Aim: The aim of the systematic review was to assess the influence of dental prostheses on cognitive functioning in elderly population. Materials and Methods: This systematic review was conducted according to the PRISMA guidelines. The initial electronic search was conducted using the following search databases: MEDLINE (PubMed), Cochrane Library, Google Scholar, and EMBASE. The search was limited to English language using the search items/keywords: “dental prostheses and cognitive functioning,” “dental prostheses and brain function,” “Tooth loss and cognitive loss,” “mastication and prefrontal activity,” and “prostheses on mental state.” The search strategy was followed using the PICOS framework. Results: A total of 19 studies were selected according to the selection criteria. Out of 19 studies, 15 studies were included and 4 studies were excluded from the review. Conclusion: With the available evidence in the literature, it can be concluded that dental prostheses have a very significant role in preventing the cognitive impairment and act as a protective factor in enhancing the cognitive function in patients with dementia-related diseases and neurodegenerative diseases.
To establish a definitive grading system & derive classification of maxillary &mandibular tori based on shape . A cluster sample of 72 patients who sought treatment at the dental college with maxillary and/or Mandibular tori were selected, alginate impression were made for each patient and the stone casts poured were evaluated based on the following criteria; shape, prominence and dimensions (length, width, height) to surface a new grading system for the tori. From a total sample size of 72 patients with tori, 38 (52.8%) patients were dentulous (either fully or partially dentulous), and remaining 34 (47.2%) patients were edentulous. A total of 5 patients only had both maxillary and mandibular tori simultaneously present at the time of inspection, while all other 67 patients had only maxillary tori. From the 72 patients who presented with torus palatinus, in relation to the tori shape, 10 (13.9%) were flat, 43 (59.7%) were lobular, 16(22.2%) were spindle shaped and only 3 (4.2%) were of nodular shape. From the 5 patients who presented with torus mandibularis, 3 presented with tori of mild prominence, and 2 others presented with a moderately prominent mandibular tori.In relation to torus palatinus dimension, the width of tori varied widely from 4.0mm to 25.0mm, while the length too had a wide variation from 10.0mm to 37.0mm. The height however hadn’t as much variation, ranging from 0.5mm to 5.0mm. A successful grading system was accomplished in relation to maxillary tori and its effect on the prognosis of maxillary denture stability and retention could be determined from this grading system; however this was not successful for mandibular tori due to insufficient sample size of patients in this category. The grading system devised in our study was reasonable for use by dental graduates, though the study had short comings in few aspects that were not looked upon on initiation, it would be a stepping stone towards more research in this field in relation to maxillary and mandibular tori.. From this study, it is anticipated that Prosthodontist can have a precise idea of the tori to prosthesis relationship when faced with such patients in their day to day practice.
Cancers of the orofacial region can be devastating in their impact on physical structure and function of the affected individual, leading to potentially severe compromises in quality of life. A total of Twenty (20) mandibular resected patients were selected for this study. All the patients’ were rehabilitated with mandibular resection prosthesis. Novel scale known as Maxillofacial Prosthesis Performance Scale (MFPPS) was developed for mandibulectomy patients to assess the oral health related quality of life. This scale has been tested for validity and reliability. The OHRQol was measured using the oral health impact profile (OHIP-Edent-19), Obturator functioning scale (OFS-15) and Maxillofacial Prosthesis Performance Scale (MFPPS-10) with standardized questionnaire after 2 weeks & 3months of prosthesis function for twenty (20) mandibular resected patients. For OHIP –Edent scale; when comparing 2 weeks, all subscale scores shown significant progress on oral health impact profile-Edent scale after 3 months of prosthesis function. For OFS scale; when observing the score of 2 weeks and 3 months, there was dramatic improvement of (75%) in miscellaneous factors which include Problems in dryness of mouth, engagement in social events and obturator positioning. For MFPPS; all rehabilitated patients’ were observed two weeks later, negative impacts have been eliminated and positive impacts increased on oral health. The patient was reviewed again 3months later and confirming an even higher level of overall satisfaction with the Mandibular Resection Prosthesis. The maxillofacial prosthesis had a strong positive impact on quality of life .Hence mandibular resection prosthesis enhance the oral health related quality of life.
The aim of the study was to compare the shear bond strength of porcelain to three commercially available cobalt-chromium alloys. There were studies evaluating shear bond strength between porcelain and nickel chromium alloys and hence this study was conducted to evaluate shear bond between cobalt-chromium alloys. Our objective is to evaluate the pattern of bonding of porcelain to cobalt-chromium alloys and also to compare the shear bond strength of porcelain with cobalt-chromium alloys. A total of 30 samples, each 10 samples of Castco, Wironit, and Girobond NBS cobalt-chromium alloy were subjected to porcelain (Vita V60 i-Line) firing. After the porcelain firing, all the samples were then tested for the shear bond strength by using the Instron (Universal testing machine). After testing the samples, the data were tabulated and analysed using one way ANOVA test (p<0.05) using the SPSS software. The mean shear bond strength of Wironit alloy on porcelain when evaluated was 9.9 with standard deviation of 1.92. The mean shear bond strength of Castco alloy on porcelain was 11.9 with standard deviation of 3.5. The mean shear bond strength of Girobond NBS alloy on porcelain was 9.9 with standard deviation of 3.1. From the above results, it was concluded that the Castco alloy achieved significantly higher bond strength compared to the other two. Given the sample size, we conclude that Castco has superior bond strength over Wironit and Girobond NBS. In future, research relating to the tensile and compressive bond strength between porcelain and cobalt-chromium alloy can be considered.
Maxillofacial defects cause impact on oral health related quality of life (OHRQol) including limitations in functional activities, communication, social interaction, and intimacy. The obturator prosthesis is commonly used as an effective means for rehabilitating maxillectomy patients. The purpose of this study was to investigate impact of definitive obturator prosthesis on oral health related quality of life. In the period between 2015 -2017, a total of twenty five (25) patients with acquired maxillary defects based on Okay classification have been selected and rehabilitated with definitive obturator prostheses .The OHRQol was measured using the Oral Health Impact Profile (OHIP-Edent-19) and Obturator functioning scale (OFS) with standardized questionnaire after 2 weeks & 3months of prosthesis function.To find the significant difference between the bivariate samples in Paired groups the Wilcoxon signed rank test was used. With respect to oral health impact profile –Edent 19 scale, the mean functional limitation score were 6.72 and 5.20 indicates that there is significant improvement in chewing performance after 2 weeks and 3 months of prosthesis function. Significant improvement in oral health impact profile was noticed in physical (M = 5.84, 4.88), Psychological (M=4.84, 3.96) and social disabilities (M=5.28, 4.16). Similarly, when observed with Obturator functioning scale, significant improvement were noted in chewing performance phonetics, appearance and miscellaneous aspects. Analysing the OHIP –Edent-19 scale and obturator functioning scale (OFS-15), statistically significant differences (Wilcoxon rank test p value = 0.0005) were observed. Within the limits of this study, it can be concluded that highly positive correlation exists between definitive obturator prostheses and oral health related quality of life (OHRQol).
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