Laser Therapy (LLLT) in dentistry. Materials and methodsThis work describes mechanisms of action, optimal parameters, possible contraindications to this type of treatment and its main indications. ResultsIn vitro and in vivo studies on animals and humans have shown the efficacy of LLLT mainly in stimulating healing processes, fostering anti-inflammatory mechanisms and controlling pain: these three effects have validated the application of LLLT in different fields of dentistry. ConclusionsLLLT is an undoubtedly great opportunity for applications in dentistry, as, due to its limited contraindications, it may be considered free of side effects: in fact, thanks to the low parameters used, there are neither tissue destruction, nor other possible dangers linked to higher powers.

T-scan III system diagnostic tool for digital occlusal analysis in orthodontics - a modern approach.

This systematic literature review was performed to establish the mechanism, methodology, characteristics, clinical application and opportunities of the T-Scan III System as a diagnostic tool for digital occlusal analysis in different fields of dentistry, precisely in orthodontics. Searching of electronic databases, using MEDLINE and PubMed, hand searching of relevant key journals, and screening of reference lists of included studies with no language restriction was performed. Publications providing statistically examined data were included for systematic review. Twenty potentially relevant Randomized Controlled Trials (RCTs) were identified. Only ten met the inclusion criteria. The literature demonstrates that using digital occlusal analysis with T-Scan III System in orthodontics has significant advantage with regard to the capability of measuring occlusal parameters in static positions and during dynamic of the mandible. Within the scope of this systematic review, there is evidence to support that T-Scan system is rapid and accurate in identifying the distribution of the tooth contacts and it shows great promise as a clinical diagnostic screening device for occlusion and for improving the occlusion after various dental treatments. Additional clinical studies are required to advance the indication filed of this system. Importance of using digital occlusal T-Scan analysis in orthodontics deserves further investigation.

Lasers in dentistry - Thinking ahead…

Abstract Laser technology was introduced in the field of dentistry with a novel idea of overcoming few problems or drawbacks posed by the conventional methods. Theodore Maiman in 1960 introduced the first solid state ruby laser. Since then lasers have gained its popularity in different fields of dentistry. Laser in dentistry is now in vogue and now becoming a part of the dentist's armamentarium. This article gives an insight to the basics of laser physics, types of laser, mechanism of action, their interactions with biologic tissues and their advantage and disadvantage. How to cite this article Priya NK, Sowmya NK, Ashwini R, Madhushankari GS, Lasers in Dentistry - Thinking ahead… CODS J Dent 2014;6;102-107

A comparative study of the diagnostic accuracy of cone beam computed tomography and intraoral radiographic modalities for the detection of noncavitated caries

ObjectivesThe aim of this study was to determine the diagnostic accuracy of cone beam computed tomography (CBCT) in the detection of approximal and occlusal noncavitated carious lesions.MethodsA total of 135 extracted human posterior teeth were used. They were radiographed using the following: conventional film (Kodak Insight), a digital system (PSP plates Digora Optime, Soredex), and a CBCT system (NewTom 3G, Quantitative Radiology). All the images were assessed by two independent observers twice. Receiver operating characteristic analysis (Az) was used.ResultsNewTom 3G 9″ CBCT was statistically inferior to conventional film and a digital system for the detection of approximal caries. NewTom 3G 9″ had significantly higher Az values than PSP plate (p < 0.05), but there were no statistically significant differences between the Az values for CBCT and film (p > 0.33) for occlusal surface caries.ConclusionThe diagnostic accuracy of all three tested radiographic systems is low, and it is necessary to use other methods to improve early caries detection.Clinical relevanceCBCT has found a wide application in different fields of dentistry. The report from a CBCT examination performed for any of these reasons should include all abnormal findings, and the detection of noncavitated caries lesions is especially important because it facilitates the use of noninvasive treatment.

Reliability of multiple-degree incisal/occlusal tooth wear assessment on dental casts: findings from a fiveexaminer investigation and related clinical implications.

The aim was to answer the clinical research question: is incisal/occlusal tooth wear assessment on dental casts performed by five professionals with expertise in different fields of dentistry reliable? Five examiners with different fields of expertise in the dental profession assessed tooth wear on dental casts of 45 subjects, based on a six-degree rating of incisal/occlusal wear. After a calibration meeting, the examiners evaluated the casts individually and various issues concerning interexaminer agreement and reliability were assessed. A total of 872 teeth were evaluated. The five examiners agreed only for the rating of 6.6% of the teeth. The teeth with the highest percentage of agreement were the premolars. Pairwise comparison of the assessments of the examiners #1 (bruxism expert), #2 (orthodontist), #3 (temporomandibular disorders [TMD] and occlusion expert), #4 (dental nurse) showed fair to moderate agreement, with κ-values ranging from 0.306 to 0.577, whilst the examiner #5 (lab technician) achieved low interexaminer reliability values with all the other four examiners. The interexaminer reliability of tooth wear assessment on dental casts performed by five professionals with expertise in different fields of dentistry is highly variable. General practitioners should keep in mind that consensus decisions by the examiners and assessment by raters belonging to the same dental discipline are recommended strategies to increase the reliability of tooth wear evaluation in the clinical setting. This investigation adds to the literature suggesting that, in a clinical setting, a single examiner's assessment of tooth wear on dental casts does not have optimal reliability and that it may be source of internal validity problems in the research setting.

Photodynamic Therapy- A Ray towards Periodontics

The increase of microbial resistance and development of lighting devices with safe and accurate delivery of energy, today professionals can count on therapies to manage pathogens in different fields of dentistry, especially periodontics. The possibility of development of resistance to antibiotics by the target organism has led to development of a new concept with fewer complications i.e. Photodynamic Therapy. The combination of laser light and photosensitizer known as photodynamic therapy (PDT) can be used in periodontal therapy. LASER produces a monochromatic, collimated and coherent light beam. This unique form of light can interact with living tissues leading to surgical and/ or therapeutic applications. A Photosensitizer is a dye substance that is absorbed by the microorganism, cell or tissue allowing it to interact with the light. This mode of treatment is referred to as photodynamic therapy (PDT) or photo-activated disinfection (PAD). Application of photodynamic therapy in periodontics such as pocket debridement, gingivitis, aggressive periodontitis continue to evolve into a mature clinical treatment modality, and is considered as a promising novel approach for eradicating pathogenic bacteria in periodontitis. This Article presents an overview of photodynamic therapy as it represents a novel therapeutic approach in the management of periodontal diseases.

Laser applications in orthodontics.

A laser is a collimated single wavelength of light which delivers a concentrated source of energy. Soon after different types of lasers were invented, investigators began to examine the effects of different wavelengths of laser energy on oral tissues, routine dental procedures and experimental applications. Orthodontists, along with other specialist in different fields of dentistry, can now benefit from several different advantages that lasers provide during the treatment process, from the beginning of the treatment, when separators are placed, to the time of resin residues removal from the tooth surface at the end of orthodontic treatment. This article outlines some of the most common usages of laser beam in orthodontics and also provides a comparison between laser and other conventional method that were the standard of care prior to the advent of laser in this field.

Prevention and treatment of postoperative infections after sinus elevation surgery: clinical consensus and recommendations.

Introduction. Maxillary sinus surgery is a reliable and predictable treatment option for the prosthetic rehabilitation of the atrophic maxilla. Nevertheless, these interventions are not riskless of postoperative complications with respect to implant positioning in pristine bone. Aim. The aim of this paper is to report the results of a clinical consensus of experts (periodontists, implantologists, maxillofacial surgeons, ENT, and microbiology specialists) on several clinical questions and to give clinical recommendations on how to prevent, diagnose, and treat postoperative infections. Materials and Methods. A panel of experts in different fields of dentistry and medicine, after having reviewed the available literature on the topic and taking into account their long-standing clinical experience, gave their response to a series of clinical questions and reached a consensus. Results and Conclusion. The incidence of postop infections is relatively low (2%–5.6%). A multidisciplinary approach is advisable. A list of clinical recommendation are given.

Comparison of the Assessment of Dental Students’ Laboratory Performance through MCQ and DOPS Methods

Background and purpose: Training in laboratory for clinical procedural skills is considered an important part of the core undergraduate dental curriculum. There is some evidence that junior dentists are not adequately trained in these skills. The present study was conducted to compare the assessment of dentistry students’ competence and performance through direct observation of procedural skills (DOPS) and MCQ methods in fixed prosthesis course. Method: This cross-sectional study was conducted on dental students in Shiraz in 2007. The subjects of this study consisted of 54 students who underwent the current format of assessment (DOPS). The instructors evaluated the students’ activity weekly by checklists and evaluation forms provided by the authorities in the administrative and education development office of dental school. They were also assessed by a 20 item MCQ test. The data were analyzed by SPSS software, using frequency distribution mean. Results: The findings revealed that 86.7% of the students in different fields of dentistry had desirable performance and 13/3 % of them had undesirable practical performance, not functioning satisfactorily in their workplace. In this study, there was a direct relationship between the graduates’ average scores and the quality of their performance. Conclusion: DOPS is a useful tool for assessment of dental students’ practical laboratory competence. It is believed that we now have a system for workplace assessment of dental trainees in the labora