scholarly journals Mechanical Stress Exploration Inside of Dental Filling Materials by Means of Electronic Speckle Pattern Interferometry / Shearography

2017 ◽  
Vol 54 (4) ◽  
pp. 616-619
Author(s):  
Alina Ormenisan ◽  
Daniel Tamas Szava ◽  
Ioan Szava ◽  
Ciprian Dalai
Keyword(s):  
Speckle Pattern ◽  
Glass Ionomer Cement ◽  
Academic Research ◽  
Mechanical Stresses ◽  
Electronic Speckle Pattern Interferometry ◽  
Filling Material ◽  
Dental Tissues ◽  
Vertical Loading ◽  
Dental Filling ◽  
Filling Materials

Possible causes of microleakage and microfractures of dental fillings are often in the center of many academic research and investigations. Some authors found that one important cause of microleakage is the contraction/ shrinkage of the filling materials during polymerization. The purpose of this study is to demonstrate that microcracks and consequent microleakage is influenced by mechanical stresses occurring inside of dental filling materials and at the interface of the dental cavities and dental filling materials. We also tried to evaluate the deformation of some dental filling material types during mechanical loading. Cylindrical specimens were made of different types of dental filling materials, namely microhybrid composites and glass ionomer cement. Some extracted teeth were prepared with class II cavities, and filled. The lateral swelling of the tested specimens and the deformation of the filled teeth during vertical axial loading was measured with an optical method, ESPI/ Shearography.Of the tested specimen, the least deformable dental filling materials were the composite materials. During occlusal vertical loading of the filled teeth, there were found that mechanical stresses were different inside of the filling material than inside of the walls of the dental tissues, mechanical stressed being concentrated at the restoration interface. The ESPI/Shearography meth ode proved to be very useful for investigation in this field. Due to mechanical stresses accumulating at the interface of the dental filling material and the walls of the dental cavity, it is possible that later microcracks to appear due to masticatory forces.

scholarly journals Dentists' perspective on preference for direct restorative materials for different tooth cavities: A study from two colleges in Kathmandu, Nepal

2014 ◽  
Vol 3 (2) ◽  
pp. 72-77
Author(s):  
Keshav Raj Poudel ◽  
Suman Gautam ◽  
Prenit Pokhrel ◽  
Bijendra Raj Raghubanshi ◽  
Amshuman Shrestha ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Dental Amalgam ◽  
Filling Material ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Posterior Tooth ◽  
Filling Materials ◽  
Carious Teeth ◽  
Ionomer Cement ◽  
Selection Of

Background: Restoration of carious teeth is required to preserve anatomy, function and aesthetics of a tooth. Proper restoration of carious teeth is paramount for the prevention of progression of a dental caries so as to obviate the need for root canal treatment. Location, extent, type, duration and cost play the major roles for the selection of a dental filling material.Objective: This study was set to know the preference of dentists for the selection of filling materials for different tooth cavities.Methods: This was cross-sectional observational study carried out at Kantipur Dental College and KIST Medical College for a period of six months. Pre-structured questionnaires were distributed to the dentists who were in dental practice and collected questionnaires were analyzed for the results. Data were compiled, entered and analyzed using Microsoft Excel 2007 and Epi Info 2000. Yates corrected Chi square test was used wherever applicable and level of significance was set at <0.05.Results: Out of 65 questionnaires distributed to the dental practitioners, 57 (87.7%) questionnaires were returned. Composite was the material of choice as the restorative material for all kinds of tooth cavities except for class V for which glass ionomer cement was the main choice (52.6%). After composite, dental amalgam was second most preferred material for posterior tooth restorations. Order of preference for filling materials for posterior restorations were: composite (52.6%), dental amalgam (47.4%), miracle mix (68.3%; P<0.05) and glass ionomer cement (42.1%). Majority of practitioners (78.9%,P<0.05) opined that strength and durability of restorative material is the main guiding factor for the selection of the filling material for posterior tooth restorations. Additionally, dental amalgam had higher (68%, P< 0.05) patient satisfaction with respect to cost and longevity or durability and was associated with less tiring and time consuming procedure (84%; P<0.05) on dentists’ view.Conclusion: Majority of dentists opined that composite is the more preferred filling material for both anterior and posterior tooth restorations. For posterior tooth cavities (mainly for class I, II and VI) after composite, the order preference for filling materials was amalgam, miracle mix and glass ionomer cement.DOI: http://dx.doi.org/10.3126/jkmc.v3i2.11230Journal of Kathmandu Medical CollegeVol. 3, No. 2, Issue 8, Apr.-Jun., 2014Page: 72-77

scholarly journals Exposure to Dental Filling Materials and the Risk of Dementia: A Population-Based Nested Case Control Study in Taiwan

2019 ◽  
Vol 16 (18) ◽  
pp. 3283 ◽  
Author(s):  
Natalia Mikhailichenko ◽  
Kimitoshi Yagami ◽  
Jeng-Yuan Chiou ◽  
Jing-Yang Huang ◽  
Yu-Hsun Wang ◽  
...  
Keyword(s):  
Large Scale ◽  
Population Based ◽  
Epidemiologic Studies ◽  
Toxic Substances ◽  
Filling Material ◽  
Dental Practice ◽  
Dental Filling ◽  
Filling Materials ◽  
People With Dementia ◽  
Somatic Diseases

When studying the range of toxic substances triggering dementia, special attention should be paid to the materials used in dental practice, particularly to dental fillings containing amalgam. This necessitated conducting large-scale epidemiologic studies. The aim of our research was to determine the risk factors for developing dementia when filling materials containing amalgam are used in dental practice. In order to achieve the set goals, the following tasks were undertaken: (1) The social and demographic characteristics of the examined patients were studied; (2) the spectrum of concomitant somatic diseases was determined in patients of different gender and age; and (3) the relationship between dementia incidence and the volume of dental filling material containing amalgam was identified in patients with different somatic diseases. In general, the research conducted did not reveal any direct relationship between the development of dementia and the volume of filling material containing amalgam. However, among the people with dementia, there were persons for whom its progression was accelerated in cases where a large volume of dental filling material containing amalgam was present.

scholarly journals GAMBARAN PENGGUNAAN SEMEN IONOMER KACA SEBAGAI BAHAN TUMPATAN GIGI DI BALAI PENGOBATAN RUMAH SAKIT GIGI DAN MULUT UNIVERSITAS SAM RATULANGI PADA TAHUN 2011 SAMPAI 2012

e-GIGI ◽  
2013 ◽  
Vol 1 (2) ◽  
Author(s):  
Gizela Stephanie Saerang
Keyword(s):  
Oral Health ◽  
Medical Records ◽  
Glass Ionomer Cement ◽  
Research Data ◽  
Filling Material ◽  
Glass Ionomer ◽  
Dental Clinic ◽  
Cross Sectional ◽  
Filling Materials ◽  
Ionomer Cement

Caries is a disease most commonly found in the oral cavity so that is the main problem of oral health. Dental caries should be taken care of by filling. Nowadays have been found filling materials for caries in example glass ionomer cement (GIC). At the Dental Clinic of Sam Ratulangi University, GIC is the preferred material often chosen by dentists for caries.The purpose of this research is ti know abaout the use of GIC as restoration material in the Dental Clinic of Sam Ratulangi University in 2011-2012. This research is a descriptive retrospective research using the cross sectional approach by taking the medical records of patients in the Dental Clinic of Sam Ratulangi University whom were given GIC as the filling material. The amount of research data retrieved were of 247 patients with 355 teeth filled by GIC and categorized based on the year of fillng, age,sex, region of feeling and the period of teeth in each patient.The results show that in the year of 2012 the use of GIC restorations has increased in comparison to the year 2011. Treatment with a GIC is more often accepted by female patients and most of them were children. The posterior region of the teeth is the region most filled by GIC and most of the period of permanent teeth.Keywords: glass ionomer cement, fillingAbstrakKaries merupakan salah satu penyakit yang paling banyak dijumpai di rongga mulut sehingga merupakan masalah utama kesehatan gigi dan mulut. Perawatan untuk gigi yang mengalami karies salah satunya bisa dengan cara ditumpat. Saat ini telah banyak ditemukan bahan tumpatan untuk karies gigi, contohnya semen ionomer kaca (SIK). Di Balai Pengobatan Rumah Sakit Gigi dan Mulut (BP-RSGM) Universitas Sam Ratulangi, SIK merupakan salah satu bahan tumpatan yang sering dipilih oleh dokter gigi pada pasien yang mengalami karies.Penelitian ini bertujuan untuk mengetahui gambaran penggunaan SIK sebagai bahan tumpatan gigi di BP-RSGM Universitas Sam Ratulangi pada tahun 2011-2012. Jenis penelitian ini merupakan penelitian deskriptif yang menggunakan metode studi cross sectional dengan pengambilan data dari rekam medis pasien yang ditumpat dengan SIK di BP-RSGM Universitas Sam Ratulangi. Jumlah data penelitian yang dambil yaitu 247 pasien dengan 355 gigi yang ditumpat dan dikategorikan berdasarkan tahun penumpatan, usia, jenis kelamin, regio dan periode gigi yang di tumpat pada setiap pasien.Hasil penelitian menunjukkan pada tahun 2012 telah terjadi peningkatan dalam penggunaan SIK dibandingkan pada tahun 2011. Perawatan SIK lebih sering dipakai oleh pasien perempuan dan sebagian besar berusia anak-anak. Regio posterior merupakan regio gigi yang paling banyak mendapatkan tumpatan SIK dan paling banyak pada periode gigi permanen.Kata kunci: semen ionomer kaca, penumpatan

scholarly journals Influence of dental filling material type on the concentration of interleukin 9 in the samples of gingival crevicular fluid

2016 ◽  
Vol 73 (8) ◽  
pp. 728-734 ◽  
Author(s):  
Vladimir Stefanovic ◽  
Ervin Taso ◽  
Aleksandra Petkovic-Curcin ◽  
Mirjana Djukic ◽  
Milka Gardasevic ◽  
...  
Keyword(s):  
Dental Pulp ◽  
Wound Repair ◽  
Gingival Crevicular Fluid ◽  
Prospective Clinical Study ◽  
Filling Material ◽  
Gingival Index ◽  
Dental Fillings ◽  
Dental Filling ◽  
Filling Materials ◽  
Pulp Inflammation

Background/Aim. Several cytokines and lymphokines (IL1?, ENA78, IL6, TNF?, IL8 and S100A8) are expressed during dental pulp inflammation. Analysis of gingival crevicu-lar fluid (GCF) offers a non-invasive means of studying gen-eral host response in oral cavity. Although GCF levels of various mediators could reflect the state of inflammation both in dental pulp and gingiva adjacent to a tooth, GCF samples of those without significant gingivitis could be inter-preted as reflection of pulpal process. The aim of this study was to investigate IL9 GCF values in patients with dental car-ies and to assess possible influence of various dental fillings materials on local IL9 production. Methods. The study group included 90 patients, aged 18?70, with inclusion and exclusion criteria in the prospective clinical study. Of the 6 types of material used for the restoration of prepared cavities, 3 were intended for temporary and 3 for definitive restora-tion. According to dental fillings weight, all the participants were divided into 3 groups: those with fillings lighter than 0.50 g, those with 0.50?1.00 g, and those with fillings heavier than 1.00 g. Samples were taken from gingival sulcus using the filter paper technique. Clinical parameters were deter-mined by bleeding index, plaque index (Silness-Lou, 0?3), gingival index (0?3), and gingival sulcus depth. Cytokine con-centrations were assessed using commercially available cy-tomix. Results. According to the weight of dental fillings, there was a clear decreament trend of IL9 values meaning that dental defects greater than 1.00 g of dental filling were associated with lower GCF IL9 concentration. The IL9 val-ues correlated with the degree of gingival index and depth of gingival sulcus, being higher with more advanced gingivitis and more pronounced anatomical changes in the tooth edge. Different filling materials exerted various local IL9 responses. Zink polycarbonate cement and amalgam fillings induced a significant and long-lasting local IL9 decrement, while the use of Tetric EvoCeram and GMA-BISK significantly increased IL9 levels. Conclusion. The obtained results indicate that IL9 GCF could be regarded as a measure of odontoblasts? re-sponse to the extensity of dental caries. The type of material used for dental fillings could profoundly alter biological func-tion of gingival and pulpal cells. Also, the results obtained in this study suggest that some materials could even enhance wound repair by modulating macrophage activation.

scholarly journals Erosive Effect of Acidic Beverages On Dental Filling Materials Surface (In Vitro Study)

2021 ◽  
Author(s):  
Yuliya Morozova ◽  
Barbora Novotná ◽  
Pavel Holík ◽  
Iva Voborná ◽  
Jana Zapletalová
Keyword(s):  
In Vitro Study ◽  
Dental Amalgam ◽  
Vitro Study ◽  
Dental Tissues ◽  
Dental Filling ◽  
Filling Materials ◽  
Before And After ◽  
Acidic Conditions ◽  
Hard Dental Tissues

Abstract Erosive tooth wear, that is characterized like irreversible loss of hard dental tissues due to influence of external and internal acids of nonbacterial origin, is one of the most common damage of a tooth surface. Erosive factors also affect the surface of dental reconstruction materials that ideally should be resistant against them. Dental filling materials designed for this purpose must be able to withstand these effects in a comparable or even better way than enamel. In our in vitro study we investigated using the nanoindentation the hardness of currently available dental filling materials (dental composite resin, self curing and dual cures glassionomer cement, dental amalgam) before and after erosive attacks (exposure to Coca Cola for 5 min and 14 days) and consequently compare it with them of human dental enamel. Furtermore we analised the surface topography of the samples before and after acidic exposure by confocal laser scanning microscope. In our experiments the filling materials were affected by the acidic environment only minimally in comparison with hard dental tissues. We confirmed the fact that dental amalgam is still the most mechanically and chemically resistant filling material. Both GIC materials showed the worst resistance against acidic conditions and higher surface roughness even before exposure. We also declared excellent withstanding of resin composite materials against acidic conditions that was even better than natural enamel. Furthermore by CLSM was detected almost unaltered surface of these filling materials. This fact as well as adhesive properties of resin composites allow to assume that this material could be the most suitable material for dental erosion reconstruction.

EXPERIMENTAL RATIONALE FOR THE CHOICE OF FILLING MATERIAL FOR TREATMENT ROOT CARIES

2015 ◽  
Vol 11 (4) ◽  
pp. 8-13
Author(s):  
М. Нагаева ◽  
M. nagaeva ◽  
А. Скворцова ◽  
A. Skvortsova ◽  
С. Безкровная ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
High Strength ◽  
Adhesive System ◽  
Point System ◽  
Filling Material ◽  
Root Caries ◽  
Glass Ionomer ◽  
Filling Materials ◽  
High Prevalence ◽  
Ionomer Cement

<p>High prevalence of root caries and high frequency of defects fit the seals makes the problem of filling materials choice for treatment root caries relevant. To justify the treatment of root caries by optimizing the choice of filling material. For our study, when filling cavities, the most commonly used filling materials of different classes, were chosen: nanohybrid composite with an adhesive system, triple curing hybrid glass ionomer cement, packable self-curing high strength glass ionomer cement. In experiment, marginal permeability of studied materials towards hard tissue (enamel, dentin, and root cement) were assessed on a five-point system Khera S.C, Chan K.C. 45 sampleswas investigated in total (for 15 samples in each group).</p>

scholarly journals Lithium Disilicate Ceramic Endocrown Biomechanical Response According to Different Pulp Chamber Extension Angles and Filling Materials

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1307
Author(s):  
João Paulo Mendes Tribst ◽  
Roberto Lo Giudice ◽  
Alison Flavio Campos dos Santos ◽  
Alexandre Luiz Souto Borges ◽  
Laís Regiane Silva-Concílio ◽  
...  
Keyword(s):  
Resin Composite ◽  
Glass Ionomer Cement ◽  
Filling Material ◽  
Glass Ionomer ◽  
Pulp Chamber ◽  
Cement Layer ◽  
Filling Materials ◽  
Biomechanical Response ◽  
Root Canal System ◽  
Ionomer Cement

The purpose of this study is to evaluate the effect of pulp chamber extension angles and filling material mechanical properties on the biomechanical response of a ceramic endocrown. A 3D model of maxillary molar that underwent endodontically treatment was exported to computer aided design software to conduct finite element analysis (FEA). The endocrown model was modified considering different pulp chamber extension angles (right angle; 6°, 12° and 18° of axial divergence). The solids were imported into the computer aided engineering software in Standard for the Exchange of Product Data (STEP) format. Nine different filling materials were simulated to seal the orifice of the root canal system under each endocrown restoration (resin composite, bulk-fill resin composite, alkasite, flowable resin composite, glass ionomer cement, autocured resin-reinforced glass ionomer cement, resin cement, bulk-fill flowable resin composite, zinc oxide cement), totaling 36 models. An axial load (300 N) was applied at the occlusal surface. Results were determined by colorimetric graphs of von-Misses stress (VMS) and Maximum Principal Stress (MPS) on tooth, cement layer, and endocrown restorations. VMS distribution showed a similar pattern between the models, with more stress at the load region for the right-angled endocrowns. The MPS showed that the endocrown intaglio surface and cement layer showed different mechanical responses with different filing materials and pulp chamber angles. The stress peaks plotted in the dispersion plot showed that the filling material stiffness is proportional to the stress magnitude in the endocrown, cement layer and tooth adhesive surface. In addition, the higher the pulp chamber preparation angle, the higher the stress peak in the restoration and tooth, and the lower the stress in the cement layer. Therefore, 6° and 12° pulp chamber angles showed more promising balance between the stresses of the adhesive interface structures. Under the conditions of this study, rigid filling materials were avoided to seal the orifice of root canal system when an endocrown restoration was planned as rehabilitation. In addition, the pulp chamber axial walls were prepared between 6° and 12° of divergence to balance the stress magnitude in the adhesive interface for this treatment modality.

scholarly journals Root canal filling materials in primary teeth - review

Folia Medica ◽  
2021 ◽  
Vol 63 (5) ◽  
pp. 657-662
Author(s):  
Maria Shindova
Keyword(s):  
Antimicrobial Activity ◽  
Root Canal ◽  
Primary Teeth ◽  
Filling Material ◽  
Root Canal Filling ◽  
Advantages And Disadvantages ◽  
Dental Tissues ◽  
Filling Materials ◽  
Root Canal Filling Materials ◽  
Endodontic Infections

Inadequate treatment of endodontic infections in primary teeth results in a loss of &#1072; deciduous tooth or abnormality in the development of hard dental tissues of the permanent successor. The main goal is to maintain the integrity and health of the primary tooth until their physiological exfoliation. The success of the endodontic treatment depends on the antimicrobial activity of the root canal filling material that contributes to the elimination or reduction of the microbial infection of the root canal system. The aim of this article is to systematically review the contemporary scientific literature concerning the root canal filling materials used in primary teeth. A critical evaluation of the antimicrobial activity, as well as the advantages and disadvantages of the investigated materials, has been made. Knowledge of the composition and characteristics of the available obturating materials is a useful advantage to dentists to address the functional problems associated with endodontic infections in very young patients. Future studies should also seek and compare the long-term effects of the use of traditional and alternative intracanal materials.

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