Dental Film Research Articles

Acid resistance of hydroxyapatite dental films fabricated through powder jet deposition

This study proposes a novel dental treatment method using powder jet deposition (PJD). PJD can be employed to fabricate hydroxyapatite (HA) films directly on human enamel by blasting fine HA particles. Acid resistance tests were performed on HA films fabricated with two blast angles (α = 60° and 90° with two samples each) and using human enamel (with one sample) to evaluate the usefulness of the HA films in acidic intraoral environments. All samples were dissolved in acid, and their volume gradually decreased over the test time tacid. Transmission electron microscopy images showed that the grain boundaries near the acid-exposed surface of the HA films were densely modified and prevented acid penetration, whereas the human enamel grains became finer owing to the acid–base reaction. Thus, the HA films lost lesser volume than the human enamel did, indicating higher acid resistance. However, one film fabricated at α = 60° partially peeled off during tacid = 6–9 h. Analysis of the PJD phenomenon through smoothed particle hydrodynamics indicated that the tensile residual stresses promoting crack propagation and delamination increased as α became more acute, causing HA film peeling. Therefore, particles should be blasted in multiple directions to avoid stress bias.

Microbial landscape of periodontal pockets against local antibacterial therapy of chronic generalized periodontitis: a multicenter clinical trial

Background. A microbial nature of periodontitis requires an accurate analysis of the pathogenic potential of the periodontal pocket microflora thereby enabling correct diagnosis to be made and the most effective pharmacological agent to be selected for treating chronic periodontitis. Metronidazole demonstrates excellent results for anaerobic microorganisms in the periodontal pocket, whereas minocycline hydrochloride, moxifloxacin and amoxicillin/clavulanate are efficient for aerobic microorganisms. However, specialists find considerably relevant to analyze the correlations between specific bacterial associations in the periodontal pocket against local antibacterial therapy, as well as to track the contents of periodontal pockets long after antibacterial therapy. Therefore, a microbiological analysis of periodontal pocket contents is considered necessary in order to select and monitor the effectiveness of local antibacterial therapy.Objective. To evaluate the effectiveness of local antibacterial therapy for chronic generalized periodontitis by means of analysis of changes in the microbiological composition of periodontal pockets.Methods. The clinical trial involved 144 patients with chronic generalized periodontitis. The study included examination of patients and analysis of clinical data bases of the Department for General Practice Dentistry, Kuban State Medical University and the Dentistry Department, Stavropol State Medical University of the Ministry of Health of the Russian Federation. The trial included patients aged 30 to 60 with a diagnosis of chronic generalized periodontitis of different severity. All periodontitis patients were divided into 2 groups depending on the therapy: main and control groups. Each group had three subgroups depending on the severity of the pathologic process. The first subgroup of the control group (chronic generalized periodontitis of mild degree) consisted of 16 people (11.1%), the second subgroup (chronic generalized periodontitis of moderate degree) — 31 people (21.5%), the third subgroup (chronic generalized periodontitis of severe degree) — 7 people (4.9%). The first, second and third subgroups of the main group consisted of 28 (19.4%), 48 (33.3%) and 14 persons (9.7%) respectively. The severity of periodontitis was determined by the depth of the periodontal pocket, degree of bone resorption (according to x-ray examination), and pathologic tooth mobility. A local anti-inflammatory therapy for the patients of the control group included oral baths with propolis (15–20 drops of 10% propolis tincture diluted in 100 ml of warm water) 3 times a day for 7 days starting from the first visit. At the final stage of treatment after preliminary scaling and rootplaning, patients of the control group received antiseptic gel with 10% metronidazole and 2% chlorhexidine bigluconate to be injected into periodontal pockets with over 4 mm depth. Additionally, applications of adhesive dental films Diplene Denta L (with lincomycin) and Diplene Denta M (with metronidazole) were prescribed to be done in the home. In addition to the above-mentioned comprehensive therapy, patients of the main group received a single insufflation of minocycline hydrochloride microspheres into each periodontal pocket. The tools for the patients of the main group included plastic cannulas with minocycline hydrochloride microspheres in the form of powder in the tip of the cartridge, and a special syringe-insufflator. The technique of antibiotic insufflation into the periodontal pocket was preliminary trained on the model of jaws with the studied pathology. Statistical analysis of the results was performed using variance analysis in the Excel Microsoft Office 2016 (Microsoft, USA).Results. According to the systematic observation of the patients from the control group, periodic fluctuations in microbial population in the majority of pathologic pockets obtained a specific regularity: a decrease in the number of microorganisms on day 21 was followed by its increase in the subsequent period of observation after 30 and especially 60 days. According to the ongoing follow-up of the patients of the main group, fluctuations of microbial population in the majority of pathologic pockets obtained a certain regularity: a significant reduction in the number of microorganisms on day 21 was followed by its slight rise in the subsequent period of observation after 30 and a slight increase again in 60 days. Fluctuations in the number of microorganisms of periodontal pockets in the main group reveal their specific character: their number remained invariably lower than that of the control group throughout the observation period, while the total number of detected periodontopathogens decreased.Conclusion. The established correlations between the main indicators of microbiological status of periodontal pockets and the severity of chronic generalized periodontitis within different periods after the local therapy confirm the positive dynamics of treatment in the main group, where patients were insufflated with minocycline hydrochloride microspheres, proved by a change in the typology of microbial status of periodontal pockets and a number of periodontopathogenic microorganisms.

Development of the Composition and Technology of Obtaining a Dental film with Portulaca oleracea extract

According to the concept of the World Health Organization (WHO), oral health is the main indicator of the overall level of health and well-being, quality of life. Currently, improving oral health, treatment and prevention of chronic diseases of the mucous membrane are relevant. The creation of new dosage forms is an urgent problem, since existing dosage forms have both advantages and disadvantages. Dental film based on biologically active compounds of plant materials is a promising dosage form. The article presents the results of a study on the selection of ingredients for the rational composition of dental films based on carbon dioxide extract of Portulacaoleracea. Model formulations with various excipients have been developed for the selection of ingredients. In order to select the rational composition, a study was conducted on such characteristics as description, average mass, deviation from average mass, pH value, solubility, and the results of the study were described. The rational composition of the dental film with the conditional name "DentaPort" was established: the active substance is carbon dioxide extract of Portulaca oleracea, the formative substance is sodium alginate, a moisture-saving substance and a plasticizer is glycerin, powdered sugar is a corrigent, purified water is a solvent. The excipients were selected taking into account their compatibility with each other and the extract of Portulacaoleracea.

Comparison of Three Dimensional Dental Software Computed Tomography Findings with Real Time Surgical Approaches for Impacted Teeth

An exact localization of impacted teeth is often difficult to assume by using two dimensional conventional radiological techniques like OPG or dental films. In contrast to these two dimensional imaging method, the Dental slice Software Computed Tomography offers a three-dimensional imaging of maxilla-facial region, providing the opportunity to study objectives in all standard plans with three-dimension, reconstructed and multisection views. The aim of this study is to prove the effectiveness of the Dental slice Software Computed Tomography in evaluating the position of impacted teeth as a presurgical diagnostic aid. 25 patients with total of 40 impacted teeth were classified and evaluated by three sets .The first set of radiographs consist of traditional two dimensional images(per apical , occlusal films and OPG).The second set comprised three-dimensional views obtained from a Dental slice Soft ware Computed Tomography and a third set which was surgical interventions results. Teeth crowns were classified into: type I (buccal or labial), type II (palatal or lingual), type III (half distance of the labio-palatal or bucco-palatal ,labio-lingual or bucco-lingual) according to their position within dental arches. The dental soft ware Computed Tomography succeeded to identify the exact situations of whole 40(100%) impacted teeth crowns that were confirmed surgically in the same anatomical locations. On the other hand there was a Failure of 33(82.5%) crowns that could not be determine their positions by two dimensional images and proved surgically in opposite sides. Three dimensional Computed Tomography is a helpful and stimulating tools by providing the surgeons a perfect mulitislices: axial, coronal, sagital, two dimensional and three dimensional images in one visit and once exposure and permits the oral surgeons to visualize the position and surgical anatomy of the tooth as it will be in the operating theatre, thus establishing sufficient patterns for adequate surgical planning ,reduce of need for exploratory procedures with less morbidity to the osseous structure and time saving.

Composition development and biopharmaceutical study of dental films based on peppermint essential oil

Currently, one of the promising ways to take medicines are instant dosage forms (in particular, medicinal films), which have a number in comparison with traditional dosage forms.This work, a composition of films for dentistry has been developed, which includes peppermint essential oil as the main active ingredient, gelatin, natrium-carboxymethylcellulose (Na-KMC), glycerin, Tween-80 and purified water as a film-forming base. The optimal concentrations of polymers that ensure the production of high-quality dosage forms have been established. The results of physical-chemical, pharmaco-technological and biopharmaceutical tests of the obtained films are presented.

Fully automated film mounting in dental radiography: a deep learning model

BackgroundDental film mounting is an essential but time-consuming task in dental radiography, with manual methods often prone to errors. This study aims to develop a deep learning (DL) model for accurate automated classification and mounting of both intraoral and extraoral dental radiography.MethodThe present study employed a total of 22,334 intraoral images and 1,035 extraoral images to train the model. The performance of the model was tested on an independent internal dataset and two external datasets from different institutes. Images were categorized into 32 tooth areas. The VGG-16, ResNet-18, and ResNet-101 architectures were used for pretraining, with the ResNet-101 ultimately being chosen as the final trained model. The model’s performance was evaluated using metrics of accuracy, precision, recall, and F1 score. Additionally, we evaluated the influence of misalignment on the model’s accuracy and time efficiency.ResultsThe ResNet-101 model outperformed VGG-16 and ResNet-18 models, achieving the highest accuracy of 0.976, precision of 0.969, recall of 0.984, and F1-score of 0.977 (p < 0.05). For intraoral images, the overall accuracy remained consistent across both internal and external datasets, ranging from 0.963 to 0.972, without significant differences (p = 0.348). For extraoral images, the accuracy consistently achieved the highest value of 1 across all institutes. The model’s accuracy decreased as the tilt angle of the X-ray film increased. The model achieved the highest accuracy of 0.981 with correctly aligned films, while the lowest accuracy of 0.937 was observed for films exhibiting severe misalignment of ± 15° (p < 0.001). The average time required for the tasks of image rotation and classification for each image was 0.17 s, which was significantly faster than that of the manual process, which required 1.2 s (p < 0.001).ConclusionThis study demonstrated the potential of DL-based models in automating dental film mounting with high accuracy and efficiency. The proper alignment of X-ray films is crucial for accurate classification by the model.

Three-dimensional (3D) printing of oral dental films (ODFs) using blended Compactcel® polymers through semi-solid extrusion (SSE) bioprinter

This study aimed to prototype oral dental films (ODFs) loaded with diclofenac sodium (DS) using two different grades of CompactCel® polymers through a semi-solid extrusion (SSE) bioprinter. This three-dimensional (3D) printed ODFs were developed for the treatment of toothaches with immediate and sustained release features. Two different grades of CompactCel® polymers, CompactCel® P 002.02 SR and CompactCel® P Clear 194.04 SIL, with sustained and immediate release features, respectively, were explored in this study. A blend of CompactCel® polymers was found to be capable of forming hydrogels with the addition of dibutyl phthalate (DBP) as a plasticizer to improve the foldability/flexibility of the developed ODFs. ODFs were 3D printed using an SSE bioprinter by varying the amount of DBP. All 3D bio-printed ODFs were analyzed systematically in terms of in vitro physicochemical characteristics, including drug content, drug release, and release kinetics models. The in vitro release graph of DS from ODFs showed an initial burst release of around 50–70% in 20 min followed by the sustained release of up to 150 min for all the formulations. The prototype ODFs showed dual drug delivery features in terms of initial fast release followed by sustained release. Thus, these ideal biomaterial combinations were explored for the first time to establish not only their pharmaceutical 3D bioprinting capabilities but also their potential for drug delivery applications.

Retracted: Augmented Reality Research of Measuring X-Ray Dental Film Alveolar Bone Based on Computer Image Analysis System.

[This retracts the article DOI: 10.1155/2021/5571862.].

The market study of medicines used for the prevention and treatment of hyperesthesia of dental hard tissues

The purpose of the work is to study the structure of the Ukrainian market of medicines, cosmetics and dental products for the prevention and treatment of hyperesthesia of dental hard tissues in order to determine marketing opportunities for domestic pharmacy.&#x0D; Materials and methods. The study was conducted using structural analysis, logical and graphical methods, methods of marketing analysis.&#x0D; The results. Determined the state of the Ukrainian market of medicines of the specified group with their distribution on means of mass market and specialized means, which are usually used by dentists in professional activity, with allocation of separate groups, namely: toothpastes for sensitive teeth, rinses, dental gels, pastes, creams, varnishes, solutions, films. The market is studied by the number of items, by form of release, country of origin, brand, composition. The dynamics of import and export of oral and dental hygiene products in the context of commodity items according to Foreign Economic Activity Codes has been studied.&#x0D; Conclusions. The composition of desensitizing agents is analyzed, the most popular APIs used to eliminate the manifestations of dental hyperesthesia with their distribution on plant medicinal raw materials, mineral-biological and synthetic are identified. Recently, there is a popularity of the use of calcium hydroxyapatite in dental products for the prevention and treatment of dental hyperesthesia, which is primarily characterized by safety and high biocompatibility with body tissues. The results of research show that the market is 90% import-dependent, and in the group of dental films 100% of the market belongs to Russian manufacturers, the range is unstable, there are no positions for a long time. It should be noted that for the domestic producer, the domestic Ukrainian market is promising, it is stable in terms of consumption, almost completely import-dependent. In this regard, the development of new drugs for the prevention and treatment of hyperesthesia with innovative composition, high biocompatibility, complex action, possibly with controlled access of drugs and with minimal side effects is a promising area of further research.

Clinical radiological evaluation of teeth-part2 : Caries, inflammatory dental changes and important differential diagnoses

Inflammatory diseases of the teeth and periodontium are widespread and are frequent secondary diagnoses in head and neck examinations. Periapical inflammation can be the cause of sinusitis or abscess formation in the oral and maxillofacial region. Early detection is important for the patient's course of treatment. For further diagnostics, adental presentation should be carried out. Dental radiological examinations, such as panoramic radiographs and dental films are used for specific diagnostics. This article is intended to provide an overview of the different stages of caries, the most important inflammatory dental changes and their most frequent differential diagnoses.

Klinisch-radiologische Beurteilung der Zähne –Teil 1

Radiological assessment of the teeth and periodontium is often left to the dentist. Nevertheless, it is useful to know the anatomy and possible anomalies of the teeth in order to correctly assess pathological processes in both projection radiographic and slice imaging. Dental radiological examinations, such as panoramic slice imaging (PSA) and dental film are used for targeted diagnostics. In the case of incidental findings, a dental presentation should be made for further clarification. This article first provides an overview of the anatomy and anomalies of teeth.

Improvement of pharmacotherapy of generalized periodontitis in patients with concomitant urolithiasis

In the treatment of periodontal diseases, to achieve the stabilization of the pathological process and its elimination at the earliest stages, it is important to conduct timely comprehensive therapy. Given this, the development of more effective methods of drug treatment is of considerable practical and theoretical interest. In the complex treatment of generalized periodontitis in patients with urolithiasis, a new technique based on the developed dental film was used. Clinical research methods and index evaluation have confirmed the effectiveness of this method in patients with concomitant urolithiasis.The aim of the work is to optimize local pharmacotherapy in the complex treatment of generalized periodontitis on the background of urolithiasis with the use of dental film.Material and methods. Treatment of generalized periodontitis of the II degree of severity was performed in 85 patients with concomitant urolithiasis (44 patients were the main group using the dental film we treated and 41 - control group, where treatment was performed by conventional methods) according to the protocol of periodontal treatment. Clinical data and index estimates were used to objectify the condition of periodontal tissues in patients.Research results. The effectiveness of the proposed method of treatment of generalized periodontitis is confirmed by reducing the duration of treatment, prolonging the period of clinical stabilization and normalization of clinical and paraclinical studies in patients treated with the developed method in the near and long term after treatment.Conclusion. Clinical evaluation of the developed drug indicates a significant positive effect of its use in the treatment of generalized periodontitis. The positive effect of the dental film is caused by wound-healing, anti inflammatory, antimicrobial, anti-edematous and locally analgesic effect of this drug.

Development and evaluation of dental film of doxycycline for the treatment of periodontitis

The study has been designed to formulate intrapocket dental film loaded with doxycycline to be used for insertion into the periodontal pockets and evaluate its clinical efficacy. Doxycycline dental films were prepared by the solvent casting technique using polymers such as gelatin was used as film former. Glycerin as plasticizer and glutaraldehyde as cross linking agent were used. The prepared films (F1-F9) were evaluated for various physicochemical parameters employing established pharmaceutical procedures such as surface pH, folding endurance, tensile strength, swelling index, drug content, in-vitro drug release, antibacterial efficacy, stability studies. Experimental parameters of the obtained film exhibited results within the desired limit. Fourier Transform Infrared Spectroscopy and Differential Scanning Calorimetry studies revealed the formulated film to be stable during drug stability and compatible between drugs and excipients. In-vitro dissolution studies showed an initial burst release to achieve an immediate therapeutic level of drug in the periodontal pocket followed by a progressive fall and extended-release of the drug for 12 days.

The role of yogurt enriched with LGG culture (Lactobacillus rhamnosus GG) in dental caries prevention

Introduction/Objective. Contemporary tendencies suggest that probiotics can significantly reduce the prevalence of caries in children, so it can be considered that they have a positive effect on general and oral health. Lactobacillus rhamnosus GG (LGG) is a probiotic culture of particular importance in preventive dentistry. The aim was to assess the effects of consumption of probiotic strain Lactobacillus rhamnosus GG on the dental plaque accumulation in children with mixed dentition. Methods. Research included 90 children with mixed dentition (5?12 years old). The first study group consumed 200 ml of Lactobacillus rhamnosus GG-enriched yogurt (B-Activ LGG, Dukat) daily for a period of 14 days, while the remaining 30 formed the second study group who consumed 200 ml of yogurt (Jogurt 1.5% milk fat, Imlek) with manually added powder from probiotic capsule (Wayaforte LGG capsule, Medis) daily for 14 days. The control group consisted of 30 children who had regular diet during examination period. Silness?Loe plaque index and saliva pH (pH-Fix-0-14, Macherey-Nagel) were determined at baseline and also upon intervention completion. Results. An increase in pH values was observed in both study groups. In general sample, there is a significant decrease of mean plaque index values (p &lt; 0.001). Both study groups had significant decrease of mean plaque index values on the baseline and after 14 days consumption of yogurt. In the control group the number of subjects with decrease plaque index values did not correlate and no association was found. Conclusion. Consistent consumption of LGG culture-enriched yogurt inhibits dental film accumulation and promotes saliva pH increase in children with mixed dentition.

Study of physicochemical characteristics of calcium hydroxyapatite «Kalident Powder 100» in the development of dental medicine

Despite the development of the dental industry, the prevalence of dental hypersensitivity does not decrease but increases at a progressive rate. Given the above, the subject of our research was the development of dental medicinal films with micronized calcium hydroxyapatite under the trade name «Kalident Powder 100» (Kalichem, Italy) for the treatment of dental hyperesthesia and caries prevention. To establish the optimal method of calcium hydroxyapatite introduction into the dental film, it was necessary to study the influence of different dispersion mediums on the physicochemical characteristics of the substance under study.&#x0D; Purified water, ethyl alcohol 96%, polysorbate 80, glycerol, polyethylene oxide-400, propylene glycol, sunflower oil, vaseline oil were used as dispersion medium in the studies. Research of physico-chemical characteristics was performed both for the substance «Kalident Powder 100» separately and for its mixtures with the studied liquids and their combinations (in a ratio of 1:1). The following physico-chemical characteristics have been determined: disperse and diffraction analysis of particle size distribution, morphological description, linear dimensions, shape factor, volume coefficient, Martin and Ferret diameters, wettability.&#x0D; The results of crystallographic and disperse analysis have revealed the polydispersity of the substance «Kalident Powder 100» and its high ability to agglomerate, which may adversely affect the homogeneity of its distribution in the dental medicinal product. A study of the effect of different dispersion medium on the physicochemical characteristics of calcium hydroxyapatite has shown a positive effect of hydrophilic liquids on the wettability of powder particles, changes in their shape, size, and distribution in the studied samples. It has been established that the combination of the substance «Kalident Powder 100» with combined solvent systems containing purified water, polysorbate 80, glycerol, and PEO-400, allows achieving optimal shape and particle size of calcium hydroxyapatite with their uniform distribution throughout the liquid, which is also confirmed by the results of laser diffraction. The obtained results will be used in further research on the development of dental medicinal film.

Effects of Gender and Age in Mandibular Leeway Space for Taiwanese Children.

Purpose: Leeway space is clinically crucial in pediatric dentistry because it is utilized to resolve tooth crowding and allow the first molars to drift mesially to establish a Class I molar relationship in the later stages of mixed dentition. This study investigated leeway space in the mixed dentition of Taiwanese children of different sexes and ages. Materials and Methods: The digital panoramic dental films of 182 lower arches of 119 boys and 63 girls aged 5–10 years were analyzed in this retrospective study. The mesiodistal crown widths of the primary canines and first and second molars and the permanent canines and first and second premolars were measured using medical imaging software. Differences in leeway space were statistically analyzed. Results: The average leeway space was 1.29 ± 1.48 mm on each side of the lower arch. The leeway space of children aged 5–6 years was significantly greater than that of children aged 7–8 years. No gender difference in crown width was discovered, except with regard to the primary first molar. Although no gender difference in leeway space was observed, permanent teeth affected leeway space more for girls than for boys. Conclusion: In Taiwanese children, although leeway space does not differ by sex, age affects leeway space. However, permanent tooth size has an influence on the leeway space of girls.

Dr. Edith H. Quimby: A pioneering medical physicist and educator with outstanding contributions in radiation dosimetry

Dr. Edith H. Quimby: A pioneering medical physicist and educator with outstanding contributions in radiation dosimetry

FORMULATION AND IN VITRO EVALUATION OF CHITOSAN FILMS CONTAINING LINEZOLID FOR THE TREATMENT OF PERIODONTITIS

The study was aimed to formulate a dental film containing linezolid, a broad spectrum antimicrobial agent which could be easily placed into the periodontal pocket and be capable of delivering therapeutic concentrations of drug for prolonged periods and also reducing the side effects. In the present investigation, chitosan strips containing linezolid in three different concentrations (10, 20, and 30 %w/w with respect to the weight of polymer) were prepared by the solvent casting method, by using 1 %V/V acetic acid solution. The prepared formulations were evaluated for various properties such as weight variation, thickness, folding endurance, moisture loss, tensile strength, in vitro release, release kinetic study and stability studies. The weight variation and thickness were found to be in the range of (0.99-1.58 mg) and (0.92-1.76 mm), the moisture content, folding endurance was found to be maximum for the plain film and minimum for the drug containing formulation. The tensile strength was found to be in the range of (2.44-1.43 kg/ mm2 ) for the formulation. The dissolution studies showed a burst release initially followed by a progressive fall in the release of the drug (91.15 - 95.87 %) and the release kinetics followed the zero-order pattern. The short term stability studies were conducted and there were no significant changes observed. Hence, low dose, site-specific linezolid film is a potential tool for the treatment of periodontitis.

Development and quality evaluation of chitosan-coated cellulose acetate phthalate-poloxamer enamel adhesive device for the treatment of dentin carious lesion

The present study was aimed to develop chitosan-coated enamel adhesive device of CAP-P 407 (Cellulose acetate phthalate-Poloxamer 407), loaded with MNC (Minocycline) for sustained release and site-specific drug delivery system for the carious lesion. The average tensile strength and in-vitro drug release of uncoated dental film were found to be 15.97 kg/mm2 and 98.11% in 24 h, respectively. The average in-vitro mucoadhesion time and tooth adhesion strength of the finished product was found to be 249 minutes and 268 g, respectively. In-vitro antimicrobial study showed the drug concentration is well above MIC even after 8 hours of drug release.

The difference in radiopacity of microhybrid, nanofiller and nanohybrid composite resins with conventional periapical radiographic techniques

Objective: The radiopacity of dental composite restorative materials is important since it allows assessment of the integrity of composite restorations, accurate diagnosis of secondary caries development and evaluation of the interface between the com-posite restorative material and the tooth structure on the new materials introduced in the market nowadays. The purpose of this observation is to determine the differences of microhybrid, nanofiller and nanohybrid composite resins on their radiopacity using conventional periapical radiography techniques. Methods: Composite resins samples were divided into three groups; 30 samples each. Group I were microhybrid composite resin. Group II were nanofiller composite resin. Group III were nanohybrid composite resin. Each specimen was placed on a dental film and exposed using conventional radiographic techniques with the specification of 70 kVp, 8mA and 0.25s, then processed using instant film procedures. Observations were carried out using the densitometer. The results of calculations were analyzed by using the one way Anova test. Results: Significant radiopacity dif-ferences were occurred in those three groups (p&lt;0.05). Nanohybrid composite resin (2.32 mmAl) was significantly more ra-diopaque than microhybrid composite resin (2.20 mmAl) and nanofiller composite resin (2.10 mmAl). Conclusion: There are differences between microhybrid, nanofiller and nanohybrid composite resins. Resins that have the highest to the lowest ra-diopacity levels are nanohybrid, microhybrid, and nanofiller composite resin.