scholarly journals SETTING TIME, FLOWABILITY, AND SOLUBILITY OF EPOXY RESIN-BASED SEALER MIXED WITH CHITOSAN NANOPARTICLES

2021 ◽  
pp. 122-126
Author(s):  
DIATRI NARI RATIH ◽  
RARAS AJENG ENGGARDIPTA ◽  
ADI NUGROHO HENDRO KUSUMO ◽  
WIGNYO HADRIYANTO
Keyword(s):  
Epoxy Resin ◽  
Setting Time ◽  
Chitosan Nanoparticles ◽  
Solubility Test ◽  
Significant Difference ◽  
Before And After ◽  
Press Method ◽  
Group 2 ◽  
Scanning Electron ◽  
Group 1

Objective: The purpose of this study was to investigate the effect of the incorporation of chitosan nanoparticles into epoxy resin-based sealer on its setting time, flowability and solubility.  Methods: This study was divided into three evaluations: setting time, flowability, and solubility of sealers. Each study used 20 samples, which were divided into two groups. Group 1, epoxy resin-based sealers, and group 2, epoxy resin-based sealers mixed with chitosan nanoparticles. The Gilmore needle was used to observe the setting time, a simple press method based on ISO 6876 was employed to evaluate the flowability of the sealer, and the solubility test, which was according to ISO 6876 standard, was used to determine the solubility of sealers. The surface structure of the sealers before and after the solubility test was observed under Scanning Electron Microscopy (SEM). The data obtained from each study were analyzed by an unpaired t-test with a degree of significance of 95%. Results: The results showed that the setting time of epoxy resin and epoxy resin incorporated with chitosan were 567±30.20 and 572.5±27.91 min, flowability was 25.06±0.89 and 23.18±1.06 mm, and solubility was 0.0051%±0.0016 and 0.0045%±0.0018, respectively. No significant difference occurred between epoxy resin-based sealer and epoxy resin-based sealer mixed with chitosan nanoparticles in setting time, flowability, and solubility of sealers (*P>0.05).  Conclusion: The incorporation of chitosan nanoparticles produced a similar effect in setting time, flowability, and solubility as the epoxy resin-based sealer. Thus, epoxy resin-based sealer mixed with chitosan nanoparticles had acceptable properties in setting time, flowability, and solubility based on ISO 6876 standards.

scholarly journals Scanning Electron Microscopy Analysis of the Anterior Capsulotomy Edge: A Comparative Study between Femtosecond Laser-Assisted Capsulotomy and Manual Capsulorhexis

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Daniele Tognetto ◽  
Chiara De Giacinto ◽  
Alberto Armando Perrotta ◽  
Tommaso Candian ◽  
Alessandro Bova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Femtosecond Laser ◽  
Comparative Study ◽  
Surface Irregularity ◽  
Significant Difference ◽  
Group 2 ◽  
Cut Surface ◽  
Scanning Electron ◽  
Group 1

Purpose. To compare the capsule edges ultrastructure obtained by two femtosecond laser-assisted cataract surgery (FLACS) platforms and manual continuous curvilinear capsulorhexis (CCC) using scanning electron microscopy (SEM). Setting. Eye Clinic, University of Trieste, Italy. Design. Experimental comparative study. Methods. 150 anterior capsules were collected and divided into three groups as follows: Group 1 (50 capsules) obtained with manual CCC, Groups 2 and 3 (each with 50 capsules) obtained with the Catalys Laser and the LenSx Laser, respectively. All samples were imaged by means of SEM and regularity of the cut surface, and thickness of the capsule edge were evaluated and compared. Results. All femtosecond laser (FSL) capsules were perfectly circular, whereas some alteration of the circular shape was observed in the manual ones. Group 1 showed a smooth and regular capsule edge without any surface irregularity, conversely Groups 2 and 3 showed postage-stamp perforations on the capsule edge. The cut surface irregularity value in Group 2 was 1.4 ± 0.63, while it was 0.7 ± 0.49 in Group 3 (p<0.05). Group 1 had a significantly lower thickness of the capsule edge than the FSL groups (p<0.05). No statistically significant difference in the capsule edge thickness between the FSL groups was found (p=0.244). Conclusions. Despite the presence of slight cut surface irregularities, both FSL capsulotomies showed a better geometry and circularity than the manual ones. Capsulotomy specimens obtained using both FSL capsulotomies showed laser-induced alterations of the capsule edge when compared with smooth and regular edges obtained using manual CCC.

Attitude of the Canine in Secondary Bone-Grafted and Nongrafted Patients with Cleft Lip and Palate

2005 ◽  
Vol 42 (6) ◽  
pp. 679-686 ◽  
Author(s):  
Enkhtuvshin Gereltzul ◽  
Yoshiyuki Baba ◽  
Kimie Ohyama
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Panoramic Radiography ◽  
Control Groups ◽  
Significant Difference ◽  
Before And After ◽  
Group 2 ◽  
Two Stages ◽  
And Control ◽  
Group 1

Objective To investigate the eruption pattern of the cleft-side canine regarding its pre-eruption position relative to the cleft in bone-grafted (BG) and nongrafted (NonBG) patients with cleft lip and palate. Methods Fifty-three patients with cleft lip and palate (21 BG, 32 NonBG) were examined by panoramic radiography and posteroanterior cephalography taken before and after canine eruption. Subjects were categorized into BG, NonBG, and control groups. Canines at the pre-eruption stage were categorized as close to (group 1) or distant from (group 2) the cleft area. The canine angle and its change between the two stages were evaluated. Results No significant differences were noted between the initial canine angle of the BG and NonBG groups. Although canines in the BG group erupted without a significant change in angle, the canine angle increased significantly (p < .0001) in the NonBG and control groups. In group 1, a greater change in canine angle was noted in the NonBG (p < .05) and control (p < .01) groups than in the BG group. In group 2, no significant difference was noted among the three groups. Conclusions In BG patients, a canine located near the cleft appears to erupt at the same angle as it had before grafting. However, in NonBG patients, it erupts more vertically, guided by cortical bone. For canines distant from the cleft area, there is no significant difference in the change in angulation between NonBG and BG patients.

scholarly journals Orthosiphon versus Placebo in Nephrolithiasis with Multiple Chronic Complaints: A Randomized Control Trial

2009 ◽  
Vol 6 (4) ◽  
pp. 495-501 ◽  
Author(s):  
Amorn Premgamone ◽  
Pote Sriboonlue ◽  
Srinoi Maskasem ◽  
Wattana Ditsataporncharoen ◽  
Bungornsri Jindawong
Keyword(s):  
Myofascial Pain ◽  
White Blood Cells ◽  
Analog Scale ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
Randomized Control ◽  
Group 2 ◽  
Primary Measure ◽  
Group 1

Nephrolithiasis in the communities of Northeast Thailand frequently presents with multiple chronic health complaints, i.e. myofascial pain, back pain, dyspepsia, arthralgia, headache, fatigue, frank paresthesia, dysuria and any of these aggravated by purine-rich food (PRF). We assessed the efficacy of Orthosiphon in treating subjects with at least two active symptoms and negative for urine white blood cells. Subjects were randomly allocated to two groups. Crude extract of Orthosiphon given in a capsule (equivalent to 1.6–1.8 g of dried leaves of Orthosiphon) two times a day to Group 1 (n= 36) and a placebo to Group 2 (n= 40) for 14 days. The medication for each subject was packed and its code kept secret until the data analysis. Both groups were asked not to consume any of 25 purine-rich foods (PRFs) during treatment. The primary measure was the reduced sum of active severity symptoms as recorded using the visual analog scale before and after therapy (i.e. on day 7 and 14). The data on 76 subjects were processed. The mean of the total scores (95% CI) of the symptoms in each group were decreased significantly (P< 0.001); 185.6 (153.3, 218.0) to 94.7 (58.2, 131.2) in the Orthosiphon group and 196.1 (164.4, 227.8) to 89.6 (62.8, 116.5) in the placebo group. When comparing between groups, no statistically significant difference was found. The mean consumption in PRFs was significantly decreased (P< 0.001) in both groups; however, Orthosiphon did not have additional benefit over placebo at 7 and 14 days of treatment during which they reduced these foods.

scholarly journals PELATIHAN LONCAT NAIK TURUN TRIBUN DAN PELATIHAN LONCAT NAIK TURUN BANGKU MENINGKATKAN DAYA LEDAK OTOT TUNGKAI PADA PESERTA EKSTRA KURIKULER BOLA VOLI PUTRA SMA NEGERI 1 TEGALLALANG

2019 ◽  
Author(s):  
I Putu Agus Budi Sudarsana ◽  
J. Alex Pangkahila ◽  
Bagus Komang Satriyasa ◽  
Wayan Weta ◽  
I Nengah Sandi ◽  
...  
Keyword(s):  
High School ◽  
T Test ◽  
P Value ◽  
Public High School ◽  
Jump Training ◽  
Explosive Power ◽  
Significant Difference ◽  
Before And After ◽  
Group 2 ◽  
Group 1

ABSTRACTThis study was conducted to determine the increase in limb muscle explosive power. The training was conducted with 5 reps of 3 sets over six weeks in the field of Tegallalang 1 Public High School starting at 17.00 WITA until completion. In this study using 2 groups, namely the 1st group given jump training up and down the stands, the 2nd group was given jump training up and down the bench. The sample for each group is 8 people who have met the requirements of the male volleyball extra-curricular participants of Tegallalang 1 Public High School. Data from leg muscle explosive results obtained from 3 jumps taken before and after training. The results obtained before and after the Group-1 training were 57.5 cm to 70.875 cm and Group-2 were 57.375 cm to 65.75 cm. Hypothesis testing uses an independent t-test at a significance limit of 0.05 (p <0.05). Based on the differences in the results of the intergroup test analysis using independent t-test obtained group-1 and group-2 for p = 0.935 which showed no significant difference before being given treatment with a p value greater than 0.05. Whereas after treatment the group-1 and group-2 were obtained at p = 0.007 which showed a significant difference between groups 1 and 2 groups with a p value smaller than 0.05. It can be concluded that jumping up and down the stands is more effective than jump training up and down the bench in increasing the explosive power of the leg muscles. For this reason, it is expected that sports coaches to apply jumping up and down the stands as an alternative in increasing athletes' explosive power.Keywords: Training jumping up and down the stands, training jumping up and down the bench, explosive muscle power.

scholarly journals Evaluation of sealing between abutment and inner connection of cone morse dental implant

2018 ◽  
Author(s):  
Derivaldo Moura Gois Filho ◽  
Vanessa Tavares de Gois-Santos ◽  
Ronaldo Santos Silva ◽  
Antônio Carlos Marqueti ◽  
Arthur Rodriguez Gonzalez Cortes ◽  
...  
Keyword(s):  
Dental Implants ◽  
Treatment Success ◽  
In Vitro Study ◽  
Study Results ◽  
Significant Difference ◽  
Group 2 ◽  
Dental Abutments ◽  
Scanning Electron ◽  
Group 1

Introduction: The adaptation of prostheses fixed over implants involves biomechanical aspects that are directly associated with treatment success. Objective: The aim of this in vitro study was to evaluate the presence of microgaps in the abutment/inner connection interface of cone morse dental implants. Materials and methods: Two groups of implants were analyzed. The first group (n = 16) employed single-manufacturer dental implants and abutments, whereas the second group (n = 16) combined multi-manufacturer materials. The sets were analyzed through scanning electron mi­croscopy, wherein microgaps between the implant connection and the abutment were observed. Results: Group 1 had an average microgap of 5.69 μm (SD ± 8.46 μm). Group 2 had an average microgap of 1.24 μm (SD ± 0.44 μm). A significant difference was found between the two groups (p = 0.002). Conclusion: Within the limitations of this study, results suggest that the group formed by multi-manufacturer implants and abutments (group 2) had smaller microgap values, and, therefore, a higher in vitro adaptation of components. DESCRIPTORS | Dental Implants; Dental Abutments; Scanning Electron Microscopy.

Evaluation of cranial tibial and extensor carpi radialis reflexes before and after anesthetic block in cats

2016 ◽  
Vol 19 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Eduardo Alberto Tudury ◽  
Marcella Luiz de Figueiredo ◽  
Thaiza Helena Tavares Fernandes ◽  
Bruno Martins Araújo ◽  
Marília de Albuquerque Bonelli ◽  
...  
Keyword(s):  
Brachial Plexus Block ◽  
Neurologic Examination ◽  
Anesthetic Induction ◽  
Significant Difference ◽  
Before And After ◽  
Reflex Arc ◽  
Group 2 ◽  
Plexus Block ◽  
Extensor Carpi Radialis ◽  
Group 1

Objectives This study aimed to test the extensor carpi radialis and cranial tibial reflexes in cats before and after anesthetic block of the brachial and lumbosacral plexus, respectively, to determine whether they depend on a myotatic reflex arc. Methods Fifty-five cats with a normal neurologic examination that were referred for elective gonadectomy were divided into group 1 (29 cats) for testing the extensor carpi radialis reflex, and group 2 (26 cats) for testing the cranial tibial reflex. In group 1, the extensor carpi radialis reflex was tested after anesthetic induction and 15 mins after brachial plexus block with lidocaine. In group 2, the cranial tibial, withdrawal and patellar reflexes were elicited in 52 hindlimbs and retested 15 mins after epidural anesthesia. Results In group 1, before the anesthetic block, 55.17% of the cats had a decreased and 44.83% had a normal extensor carpi radialis reflex. After the block, 68.96% showed a decreased and 27.59% a normal reflex. No cat had an increased or absent reflex before anesthetic block. In group 2, prior to the anesthetic block, 15.38% of the cats had a decreased cranial tibial reflex and 84.62% had a normal response, whereas after the block it was decreased in 26.92% and normal in 73.08% of the cats. None of the cats had an increased or absent reflex. Regarding the presence of both reflexes before and after anesthetic block, there was no significant difference at 1% ( P = 0.013). Conclusions and relevance The extensor carpi radialis and cranial tibial reflexes in cats are not strictly myotatic reflexes, as they are independent of the reflex arc, and may be idiomuscular responses. Therefore, they are not reliable for neurologic examination in this species.

Enamel Deproteinization before Acid Etching – A Scanning Electron Microscopic Observation

2010 ◽  
Vol 35 (2) ◽  
pp. 169-172 ◽  
Author(s):  
Bhoomika Ahuja ◽  
Ramakrishna Yeluri ◽  
M Sudhindra Baliga ◽  
AK Munshi
Keyword(s):  
Phosphoric Acid ◽  
Sem Analysis ◽  
Enamel Surface ◽  
Electron Microscopic ◽  
Etching Pattern ◽  
Significant Difference ◽  
Scanning Electron Microscopic ◽  
Group 2 ◽  
Scanning Electron ◽  
Group 1

Objectives: This study was undertaken to evaluate the topographical features of enamel surface deproteinized with sodium hypochlorite (NaOCl) and etched with phosphoric acid (H3PO4) compared to phosphoric acid alone using Scanning Electron Microscopic (SEM) Analysis. Study Design: 30 enamel blocks of 1mm2 from ten human sound extracted permanent molars were obtained and treated as under: Group 1 (10 blocks): Enamel surface was etched with 37% H3PO4 gel for 15 seconds. Group 2 (10 blocks):Enamel surface was treated with 5.25% NaOCl for 60 seconds and then etched with 37% H3PO4 gel for 15 seconds. 10 enamel blocks were included in the control group where no treatment was carried out. The samples were subjected to SEM analysis and 5 microphotographs of each sample were obtained at 500X magnification and evaluated for the quality of etching pattern of the enamel in percentage (%) using Auto-CAD 2007 software. Results: Mean values of etching pattern in Group 1 being 55.76% and Group 2 being 53.58%. No significant difference was observed between the two groups. Conclusion: The use of 37% phosphoric acid for 15 seconds still remains the best method for pretreatment of enamel.

scholarly journals Saliva Contamination Effect on Shear Bond Strength of Self-etching Primer with Different Debond Times

2007 ◽  
Vol 77 (5) ◽  
pp. 901-906 ◽  
Author(s):  
Tamer Turk ◽  
Selma Elekdag-Turk ◽  
Devrim Isci ◽  
Fethiye Cakmak ◽  
Nurhat Ozkalayci
Keyword(s):  
Control Group ◽  
Group 4 ◽  
Contamination Effect ◽  
Significant Difference ◽  
Before And After ◽  
Group 3 ◽  
Bond Strengths ◽  
Group 2 ◽  
Saliva Contamination ◽  
Group 1

Abstract Objective: To evaluate shear bond strengths (SBSs) of a self-etching primer (SEP) following saliva contamination at different stages of bonding at debond times of 5, 15, and 30 minutes and 24 hours. Materials and Methods: Two-hundred forty human premolars were divided into four groups: group 1, uncontaminated; group 2, saliva contamination after priming; group 3, saliva contamination before priming; and group 4, saliva contamination before and after priming. Four subgroups according to debond times of 5, 15, 30 minutes and 24 hours were composed. Metal brackets were bonded with an SEP (Transbond Plus) and light-cure adhesives paste (Transbond XT). SBS values and the adhesive remnants were determined. Results: The highest SBS was obtained at a debond time of 24 hours for the control group. This was significantly different from the other groups. SBSs at 5, 15, and 30 minutes showed no significant difference from each other in the control group (P &gt; .05). Lowest SBSs were obtained at a debond time of 5 minutes for groups 1, 2, 3, and 4 (8.38, 7.10, 7.06, and 6.26 MPa, respectively) and were not significantly different from each other (P &gt; .05). SBSs at 24 hours were not significantly different from each other for groups 2, 3, and 4 (P &gt; .05). Significant differences were found in the adhesive remnant (P &lt; .001). Conclusions: SEP (Transbond Plus) may produce clinically acceptable bracket bonding after 5, 15, and 30 minutes from time of placement on the teeth, even with light and heavy saliva contamination.

scholarly journals PENGARUH PEMBERIAN ULTRASOUND THERAPY DAN NEUROMUSCULAR TAPING DALAM MENINGKATAN AKTIVITAS FUNGSIONAL PADA KASUS OSTEOARTHRITIS LUTUT

2019 ◽  
Author(s):  
Trisna Narta Dewi, A.A.N ◽  
Yudi Pramana ◽  
Eka Septian Utama, A.A.Gd ◽  
Surya Adhitya P.Gd
Keyword(s):  
Functional Activity ◽  
Joint Disease ◽  
Control Group ◽  
Ultrasound Therapy ◽  
Functional Activities ◽  
A Value ◽  
Significant Difference ◽  
Before And After ◽  
Group 2 ◽  
Group 1

Background: Osteoarthritis is a complaint characterized by abnormalities in the cartilage of joints and bones nearby, this complaint is commonly felt and has become a chronic joint disease. Cartilage abnormalities will result in bones rubbing against each other, resulting in symptoms of stiffness, pain and restriction of movement in the joints that will affect the quality of functional activities performed. The aim of this study was to determine the effect of ultrasound therapy and neuromuscular taping (nmt) in increasing functional activity in cases of knee osteoarthritis.Research method: The study used experimental with randomized design type pre test and post test control group design. The study was divided into 2 groups, namely group 1 would receive Ultrasound intervention and group 2 would receive Ultrasound and neuromuscular taping intervention. The number of samples in this study was 11 samples per group so that the total number of samples in the two groups was 22 respondents. Measurements of knee functional activity values were measured by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire.Results: Group 1 with a value of p = 0,000 (p <0.05) which showed a significant difference between the value of tenderness before and after the intervention of ultrasound therapy. Group 2 obtained a value of p = 0,000 (p <0.05) indicating there was a significant difference between the value of tenderness before and after the intervention of ultrasound therapy and neuromuscular taping. The results of the calculation of the mean difference were p = 0,0001, the data showed that there was no difference in influence between groups, which means that the provision of ultrasound therapy and neuromuscular taping was no better in increasing functional activities of knee OA patients compared to ultrasound therapy.Conclusion: the provision of ultrasound therapy and neuromuscular taping is not better in increasing

scholarly journals Efficacy of Two Irrigants Used with Self-Adjusting File System on Smear Layer: A Scanning Electron Microscopy Study

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Özgür Genç Şen ◽  
Sadullah Kaya ◽  
Özgür Er ◽  
Tayfun Alaçam
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Citric Acid ◽  
Evaluation System ◽  
Smear Layer ◽  
Root Canals ◽  
Significant Difference ◽  
Group 2 ◽  
Scanning Electron ◽  
Group 1

Mechanical instrumentation of root canals produces a smear layer that adversely affects the root canal seal. The aim of this study was to evaluate efficacy of MTAD and citric acid solutions used with self-adjusting file (SAF) system on smear layer. Twenty-three single-rooted human teeth were used for the study. Canals were instrumented manually up to a number 20 K file size. SAF was used to prepare the root canals. The following groups were studied: Group 1: MTAD + 5.25% NaOCl, Group 2: 20% citric acid + 5.25% NaOCl, and Group 3: Control (5.25% NaOCl). All roots were split longitudinally and subjected to scanning electron microscopy. The presence of smear layer in the coronal, middle, and apical thirds was evaluated using a five-score evaluation system. Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis. In the coronal third, Group 2 exhibited the best results and was statistically different froms the other groups (P<0.05). There was not a significant difference among the three thirds of groups according to in-group comparisons (P>0.05). The solutions used in Group 1 and 2 could effectively remove smear layer in most of the specimens. However, citric acid was more effective than MTAD in the three thirds of the canal.

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