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 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

Impact of the Porosity from Incremental and Bulk Resin Composite Filling Techniques on the Biomechanical Performance of Root-Treated Molars

2021 ◽  
Author(s):  
RAS Pereira ◽  
PBF Soares ◽  
AA Bicalho ◽  
LM Barcelos ◽  
LRS Oliveira ◽  
...  
Keyword(s):  
Fracture Mode ◽  
Fracture Resistance ◽  
Composite Resin ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
High Viscosity ◽  
Composite Resins ◽  
Glass Ionomer ◽  
Pulp Chamber ◽  
Ionomer Cement

SUMMARY Objectives: To analyze the effect of the porosity caused by incremental and bulk resin composite filling techniques using low- and high-viscosity composite resins on the biomechanical performance of root-treated molars. Methods: Forty intact molars received standardized mesio-occlusal-distal (MOD) cavity preparation, were root treated, and randomly divided into four groups with different filling techniques (n=10). The first involved two incremental filling techniques using VIT/Z350XT, a nanofilled composite resin (Filtek Z350XT, 3M ESPE) associated with a resinmodified glass ionomer cement, and resin-modified glass ionomer cement (RMGIC; Vitremer, 3M ESPE) for filling the pulp chamber. The second involved TPH/VIT, a microhybrid composite resin TPH3 Spectrum associated with Vitremer. The third and fourth involved two bulk-fill composite resins: SDR/TPH, a low-viscosity resin composite (Surefill SDR flow, Dentsply) associated with TPH3 Spectrum, and POST, a high-viscosity bulkfill resin composite (Filtek Bulk Fill Posterior, 3M ESPE). The volume of the porosity inside the restoration was calculated by micro-CT. The cusp deformation caused by polymerization shrinkage was calculated using the strain-gauge and micro-CT methods. The cusp deformation was also calculated during 100 N occlusal loading and loading to fracture. The fracture resistance and fracture mode were recorded. Data were analyzed by one-way analysis of variance and Tukey test. The fracture mode was analyzed by the χ2 test. The volume of the porosity was correlated with the cusp deformation, fracture resistance, and fracture mode (α=0.05). Results: Incremental filling techniques associated with RMGIC resulted in a significantly higher porosity than that of both bulk-fill techniques. However, no significant difference was found among the groups for the fracture resistance, fracture mode, and cusp deformation, regardless of the measurement time and method used. No correlation was observed between the volume of the porosity and all tested parameters. Conclusions: The porosity of the restorations had no influence on the cuspal deformation, fracture resistance, or fracture mode. The use of the RMGIC for filling the pulp chamber associated with incremental composite resins resulted in similar biomechanical performance to that of the flowable or regular paste bulk-fill composite resin restorations of root-treated molars.

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

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 Effects of ionizing radiation on surface properties of current restorative dental materials

2021 ◽  
Vol 32 (6) ◽  
Author(s):  
Débora Michelle Gonçalves de Amorim ◽  
Aretha Heitor Veríssimo ◽  
Anne Kaline Claudino Ribeiro ◽  
Rodrigo Othávio de Assunção e Souza ◽  
Isauremi Vieira de Assunção ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Surface Properties ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Contact Angles ◽  
Glass Ionomer ◽  
Post Radiation ◽  
Restorative Dental Materials ◽  
Ionomer Cement

AbstractTo investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

scholarly journals To Evaluate Shear Bond Strength of Resin Composite to Theracal Lc, Biodentine, and Resin–Modified Glass Ionomer Cement and Mode of Fracture: An In Vitro Study

2020 ◽  
Vol 8 (02) ◽  
pp. 49-54
Author(s):  
Salil Mehra ◽  
Ashu K. Gupta ◽  
Bhanu Pratap Singh ◽  
Mandeep Kaur ◽  
Ashwath Kumar
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
Bonding Agent ◽  
Glass Ionomer ◽  
Universal Adhesive ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

Abstract Introduction The aim of the current study was to evaluate shear bond strength of resin composite bonded to Theracal LC, Biodentine, and resin-modified glass ionomer cement (RMGIC) using universal adhesive and mode of fracture. Materials and Methods A total of 50 caries-free maxillary and mandibular molars extracted were taken; occlusal cavities were prepared, mounted in acrylic blocks, and divided into five groups based on the liner used. Group 1: Biodentine liner placed into the cavity and bonding agent and resin composite applied after 12 minutes. Group 2: Biodentine liner placed into the cavity and bonding agent and resin composite applied after 14 days. Group 3: RMGIC liner placed into the cavity and bonding agent and resin composite applied immediately. Group 4: RMGIC liner placed into the cavity and bonding agent and resin composite applied after 7 days. Group 5: Theracal LC liner placed into the cavity and bonding agent and resin composite applied immediately. Each sample was bonded to resin composite using universal adhesive. Shear bond strength analysis was performed at a cross-head speed of 0.1 mm/min. Statistical Analysis  Statistical analysis was performed with one-way analysis of variance and posthoc Bonferroni test using SPSS version 22.0. Results and Conclusion Biodentine liner when bonded immediately to resin composite showed minimum shear bond strength. RMGIC when bonded to resin composite after 7 days showed maximum shear bond strength. Mode of fracture was predominantly cohesive in groups having Biodentine and Theracal LC as liner.

scholarly journals Marginal Leakage of Endodontic Temporary Restorative Materials around Access Cavities Prepared with Pre-Endodontic Composite Build-Up: An In Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1700
Author(s):  
Atsushi Kameyama ◽  
Aoi Saito ◽  
Akiko Haruyama ◽  
Tomoaki Komada ◽  
Setsuko Sugiyama ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Zinc Oxide Eugenol ◽  
Restorative Materials ◽  
Ionomer Cement

This study aimed to examine the marginal seal between various commercial temporary restorative materials and exposed dentin/built-up composite. Sixty bovine incisors were cut above the cemento-enamel junction, and half of the dentin was removed to form a step, which was built up using flowable resin composite. The root canals were irrigated, filled with calcium hydroxide, and sealed using one of six temporary sealing materials (hydraulic temporary restorative material, temporary stopping material, zinc oxide eugenol cement, glass-ionomer cement, auto-cured resin-based temporary restorative material, and light-cured resin-based temporary restorative material) (n = 10 for each material). The samples were thermocycled 500 times and immersed in an aqueous solution of methylene blue. After 2 days, they were cut along the long axis of the tooth and the depth of dye penetration was measured at the dentin side and the built-up composite side. For the margins of the pre-endodontic resin composite build-up, the two resin-based temporary restorative materials showed excellent sealing. Hydraulic temporary restorative material had a moderate sealing effect, but the sealing effect of both zinc oxide eugenol cement and glass-ionomer cement was poorer.

Biocompatibility of a Conventional Glass Ionomer, Ceramic Reinforced Glass Ionomer, Giomer and Resin Composite to Fibroblasts: In vitro Study

2013 ◽  
Vol 37 (4) ◽  
pp. 403-406 ◽  
Author(s):  
S Tamilselvam ◽  
MJ Divyanand ◽  
P Neelakantan
Keyword(s):  
Cell Viability ◽  
Mtt Assay ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Glass Ionomer ◽  
Time Periods ◽  
The Impact ◽  
Ionomer Cement

Objective: This aim of this study was at compare the fibroblast cytotoxicicty of four restorative materials - a conventional glass ionomer cement (GC Fuji Type II GIC), a ceramic reinforced glass ionomer cement (Amalgomer), a giomer (Beautifil II) and a resin composite (Filtek Z350) at three different time periods (24, 48 and 72 hours). Method: The succinyl dehydrogenase (MTT) assay was employed. Cylindrical specimens of each material (n=15) were prepared and stored in Dulbecco's modified Eagle medium, following which L929 fibroblasts were cultured in 96 well plates. After 24 hours of incubation, the MTT assay was performed to detect the cell viability. The method was repeated after 48 and 72 hours. The impact of materials and exposure times on cytotoxicity of fibroblasts was statistically analyzed using two way ANOVA (P=0.05). Results: Both time and material had an impact on cell viability, with giomer demonstrating the maximum cell viability at all time periods. The cell viability in the giomer group was significantly different from all other materials at 24 and 72 hours (P&lt;0.05), while at 48 hours giomer was significantly different only with resin composite (P&lt;0.05). Conclusions: Giomers showed better biocompatibility than conventional and ceramic reinforced glass ionomer cements and, resin composite. Ceramic reinforced glass ionomer demonstrated superior biocompatibility compared to conventional glass ionomer.

scholarly journals Shear Bond Strength Evaluation of Resin Composite Bonded to GIC Using Three Different Adhesives

2009 ◽  
Vol 34 (4) ◽  
pp. 467-471 ◽  
Author(s):  
V. Gopikrishna ◽  
M. Abarajithan ◽  
J. Krithikadatta ◽  
D. Kandaswamy
Keyword(s):  
Bond Strength ◽  
Clinical Relevance ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Strength Evaluation ◽  
Ionomer Cement

Clinical Relevance The bond strength of resin composite to glass-ionomer cement can be enhanced when a self-etching primer is employed over unset GIC or when a glass-ionomer based adhesive is employed over set GIC when compared to using a total-etch adhesive.

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