scholarly journals Release of nickel ion and surface microstructure of NiTi archwire after immersion in tomato and orange juice

2021 ◽  
Vol 912 (1) ◽  
pp. 012017
Author(s):  
H F Lubis ◽  
Y A Purba
Keyword(s):  
Orange Juice ◽  
Inductively Coupled Plasma ◽  
Surface Microstructure ◽  
Ion Release ◽  
Nickel Ion ◽  
Inductively Coupled ◽  
Significant Difference ◽  
The Difference ◽  
Group 2 ◽  
Group 1

Abstract One of wires commonly used in orthodontic treatment is nickel-titanium (NiTi) archwire. NiTi archwire has the potential to release ions that can cause allergic and cytotoxic reactions. This study aimed to specify the difference in the amount of nickel ion release and surface microstructure of NiTi archwires after immersing in tomato and orange juice. NiTi archwire with a diameter of 0.016 inches and a length of 5 cm was used as the sample, which was immersed in 15 ml of solution and then stored at 37°C in an incubator for 24 hours. The samples were divided into two tretment groups (immersed in tomato and orange juice), each with nine samples. The immersion solution was tested for ion release using an Inductively Coupled Plasma–Mass Spectrometer. The microstructure of the wire surface was examined using a scanning electron microscope (SEM). The results revealed that group 1 has higher average amount of nickel ion release than group 2 and control. SEM result showed that the surface microstructure of the NiTi archwire in group 1 is roughest. There was a significant difference between the amount of nickel ion released and surface microstructure on NiTi archwire after being immersed in tomato and orange juice.

scholarly journals Nickel ion release from dental alloys in two different mouthwashes

2019 ◽  
Vol 13 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Karim Jafari ◽  
Saeed Rahimzadeh ◽  
Somayeh Hekmatfar
Keyword(s):  
Inductively Coupled Plasma ◽  
Control Group ◽  
Distilled Water ◽  
Dental Alloys ◽  
Ion Release ◽  
Nickel Ion ◽  
Inductively Coupled ◽  
Nickel Chromium ◽  
Significant Difference ◽  
History Of

Background. Mouthwashes are widely used as adjuncts to mechanical oral hygiene procedures. Nonetheless, there is little information regarding the effect of various mouthwashes on the amount of ions released from the nickel-chromium (Ni‒Cr) alloys used in the fabrication of fixed prostheses. Therefore, the present study was conducted to evaluate the effect of two types of mouthwash on the release of Ni ions from dental alloys. Methods. Forty-two disk-shaped specimens were prepared with a diameter of 10 mm and a height of 2 mm. Two mouthwashes were examined in this study: Oral B and Listerine. A control group was also considered using distilled water. Each Ni‒Cr disk was immersed in the mouthwashes and distilled water in polypropylene test tubes, and then incubated at 37°C to simulate the oral temperature. After 45 days of incubation, the samples were tested for Ni ions using inductively coupled plasma mass spectroscopy. Data were analyzed using ANOVA. Results. In the Halita group subjects exhibited 2.04±0.65 reduction in OLS. OLS reduction in the chlorhexidine group was 1.95±0.74. Statistical analysis showed no significant difference between the two groups (P>0.05). Conclusion. As the results indicated, the amount of ion release was within the safe limits in the two experimental groups. However, it is recommended that prescribe Listerine mouthwash should not be prescribed for the patients with a history of Ni allergy.

scholarly journals Release of nickel ions and changes in surface microstructure of stainless steel archwire after immersion in tomato and orange juice

2021 ◽  
Vol 912 (1) ◽  
pp. 012018
Author(s):  
H F Lubis ◽  
G H Simamora
Keyword(s):  
Stainless Steel ◽  
Orange Juice ◽  
Artificial Saliva ◽  
Tomato Juice ◽  
Surface Microstructure ◽  
Orthodontic Appliances ◽  
Ion Release ◽  
Nickel Ion ◽  
Nickel Ions ◽  
Significant Difference

Abstract Stainless steel archwire is an important component of orthodontic appliances that have the potential to corrode. Consumption of foods and beverages with a low pH, such as fruit-based juices, can trigger the release of nickel ions in stainless steel archwire. This study aimed to determine the difference in the amount of nickel ions release and the surface microstructure of stainless steel archwire after immersed in tomato and orange juice. The sample used is stainless steel archwire with a diameter of 0.016 inches and length of 5 cm immersed in 15 ml of solution and then stored at 37°C in an incubator for 24 hours. The samples were divided into three groups (immersed in tomato juice,orange juice and artificial saliva), each group consisted of 9 samples. The solution was tested using an Inductively Coupled Plasma Mass Spectrometer (ICP-MS) to determine the number of nickel ions released. The archwire surface microstructure was tested using a Scanning Electron Microscope (SEM). The results showed that the average amount of nickel ion release in orange juice is more than tomato juice. There was a significant difference between the amount of nickel ion released and surface microstructure on stainless steel archwire after being immersed in tomato and orange juice.

scholarly journals Differences in nickel ions released from nickel-titanium arch wire after immersion in detergent and non-detergent toothpaste

2021 ◽  
Vol 6 (2) ◽  
pp. 77
Author(s):  
Hilda Fitria Lubis ◽  
Kholidina Imanda Harahap ◽  
Nadia Tamari Lubis
Keyword(s):  
Inductively Coupled Plasma ◽  
Nickel Titanium ◽  
The Body ◽  
Ion Release ◽  
Nickel Ion ◽  
Nickel Ions ◽  
Whitney Test ◽  
Inductively Coupled ◽  
A Value ◽  
Significant Difference

Nickel-titanium (NiTi) arch wire has properties that favor its use during the leveling and aligning phase of orthodontic treatment. This NiTi orthodontic arch wire has the potential to experience nickel ion release. One factor that can cause the release of nickel ions is toothpaste. Nickel ions released can enter the body and cause carcinogenic, mutagenic, cytotoxic, and allergic effects. The purpose of this study was to see the differences of nickel ions released from NiTi orthodontic arch wire after immersion in detergent and non-detergent toothpaste. This was a laboratory experimental research to draft a comparative design. The sample size was 40 pieces of NiTi orthodontic arch wire which were divided into 2 groups, immersion in detergent toothpaste and immersion in non-detergent toothpaste. The sample used was NiTi arch wire solution immersed in toothpaste and distilled water for 24 hours in an incubator at 37 °C then measured using inductively coupled plasma (ICP) mass spectrometer to determine the released nickel ions. Data were analyzed usingMann-Whitney test. The Mann-Whitney test resulted in a value of 0.872 (p≥0.05) which indicates no significant difference between the two groups. The study concluded that there is no difference in the nickel ions released from NiTi orthodonticarchwire after immersion in detergent and non-detergent toothpaste.

A volumetric three-dimensional evaluation of invasiveness of an endoscopic and microscopic approach for transmeatal visualisation of the middle ear

2021 ◽  
pp. 1-5
Author(s):  
A H A Baazil ◽  
J G G Dobbe ◽  
E van Spronsen ◽  
F A Ebbens ◽  
F G Dikkers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Middle Ear ◽  
Three Dimensional ◽  
Endoscopic Approach ◽  
Microscopic Approach ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
The Difference ◽  
Group 2 ◽  
Group 1

Abstract Objective This study aimed to compare the necessary scutum defect for transmeatal visualisation of middle-ear landmarks between an endoscopic and microscopic approach. Method Human cadaveric heads were used. In group 1, middle-ear landmarks were visualised by endoscope (group 1 endoscopic approach) and subsequently by microscope (group 1 microscopic approach following endoscopy). In group 2, landmarks were visualised solely microscopically (group 2 microscopic approach). The amount of resected bone was evaluated via computed tomography scans. Results In the group 1 endoscopic approach, a median of 6.84 mm3 bone was resected. No statistically significant difference (Mann–Whitney U test, p = 0.163, U = 49.000) was found between the group 1 microscopic approach following endoscopy (median 17.84 mm3) and the group 2 microscopic approach (median 20.08 mm3), so these were combined. The difference between the group 1 endoscopic approach and the group 1 microscopic approach following endoscopy plus group 2 microscopic approach (median 18.16 mm3) was statistically significant (Mann–Whitney U test, p < 0.001, U = 18.000). Conclusion This study showed that endoscopic transmeatal visualisation of middle-ear landmarks preserves more of the bony scutum than a microscopic transmeatal approach.

scholarly journals The difference in outcome of patients with open inguinal hernia repair by using delayed absorbable sutures instead of non-absorbable sutures for mesh fixation

2020 ◽  
Vol 8 (1) ◽  
pp. 24
Author(s):  
Ali G. Mohammed Redha ◽  
Adil A. Jaber ◽  
Aqeel M. Nasser
Keyword(s):  
Hernia Repair ◽  
Mesh Fixation ◽  
Good Alternative ◽  
P Value ◽  
Absorbable Sutures ◽  
Significant Difference ◽  
The Difference ◽  
Group 2 ◽  
One Year ◽  
Group 1

Background: Different methods are found for mesh fixation in inguinal hernioplasty both open and laparoscopic. In open technique, sutures have been the method of choice for their reduced costs and surgeons’ habits. Whether absorbable instead of non-absorbable sutures can be used still a matter of debate in view of hernia recurrence and post-operative complications.Methods: This is a prospective done on 158 male patients with uncomplicated unilateral inguinal hernias. Two groups of 69 patients were evaluated after periods up to 1 year after open hernioplasty by using delayed absorbable sutures in one group (group 1) and non-absorbable sutures in the other group (group 2) for fixation of mesh.Results: In spite of a noticeable reduction in complication in the group 1 in term of number and percentage when compared with group 2 mainly chronic pain, there is no significant difference (p value>0.05). However, these results are associated with zero recurrence in both groups during a period of one year follow up.Conclusions: Delayed absorbable sutures are good alternative of non-absorbable sutures in open mesh hernia repair associated with less complications and almost no increase in chance of recurrence.  

scholarly journals Comparison of Inflammatory Reactions Following Two Different Cesarean Section Techniques: The Modified Misgav-Ladach Versus the Pfannenstiel-Kerr; A Prospective Randomized Trial

2018 ◽  
pp. 1
Author(s):  
Baris Buke ◽  
Hatice Akkaya ◽  
Cigdem Karakukcu
Keyword(s):  
Cesarean Section ◽  
Inflammatory Reaction ◽  
Operation Time ◽  
Blood Samples ◽  
Inflammatory Reactions ◽  
Tnf Α ◽  
Significant Difference ◽  
The Difference ◽  
Group 2 ◽  
Group 1

<p><strong>Objectives:</strong> There is not yet a consensus on the optimal surgical technique for cesarean section. This is the first study comparing two different (Cesarean Section) with respect to the following inflammatory reaction in means of changes in inflammatory marker levels.<br />To evaluate the differences in inflammatory reactions following two different (Cesarean Section) techniques, the modified Misgav-Ladach versus the Pfannenstiel-Kerr technique.</p><p><strong>Study Desıgn:</strong> The study population included 88 pregnant women who met the inclusion criteria. These women were randomized into two groups according to Consolidated Standards of Reporting Trials guidelines: Group 1 (Misgav-Ladach group) and Group 2 (Pfannenstiel Kerr group). To compare the inflammatory reactions following surgery, Interleukin-6 (IL-6) and Tumor Necrosis Factor-α (TNF-α) levels were measured in venous blood samples drawn from the patients just before (0 hour) and 24 hours (24th hour) after the surgery. In 5 women from Group 1 and 2 women from Group 2, the 24th hour blood samples could not be obtained or were lost. Thus, a total of 81 women, 39 women from Group 1 and 42 women from Group 2, comprised the population of study. The differences in inflammatory reactions between the 0 and 24th hours were analyzed by calculating the percent change in IL-6 and TNF-α levels, and these percentages were then compared between the groups.</p><p><strong>Results:</strong> There was a statistically significant difference between Group 1 and Group 2 regarding the serum IL-6 level change between 0 and 24th hour (530±653% and 196±168%, respectively, p=0.022. The difference in TNF-α was also higher in Group 2, but the difference was not statistically significant (229±306% vs. 571±824%, p=0.12). The mean operation time was significantly shorter in Group 1 (9.44 min. vs. 16.86 min, p=0.0001).</p><p><strong>Conclusions:</strong> The results of this study indicate that the modified Misgav-Ladach technique has a weaker inflammatory reaction, which indicates fewer short- and long-term surgical complications.</p>

scholarly journals Influences of 27-Gauge Vitrectomy on Corneal Topographic Conditions

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Takafumi Hirashima ◽  
Takao Utsumi ◽  
Miou Hirose ◽  
Hideyasu Oh
Keyword(s):  
Diabetic Retinopathy ◽  
Epiretinal Membrane ◽  
Spherical Aberration ◽  
The Other ◽  
Significant Difference ◽  
The Difference ◽  
Group 2 ◽  
Higher Order Aberration ◽  
Topographic Parameters ◽  
Group 1

Purpose. To evaluate the influences of 27-gauge vitrectomy on corneal topographic conditions. Method. Fifty-six eyes of 56 patients undergoing 27-gauge vitrectomy were retrospectively studied. Twenty-three eyes with epiretinal membrane (ERM), 23 eyes with macular hole (MH), and 10 eyes with proliferative diabetic retinopathy (PDR) were included. Forty-five of the 56 eyes underwent 27-gauge phacovitrectomy (group 1), and the remaining 11 eyes underwent 27-gauge vitrectomy alone (group 2). Corneal topography was obtained with a wave-front analyzer preoperatively and at 1 and 3 months postoperatively. The corneal topographic parameters evaluated were the average corneal power, regular astigmatism, spherical aberration, and higher-order aberration (HOA). Results. In between-group analyses of groups 1 and 2, no significant differences were observed regarding the changes of the 4 parameters from the baseline to 1 and 3 months postoperatively. No significant differences in the changes of all parameters from the baseline to 1 and 3 months postoperatively were also observed between MH group and the other two groups. A significant difference in the change of HOA from the baseline to 1 month postoperatively was observed between ERM and PDR group however, the difference disappeared at 3 months. Conclusion. 27-gauge vitrectomy did not induce substantial changes in the corneal topographic conditions.

scholarly journals Efficacy and opioid-sparing effect of interpleural bupivacaine in patients undergoing laparoscopic cholecystectomy: Prospective observational study (Running title: Efficacy of inter-pleural bupivacaine in laparoscopy)

2021 ◽  
Vol 43 (5-6) ◽  
pp. 103-110
Author(s):  
A.K. Prasath ◽  
Senthil Kumar ◽  
Mohanhariraj Angamuthammal ◽  
Agnes Evangleen
Keyword(s):  
Laparoscopic Cholecystectomy ◽  
Pain Relief ◽  
Study Groups ◽  
P Value ◽  
Number Of Patients ◽  
Significant Difference ◽  
Vas Scores ◽  
The Difference ◽  
Group 2 ◽  
Group 1

Introduction: Laparoscopic cholecystectomy is considered minimally invasive, but pain following laparoscopy is moderate to severe, leading to increased morbidity and length of hospital stay. Various medications, including opioids, NSAIDs, and techniques like intraperitoneal local anesthetic infiltration, are used. In this study, we investigated interpleural block with bupivacaine for pain relief following laparoscopic cholecystectomy. Methods: A total of 60 patients were included in the study. 30 patients received 20 ml of 0.5% interpleural bupivacaine (group 1), and 30 patients recieved 20 ml of 0.9% normal saline (group 2). We recorded visual analog score (VAS), vital signs, and postoperative opioid requirements. Tramadol (2 mg/kg) was rescue medication if VAS ≥ 5. Results: Significant difference between study groups was recorded among VAS scores measured at 30 minutes, 1, 2, 6, 10, and 12 hours (p value < 0.05). The difference in VAS scores at 15 minutes and 14 hours between study groups was insignificant (p value > 0.05). The number of patients who received tramadol was 9 (30%) patients in group 1 and 29 (96.7%) patients in group 2. The difference in proportion for tramadol intake at 6 hours was significant among study groups (p-value < 0.05). Conclusion: Interpleural bupivacaine 20 ml of 0.5% used as analgesia reduces post-operative opioid requirement following laparoscopic cholecystectomy. Hence interpleural block can be safely used as a regional technique for pain relief following laparoscopic cholecystectomy.

scholarly journals Effect of Wallpass Exercise With Groups Of 4 Improving Passing Results Bali United Mataram

MAENPO ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 68
Author(s):  
Soemardiawan Soemardiawan ◽  
Nurdin Nurdin
Keyword(s):  
Research Design ◽  
Test Data ◽  
Research Data ◽  
T Test ◽  
Significant Difference ◽  
Post Test ◽  
The Mean ◽  
The Difference ◽  
Group 2 ◽  
Group 1

Football is a sport that is played outside the room of 11 players with the aim of getting the ball into the opponent's goal. The results of observations in the field that there are still many players in passing while competing so that it is not in accordance with the target. The formulation of the problem in this study is whether there is an effect of wallpass training and exercise with groups of 4 to increase the passing results of Bali United Mataram. The purpose of this research is to find out. The research design was a twogroup pretest-postest design. Population and sample are all players totaling 22 people. Instrument Passing for 30 seconds. The research data were analyzed using SPSS version 22. The results of the t-test for group 1 obtained significant values (2-tailed) <0.05: 0.003 <0.05 and group 2 significant values (2-tailed) <0.05: 0.038 <0,05. So these results indicate a significant difference. Based on the test for the difference in the mean post-test data for groups 1 and 2, it was obtained a significant value (2-tailed) <0.05: 0.026 <0.05 with an increase in the percentage value in group 1 of 12.93% and group 2 of 3, 96%. Based on the results of the analysis, it can be concluded that the effect of wallpass training and exercise with groups of 4 is an increase in the passing results of Bali United Mataram in 2021.Keywords: Passing, Wallpass, with groups of 4

Viscocanalostomy with Mitomycin-C: A Preliminary Study

2005 ◽  
Vol 15 (2) ◽  
pp. 202-208 ◽  
Author(s):  
A. Yarangümeli ◽  
ö. Gürbüz Köz ◽  
M.N. Alp ◽  
A.H. Elhan ◽  
G. Kural
Keyword(s):  
Mitomycin C ◽  
Long Term Results ◽  
Success Rates ◽  
Surgical Success ◽  
Significant Difference ◽  
The Difference ◽  
Group 2 ◽  
Conjunctival Bleb ◽  
Group 1

Purpose To compare the results of viscocanalostomy with and without mitomycin-C (MMC). Methods Retrospective results of 15 standard viscocanalostomy (VCO) operations (Group 1) were compared with the prospective results of 15 VCO operations performed with intraoperative adjunctive MMC (Group 2). MMC (0.2 mg/mL) was applied over and under the superficial scleral flap for 3 minutes in Group 2 before the deep flap was prepared. Each patient was followed up for at least 1 year, and results of examinations in the first 12 months were used in the statistical comparison of the two groups. Surgical success was defined as intraocular pressure (IOP) ≤ 18 mmHg. Results Pr eoperative mean intraocular pressures (IOP) in Group 1 and Group 2 wer e 35.3±11.0 and 39.1±8.9, respectively. Mean IOP levels at the 12th month were 14.4±2.6 and 11.9±4.0, respectively, showing a significant decrease in both groups (p<0.001). Postoperative IOP course appeared to be lower in the MMC group, however, the difference was not statistically significant (p=0.554). Complete success rates without medications were 40% in Group 1 and 67% in Group 2. No significant difference was found between the two groups in terms of early and late postoperative complications, pre- and postoperative number of antiglaucoma medications, and surgical success rates at the end of the study period (p>0.05 for all). A significant difference was verified between the two groups of eyes considering the conjunctival bleb types, as low-lying, localized blebs were the most frequent type in Group 1 and thin-walled, avascular blebs were more predominant in the MMC group (p=0.004). Conclusions Intraoperative adjunctive MMC use might improve the long-term results of viscocanalostomy by facilitating subconjunctival filtration and might widen the indication range of the technique.

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