Comparison of Mechanical Properties of PEEK and PMMA: An In Vitro Study.

AIM: Evaluation and comparison of flexural strength and hardness of heat-cured polymethylmethacrylate (PMMA) denture base with polyetheretherketone (PEEK). MATERIAL AND METHODS: A total of 80 samples of PEEK and PMMA were prepared and divided into two groups: group A and group B, of 40 each. Both the groups were further divided into subgroups consisting of 20 samples of PMMA and PEEK. The group A specimens were tested for flexural strength by universal testing machine (UTM), and group B samples were subjected to hardness test using Vickers microhardness tester. The values obtained were subjected to statistical analysis. The readings were subjected to an unpaired t-test for comparison of flexural strength and hardness of PEEK and PMMA. RESULT: The flexural strength of PEEK was 183 MPa, while that of PMMA was 84 MPa. The hardness of PEEK and PMMA was 24 VHN and 19.4 VHN, respectively. CONCLUSION: It was observed that PEEK can be a potential denture base material with superior properties as compared to PMMA. Further researches are needed to be carried out. CLINICAL SIGNIFICANCE: PEEK as a denture base exhibits adequate flexural strength prolonging its clinical longevity and overcoming the most common reason for the failure of PMMA denture base that results in fracture.

Comparative evaluation of marginal fit and axial wall adaptability of copings fabricated by metal laser sintering and lost-wax technique: An in vitro study.

PURPOSE: The present study aims to compare and evaluate the marginal fit and axial wall adaptability of Co-Cr copings fabricated by metal laser sintering (MLS) and lost-wax (LW) techniques using a stereomicroscope. MATERIALS AND METHODS: A stainless steel master die assembly was fabricated simulating a prepared crown; 40 replicas of master die were fabricated in gypsum type IV and randomly divided in two equal groups. Group A coping was fabrication by LW technique and the Group B coping fabrication by MLS technique. The copings were seated on their respective gypsum dies and marginal fit was measured using stereomicroscope and image analysis software. For evaluation of axial wall adaptability, the coping and die assembly were embedded in autopolymerizing acrylic resin and sectioned vertically. The discrepancies between the dies and copings were measured along the axial wall on each halves. The data were subjected to statistical analysis using unpaired t-test. RESULTS: The mean values of marginal fit for copings in Group B (MLS) were lower (24.6 µm) than the copings in Group A (LW) (39.53 µm), and the difference was statistically significant (P < 0.05). The mean axial wall discrepancy value was lower for Group B (31.03 µm) as compared with Group A (54.49 µm) and the difference was statistically significant (P < 0.05). CONCLUSIONS: The copings fabricated by MLS technique had better marginal fit and axial wall adaptability in comparison with copings fabricated by the LW technique. However, the values of marginal fit of copings fabricated that the two techniques were within the clinically acceptable limit (<50 µm).

Assessment of professional competency and need of smoking cessation counseling for dental students.

PURPOSE: The aim of this study was to analyze the smoking prevalence among dental students and to assess the need for promoting tobacco education and intervention by exploring their knowledge about smoking related risk factors. The study also examined the attitudes and practices of the students toward tobacco consumption, and their responsibilities toward the community. METHODS: In total, 53 male students participated in the study (21 juniors and 32 seniors). The training program was divided into three modules, and the questionnaire was administered before and after the counseling sessions, which provided the comparative data on the students' views about smoking cessation. RESULTS: The most commonly practiced mode of tobacco consumption was found to be cigarette smoking (90.6 %), while a few consumed Gutkha (9.4%). All the junior students (100%) reported to have been benefitted by the counseling program, while 68.8% of the students from the senior group reported the same. Bivariate statistical analysis was conducted using the Pearson's chi-square test for testing the difference across the age groups. P-values less than 0.05 were considered statistically significant. CONCLUSION: Curbing tobacco influence on dental students in their initial days can ensure a smoke-free life for them, as well as prevents them from feeling embarrassed or experiencing a lack of confidence while seeing their patients. Thus, tobacco education and intervention programs can motivate the students and increase their potential to be credible advisors regarding smoking cessation.

Tooth loss--how emotional it is for the elderly in India?

BACKGROUND: Tooth loss can be distressing and sometimes devastating as it can lead to the serious psychosocial consequences which can affect the person's quality of life. The purpose of this study is to explore and investigate the emotional effect of tooth loss and its relationship with the person's wellbeing. The aim also extends to learn and understand the psychological status of elderly and to alleviate the management process by keeping it as a guide. METHODS: A total of 212 (69 completely and 143 partially) edentulous patients were investigated for the effects of tooth loss before the replacement of teeth. The demographic variables such as age, gender and socioeconomic status were used to collect the data. Post treatment change in the emotional level was assessed by using a seven point 'Terrible-Delighted' Scale. RESULTS: The tooth loss acceptance in completely edentulous category was 52% in the first year of loss, which increased to 80% after three years; while in partially edentulous patients it increased from 14.3% to 38.1%. The emotional effects of tooth loss varied from person to person with significant differences between the two groups. P-values were obtained using Chi-Square test, p-value<0.05 is considered to be statistically significant. CONCLUSIONS: It is important to understand the problems associated with tooth loss, its emotional effects and the attitude of the elderly towards it. It has a profound impact on the lives of some people, especially when the tooth loss is taken as a serious life event.

Is advertising by dental professionals having a negative impact on consumers?: the perspectives of Indian consumers.

Advertising by dentists is a controversial issue. Many feel that advertising is necessary for creating dental awareness, whereas, many others feel that it should be banned to keep intact the ethical aspect of the profession, which aims at serving the community. This study explores consumers' ideas about advertising. A total of 562 respondents from various parts of India participated in this study. The response rate was 46.83%. The data were analyzed by applying the chi-square test of association and the Z test of difference between two proportions at 5% and 1% level of significance (i.e., p<.05 and p<.01).

Postural Assessment of Students Evaluating the Need of Ergonomic Seat and Magnification in Dentistry.

Dental students using conventional chairs need immediate change in their posture. Implementing an ergonomic posture is necessary as they are at high risk for developing musculoskeletal disorders. This study recommends the use of an ergonomic seat and magnification system to enhance the visibility and the posture of an operator. The aim of this study is to make a foray into the hazards caused by inappropriate posture of dental students while working. It also aims at creating a cognizance about the related health implications among the dental fraternity at large, and to understand the significance of adopting an ergonomic posture since the beginning of the professional course. In the present study, postures have been assessed by using rapid upper limb assessment (RULA). This method uses diagrams of body postures and three scoring tables to evaluate ones exposure to risk factors. Ninety students from II BDS (preclinical students in the second year of dental school) were assessed in three groups using three different seats with and without magnification system. The results recorded significantly higher RULA scores for the conventional seats without using the magnification system compared to the SSC (Salli Saddle Chair-an ergonomic seat) with the use of magnification system. A poor ergonomic posture can make the dental students get habituated to the wrong working style which might lead to MSDs (Musculoskeletal diseases). It is advisable to acclimatize to good habits at the inception of the course, to prevent MSDs later in life.

A simplified technique for custom made overdenture semi-precision attachments.

CONTEXT: Overdentures are the choice of treatment for most of them, but the only snag is its cost. In India, the rural areas are still deprived of quality treatment. This manuscript is showcasing a study, which is a cheaper, but effective way to provide the best to the patient. AIMS: The aim of this study was to develop a custom made system, which can be used as an alternative treatment for the management of patients who need overdentures. The primary objective of this study was to provide a cost-effective attachment with the best functional efficacy. MATERIALS AND METHODS: The semi-precision attachments were made by using the conventional technique of preparation of post space. The patterns were prepared by using the pattern resin material and the rest of the male and female attachments were fabricated by using innovative methods fulfilling the criteria. RESULTS: The attachments were successfully used in patients with remarkably good function and comfort. CONCLUSION: It was a successful attempt to provide the specialized treatment in affordable cost. There is a need of innovative work to make the sophisticated systems more economical and readily available.

Assessment of Oral Health Related Quality of Life Among Completely Edentulous Patients in Western India by Using GOHAI.

BACKGROUND: Quality of life in elderly is a very sensitive issue. It is important to know if the dental problems, general health and dental treatment have an impact on the quality of life in elderly. The elderly population has a typical set of mind regarding their oral health. This study examines the trends in patients' behavioral patterns due to tooth loss, suggestive of some change in quality of life. AIMS: The purpose of this study was to identify and acknowledge the problems of completely edentulous patients and their relationship to the Quality of Life (QOL). Also, the study was aimed at exploring the changes in global self-rated general health between the pre and post-treatment scores. SETTINGS AND DESIGN: This is a randomized controlled clinical trial study which is done to evaluate the problems in the elderly and quality of life as long as their oral health is concerned. It is conducted on a group of people representing the elderly population with complete edentulism. MATERIAL AND METHODS: Sixty three patients with mean age 69.41 who needed dentures were investigated before and after 6 months of their treatment by administration of GOHAI (Geriatric Oral Health Assessment Index) scale. Comparison between Pre & Post-treatment values of various scores were done with McNemar-Bowker Test. Quantitative data was represented using Mean ± SD and Median, IQR (Interquartile range). Analysis of Pre & Post-treatment quantitative data was done using Wilcoxon Signed Rank Test. RESULTS: The results of the present study showed GOHAI scores increased from 28.90 + 7.28 to 42.19 + 7.60 (p=highly significant). There was a significant change in the quality of life in elderly after their prosthodontic rehabilitation, though the self rated general health did not show any significant improvement. CONCLUSION: It is the responsibility of the entire dental fraternity to understand the needs of elderly associated to their oral health. It is important to evaluate and assess the psychological effects of tooth loss on their quality of life. A thorough investigation is necessary before and after the dental/prosthodontic care.

A diagnostic and therapeutic challenge involving a case of dysphagia in association with cervical osteophytosis and a dental pain.

Herein, presenting a case of a 42-year-old female with the chief complaint of dysphagia. The problem was assumed to be of dental origin, due to the onset of dental pain followed by dysphagia. A cervical radiograph revealed the presence of osteophytic lipping which proved to be the cause of dysphagia. Confusing and overlapping disease entities showing similar symptoms need thorough investigation. Dysphagia related to cervical spondylosis may have a direct connection with the person's occupation. Dentistry is considered a potentially hazardous occupation with regard to musculoskeletal disorders. However, additional studies are required to understand the occupational hazards faced by dentists.

Student apathy for classroom learning and need of repositioning in present andragogy in Indian dental schools.

BACKGROUND: In the world of technology, when today's student is approaching the on-line /distance learning in the open universities and doing on-line self-assessment, the classroom learning is vanishing slowly. Globally, teachers are taking efforts to improve the pedagogy by implementing effective methods to retain the classroom teaching and student attendance. The present study aims at shedding some light on the need of changing the adult education strategies (andragogy), which can effectively improve the student attendance for lectures. METHODS: It is an observational study, and the conceptual framework of it is based on beliefs, opinions and personal experiences of the respondents. Triangulation method is used for collecting the data. The data is achieved from three groups of concerned population who could provide valid results to support the study. It is collected by interviewing 10 senior faculty members who are/were the 'education experts' in the universities, while the main concerned groups of present educational stream, i.e. 'institution-teachers' and the 'students', were given questionnaires. 570 teacher respondents and 200 student respondents are the main participants of this study. RESULTS: As per data, it has been observed that senior faculty (90%) and students (93.25%) feel need of student motivation more than the institutional teachers (52.44%). P-values were obtained using Chi-Square test for testing the significance of difference between agreement and disagreement for a specific question. CONCLUSIONS: In India, Universities have already sensed the need of 'teacher development programmes'. But teachers in dental colleges, demand more efforts to be taken by universities and managements in this regard and expect better educational policies to give them accessibility to prove themselves.

Is advertising ethical for dentists? An insight into the Indian scenario.

BACKGROUND: The question of whether Indian dentists should advertise their services is an important issue with significant ethical and professional implications. Individual dentists may feel the need to advertise in order to establish or grow a dental practice, but what effect does this have on the standing of the profession as a whole? As health care professionals are bound by a code of ethics, should dentists be allowed to advertise? PURPOSE: The purpose of this study is to examine the attitudes of Indian dentists to the issue of advertising. It also aims to explore whether advertising could have positive benefits (to increase the community's awareness of dental health care, encourage better quality dental services, decrease unemployment in the industry, and help consumers choose a dentist), or, on the contrary, whether advertising could have a negative impact by undermining the reputation of the industry, in particular the definition of dentistry as a medical profession. METHODS: Of 1500 eligible participants, 423 dentists (28.2%) participated in the study. The questionnaire, comprising 14 questions, was provided to the respondents. The data was collected and analyzed by applying the "Chi-squared test" of association and the "Z test" of difference between two proportions at 5% and 1% levels of significance (ie, P = 0.05 and P = 0.01). RESULTS: A majority of 56.02% of the respondents were in favor of dentists advertising their services. The majority of dentists in favor of advertising were in the youngest age group (22-30 years, 75.86%). The older age groups were more likely to agree and comply with the government ban on advertising by dentists. CONCLUSION: While Indian culture and law does not regard advertising as ethical, in recent years there has been a change in the attitudes of dental professionals to the issue of advertising.