Assessment of Cases of Complete Denture Fracture.

BACKGROUND: There are many causes and reasons associated with fractures of complete dentures. The present study assessed case of complete denture fracture. MATERIALS AND METHODS: One hundred and fifty complete denture wearers reported to the department of prosthodontics for correction of complete denture fracture were examined carefully. The factors such as retention, stability, and occlusal errors were recorded. Cause of denture fracture was recorded too. RESULTS: Out of 150 patients, males were 80 and females were 70. The site of fracture was incisor area in 25, canine area in 30, midline in 50, molar area in 10, and maxillary tuberosity/retromolar pad area in 35 cases. The etiology of denture fracture was accidental fall in 42, poor fit in 28, poor occlusion in 40, material breakage in 25, and acrylic base defect in 15 cases. The difference was statistically significant (P < 0.05). CONCLUSION: Most common cause of denture fracture was accidental fall, poor fit, poor occlusion, and material breakage.

Assessment of Effect of Periodontal and Prosthodontic Therapy on Glycemic Control in Patients with Diabetes.

BACKGROUND: Periodontitis is a chronic inflammatory disease of multifactorial etiology. The present study was conducted to assess the effect of periodontal and prosthodontic therapy on glycemic control in patients with diabetes. MATERIALS AND METHODS: 80 type II diabetics patients of both genders were divided into Group I (periodontal and prosthodontic therapy) and Group II (Healthy). In control group, only oral hygiene instruction and mouth wash were prescribed. RESULTS: Group I had 22 males and 18 females and Group II had 17 males and 23 females. The mean glycated hemoglobin level in Group I was 7.8% before and 6.7% after treatment and in Group II was 6.4% before and 6.2% after treatment. The difference was significant (P < 0.05). CONCLUSION: There was improvement in glycemic status in diabetic patients undergoing periodontal and prosthodontic therapy as compared to those not undergoing treatment.

Impact of immediate feedback on the learning of medical students in pharmacology.

INTRODUCTION: Providing feedback to students is an essential component in medical education and has been shown to improve the students' learning. The purpose of this study is to evaluate the effect of computer-based immediate feedback on the medical students' learning in a pharmacology course. METHODS: In this prospective intervention study some feedback modules in pharmacology (FMP) were prepared in two topics: the cardiovascular system (CVS) and chemotherapy, using blank templates on "Hot Potatoes" software. The FMP included MC-based questions and two versions were developed: one with feedback (FMP-1) and the other without feedback (FMP-2). The FMP-1 module provided immediate feedback for each option the student chose. The students (n=48) were randomized by computer generated random number table to two groups A and B to receive the module in CVS, i.e., FMP-1 and FMP-2, respectively. A cross-over design was adopted to expose all students to immediate feedback modules. The test scores were compared and feedback was obtained from students and faculty using a validated questionnaire. A focus group discussion was conducted to clarify the issues raised by the students. RESULTS: The module with immediate feedback was much better appreciated by the students than the module without feedback. The students spent more time on FMP-1 (42±7.00 minutes vs 27±12.36 minutes; p<0.001 in chemotherapy and 40±12.11 minutes vs 24±6.01 minutes; p<0.001 in CVS). However, there was no statistically significant difference in mean test scores. The qualitative data collected provided important information on the value of immediate feedback. The students believed that immediate feedback was an excellent way for self-assessment and improved their deeper understanding of content areas. They also felt that it supplemented their traditional learning habits and stimulated them to read more. The students enjoyed its non-threatening nature. CONCLUSION: Immediate feedback improved the deeper understanding of pharmacology and its relevance to medicine for the two topics although immediate feedback did not improve test scores. Overall, immediate feedback had a positive impact on the students' self-directed learning.

Role of concept map in teaching general awareness and pharmacotherapy of HIV/AIDS among second professional medical students.

OBJECTIVE: Medical students as future doctors will play an important role in caring for HIV-infected patients. This study assessed and evaluated the existing level of knowledge of MBBS students about HIV/AIDS given through lecture delivery methods and by use of concept map (CM). MATERIALS AND METHODS: This study was carried out on 150 professional MBBS students of tertiary care hospital. A pretest was conducted by giving 10 multiple choice questions (MCQ) of general awareness and 15 questions regarding pharmacotherapy of HIV/AIDS. In between pre- and post-test, a session of 1-week integrated teaching module was organized. After completion of integrated teaching, 2 h session of CM on general awareness and pharmacotherapy of HIV/AIDS was taken. A posttest was conducted using MCQs and problem-based question (PBQ) to assess the effect of integrated teaching and CM on their knowledge about HIV/AIDS. Feedback was also taken from the students to regarding their views about CM. RESULTS: There was a significant increase in student's score in MCQ test after integrated teaching than pretest (P < 0.05). There was also significant improvement in PBQ score after CM than that of after integrated teaching (P < 0.05). Students' perception about the effectiveness of CM was positive. CONCLUSION: CM can make a significant improvement in the knowledge of medical students and were motivated and developed interest in the subject.

Introducing structured viva voce examination in medical undergraduate pharmacology: A pilot study.

OBJECTIVE: Viva voce examination is an important tool of evaluation in medical examinations marred by high subjectivity. Gross subjectivity in viva voce assessment can be reduced by structuring it. MATERIALS AND METHODS: The marks obtained in theory and viva voce (traditional viva voce examination [TVVE]) of I sessional, II MBBS students were compared and a huge disparity was identified. A structured viva voce examination (SVVE) was then proposed and experimented as an objective and standardized alternative. Sets of equitable question cards for SVVE were prepared, each having eight questions with two parts each, arranged successively with increasing difficulty, domains of learning, and appropriate marks. The percentage variation in scoring in viva versus theory marks was calculated for both TVVE and SVVE, and students were grouped as Group I (+100 to +51%); Group II (+50 to -50%); Group III (-51 to -100%); Group IV (-101 to -150%); Group V (-151 to -200%); and Group VI (< -200%) variation, as? inappropriate, appropriate, inappropriate, erroneous, more erroneous and most erroneous respectively. Student's feedback on the SVVE was also obtained. RESULTS: In TVVE (n = 128), the students distributed were:none,17.2%, 23.4%, 22.7%, 11.7% and 25% in Group I, II, III, IV, V, and VI in contrast to SVVE (n = 107) as 7.5%, 57.9%, 19.6%, 6.5%, 5.6%, and 2.8%, respectively. Marked disparity of TVVE was annulled with SVVE. Student's feedback was quite encouraging with 83% overall acceptability and almost 66% preferred SVVE. CONCLUSION: SVVE was more realistic as compared to TVVE. Most of the students favored this approach.

Pharmacology and Phytochemistry of Oleo-Gum Resin of Commiphora wightii (Guggulu).

Guggulu is an oleo-gum resin which exudes out as a result of injury from the bark of Commiphora wightii (Arnott) Bhandari [syn. Commiphora mukul (Hook. Ex Stocks) Engl; Balsamodendron mukul (Hook. Ex Stocks); Family, Burseraceae]. It has been used in the Ayurveda since time immemorial for the treatment of variety of disorders such as inflammation, gout, rheumatism, obesity, and disorders of lipids metabolism. It is a mixture of phytoconstituents like volatile oil which contains terpenoidal constituents such as monoterpenoids, sesquiterpenoids, diterpenoids, and triterpenoids; steroids; flavonoids; guggultetrols; lignans; sugars; and amino acids. This review is an effort to compile all the information available on all of its chemical constituents which are responsible for its therapeutic potential. The wild occurrence of this species is restricted mainly to the dry regions of Rajasthan and Gujarat States of India, and the bordering regions of Pakistan. Oleo-gum resin, guggulu, tapped from the stems of this species, is consumed in high volumes by the Indian herbal industries. There has been a decline in its wild population over the last several decades, as a result of habitat loss and degradation, coupled with unregulated harvesting and tapping of oleo-gum resin. This species is consequently assessed as Critically Endangered and enlisted in the IUCN red list of threatened species.

Mannich bases: an important pharmacophore in present scenario.

Mannich bases are the end products of Mannich reaction and are known as beta-amino ketone carrying compounds. Mannich reaction is a carbon-carbon bond forming nucleophilic addition reaction and is a key step in synthesis of a wide variety of natural products, pharmaceuticals, and so forth. Mannich reaction is important for the construction of nitrogen containing compounds. There is a number of aminoalkyl chain bearing Mannich bases like fluoxetine, atropine, ethacrynic acid, trihexyphenidyl, and so forth with high curative value. The literature studies enlighten the fact that Mannich bases are very reactive and recognized to possess potent diverse activities like anti-inflammatory, anticancer, antifilarial, antibacterial, antifungal, anticonvulsant, anthelmintic, antitubercular, analgesic, anti-HIV, antimalarial, antipsychotic, antiviral activities and so forth. The biological activity of Mannich bases is mainly attributed to α, ß-unsaturated ketone which can be generated by deamination of hydrogen atom of the amine group.

Therapeutic potential of hydrazones as anti-inflammatory agents.

Hydrazones are a special class of organic compounds in the Schiff base family. Hydrazones constitute a versatile compound of organic class having basic structure (R1R2C=NNR3R4). The active centers of hydrazone, that is, carbon and nitrogen, are mainly responsible for the physical and chemical properties of the hydrazones and, due to the reactivity toward electrophiles and nucleophiles, hydrazones are used for the synthesis of organic compound such as heterocyclic compounds with a variety of biological activities. Hydrazones and their derivatives are known to exhibit a wide range of interesting biological activities like antioxidant, anti-inflammatory, anticonvulsant, analgesic, antimicrobial, anticancer, antiprotozoal, antioxidant, antiparasitic, antiplatelet, cardioprotective, anthelmintic, antidiabetic, antitubercular, trypanocidal, anti-HIV, and so forth. The present review summarizes the efficiency of hydrazones as potent anti-inflammatory agents.

1,3,4-oxadiazole derivatives: synthesis, characterization, antimicrobial potential, and computational studies.

We report the synthesis and biological assessment of 1,3,4-oxadiazole substituted 24 derivatives as novel, potential antibacterial agents. The structures of the newly synthesized derivatives were established by the combined practice of UV, IR, (1)H NMR, (13)C NMR, and mass spectrometry. Further these synthesized derivatives were subjected to antibacterial activity against all the selected microbial strains in comparison with amoxicillin and cefixime. The antibacterial activity of synthesized derivatives was correlated with their physicochemical and structural properties by QSAR analysis using computer assisted multiple regression analysis and four sound predictive models were generated with good R(2), R(adj)(2), and Fischer statistic. The derivatives with potent antibacterial activity were subjected to molecular docking studies to investigate the interactions between the active derivatives and amino acid residues existing in the active site of peptide deformylase to assess their antibacterial potential as peptide deformylase inhibitor.

Formulation and characterization of drug loaded nonionic surfactant vesicles (niosomes) for oral bioavailability enhancement.

Nonionic surfactant vesicles (niosomes) were formulated with an aim of enhancing the oral bioavailability of tenofovir disoproxil fumarate (TDF), an anti-HIV drug. Niosomes were formulated by conventional thin film hydration technique with different molar ratios of surfactant, cholesterol, and dicetyl phosphate. The formulated niosomes were found spherical in shape, ranging from 2.95 µm to 10.91 µm in size. Vesicles with 1 : 1 : 0.1 ratios of surfactant : cholesterol : dicetyl phosphate with each grade of span were found to have higher entrapment efficiencies, which were further selected for in vitro and in vivo studies. Vesicles formulated with sorbitan monostearate were found to have maximum drug release (99.091%) at the end of 24 hours and followed zero order release kinetics. The results of in vivo study revealed that the niosomes significantly enhanced the oral bioavailability of TDF in rats after a dose of 95 mg/kg. The average relative bioavailability of niosomes in relation to plane drug solution was found to be 2.58, indicating more than twofold increase in oral bioavailability of TDF. Significant increase in mean residential time (MRT) was also found, reflecting release retarding efficacy of the vesicles. In conclusion, niosomes could be a promising delivery for TDF with improved oral bioavailability and prolonged release profiles.

Design, synthesis, characterization, and computational studies on benzamide substituted Mannich bases as novel, potential antibacterial agents.

A series of benzamide substituted Mannich bases (1-7) were synthesized. The synthesized derivatives were authenticated by TLC, UV-Visible, FTIR, NMR, and mass spectroscopic techniques and further screened for in vitro antibacterial activity by test tube dilution method using amoxicillin and cefixime as standard drugs. The compounds 5, 6, and 7 were found to be the most active antibacterial agents among all the synthesized compounds. The physicochemical similarity of the compounds with standard drugs was assessed by calculating various physicochemical properties using software programs. The percent similarity of synthesized compounds was found to be good and compound 1 was found to have higher percentage of similarity. The compounds were subjected to QSAR by multilinear regression using Analyze it version 3.0 software, and four statistically sound models were developed with R2 (0.963-0.997), Radj2 (0.529-0.982), and Q2 (0.998-0.999) with good F (2.35-65.56) values.

Evaluation of the in vivo anti-inflammatory and analgesic and in vitro anti-cancer activities of curcumin and its derivatives.

Curcumin, obtained from turmeric, has several biological properties to make it a desirable template for drug development. A lipophilic derivative of curcumin, diacetyl curcumin (DAC) and a hydrophilic derivative, diglutaryl curcumin (DGC) were synthesized and their in vivo analgesic and anti-inflammatory activities were compared with those of curcumin and aspirin. The in vitro anti-cancer activities of curcumin and the two derivatives against three cell cancer lines were compared with those against a non-cancerous cell line. The inhibitory effects were comparable to each other and nearing that of curcumin while they showed low inhibitory effect towards the non-cancerous cell line. The mouse tail flick assay showed that curcumin, DAC and DGC increased latency time. DGC was most effective as an analgesic, even more so than aspirin. The maximum percentage effect (MPE) was highest with DGC at 3 hours. The carrageenan induced paw edema model indicated anti-inflammatory activity of all three curcumin formulations. The percentage inhibition of paw edema was maximum for DAC, followed by aspirin and curcumin.

Evaluation of the in vivo anti-inflammatory and analgesic activity of a highly water-soluble aspirin conjugate.

Glucose-aspirin (GA) was synthesized by conjugating aspirin (ASA) to the 3-carbon of glucose to produce a stable water-soluble aspirin derivative. The in vivo activities were compared with those of aspirin. The mouse tail flick assay showed that at 120 min., both aspirin and GA showed the maximum possible effect, and the higher dose (200 mg/kg) generally had less of an effect than the lower dose (100 mg/kg). Per cent inhibition of paw oedema was 63% and 69% for ASA and GA at 100 mg/kg, respectively. In the tail immersion test, the increase in reaction time was significantly greater with GA as compared to aspirin (100 mg/kg) at 60 min. In conclusion, there was significant anti-inflammatory and analgesic activity for GA at the doses studied under the experimental conditions.

Student evaluation of teaching and assessment methods in pharmacology.

BACKGROUND: The students are in the best position to comment on the effectiveness of any teaching system and they may be regarded as the best judges to assess the teaching and evaluation methods. OBJECTIVE: This study was designed to obtain student feedback on teaching and assessment methods in the subject of pharmacology and use it for improvement. MATERIALS AND METHODS: Based on student feedback from batch 2006, innovative strategies were implemented. To know the effect of these strategies feedback was obtained from subsequent batch 2007 using a written validated questionnaire covering various aspects of teaching and assessment methods. RESULTS: Students were satisfied with all teaching methods except lecture, seminars and pharmacy exercises. Majority of the students showed preference for tutorials, short answer questions and revision classes. All students felt that there should be more time for clinical pharmacology and bedside teaching. The performance score of the students (batch 2007) indicated improvement in their scores (12%) when earlier feedback suggestions were implemented. The pass percentage of the subsequent batch in university examinations improved from 90 to 100%. CONCLUSION: The implementation of suggestions obtained from students resulted in improvement in their performance. Hence, it is very essential to synchronize teaching and evaluation methods with special requirements of medical students.

Synthesis, evaluation and computational studies on a series of acetophenone based 1-(aryloxypropyl)-4-(chloroaryl) piperazines as potential atypical antipsychotics.

A series of 1-(aryloxypropyl)-4-(chloroaryl) piperazines have been synthesized and the target compounds evaluated for atypical antipsychotic activity in apomorphine induced mesh climbing and stereotypy assays in mice. The compounds 11 and 12 have emerged as important lead compounds showing potential atypical antipsychotic profile. The physicochemical similarity of the new analogs with respect to standard drugs clozapine, ketanserin, ziprasidone and risperidone was assessed by calculating from a set of 10 physicochemical properties using software programs. The test compounds demonstrated good similarity values with respect to the standard drugs. The potential of these compounds to penetrate the blood brain barrier (log BB) was computed through an online software program and the values obtained for the compounds suggest a good brain permeation.