scholarly journals Survey of current materials and impression techniques for Complete Dentures among Nepalese Prosthodontists

2018 ◽  
Vol 14 (2) ◽  
pp. 75-80
Author(s):  
Amar Bhochhibhoya ◽  
Binod Acharya ◽  
Samskar Bickram Rana ◽  
Rinu Sharma ◽  
Jemish Acharya ◽  
...  
Keyword(s):  
Acrylic Resin ◽  
Complete Denture ◽  
Complete Dentures ◽  
Medical College ◽  
Institutional Review ◽  
Impression Materials ◽  
Ethical Approval ◽  
Irreversible Hydrocolloid ◽  
Removable Prosthesis ◽  
Materials Used

ABSTRACTBackground: Impression making is one of the critical factors in determining success or failure of complete denture therapy. The precise reproduction of edentulous foundation is essential for retention, stability, and support of the removable prosthesis. Evidence suggests that there is variability in materials and techniques regarding impressions making for complete dentures. There is little published information on studies conducted among Nepalese Prosthodontists. The purpose of this study was to evaluate current materials andmethods for impressions for complete denture prosthodontics in Nepal. Materials & Methods: A questionnaire based survey was conducted among Nepalese Prosthodontists. Ethical approval for the beginning of the study was obtained via Institutional Review Committee, Nepal Medical College. A self-administered anonymous questionnaire was distributed to the participants. Data were analyzed by using frequency distribution.Results: Majority of responses indicated use of irreversible hydrocolloid in stock metal tray for making the preliminary impression. The selective pressure was the predominantly used impression philosophy (78.3%). The most common material for the fabrication of custom trays was autopolymerizing acrylic resin (96.7%). All respondents border molded the custom tray prior to making the final impression. The final impression materials used were zinc oxide eugenol impression paste (73.3%), polyvinylsiloxane (11.7%), polyether (11.7%) and polysulphide (3.3%). Conclusion: Although there is variability in impression materials andtechniques used by Prosthodontists in Nepal for the fabrication of complete dentures, the results showed interesting trends. Most practitioners followed the traditional techniques of complete denture impression procedures.Keywords: complete denture; custom tray; edentulism; impression.

scholarly journals Processing Errors in Complete Denture Fabrication - A Survey

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 1371-1377
Author(s):  
Farhat Yaasmeen Sadique Basha ◽  
Venkatesh Kommi ◽  
Raj S S
Keyword(s):  
Patient Satisfaction ◽  
Dental Students ◽  
Complete Denture ◽  
Complete Dentures ◽  
Elder Patients ◽  
Facial Shape ◽  
Cad Cam ◽  
Materials Used ◽  
Edentulous Patients ◽  
Processing Errors

There has been an increase in the incidence of complete edentulism among the elder patients. Complete dentures are the most common and preferred treatment of choice. Complete dentures help in masticatory function and restore the facial shape of the edentulous patients. Fabrication of the complete dentures is, therefore, a very important task for the clinician to ensure patient satisfaction. Errors may occur during the denture fabrication and these are called processing errors. It is a multifactorial process. The aim of the survey is to study the errors that occur during processing of a complete denture. It is a questionnaire based study conducted with a batch of 100 dental students. The questionnaire consisted of 16 questions focused on different fabrication techniques, timing, materials used, etc. by various students. The data collected was represented statistically and discussed. Dough technique was the most preferred method adopted by 39% of the students. Shorter curing cycles produced less defects, but majority of the students used longer cycles (41%). Most of them reported fractures (16%) and microporosities (11%) as defects. We can conclude that there are a few areas of error during the processing of dentures by the dental students. The incidence of these errors, however appears to be low. There is a scope for CAD/CAM complete dentures in the future to eliminate the possibilities of errors.

scholarly journals Marginal adaptation of provisional crowns made of acrylic and bisacrylic resins using different impression materials

2019 ◽  
Vol 18 ◽  
pp. e191603
Author(s):  
Camilla Lopes Cerqueira ◽  
Roniel Kappler ◽  
Andrea Araújo Nobrega Cavalcanti ◽  
Emilena Maria Castor Xisto Lima
Keyword(s):  
Marginal Adaptation ◽  
Tukey Test ◽  
Prosthetic Materials ◽  
Acrylic Resins ◽  
Impression Materials ◽  
Direct Technique ◽  
Significant Difference ◽  
Irreversible Hydrocolloid ◽  
Marginal Discrepancy ◽  
Materials Used

Aim: To evaluate the marginal adaptation of provisional crowns made of acrylic and bisacrylic resins using different impression materials. Methods: a metal die and a matrix applied through a direct technique were used to fabricate the specimens. The impression materials used as a matrix were divided into four groups: Irreversible hydrocolloid
(IH), laboratory silicone (LS), condensation silicone (CS), and addition silicone (AS). After the impression procedures, each matrix was loaded with the provisional prosthetic materials, Alike, Duralay, Protemp 4, and Structur 3 (n = 12). Marginal discrepancy was evaluated using a stereomicroscope at ×45 magnification. The images obtained were transferred to the Corel Draw X7 program, and the distances from the cervical margins of the specimen to the reference lines at the metal die were measured vertically. The data were analyzed by using 2-way ANOVA followed by the Tukey test (α=.05). Results: the acrylic resins had higher values ​​of marginal discrepancy compared to the bisacrylic resins. A statistically significant difference was found between all impression materials, and the irreversible hydrocolloid presented higher values of discrepancy (303.28–613.31 μm), whereas addition silicone had the lowest (48.61–190.06 μm). Conclusions: the bisacrylic resins had a better marginal adaptation compared to the acrylic resins. The addition silicone promoted a better marginal adaptation of the provisional prosthetic materials tested, followed by condensation silicone, laboratory silicone, and irreversible hydrocolloid.

scholarly journals Higher Termination of Brachial Artery in Cadavers in the Department of Anatomy of a Medical College: A Descriptive Cross-sectional Study

2021 ◽  
Vol 59 (240) ◽  
Author(s):  
Sanzida Khatun ◽  
Diwakar Kumar Shah
Keyword(s):  
Surgical Procedures ◽  
Brachial Artery ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Medical College ◽  
Institutional Review ◽  
Reference Number ◽  
Ethical Approval ◽  
Usual Site

Introduction: The main blood supply for arm is provided by the brachial artery. It shows variation in branching and termination patterns in some individuals. Variation in brachial artery may cause difficulties during various clinical and surgical procedures. The present study aims to find out the prevalence of higher termination of brachial artery in cadavers in the department of anatomy of a medical college. Methods: A descriptive cross-sectional study was carried out from 10th January 2020 to 20th April 2021 after the ethical approval was taken from the Institutional Review Committee of Nobel Medical College (reference number: IRC-NMCTH 280/2020). The study was done in 58 upper limbs of 29 properly embalmed cadavers. Convenient sampling was done. They were carefully dissected. The level of termination of brachial artery was noted. The length of the brachial artery and the distance between its termination and the intercondylar line of humerus was recorded. Results: Higher termination of brachial artery was observed in 3 (5.17%) extremities; one (1.72%) at middle third of arm and two (3.45%) at lower third of arm. In 52 (89.66%) extremities, the site of termination was at the level of neck of radius. The brachial artery terminated a few centimeters below its usual site at the level of upper part of shaft of the radius in 3 (5.17%) extremities. Conclusions: The prevalence of higher termination of brachial artery in cadavers is slightly lower than the studies performed in similar settings. It is not an uncommon finding. It may have impact on clinical and surgical procedures.

A technique to fabricate an interim implant-supported fixed complete denture for immediate loading

2020 ◽  
Author(s):  
Oguz Ozan ◽  
Tolga Pekperdahci ◽  
Doruk Kocyigit ◽  
Burak Yilmaz
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Acrylic Resin ◽  
Complete Denture ◽  
Immediate Loading ◽  
Tissue Surface ◽  
Materials Used

Converting an acrylic resin removable complete prosthesis into a fixed implant-supported prosthesis to immediately load the implants can be a challenging procedure. Using acrylic resin to secure titanium interim copings intraorally may be a difficult task, and any process to facilitate this procedure may be advantageous for the clinician and the patient. This report describes a technique for facilitating the fabrication of an interim immediately loaded implant-supported fixed complete prosthesis. This technique and the materials used enabled the efficient fabrication and delivery of the prosthesis with an appropriate soft tissue surface and acrylic resin thickness without irritating newly sutured soft tissues.

scholarly journals Knowledge, Attitude and Practices among Mothers of Children 6 to 24 months of Age Regarding Complementary Feeding

2020 ◽  
Vol 58 (230) ◽  
Author(s):  
Sabina Shrestha ◽  
Manoj Pokhrel ◽  
Smriti Mathema
Keyword(s):  
Complementary Feeding ◽  
Complementary Foods ◽  
Medical College ◽  
Institutional Review ◽  
Ethical Approval ◽  
Nutritional Needs ◽  
Knowledge And Practice ◽  
Knowledge Attitude And Practice ◽  
Initiation Of Breastfeeding ◽  
Structured Questionnaire

Introduction: Complementary foods fill the gap between the total nutritional needs of the child and the amounts provided by breast milk. Inappropriate feeding practices are a major cause of the onset of malnutrition in young children. The objective of this study was to assess the knowledge, attitude, and practices of mothers of children between 6 to 24 months of age regarding complementary feeding. Methods: This Knowledge, Attitude, and Practice Study was conducted among 250 mothers in Kathmandu Medical College and Teaching Hospital from June 2019 to November 2019 after obtaining ethical approval from the institutional review committee (Ref no. 150320199). Convenient sampling method was applied. The mothers of children between 6 to 24 months were interviewed using a structured questionnaire to ascertain the knowledge, attitude, and practices regarding complementary feeding. Statistical analysis was done using SPSS version 20. Results: Two hundred and fifty mothers were interviewed. 151 (60.4%) mothers knew initiation of breastfeeding soon after birth and 179 (71.6%) were knowledgeable about exclusive breastfeeding for 6 months. 161 (64.4%) mothers knew the proper age of initiating complementary feeding but only 139 (55.6%) mothers practiced it. Early initiation of complementary feeding was done by 87 (34.8%) mothers while 24 (9.6%) mothers delayed it beyond 6 months. Conclusions: There was a gap in knowledge and practice among mothers regarding adequate age of initiation of complementary feeding, complementary foods, preparation, and practices.  

scholarly journals Morphological Variations of the Lungs: A Cadaveric Study

2021 ◽  
Vol 23 (4) ◽  
pp. 315-318
Author(s):  
Ajeevan Gautam ◽  
Rajib Chaulagain ◽  
Deepesh Dhungel
Keyword(s):  
Blood Circulation ◽  
Pleural Cavity ◽  
Left Lung ◽  
Water Tank ◽  
Review Committee ◽  
Morphological Variations ◽  
Medical College ◽  
Institutional Review ◽  
Ethical Approval ◽  
Oblique Fissure

The lungs are the organs of respiration which are situated on either side of the heart and other mediastinal contents in its pleural cavity. A fresh lung is spongy, can float in water and crepitates when handled. Lungs are important with respect to its blood circulation. The lungs are divided by fissures into lobes which facilitate movements of lobes in relation to one another. The hilum of each lung is its gateway. In the present study, we aim to assess the morphological variations of human cadaveric lungs at Chitwan Medical College (CMC). An observational study was conducted at dissection hall of anatomy department at Chitwan Medical College from September 2019 to October 2020 after taking ethical approval form Institutional Review Committee of CMC. All the intact 70 lungs present in the department were studied. Photographs of the intact lungs were taken from different surface. The lungs were porus, highly elastic and spongy in texture. On keeping lungs to water tank it got floated. We found 34(80.96%) of the studied specimen of right side had horizontal fissure present in it. The remaining 8 (19.04%) specimens did not have horizontal fissures, while 3 (5.88%) specimens had incomplete fissures. The oblique fissure was not present in 2 (2.38%) of the study specimens. The left side of the study specimen has a variance of 1(4.16%). When the hilum right lung was examined, 40 (95.23%) of the structure had the usual organization pattern. In the left lung, the usual pattern of organization was 21(75%). The differences are thought to be present in the lung’s fissure and hilum. The current study’s findings are therapeutically important. The findings could prove beneficial to cardiovascular and thoracic surgeons.

scholarly journals Clinical implications of elastomeric impression materials used for complete denture construction

2018 ◽  
Vol 6 (1) ◽  
pp. 19 ◽  
Author(s):  
Haroon Rashid ◽  
Muhammad Rameez ◽  
Shoaib Razi ◽  
Fatima Farhan ◽  
Bharat Kumar
Keyword(s):  
Complete Denture ◽  
Clinical Implications ◽  
Impression Materials ◽  
Materials Used

Stainability of acrylic resin materials used in CAD-CAM and conventional complete dentures

2020 ◽  
Vol 123 (6) ◽  
pp. 880-887 ◽  
Author(s):  
Faisal D. al-Qarni ◽  
Charles J. Goodacre ◽  
Mathew T. Kattadiyil ◽  
Nadim Z. Baba ◽  
Rade D. Paravina
Keyword(s):  
Acrylic Resin ◽  
Complete Dentures ◽  
Cad Cam ◽  
Materials Used

scholarly journals Comparison of Different Final Impression Techniques for Management of Resorbed Mandibular Ridge: A Case Report

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Bhupender Yadav ◽  
Manisha Jayna ◽  
Harish Yadav ◽  
Shrey Suri ◽  
Shefali Phogat ◽  
...  
Keyword(s):  
Case Report ◽  
Clinical Examination ◽  
Mean Value ◽  
Complete Denture ◽  
Complete Dentures ◽  
New Techniques ◽  
Impression Materials ◽  
Significant Difference ◽  
History Of ◽  
Green Stick

The history of complete denture impression procedures has been influenced largely by the development of impression materials from which new techniques and ideas arose. The purpose of this study was to compare the retention of complete dentures made by using different impression techniques like conventional, admixed, all green, and functional techniques. The results showed that there was significant difference in retention between the six techniques where functional technique showed the highest mean value of retention followed by elastomeric, all green, and admixed, while cocktail and green stick compound showed the lowest mean value. However, on clinical examination, the retention produced by the six techniques was satisfactory.

scholarly journals Clinical Evaluation of Residual Ridge Morphology of Maxillary Arch in Relation to Ageing and Length of Edentulism

2019 ◽  
Vol 15 (4) ◽  
pp. 230-234
Author(s):  
Rinu Sharma ◽  
Amar Bhochhibhoya ◽  
Binod Acharya ◽  
Samskar Bikram Rana
Keyword(s):  
Clinical Evaluation ◽  
Classification System ◽  
Type A ◽  
Complete Denture ◽  
Age Group ◽  
Complete Dentures ◽  
Factors Affecting ◽  
Medical College ◽  
Edentulous Patients ◽  
Maxillary Arch

Background: Ridge morphology is one of the important recognized factors affecting denture retention, stability, support and masticatory function in edentulous patients. The form of ridge affects the planning as well as determines the prognosis of treatment. The objective of this study was to assess maxillary residual ridge morphology according to American College of Prosthodontists (ACP) classification system and to find association between type of ridge morphology of maxillary arch with age and duration of edentulism.     Methods: The study was conducted among 87 completely edentulous patients above 40 years of age visiting department of prosthodontics Nepal Medical College. The morphology of maxillary residual ridges were clinically evaluated and classified according to criteria given by American College of Prosthodontists (ACP) classification system. The findings were associated with age, sex, duration of edentulism and complete       denture wear. Results: In this study, more than two thirds of the patients belonged to the age group of 60 – 80 years and their mean duration of edentulousness was seen to be 5.7 years. One fifth of the patients were using previous complete dentures. Type A maxillary ridge morphology was found to be the most prevalent. The type of maxillary ridge morphology was not found to be associated with either age or gender of an  individual however it varied significantly with length of edentulism and duration of complete denture wears.              Conclusions: Within limitations, it can be concluded that maxillary ridge morphology was not associated with age of an individual however the longer duration of edentulism or complete denture use would make the type of ridge morphology more unfavorable. Keywords: maxillary ridge; length of edentulism; residual ridge resorption; ridge morphology.

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