Platelet Function Studies in Normal Volunteers and Patients with Angina Pectoris

1979 ◽  
Author(s):  
J.J.C. Jonker ◽  
den G.J.H. Ottolander
Keyword(s):  
Platelet Aggregation ◽  
Angina Pectoris ◽  
Platelet Function ◽  
Normal Range ◽  
Double Blind ◽  
Group Iii ◽  
Platelet Survival ◽  
Group I ◽  
Group Ii

In 30 normal subjects (group I) and in 89 patients with angina pectoris we studied: the platelet survival time (PST), the platelet aggregation test I (PAT I) acc. to Breddin, the platelet aggregation ratio (PAR) acc. to Wu and Hoak and the Filtragometer log TA acc. to Hornstra. The patients were divided in two groups: 46 patients had already been treated for 6 months with Clofibrate (group II) and 43 patients with placebo (group III) in a double blind trial. The average PST (T½) was within the normal range (group I 99 hrs. group II 105,7 hrs.; group III 102,0 hrs.). About 20% of patients of group II and III had abnormally shortened T½. The PAT I was on average abnormal in group II and III (PAT I in group II 2,3; group III 2,7), but group II normalized after 12 months treatment (PAT I 1,85). The PAR was abnormal in group III, while group II was within the normal range (group I 0,87; group II 0,82; group III 0,69). The log TA results were abnormal in group II and III (group I 2, 45, group II 2,1; group III 2, 1), after 12 months treatment the patient group remained abnormal (group II 2,2; group III 2,1). We failed to find a correlation between the four platelet function tests, nor with these tests and basic laboratory values. The PAT I, the PAR and the Filtragometer seems to be valuable in the detection of abnormal platelet behavior in vitro, but it does not mean than an abnormal platelet survival in vivo occurs in the same individuals.

Effects of Ticlopidine of Platelet Function in Men with Stable Angina Pectoris

1985 ◽  
Vol 54 (04) ◽  
pp. 808-812 ◽  
Author(s):  
Ulf Berglund ◽  
Henning von Schenck ◽  
Lars Wallentin
Keyword(s):  
Platelet Aggregation ◽  
Angina Pectoris ◽  
Platelet Function ◽  
Plasma Levels ◽  
Platelet Reactivity ◽  
Inhibitory Effect ◽  
Controlled Study ◽  
Double Blind ◽  
Platelet Factor

SummaryThe effects of ticlopidine (T) (500 mg daily) on platelet function were investigated in a double-blind placebo-controlled study in 38 middle-aged men with stable incapacitating angina pectoris. The in vitro platelet reactivity to aggregating agents, the platelet sensitivity to prostacyclin and the plasma levels of platelet specific proteins and fibrinogen were determined before and after 4 and 8 weeks of treatment. T exerted a potent inhibitory effect on ADP- and collagen-induced platelet aggregation. The effect of T was proportional to the pretreatment reactivity to ADP and collagen. The inhibitory effect of T on the epinephrine response was less pronounced. The plasma levels of beta-thromboglobulin, platelet factor 4 and fibrinogen were not influenced by T. The platelet inhibition of prostacyclin was potentiated by T, and it was demonstrated that T and prostacyclin had synergistic inhibitory effects on platelet aggregation.

scholarly journals Assessment of shear bond strength of brackets bonded by direct and indirect techniques: an in vitro study

2012 ◽  
Vol 17 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Roberto Hideo Shimizu ◽  
Karlos Giovani Grando ◽  
Isabela Almeida Shimizu ◽  
Augusto Ricardo Andriguetto ◽  
Ana Cláudia Moreira Melo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Group Iii ◽  
Indirect Bonding ◽  
Group I ◽  
Group Ii

OBJECTIVE: This in vitro study was designed to evaluate the shear bond strength (SBS) of orthodontic metal brackets bonded by direct and indirect techniques. METHODS: Thirty healthy human maxillary premolar teeth were used. The teeth were divided into three groups of 10 teeth each: Group I - indirect bonding with SondhiTM Rapid-Set system (3M/Unitek), Group II - indirect bonding with TransbondTM XT adhesive system (3M/Unitek) and Group III - direct bonding with TransbondTM XT adhesive system (3M/Unitek). After bonding and obtaining the specimens for the study, the specimens were subjected to SBS testing in a universal testing machine (Emic, model DL-500). The Kolmogorov-Smirnov test was applied to ascertain that the data had a normal distribution and the Bartlett test to check whether there was homogeneity of variance. One-factor analysis of variance was performed and, subsequently, Tukey's test for paired means. A 5% significance level was adopted. RESULTS: The results of Group I were 67.6 (N) and 5.9 (MPa); Group II, 68.9 (N) and 6.1 (MPa) and Group III (control), 92.5 (N) and 8.1 (MPa). CONCLUSION: It can therefore be concluded that the means for Group III were significantly higher compared with Groups I and II in both Newton (N) and Megapascal (MPa) values. The means attained by the indirect bonding technique used in Groups I and II, however, exhibited no statistically significant differences.

Evaluation and Comparison of Quantity and Pattern of Fluoride release from Orthodontic Adhesives: An in vitro Study

2014 ◽  
Vol 15 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Devatha Ashok Babu ◽  
Sanjay Krishna Sriram ◽  
Ravindra Reddy Regalla ◽  
Chandulal Jadav ◽  
Roopa Rani S Sriram
Keyword(s):  
Orthodontic Treatment ◽  
Control Group ◽  
Base Line ◽  
Fluoride Release ◽  
Group Iii ◽  
Orthodontic Adhesives ◽  
Group I ◽  
Group Ii ◽  
Topical Fluoride

ABSTRACT Background Orthodontic treatment has gained popularity since beginning of era of dentistry. Now a day, everyone is conscious about their appearance, smile and function. During orthodontic treatment use of brackets and adhesives are common. The bonding of brackets will cause demineralization which requires the fluoridation. So the study has been undertaken to analyze the pattern of fluoride release by commercially available adhesive bonding material for the prevention of demineralization. Aim To evaluate and compare the clinical significance of quantity and pattern of fluoride release from three commercially available adhesives. Objectives To assess the pattern of fluoride release and quantity, to reduce the decalcification of enamel around orthodontic brackets and bands during treatment and to prevent further use of topical fluoride both office and self-use agents for prevention of demineralization/for remineralization. Materials and methods The comparison of quantity and pattern of fluoride release study involved commercially available bonding adhesives. They are: Group I—resin reinforced glass Ionomer light cure material (OrthoLC), Group II—fluoride releasing composite resin material (Excel) and Group III— conventional composite (Relay-a-bond) evaluated on 78 freshly extracted premolar teeth divided into three groups consisting 26 specimens in each group. The prepared specimens were stored in artificial saliva at 37°C in an incubator for subsequent fluoride analysis using ORION ion selective electrode coupled with ionalyzer 901. Fluoride analysis made at 24 hours intervals for first 3 consecutive days and thereafter at the end of 10th, 17th, 24th and 31st day of bonding. The data obtained were tabulated and interpreted by statistical analysis using ‘t’ test and one-way analysis of variance (ANOVA). Observations and Results The quantity of fluoride release in groups I and II was significant even at the end of 31st day. The one-way AVOVA showed intra and inter group significance in the quantity of fluoride release. But group III with zero fluoride release with significant decalcification on enamel which requires external use of topical fluorides. The pattern of fluoride released was 3.06 ppm for group I and 2.01 ppm for group II and was declined sharply after 24 hours; and continued to decline in subsequent weeks. Mean quantity of fluoride release by group I was 15.08 ppm were as group II was 9.02 ppm over the test period of 31 days. At the end of 31st day the group I bonding adhesive was releasing considerable amount of fluoride compared to group II whereas group III was nil. At all the periods inter and intra group mean values were highly significant. And group III acted as base line or control group as it was non fluoride releasing material. Conclusion Both the fluoride releasing adhesive bond material are useful to reduce the risk of demineralization and further prevent the usage of topical fluoride application and reduce cost and clinical visiting time for both patient and clinician. How to cite this article Regalla RR, Jadav C, Babu DA, Sriram RRS, Sriram SK, Kattimani VS. Evaluation and Comparison of Quantity and Pattern of Fluoride release from Orthodontic Adhesives: An in vitro Study. J Contemp Dent Pract 2014;15(1):99-102.

Prednisone and azathioprine compared with prednisone and placebo for treatment of chronic graft-v-host disease: prognostic influence of prolonged thrombocytopenia after allogeneic marrow transplantation

Blood ◽  
1988 ◽  
Vol 72 (2) ◽  
pp. 546-554 ◽  
Author(s):  
KM Sullivan ◽  
RP Witherspoon ◽  
R Storb ◽  
P Weiden ◽  
N Flournoy ◽  
...  
Keyword(s):  
Chronic Gvhd ◽  
Aseptic Necrosis ◽  
Actuarial Survival ◽  
Double Blind ◽  
Host Disease ◽  
Group Iii ◽  
Group I ◽  
Group Ii ◽  
Recurrent Malignancy ◽  
Blind Comparison

We conducted a randomized, double-blind comparison of prednisone and placebo (group I) v prednisone and azathioprine (1.5 mg/kg/day) (group II) as early treatment of extensive chronic graft-v-host disease (GVHD). Patients with platelet counts less than 100,000/microL were placed into therapy with prednisone alone (group III). All three groups received identical doses of prednisone (1 mg/kg every other day) and one double-strength trimethoprim-sulfamethoxazole (TMP-SMX) tablet twice daily. Between January 1980 and December 1983, 179 previously untreated patients were enrolled and 164 were evaluable. Patients randomized to group I (n = 63) and group II (n = 63) were well matched for prognostic factors; those placed into group III (n = 38) had more frequent acute GVHD and progressive onset of chronic GVHD. Median duration of therapy was 2 years. Complications included diabetes (5%), aseptic necrosis (5%) and infection. For groups I, II, and III, the respective incidence of infection was disseminated varicella, 11%, 24%, 34%; bacteremia, 6%, 11%, 34%; and interstitial pneumonia, 5%, 14%, 18%. Recurrent malignancy was the most frequent cause of death and did not differ significantly across the groups. Nonrelapse mortality, however, did differ: 21% in group I, 40% in group II, and 58% in group III (I v II, P = .003; I v III, P = .001). Forty patients in group I, 30 in group II, and 10 in group III survive with a minimum follow-up of 3.8 years. Karnofsky performance scores for 68 survivors are 90% to 100%, scores for seven survivors are 70% to 89% and scores for five survivors are less than 70%. Actuarial survival at 5 years after transplant is 61% in group I, 47% in group II, and 26% in group III (I v II, P = .03; I v III, P = .0001). Treatment with prednisone alone results in fewer infections and better survival than prednisone and azathioprine in standard-risk chronic GVHD. Treatment with prednisone alone is less effective in high-risk patients with thrombocytopenia, and other strategies are required.

scholarly journals Avaliação in vitro da infiltração de corante após apicectomia e acabamento com diferentes tipos de brocas

2021 ◽  
Vol 41 (1) ◽  
pp. 59-62
Author(s):  
Edela Puricelli ◽  
Deise Ponzoni ◽  
Carlos Eduardo Baraldi ◽  
Jorge Vianna Dias da Silva ◽  
Carlos Fernando Rozas Cardoso
Keyword(s):  
Methylene Blue ◽  
Statistical Difference ◽  
Apical Surface ◽  
Group Iii ◽  
Group I ◽  
Group Ii ◽  
Root Surfaces

Aims: evaluate the differences of infiltration by apical surface after apicoectomy and different kinds of root finishing. Materials and method: Sixty human cuspids were endodontically treated and received apicoectomy, and were divided in three alleatory groups. Group I received no finishing after the apicoectomy. Group II received standard multifluted bur finishing. Group III received the same finishing of group II, plus brunishing bur. Root surfaces and canal were coated with nail polishing except apical surface. The roots were immersed in 2% methylene blue for 72 hours. Infiltration in internal root surfaces was measured using millimetred magnifying glass by one "blind" examinator. Data were submitted to ANOVA. Results: Group I presented higher infiltration values than groups II and III. These two groups had no statistical difference, although group III showed lower values. Conclusions: finishing of apical surfaces after root resection using multifluted burs have reduced infiltration by dentine. Additional finishing using brunishing burs could even reduce the infiltration, with no statistically significant differences.

scholarly journals Effects of Pomegranate Peel (Punica granatum L.) Extract as an Anthelmintic

2017 ◽  
Vol 1 (5) ◽  
Author(s):  
Monica Amelia ◽  
Diana K Jasaputra ◽  
Rita Tjokropranoto
Keyword(s):  
Rural Areas ◽  
Ascaris Suum ◽  
Pomegranate Peel ◽  
Group Iii ◽  
Group I ◽  
Group Ii ◽  
Pomegranate Peel Extract ◽  
Peel Extract ◽  
Anthelmintic Effect

Helminths infections caused by Soil-Transmitted Helminths (STH) are found in manypeople living in developing countries, especially in rural areas. People often use pomegranate asan anthelmintic. The aim of this research is to find out the effects of pomegranate peel (Punicagranatum L.) as an anthelmintic to female Ascaris suum in vitro. The research on the effects ofpomegranate peel extract has been conducted on 900 female Ascaris suum in vitro. Ascaris suumare divided into 5 groups, group I: pomegranate peel extract of dose 25%, group II: pomegranatepeel extract of 50%, group III: pomegranate peel extract of 75%, group IV: 0.9% NaCl as anegative control, and group V is given mebendazole 0.5% as a positive control. The meanpercentage of dead worms in group I is 39%, in group II 61%, while in group III 82%, but itspotential is lower than mebendazole, which kills 100%. The treatment using pomegranate peelextract of 25%, 50% and 75% respectively has significant differences with p < 0.05 againstnegative control (NC) using a 0.9% NaCl. The research concludes that the pomegranate peelextract has an anthelmintic effect against Ascaris suum females in vitro.Keywords: pomegranate peel extract, anthelmintic effect, in vitro

scholarly journals An in vitro comparative Evaluation of Fracture Strength of Roots Instrumentated with Self-adjusting File and Reciproc Reciprocating File, with and without Obturation

2017 ◽  
Vol 1 (1) ◽  
pp. 20-25
Author(s):  
Pooja Kabra
Keyword(s):  
Fracture Strength ◽  
Comparative Evaluation ◽  
Group Iv ◽  
Control Group ◽  
Group V ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Group Ii

ABSTRACT Aim The purpose of this study was to evaluate the fracture strength of roots instrumented with the self-adjusting file (SAF; ReDent-Nova, Ra'anana, Israel) and the Reciproc reciprocating file and that were and were not obturated using the warm vertical lateral compaction technique. Materials and methods In total, 75 mandibular premolar teeth were sectioned at or below the cementoenamel junction to obtain roots 13 mm in length. The roots were balanced with respect to buccolingual and mesiodistal diameters and weight. They were distributed into four experimental groups and one control group (n = 15): No instrumentation (group I), instrumentation with SAF files but no obturation (group II), instrumentation with SAF files and obturated with warm vertical lateral compaction (group III), instrumentation with Reciproc File but no obturation (group IV), and instrumentation with Reciproc File and obturated with warm vertical lateral compaction (group V). AH Plus sealer (Dentsply DeTrey, Konstanz, Germany) was used along with gutta-percha points. One week later, a vertical load was applied to the specimen's canal until fracture occurred. Data were statistically analyzed using one-way analysis of variance (p = 0.05). Results The mean fracture load was 312.83 N for group I, 297.35 N for group II, 359.15 N for group III, 231.51 N for group IV, and 275.81 N for group V. Conclusion The fracture resistances exhibited a statistically significant difference between all the groups. Teeth instrumented by SAF exhibited a better fracture resistance. How to cite this article Tyagi S, Choudhary E, Kabra P, Chauhan R. An in vitro comparative Evaluation of Fracture Strength of Roots Instrumentated with Self-adjusting File and Reciproc Reciprocating File, with and without Obturation. Int J Clin Dent Res 2017;1(1):20-25.

scholarly journals Comparing the effects of dezocine with lidocaine on prevention of propofol injection pain in adults: a prospective randomized double-blind trial

2019 ◽  
Author(s):  
Xuqin Zhu ◽  
Songlin Jia ◽  
Yajun Xu ◽  
Zhirong Sun
Keyword(s):  
Lower Incidence ◽  
Elective Surgery ◽  
Group Iv ◽  
Patient Comfort ◽  
Injection Pain ◽  
Double Blind ◽  
Group V ◽  
Group Iii ◽  
Group I ◽  
Group Ii

Abstract Background Propofol injection pain (PIP) is common and may decrease patient comfort. The aim of this study was to compare the effects of dezocine with lidocaine on prevention of PIP. Methods 235 patients, who scheduled for elective surgery, aged 18-80 years and ASA (American Society of Anesthesiologists) I or II, were randomly assigned into five groups (n = 47 each). All patients were induced through the dor­sal hand vein or antecubital vein. The five groups were given the following medication intravenously: saline (Group I), lidocaine 20 mg (Group II), lidocaine 40 mg (Group III), dezocine 2 mg (Group IV) and dezocine 4 mg (Group V). Twenty seconds later all patients received a propofol infusion and were asked to grade pain or discomfort in the hand or forearm according to a four-point scale until anesthesia. Results Three groups showed a significantly lower incidence of total PIP than Group I: Group III (OR (Odds ratio): 0.39 (0.16, 0.93)); Group IV (OR: 0.21 (0.09, 0.51)) and Group V (OR: 0.12 (0.05, 0.30)). Group IV showed a significantly lower incidence of total PIP than Group II (OR: 0.32 (0.13, 0.77)). Group V showed a significantly lower incidence of total PIP than Group II (OR: 0.15 (0.06, 0.39)) or Group III (OR: 0.30 (0.13, 0.72)). Conclusion Dezocine is a novel agent to alleviate PIP and appears to be more effective than lidocaine.

scholarly journals Comparing the effects of dezocine with lidocaine on prevention of propofol injection pain in adults: a prospective randomized double-blind trial

2019 ◽  
Author(s):  
Xuqin Zhu ◽  
Songlin Jia ◽  
Yajun Xu ◽  
Zhirong Sun
Keyword(s):  
Lower Incidence ◽  
Elective Surgery ◽  
Group Iv ◽  
Patient Comfort ◽  
Injection Pain ◽  
Double Blind ◽  
Group V ◽  
Group Iii ◽  
Group I ◽  
Group Ii

Abstract Background Propofol injection pain (PIP) is common and may decrease patient comfort. The aim of this study was to compare the effects of dezocine with lidocaine on prevention of PIP.Methods 235 patients, who scheduled for elective surgery, aged 18–80 years and American Society of Anesthesiologists (ASA) I or II, were randomly assigned into five groups (n = 47 each). All patients were induced through the dor­sal hand vein or antecubital vein. The five groups were given the following medication intravenously: saline (Group I), lidocaine 20 mg (Group II), lidocaine 40 mg (Group III), dezocine 2 mg (Group IV) and dezocine 4 mg (Group V). Twenty seconds later all patients received a propofol infusion and were asked to grade pain or discomfort in the hand or forearm according to a four-point scale until anesthesia.Results Three groups showed a significantly lower incidence of total PIP than Group I: Group III (OR [Odds ratio]: 0.39 (0.16, 0.93)); Group IV (OR: 0.21 (0.09, 0.51)) and Group V (OR: 0.12 (0.05, 0.30)). Group IV showed a significantly lower incidence of total PIP than Group II (OR: 0.32 (0.13, 0.77)). Group V showed a significantly lower incidence of total PIP than Group II (OR: 0.15 (0.06, 0.39)) or Group III (OR: 0.30 (0.13, 0.72)).Conclusion Dezocine is a novel agent to alleviate PIP and appears to some extent to be more effective than lidocaine.

scholarly journals An In Vitro Comparison of the Apical Seal Produced by Three Different Thermoplasticized Guttapercha Obturation Techniques in Oval Canals

2015 ◽  
Vol 03 (01) ◽  
pp. 039-046
Author(s):  
Geetanjali Bansal ◽  
Ajay Bansal ◽  
Bhupinder Padda
Keyword(s):  
Control Group ◽  
Group Iii ◽  
Dye Penetration ◽  
Sealing Ability ◽  
India Ink ◽  
Nail Polish ◽  
Group I ◽  
Group Ii ◽  
The Difference

AbstractThe aim of this study was to evaluate and compare the sealing ability to obturate oval canals with three thermoplasticizedguttaperchaobturation techniques taking lateral condensation technique as the control. Ninety-five freshly extracted teeth were decoronated at 2mm coronal to CEJ. Biomechanical preparation was done using step back technique. The teeth were divided into three experimental groups of 30 teeth each and one control group of 5 teeth. The group I (control group) was obturated with lateral condensation technique, group II obturated with injectable thermoplasticizedguttapercha technique, group III obturated with thermoplasticizedguttapercha with downpack and backfill technique andgroup IV obturated with core carrier thermoplasticizedguttapercha technique. The sealability of each technique was assessed by a dye penetration method. The roots were given two full layers of nail polish varnish except apical 2mm. Specimens were then immersed in India ink for 48 hours. Robertson’s technique was used to clear the specimens. The linear dye penetration was measured from anatomic apex to the deepest extent of dye penetration in a coronal direction using triocular stereomicroscope at 10 × magnification. The mean dye leakage of group I was 2.6700mm;group II 0.1713mm;group III 3.3977mm; group IV 2.3210mm. When the means of all the four groups were compared using Kruskal Wallis test the difference was found to be very highly significant with the value<.001**, meaning there by that group II is significantly better than the other three groups as far as sealing ability is concerned.

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