scholarly journals Fabrication and Use of a Customized Provisional Composite Abutment in Dental Practice

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Roman Studenikin ◽  
Sabukhi Niftaliev
Keyword(s):  
Particle Size ◽  
Soft Tissues ◽  
Luminous Flux ◽  
Control Group ◽  
Tissue Ischemia ◽  
Average Value ◽  
Low Viscosity ◽  
Orthopedic Rehabilitation ◽  
Bone Integration ◽  
Time Required

Introduction. Reducing the time of implant integration and the period of prosthetics is an important task of dentistry since this leads to improved quality of life and successful rehabilitation of the patient. Therefore, currently, there is an intensely increased interest in immediate or early loading of the implant, when certain parameters of primary implant stability in the bone tissue are achieved. Materials and Methods. The materials used to perform the procedure for placement of a customized provisional composite abutment were a provisional prefabricated abutment with a retention grip for the composite; aluminum oxide powder with a particle size of 27 μm for better adhesion of the composite, with which the retention grip of the provisional abutment is coated; 3M Single Bond Universal light-curing adhesive applied to the provisional abutment; and Filtek Bulk Fill 3M composite including a low-viscosity radiopaque nanocomponent and ytterbium trifluoride filler with a particle size of 0.01–3.5 nm. Methods used in this study were as follows: fabrication technique using the Cervico system for a customized provisional composite abutment; sandblasting of the provisional abutment using the apparatus RONDOFLEX (KERR); light polymerization of low-viscosity composite using Demi Ultra Kerr lamp (luminous flux power not less than 1100 mW/cm2); and radiographic control of the abutment fit in the implant. Results. The surgical and orthopedic treatment of 20 patients was performed using this technique. The control group consisted of 11 patients with similar pathology, in whose surgery the fabrication of a provisional prosthesis was used. As a result, it was possible to form a gingival profile, in comparison with the control group, to accelerate mucogingival and bone integration, as well as to quickly carry out orthopedic rehabilitation of the patient. The average value of the time required for the final formation of soft tissues for prosthetics in patients in the experimental group was significantly lower than those in the comparison group ( p = 0.007 and p = 0.028 , respectively). In most clinical cases, there is no need for surgery on soft tissues, which eliminates the possibility of additional traumas. Conclusions. The use of a promising technology for the fabrication of a crown on the implant and a customized provisional composite abutment significantly reduced the period of orthopedic rehabilitation of the patient. Immediate implantation with a customized provisional composite abutment completely forms the gingival profile, reduces the risk of microbial contamination in the area of bone formation, minimizes soft tissue ischemia, and accelerates the processes of mucogingival and bone integration around the implant.

scholarly journals Evaluation of anesthetic effect of ropivacaine in surgery of chronic periapical lessions

2010 ◽  
Vol 63 (5-6) ◽  
pp. 366-370 ◽  
Author(s):  
Milos Tijanic ◽  
Nikola Buric ◽  
Goran Jovanovic
Keyword(s):  
Local Anesthetic ◽  
Soft Tissues ◽  
Rating Scale ◽  
Control Group ◽  
Surgical Removal ◽  
Average Value ◽  
Anesthetic Effect ◽  
Intraoral Approach ◽  
Visual Analogous Scale

Introduction. Ropivacaine is used in orthopedcs, gyneacology, surgery, ophtamology, whereas experience about its usage in dentistry is still limited. The aim of this research was to compare the anesthetic effect between local anesthetics ropivacaine and bupivacaine, in surgical disposals of chronical periapical lessions in maxilla. Material and methods. The study included the patients that had indications for surgical removal of chronical periapical lessions at one of the frontal teeth of upper jaw. The total total number of examinees was 60, and they were devided in two groups. Ropivacaine chloride (0.75%) was used as a local anesthetic in one group (Naropin? 0,75%; Astra Zeneca), and in the other one bupivacaine chloride (0.5%) (Vexelit? 0,5%; Zdravlje). The autors applied 1,8 ml of block anesthesia for the n. infraorbitalis (intraoral approach) as well as 0,2 ml of the local anesthetic from the palatine side for the final branches of n. nasopalatinus in order to observe the folloving anesthetic parameters. I. Beginning of anesthesia was followed by the appearence of upper lip numbness. II. Pain rating scale according to Sisk was used for the objective measurement of the anesthesia quality. III. The pain intensity during the intervention was measured by visual analogous scale, on which the patient denoted the intensity of pain he had felt during the intervention. IV. Duration of anesthetic effect - it is followed by soft tissues numbness. Results and discussion. After the ropivacaine application anesthesia effect started in 1.57 min. and after the usage of bupivacaine in 1.67 min. The mean duration of soft tissue numbness after the application of ropivacaine was 321 minutes. Bupivacaine had a shorter anesthetic effect - 296.5 minutes. The quality of anesthesia after the usage of ropivacaine was assessed by the surgeons with average mark - 1.76. Interventions in which this anesthetic was used were performed with minimal pain and without additional anesthesia. The quality of anesthesia after the usage of bupivacaine (3.03) was statistically much worse (p<0.01) in comparison to ropivacaine. In visual analogous scale where patients denoted the intensity of pain during the intervention with ropivacaine the marked average value was 30.1 mm while the average value with usage of bupivacaine was 41.7 mm. The patients from the control group, where bupivacaine was used, had much stronger pain, statistically significant (p<0.05) in comparison to the group where ropivacaine was used. Our results show that the quality of anesthesia that was attained with 0,5% bupivacaine was much worse than the quality of anesthesia after the application of 0,75% ropivacaine. Conclusion. Ropivacaine has a potential to replace bupivacaine completely in cases when there is the indication for its usage in oral surgery (longlasting intervention, interventions followed by intensive postoperational pain, nerve blockade).

WoundClot® Hemostatic Gauze Reduces Bleeding Time after Arterial Venous Fistula Decannulation

2021 ◽  
pp. 1-7
Author(s):  
Orit Kliuk-Ben Bassat ◽  
Doron Schwartz ◽  
Alexander Zubkov ◽  
Amir Gal-Oz ◽  
Alexander Gorevoy ◽  
...  
Keyword(s):  
Bleeding Time ◽  
Control Group ◽  
Dialysis Adequacy ◽  
Cotton Gauze ◽  
Single Center Study ◽  
Time Required ◽  
Venous Fistula ◽  
Thrombosis Rate

<b><i>Introduction:</i></b> Decannulation of the arteriovenous fistula (AVF) after each hemodialysis session requires a precise compression on the needle puncture site. The objective of our study was to evaluate the bleeding time (BT) needed to achieve hemostasis using WoundClot, an innovative hemostatic gauze, and to assess whether its long-term use can improve AVF preservation. <b><i>Methods:</i></b> This is a prospective single center study. Initially, the time to hemostasis after AVF decannulation was compared between WoundClot and cotton gauze in 24 prevalent hemodialysis patients. Thereafter, the patients continued to use WoundClot for 12 months and were compared to a control group consisting of 25 patients using regular cotton gauze. Follow-up data included parameters of dialysis adequacy, AVF interventions, and thrombotic events. <b><i>Results:</i></b> WoundClot use shortened significantly the time needed for hemostasis. Mean venous BT decreased by 3.99 (±4.6) min and mean arterial BT by 6.38 (±4.8) min when using WoundClot compared to cotton gauze (<i>p</i> &#x3c; 0.001). At the end of the study, dialysis adequacy expressed by spKt/V was higher in the WoundClot group compared to control (1.73 vs. 1.53, respectively, <i>p</i> = 0.047). Although patients in WoundClot group had a higher baseline BT, arterial and venous pressures did not differ between the groups after a median follow up of 10.8 months. AVF thrombosis rate was similar between the groups. <b><i>Conclusions:</i></b> WoundClot hemostatic gauze significantly reduced the time required for hemostasis after AVF decannulation and may be associated with better AVF preservation. We suggest using WoundClot for arterial BT longer than 15 min and for venous BT longer than 12.5 min.

scholarly journals A bone replacement-type calcium phosphate cement that becomes more porous in vivo by incorporating a degradable polymer

2021 ◽  
Vol 32 (7) ◽  
Author(s):  
Akiyoshi Shimatani ◽  
Hiromitsu Toyoda ◽  
Kumi Orita ◽  
Yuta Ibara ◽  
Yoshiyuki Yokogawa ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Calcium Phosphate Cement ◽  
Alginic Acid ◽  
Setting Time ◽  
Zealand White Rabbit ◽  
Control Group ◽  
Degradable Polymer ◽  
Low Viscosity ◽  
Bone Replacement

AbstractThis study investigated whether mixing low viscosity alginic acid with calcium phosphate cement (CPC) causes interconnected porosity in the CPC and enhances bone replacement by improving the biological interactions. Furthermore, we hypothesized that low viscosity alginic acid would shorten the setting time of CPC and improve its strength. CPC samples were prepared with 0, 5, 10, and 20% low viscosity alginic acid. After immersion in acetate buffer, possible porosification in CPC was monitored in vitro using scanning electron microscopy (SEM), and the setting times and compressive strengths were measured. In vivo study was conducted by placing CPC in a hole created on the femur of New Zealand white rabbit. Microcomputed tomography and histological examination were performed 6 weeks after implantation. SEM images confirmed that alginic acid enhanced the porosity of CPC compared to the control, and the setting time and compressive strength also improved. When incorporating a maximum amount of alginic acid, the new bone mass was significantly higher than the control group (P = 0.0153). These biological responses are promising for the translation of these biomaterials and their commercialization for clinic applications.

Does Self-reporting Facilitate History Taking in Food Poisoning Mass-casualty Incidents?

2014 ◽  
Vol 29 (4) ◽  
pp. 417-420 ◽  
Author(s):  
Ya-I Hsu ◽  
Ying C. Huang
Keyword(s):  
Health Care ◽  
Medical History ◽  
Food Poisoning ◽  
Mass Casualty ◽  
Mass Casualty Incidents ◽  
Control Group ◽  
History Taking ◽  
Care Providers ◽  
Time Required ◽  
Experimental Group

AbstractIntroductionMedical history is an important contributor to diagnosis and patient management. In mass-casualty incidents (MCIs), health care providers are often overwhelmed by large numbers of casualties. An efficient, reliable, and affordable method of information collection is essential for effective health care response.Hypothesis/ProblemIn some MCIs, self-reporting of symptoms can decrease the time required for history taking, without sacrificing the completeness of triage information.MethodsTwo resident doctors and a number of seventh graders who had previous experience of abdominal discomfort were invited to join this study. A questionnaire was developed to collect information on common symptoms in food poisoning. Each question was scored, and enrolled students were randomly divided into two groups. The experimental group students answered the questionnaire first and then were interviewed to complete the medical history. The control group students were interviewed in the traditional way to collect medical history. Time of all interviews was measured and recorded. The time needed to complete the history taking and completeness of obtained information were compared with students’ t tests, or Mann-Whitney U tests, based on the normality of data. Comprehensibility of each question, scored by enrolled students, was reported by descriptive statistics.ResultsThere were 41 students enrolled: 22 in the experimental group and 19 in the control group. Time to complete history taking in the experimental group (163.0 seconds, SD=52.3) was shorter than that in the control group (198.7 seconds, SD=40.9) (P=.010). There was no difference in the completeness of history obtained between the experimental group and the control group (94.8%, SD=5.0 vs 94.2%, SD=6.1; P=.747). Between the two doctors, no significant difference was found in the time required for history taking (185.2 seconds, SD=42.2 vs 173.1 seconds, SD=58.6; P=.449), or the completeness of information (94.1%, SD=5.9 vs 95.0%, SD=5.0; P=.601). Most of the questions were scored “good” in comprehensibility.ConclusionSelf-reporting of symptoms can shorten the time of history taking during a food poisoning mass-casualty event without sacrificing the completeness of information.HsuY, HuangYC. Does self-reporting facilitate history taking in food poisoning mass-casualty incidents?Prehosp Disaster Med. 2014;29(4):1-4.

scholarly journals Laparoscopic Sleeve Gastrectomy versus Laparoscopic Banded Sleeve Gastrectomy: First Prospective Pilot Randomized Study

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Valeria Tognoni ◽  
Domenico Benavoli ◽  
Emanuela Bianciardi ◽  
Federico Perrone ◽  
Simona Ippoliti ◽  
...  
Keyword(s):  
Sleeve Gastrectomy ◽  
Laparoscopic Sleeve Gastrectomy ◽  
Operative Time ◽  
Intraoperative Complications ◽  
Randomized Study ◽  
Control Group ◽  
Bodyweight Loss ◽  
Relevant Difference ◽  
Banded Sleeve Gastrectomy ◽  
Time Required

Introduction. The placement of ring or band around the gastric tube might prevent the dilation after Laparoscopic Sleeve Gastrectomy (LSG). We describe the first randomized study comparing LSG and Laparoscopic Banded Sleeve Gastrectomy (LBSG).Material and Method. Fifty obese patients were enrolled in the study between January 2014 and January 2015. We analysed differences in operative time, complication rate, mortality, and BMI between the two groups over a period of 12 months.Results. Twenty-five patients received LSG (group A) and 25 LBSG (group B). The mean preoperative BMI was47.3±6.58 kg/m2and44.95±5.85 kg/m2, respectively, in the two groups. There was no statistical relevant difference in operative time. No intraoperative complications occurred. Mean BMI registered after 3, 6, and 12 months in groups A and B, respectively, were37.86±5.72 kg/m2and37.58±6.21 kg/m2(p=0.869),33.64±6.08 kg/m2and32.03±5.24 kg/m2(p=0.325), and29.72±4.40 kg/m2and27.42±4.47 kg/m2(p=0.186); no statistical relevant difference was registered between the two groups.Conclusion. LBSG is a safe and feasible procedure. The time required for the device positioning did not influence significantly the surgical time. The results of bodyweight loss did not document any statistically significant differences among the two groups, even though LBSG group showed a mean BMI slightly lower than that of the control group.

scholarly journals Time required to move cash through slot machines

2018 ◽  
Vol 21 (3) ◽  
pp. 376-384 ◽  
Author(s):  
Karen Kelly ◽  
Carl James Schwarz ◽  
Ricardo Gomez ◽  
Kim Marsh
Keyword(s):  
British Columbia ◽  
Slot Machines ◽  
Content Type ◽  
The Public ◽  
Average Value ◽  
The Mean ◽  
Time Required ◽  
Rest Breaks ◽  
Mean Time ◽  
Practical Implications

Purpose The purpose of this paper is to present an empirical study on the time needed to load and disburse cash using bill validators on slot machines and stand-alone cash dispensers in casinos in British Columbia under a Ticket In Ticket Out (TITO) system. Design/methodology/approach Testing took place over two days, using 18 machines. The results were extrapolated to estimate the approximate time required to process $1,000,000 with different average bill amounts in the cash mix and three different bill validator machines in common use. The average value per bill using the cash mix used by the public in the casino was $33.11 [standard error (SE) $2.11]. Findings The mean time/accepted note ranged from 4.12 to 9.65 s, depending on bill validator type. This implies that the time needed to load $1,000,000 onto credit slips using bill validators on slot machines ranges from 35 to 81 h, excluding rest breaks and other breaks. The time needed to redeem $1,000,000 is estimated to be 3 h. Practical/implications The implications of these finding for illicit actors to successfully launder large amounts of cash are discussed. Given the time needed to physically handle the cash, and other control systems currently in use in casinos in British Columbia, processing large amounts of cash using bill validators on slot machines would require a highly organized team that would find it difficult to elude detection. Originality/value The trial results provide a baseline estimate to be used going forward when investigating or proposing money laundering methodologies that include slot machines.

scholarly journals The use of Portland cement in the repair of mandibular fractures in rats

2011 ◽  
Vol 26 (6) ◽  
pp. 426-432
Author(s):  
Reginaldo Inojosa Carneiro Campello ◽  
Belmiro Cavalcanti do Egito Vasconcelos ◽  
Gerhilde Callou Sampaio ◽  
Antonio Rolim ◽  
Gabriela Granja Porto
Keyword(s):  
Portland Cement ◽  
Bone Healing ◽  
Soft Tissues ◽  
Lethal Dose ◽  
Mandibular Fracture ◽  
Point Of View ◽  
Control Group ◽  
Mandibular Fractures ◽  
Male Wistar Rats ◽  
Experimental Group

PURPOSE: To evaluate the bone healing of mandibular fractures following the use of Portland cement. METHODS: Thirty-two male Wistar rats were divided into control and experimental groups. In the control group the rats were submitted to a mandibular fracture, which was reduced, and the soft tissues were sutured. In the experimental group the rats had the mandibular fracture reduced and maintained with the Portland cement. The animals were euthanized 7 and 21 days after surgery by injecting a lethal dose of anesthetic. The following variables were studied: weight of the animals, radiographic images, histopathological features and time of surgery. RESULTS: A weight loss was observed in the specimens of both groups at the different times of evaluation, a greater difference in weight before and after surgery being found in the experimental group, which was statistically significant (p <0.05, p = 0.041). From the histological point of view, with a margin of error (5.0%) the only two significant differences (p <0.05) recorded in the variables were "Material deployed" and "Bone resorption" during the evaluations at 7 and 21 days, respectively. CONCLUSION: The Portland cement served to promote bone healing.

scholarly journals The Chamomile Aromatherapy Reduce The Scale of Nausea

2019 ◽  
Author(s):  
ima putri
Keyword(s):  
Cervical Cancer ◽  
Intervention Group ◽  
Complementary Therapy ◽  
Control Group ◽  
Average Value ◽  
Paired Samples ◽  
Delayed Nausea ◽  
The World ◽  
Chemotherapy Patients ◽  
Analyze Data

The incidence of cervical cancer in the world is 17 per 100,000 women, while the mortality rate ranges from 8.2 per 100,000 women. One therapy for cancer treatment is chemotherapy. The side effects caused by chemotherapy are nausea and vomiting. In addition to drugs, complementary therapy given to chemotherapy patients is chamomile aromatherapy. This study aims to determine the effect of chamomile aromatherapy on reducing the scale of nausea after chemotherapy of cervical cancer patients in Dr. Moewardi Hospital. The type of research used is quasy experiment, using a research design non equivalent with the control group pretest and posttest design. The sample used was 30 patients with the criteria of patients who experienced Acute &amp; Delayed Nausea. Analyze data used Paired Samples Test and Independent T-Test. The results showed that the average scale of nausea before chamomile aromatherapy intervention was 15.40. And the average scale of nausea after intervention was 2.87 as evidenced by the value p=0.000 (p&lt;0.05). The average value of the nausea after treatment scale in the control group was 7.33, and the nausea scale average value in the intervention group was 2.87. So that it can be concluded that there is an effect after being given chamomile aromatherapy to reduce the scale of nausea after chemotherapy with p=0.000

scholarly journals Pengaruh Metode Pembelajaran Mind Mapping terhadap Hasil Belajar pada Pokok Bahasan Hukum-Hukum Dasar Kimia Siswa Kelas X Semester Ganjil di SMA Negeri 2 Langowan

2019 ◽  
Vol 1 (2) ◽  
pp. 107
Author(s):  
Frindly Makarawung ◽  
I Dewe Ketut Anom ◽  
John Lombok
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Student Learning Outcomes ◽  
Control Group ◽  
Test Results ◽  
Mind Mapping ◽  
Learning Methods ◽  
Control Group Design ◽  
Average Value ◽  
Post Test

This research aims to determine the effect of mind mapping learning methods on the basic laws of chemistry toward learning outcomes of students of class X MIPA in SMA Negeri 2 Langowan. The sample used in this study were all students of class X MIPA of SMA Negeri 2 Langowan. This research uses an experimental method, with the research method used is Quasi Experiment  with Nonequivalent Control Group Design design. The research data were obtained from post-test results. Obtained the average value of student learning outcomes Experiment class is 85. The results showed the value of tcount = 15.7> ttable = 2.21, so H0 was rejected and H1 was accepted. Based on the results of the research it can be concluded that there is an influence on student learning outcomes on the basic laws of chemistry using mind mapping learning methods.

scholarly journals Effect of the suspension of Ag-incorporated TiO2 nanoparticles (Ag-TiO2 NPs) on certain growth, physiology and phytotoxicity parameters in spinach seedlings

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244511
Author(s):  
Fernando Gordillo-Delgado ◽  
Jakeline Zuluaga-Acosta ◽  
Gonzalo Restrepo-Guerrero
Keyword(s):  
Particle Size ◽  
Titanium Dioxide Nanoparticles ◽  
Germination Rate ◽  
Sol Gel ◽  
Control Group ◽  
Human Consumption ◽  
X Ray Diffraction ◽  
X Ray ◽  
Growth Physiology ◽  
Powder Samples

In this work, the effect of the inoculation of silver-incorporated titanium dioxide nanoparticles (Ag-TiO2 NPs) in spinach seeds was evaluated on certain growth, physiology and phytotoxicity parameters of the plants. This is an important crop for human consumption with high nutritional value due to their low calorie and fat content, providing various vitamins and minerals, especially iron. These NPs were obtained by means of the sol-gel method and heat treatment; the resulting powder material was characterized using X-ray diffraction and scanning electron microscopy and the influence of these NPs on plants was measured by estimating the germination rate, monitoring morphological parameters and evaluating phytotoxicity. The photosynthetic activity of the spinach plants was estimated through the quantification of the Ratio of Oxygen Evolution (ROE) by the photoacoustic technique. Samples of TiO2 powder with particle size between 9 and 43 nm were used to quantify the germination rate, which served to determine a narrower size range between 7 and 26 nm in the experiments with Ag-TiO2 NPs; the presence of Ag in TiO2 powder samples was confirmed by energy-dispersive X-ray spectroscopy. The analysis of variance showed that the dependent variable (plant growth) could be affected by the evaluated factors (concentration and size) with significant differences. The statistical trend indicated that the application of the Ag-TiO2 NPs suspension of lowest concentration and smallest particle size could be a promoting agent of the growth and development of these plants. The inoculation with NPs of 8.3 nm size and lowest concentration was related to the highest average ROE value, 24.6 ± 0.2%, while the control group was 20.2 ± 0.2%. The positive effect of the Ag-TiO2 NPs treatment could be associated to the generation of reactive oxygen species, antimicrobial activity, increased biochemical attributes, enzymatic activity or improvements in water absorption.

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