Influence of ultrasonic excitation on microhardness of glass ionomer cement

2020 ◽  
Vol 28 (6) ◽  
pp. 587-592
Author(s):  
Navara Tanweer ◽  
Rizwan Jouhar ◽  
Muhammad Adeel Ahmed
Keyword(s):  
Glass Ionomer Cement ◽  
Surface Hardness ◽  
Hardness Test ◽  
Glass Particle ◽  
P Value ◽  
Glass Ionomer ◽  
Group I ◽  
Group Ii ◽  
The Difference ◽  
Ionomer Cement

BACKGROUND: Numerous researchers have attempted to improve the mechanical properties of glass ionomer cement since 1972. In this study, ultrasonic curing treatment was introduced during the mixing of glass ionomer cement (GC Fuji IX) to facilitate intimate mixing, compaction and adaptation of residual glass particle which consequently improves densification of the material. OBJECTIVE: To assess the influence of ultrasonic treatment on the microhardness of glass ionomer cement (GC Fuji IX) and compare it with the conventionally cured method. METHODS: A total of 40 specimens (2 × 2 mm) were fabricated and equally divided into two groups: Group I (conventional curing method) and Group II (ultrasonically cured). For Group II, an ultrasonic scaler was used which provides energy to ensure proper mixing of material without leaving any air bubbles or unmixed particles. Vicker’s hardness test was employed to generate the average microhardness values by making three indentations at different points on each specimen. Statistical Package for Social Sciences (SPSS) Version 17 was used, employing independent samples T test to compare the difference in microhardness values between two curing groups. RESULTS: The average surface hardness value for conventional cured GIC was 62.21 ± 13.61 while ultrasonically cured GIC exhibited a higher mean microhardness value of 66.37 ± 12.83. Additionally, the average microhardness values produced by the two groups showed statistically significant differences (p value < 0.035). CONCLUSION: Ultrasonic excitation treatment leads to intimate mixing and accelerated hardening of glass ionomer cement thereby enhancing its microhardness and reducing early weakness.

scholarly journals Effects of a glass-ionomer cement on the remineralization of occlusal caries: an in situ study

2006 ◽  
Vol 20 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Mônica Tostes Amaral ◽  
Antônio Carlos Guedes-Pinto ◽  
Orlando Chevitarese
Keyword(s):  
Glass Ionomer Cement ◽  
Knoop Hardness ◽  
Glass Ionomer ◽  
In Situ Study ◽  
Group I ◽  
Oral Environment ◽  
Group Ii ◽  
Pits And Fissures ◽  
Ionomer Cement

This work evaluated the remineralization of demineralized enamel of pits and fissures of human third molars sealed with a glass ionomer cement (Fuji IX, GC Corporation - Japan) or with a Bis-GMA sealant (Delton - Dentsply). Ten volunteers participated in this in situ study that consisted of two thirty-day periods using intra-oral devices, with a week’s interval in between. Four experimental treatment procedures and one control were randomly assigned to the volunteers’ specimens: Group I, no treatment, control; Group II, artificial caries process; Group III, same treatment as Group II, but sealed with Delton (Dentsply); Group IV, same treatment as Group II, but sealed with Fuji IX (GC Corporation - Japan); Group V, same treatment as Group II and no sealing. Groups I and II were not submitted to the oral environment and served as controls. After a period of 30 days in the oral environment, the specimens were removed from the devices, embedded in acrylic resin, ground flat and polished. Then, Knoop hardness tests were performed, with a 25 g static load applied for 15 seconds. The measurements were made from the base of the fissure up to an opening of 600 µm, pre-established between the inclines of the cusps. Three indentations were then made, located at 25, 75, and 125 µm in depth from the outer enamel margin and 100 µm apart from each other (Micromet 2003). The Brieger F and Bonferroni’s tests were applied to the measurements. It was concluded that sealing with the glass ionomer cement Fuji IX was capable of making the enamel of pits and fissures more resistant by increasing the value of Knoop hardness.

scholarly journals PENGARUH PENUND AAN TAHAP PENUMPATAN DENGAN RESIN KOMPOSIT PADA TEKNIK SANDWICH TERHADAP KEKUATAN TARIK PELEKATAN SEMEN IONOMER KACA DAN RESIN KOMPOSIT

2016 ◽  
Vol 1 (1) ◽  
pp. 46
Author(s):  
Yulita Kristanti ◽  
Diatri Nari Ratih
Keyword(s):  
Tensile Strength ◽  
Composite Resin ◽  
Artificial Saliva ◽  
Glass Ionomer Cement ◽  
Filling Material ◽  
Glass Ionomer ◽  
Sandwich Technique ◽  
Group I ◽  
Group Ii ◽  
Ionomer Cement

Sandwich technique, a combination filling technique using composite resin filling material and glass ionomer cement has been widely used. In fact, such a combination filling technique need  ffcf i longer time compare to filling without combination. This research was done in order to know the influence of delayed fill ; ing in sandwich technique using composite resin related to the tensile strength between glass ionomer cement and composite resin.The materials studied consist of 16 samples, that were divided into 4 groups. The first one was used as the control groupt without delaying), while group II-IVwas used as the treating groups. Each group consist of 4 samples. The difference treatment between group II-IVwas the soaking time in the artificial saliva. Group II was soaked into artificial saliva (pH5)for 1 day, group , HI for 7 days, and group IVfor 14 days. The result of this research shows that the diference among the groups involved were very significant, except between group I and group II.The longer the sample was soaked into the artificial saliva, the tensile strength tends to decrease.

scholarly journals Evaluation of marginal fit and microleakage of monolithic zirconia crowns cemented by bio-active and glass ionomer cements: In vitro study

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Radwa Hamdy Aboelenen ◽  
Ashraf Mokhtar ◽  
Hanaa Zaghloul
Keyword(s):  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Marginal Gap ◽  
Marginal Fit ◽  
Group I ◽  
Significant Difference ◽  
Zirconia Crowns ◽  
Monolithic Zirconia ◽  
Ionomer Cement ◽  
Gap Values

Objective: To evaluate the marginal fit and microleakage of monolithic zirconia crowns cemented with bioactive cement (Ceramir) compared to that cemented with glass ionomer cement and to evaluate the effect of thermocycling on marginal fit. Materials and methods: Twenty sound human molar teeth were prepared to receive a monolithic zirconia crowns. Teeth were divided randomly into two equal groups according to the type of luting cement. Group I: glass ionomer cement and group II: Ceramir cement. After cementation, the vertical marginal gap was assessed by using stereomicroscope before and after thermocycling. Twenty equidistant measurement points were taken for each crown. Leakage assessment was carried out using Fuchsin dye penetration followed by digital photography under a stereomicroscope. Data were analyzed by Mann-Whitney U test to compare between the two luting cements. Wilcoxon signed-rank test was used to evaluate the effect of thermocycling on the marginal fit (P ≤ 0.05)
Results: Whether before or after thermocycling, the results showed no significant difference between the marginal gap values of the two tested groups. For both groups, there was a significant increase in marginal gap values after thermocycling. Also, there was no significant difference between leakage scores of the two tested groups. Conclusions: Similarity in the physical properties and chemical composition of the two cements result in a non- significant effect on the vertical marginal fit and the extent of microleakage of translucent zirconia crowns.  Thermocycling had a negative impact on the vertical marginal gap of the two tested luting agents.

Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins

2004 ◽  
Vol 5 (4) ◽  
pp. 42-49 ◽  
Author(s):  
Yusuf Ziya Bayindir ◽  
Mehmet Yildiz
Keyword(s):  
Glass Ionomer Cement ◽  
Water Storage ◽  
Surface Hardness ◽  
Composite Resins ◽  
Bottom Surface ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Hardness Values ◽  
Ionomer Cement

Abstract In this study the top and bottom surface hardness of two polyacid-modified composite resins (PMCRs), one resin-modified glass ionomer cement (RMGIC), and one composite resin were evaluated. The affect of water storage on their hardness was also investigated. The study was conducted using four different groups, each having five specimens obtained from fiberglass die molds with a diameter of 5 mm and a height of 2 mm. Measurements were made on the top and bottom surface of each specimen and recorded after 24 hours and again at 60 days. All tested materials showed different hardness values, and the values of top surfaces of the specimens were found to be higher than the bottom surface in all test groups. There was no statistical difference in the Vickers hardness (HV) values when the test specimens were kept in water storage. In conclusion Hytac displayed microhardness values higher than Vitremer and Dyract. We found the order of HV values to be Surfil > Hytac > Dyract > Vitremer, respectively. Vitremer presented the lowest microhardness level and Surfil the highest. Citation Bayindir YZ, Yildiz M. Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins. J Contemp Dent Pract 2004 November;(5)4:042-049.

scholarly journals A traditional way to combat against Streptococcus mutans

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Prabhakar A R ◽  
Rekhamani Maganti ◽  
Mythri P ◽  
Saraswathi V Naik
Keyword(s):  
Streptococcus Mutans ◽  
Curcuma Longa ◽  
Glass Ionomer Cement ◽  
Control Group ◽  
Age Group ◽  
Glass Ionomer ◽  
Group Iii ◽  
Group Ii ◽  
Group 5 ◽  
Ionomer Cement

Purpose: This study was conducted to evaluate and compare the antimicrobial activity of conventional Glass ionomer cement, Glass ionomer cement (GIC) with 0.1% (w/w) epigallocatechin-3-gallate (EGCG) and Glass ionomer cement with 1% (w/w) Curcuma longa against streptococcus mutans.Methods: Children of age group 5-9 years, irrespective of sex, race and socioeconomic status with at least 3 cavitated dentinal lesions in primary molars clinically involving occlusal surface suitable for ART were selected.The dentinal samples were collected three times from each carious tooth, viz. baseline (before excavation of caries), after hand excavation of caries and after 7 days of restoration. The dentinal samples were subjected to microbiological evaluation for Streptococcus mutans count.Results: Experimental groups (Group II and group III) showed statistically significant reduction in Streptococcus mutans counts compared to control group (Conventional Glass ionomer cement). Group II i.e. (Glass ionomer cement with 0.1% (w/w) EGCG) showed significant reduction than Group III i.e. (Glass ionomer cement with 1% (w/w) Curcuma longa).Conclusion: ART technique was successful in reducing the streptococcus mutans load in a carious cavity but significant numbers of residual microbes were still found to be present even after the carious tissue was removed. Restoration of the cavity using EGCG and turmeric modified GIC was able to markedly reduce the S.mutans counts compared to conventional GIC. 

scholarly journals Evaluation of efficacy of bupivacaine and bupivacaine plus clonidine in transversus abdominis plane (TAP) block for postoperative analgesia: a prospective, randomized, double blind, comparative study

2017 ◽  
Vol 5 (10) ◽  
pp. 4588 ◽  
Author(s):  
Tauqeer Anjum Mir ◽  
Aabid Hussain Mir ◽  
Tantry Tariq Gani ◽  
Abida Yousuf ◽  
Sheikh Irshad Ahmad
Keyword(s):  
Postoperative Analgesia ◽  
Transversus Abdominis ◽  
P Value ◽  
Tap Block ◽  
Transversus Abdominis Plane ◽  
Rescue Analgesia ◽  
Group I ◽  
Group Ii ◽  
The Difference

Background: Pain is the commonest symptom encountered postoperatively and hence multimodal analgesia is tried to overcome it. In this study, we have compared bupivacaine and bupivacaine plus clonidine in transversus abdominis plane (TAP) block for postoperative analgesia in patients undergoing lower abdominal surgeries under spinal anaesthesia.Methods: Sixty ASA I and II patients in the age range of 18-60 years undergoing various lower abdominal surgeries were randomly divided into two groups, who were operated after giving spinal block using 2.5 ml of 0.5% hyperbaric bupivacine and 25ug of fentanyl. At the end of surgical procedure tranversus abdominis plane (TAP) block was given by giving 25 ml of injection bupivacaine 0.25% in group I and 25 ml of 0.25% of bupivacaine with 1 ug.kg-1 of clonidine in group II. Quality of analgesia was assessed by visual analogue scale (VAS), categorical pain scoring system and frequency of rescue analgesia given and duration was assessed with the time at which first rescue analgesia was given. Side effects of clonidine such as sedation, bradycardia and hypotension were also noted. The hemodynamic parameters like heart rate (HR), systolic blood pressure (SBP) and diastolic blood pressure (DBP) were noted for both the groups.Results: Demographic characteristics like age, weight, sex, ASA class and type of surgeries were comparable in both groups. SBP, DBP and HR were less in group II than in group I and was statistically significant (p-value<0.05). The overall mean VAS score in group I was 3.03 ± 1.57 and group II was 1.72 ± 1.02 with p-value of 0.0005 and hence better quality of analgesia in group II. Categorical pain scoring system also showed statistically better scores in group II than group I. The duration of analgesia which was calculated by mean time for first rescue analgesia in group I was 6.38 ± 2.56 hours and group II was 14.23 ± 4.63 hours with a p-value of <0.0001 and the difference was statistically significant. The mean number of doses of rescue analgesia in group I for the first 24 hours was 1.37 ± 0.89 and in group II was 0.60 ± 0.62 with a p-value of 0.0003 and the difference was statistically significant. Group II patients showed more sedation scores than group I patients (p-value <0.05). None of the patients had any episode of bradycardia or hypotension.Conclusions: Addition of clonidine 1 ug.kg-1 to 25 ml of 0.25% bupivacaine compared to 25 ml of 0.25% bupivacaine alone in tranverse abdominis plane (TAP) block improves quality of analgesia, increases duration of postoperative analgesia and decreases postoperative analgesic requirements with minimal side effects.

scholarly journals The Effect of Addition of Triclosan Antibacterial Agent on The Setting Time of Glass Ionomer Cement

2018 ◽  
Vol 7 (1) ◽  
pp. 18
Author(s):  
Egi Utia Asih ◽  
Martha Mozartha ◽  
Billy Sujatmiko
Keyword(s):  
Antibacterial Agent ◽  
Setting Time ◽  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Physical And Mechanical Properties ◽  
Control Group ◽  
P Value ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Ionomer Cement

Glass ionomer cement (GIC), restorative material in dentistry, are composed of glass powders and polyacrylic acid. GIC can release fluoride that acts as an antibacterial. Various study had been conducted to improve that antibacterial properties, but it can affect the physical and mechanical properties of GIC. The purpose of this study was to determine the effect of addition of triclosan antibacterial agent on the setting time of GIC. To obtain 2.5 % triclosan, 0,25 gram of triclosan powder was mixed into 9,75 gram of GIC powder. The sample was divided into 2 groups: control group (n=16) and treatment group (n=16). The setting time was measured using gilmore needle, by penetrating a needle to the surface of specimens with an interval of 10 seconds until the needle left no traces on the surface of specimens. Statistical analysis was done byT-test. The result showed that p value > 0,05. The conclusion is the addition of triclosan antibacterial agent do not affect the setting time of GIC

scholarly journals Clinical Evaluation of Glass-Lonomer Cement and Giomer for the Management of Cervical Caries

2021 ◽  
Vol 20 (2) ◽  
pp. 60-64
Author(s):  
Nurun Nahar ◽  
Tareq Hassan ◽  
Mohammed Kamal Uddin
Keyword(s):  
Patient Group ◽  
Glass Ionomer Cement ◽  
P Value ◽  
Filling Material ◽  
Glass Ionomer ◽  
Secondary Caries ◽  
History Of ◽  
Group 2 ◽  
Ionomer Cement ◽  
Group 1

Background: Giomer is a unique class of restorative material has been introduced as the true hybridization of Glass Ionomer (GI) and composite resin and has the distinguishing feature of a stable surface pre-reacted glass ionomer. Glass Ionomer Cements (GIC) are also unique restorative materials with many uses in clinical practice and provide for caries-protective fluoride releasing at the margins of restorations, as well as their ability to have the fluoride within their chemical matrix recharged by outside exposure to other fluoride-containing materials. The present study aim at clinically evaluate the comparison between the glass Ionomer cement and Giomer for the management of cervical caries. Materials and methods: The study was a cross sectional comparative study which was carried out from 01 December 2018 to 31 November 2019 in the Department of Conservative Dentistry and Endodontics, Bangladesh Dental College, Dhanmondi, Dhaka. Total number of cases was 80. The patients were divided into two groups, half of the patient (Group-1) was treated with Glass Ionomer cement and half of the patient (Group-2) was treated with Giomer restoration. The post-operative sensitivity discoloration, dislodgement of filling material and secondary caries formation were recorded. All the patients were assigned and the data were analyzed statistically by SPSS version 21. p-value < 0.05 was taken as significant. Results: The study reveals 60% of the study population was within 41 to 50 years of age group (Group-1) and 62.5% were 51 to 60 years (Group-2) 45% in (Group-1) and 10% in (Group-2) had history of post filling sensitivity, 12% in (Group-1) and 5% in (Group-2) had discoloration after restoration, 2.5% had history of dislodgement of the filling in (Group-1), no history of dislodgement of the filling in (Group-2), 2.5% had history of secondary caries formation in (Group-1) and no history of Secondary caries formation in (Group-2). Conclusion: Patients were more approachable for Giomer restoration than Glass ionomer for the management of cervical caries over a period of 12 month. Chatt Maa Shi Hosp Med Coll J; Vol.20 (2); July 2021; Page 60-64

Frequency of Post Dural Puncture Headache with Quincke 25g and Quincke 27g Spinal Needle after Spinal Anaesthesia

2021 ◽  
Vol 15 (11) ◽  
pp. 3116-3118
Author(s):  
Gulsher . ◽  
Riffat Zahid ◽  
Syed Mehmood Ali ◽  
Muhammad Naveed Shahzad ◽  
Amer Latif ◽  
...  
Keyword(s):  
Spinal Anesthesia ◽  
Dural Puncture ◽  
P Value ◽  
Chi Square ◽  
Post Dural Puncture Headache ◽  
Group I ◽  
Chi Square Test ◽  
Randomized Control ◽  
Group Ii ◽  
The Difference

Objective: To compare the frequency of post dural puncture headache with Quincke 25G and Quincke 27G of spinal needles for spinal anesthesia. Design of the Study: It’s a Randomized control trial. Study Settings: This study was carried out Department of anesthesiology and Intensive Care Unit, Shaikh Zayed Hospital Lahore from 29-08-2020 to 01-03-2021. Material and Methods: In this prospective study 100 patients were enrolled who were decided to undergo spinal anesthesia. Two groups were made by randomization. In patients of group I, anesthesia was administered by using 25G quincke needle while 27G quincke needle was used for patients in group II. Evaluation of patients was with regard to development of postoperative PDPH within 3-days. Groups were compared by using Chi-square test and a P-value<0.05 was taken statistically significant. Results of the Study: PDHD was seen in 14 (28%) patients in group I and in 4 (8%) patients in group II. Statistically, the difference between the two groups was significant (p<0.05).. Conclusion: Due to less frequency of PDPH with 27G needle, it should be given preference for applying spinal anesthesia over 25G needle. Keywords: Spinal anesthesia, post dural puncture headache; quincle needle.

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