IP Annals of prosthodontics and restorative dentistry, Mar 15, 2024
Artificial intelligence (AI) is an evolving and assuring approach in healthcare and has begun to ... more Artificial intelligence (AI) is an evolving and assuring approach in healthcare and has begun to improve the dental science ever since. A subgroup of AI called deep learning (DL) related convolutional neural network algorithm have showed significant applications in computer based tasks and have been shown to be fairly applicable for dental image recognition and treatment planning analysis. This article aims to review the adaptation of artificial intelligence in identifying implant systems and abutments using deep learning concept. This is an Open Access (OA) journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
Amelogenesis imperfecta is a hereditary disorder displaying a group of conditions which cause dev... more Amelogenesis imperfecta is a hereditary disorder displaying a group of conditions which cause developmental alterations in the structure of enamel. The adverse effects it has on the oral health and quality of life of the individual warrants the identification of the contributing factors for the excessive wear and loss of vertical dimension. Extensive restorative treatment is imperative for the correction of such severely worn out dentition. Rehabilitation in such patients improves aesthetics, function and comfort. This case report presents a systematic approach in rehabilitating a case of hypomaturation type Amelogenesis Imperfecta (AI) following Hobo twin stage philosophy.
International Journal of Dental Materials, Dec 31, 2022
The horizon of implant dentistry has been ever-expanding owing to its longterm success in rehabil... more The horizon of implant dentistry has been ever-expanding owing to its longterm success in rehabilitating partially or completely edentulous cases. This perennial success and efficiency have encouraged clinicians to use osseointegrated implants to replace teeth lost in children either due to trauma or congenital absence. Although a myriad of studies and publications suggest the placement of implants only after the attainment of skeletal maturity, as the growth-related changes such as remodelling, displacement, and mesial drift can put the future of implant and restoration in jeopardy, the use of implants in young pubescent or adolescent looks promising due to its evident psychological and social advantages over other contemporary alternatives such as a removable prosthesis or resin-bonded bridge. The first case report highlights a 16-year follow-up of a young girl treated at the age of 10 with an implant-supported prosthesis for the replacement of a missing maxillary left central incisor. The second case report centers around a 19-year-old teenage girl who underwent rehabilitation with a permanent fixed prosthesis, replacing her previous implant-supported temporary prosthesis. The implant was initially placed when she was 10 years old.
The use of last few remaining teeth in a ravaged dentition to improve the stability and retention... more The use of last few remaining teeth in a ravaged dentition to improve the stability and retention of prosthesis is an age old concept. Retention is improved greatly by use of attachments, but many are deprived of overdenture treatment because of financial constraints. This article describes a novel method of fabricating a quinvilivan overdenture attachment by use of a metal press button. This acts as the male component and orthodontic separators are used as the female component. This technique provides a reasonable amount of retention in a cost effective and simple way. INTRODUCTION Over the past few years number of edentulous patients among the general population has risen steeply.Even though rehabilitation of edentulous ridge with implant spersists, it is an expensive treatment not afforded by many. Preventive prosthodontics including over dentures comes into play to meet the increasing demands of thee dentulous patients under these circumstances. Over denture is a favored treatme...
IP Annals of Prosthodontics and Restorative Dentistry
To present clinical strategies for prosthetic rehabilitation of completely edentulous patients us... more To present clinical strategies for prosthetic rehabilitation of completely edentulous patients using immediate-loading basal implants. A 58-year-old female patient was referred to the Department of Prosthodontics for restoration of her completely edentulous maxilla and mandible with a fixed full-arch implant-prosthetic rehabilitation. Since the patient lacks adequate bone in the posterior maxilla and is not willing to undergo a removable interim prosthesis, an immediate loading protocol along with 8 single-piece basal implants, including 2 pterygoid implants in the maxillary arch and 6 single-piece basal implants in the mandibular arch, was selected as the treatment option, followed by an acrylic provisional restoration. Four months later, a definitive fixed implant-supported prosthesis was delivered. This treatment strategy may be considered for rehabilitating patients with atrophic ridges demanding fixed provisional prostheses throughout the healing period and can be employed even...
Introduction: This study aims to evaluate the surface wettability of addition silicone impression... more Introduction: This study aims to evaluate the surface wettability of addition silicone impression materials, which were treated with two different disinfecting agents for two different time intervals. Methods: Twenty-five rectangle-shaped specimens from each of two different addition silicone impression materials (Express GT and Flexceed) were prepared. Five samples from each impression material were kept as the control without any disinfection. The rest of the specimens were divided into two groups according to the disinfecting agents, (2% Glutaraldehyde and 0.5% sodium hypochlorite) and disinfected for two time periods (10 minutes, and 60 minutes). Later, surface wettability was tested and recorded. Data were analyzed with analysis of variance (ANOVA). Results: The mean contact angle values of both impression materials at 10 minutes of disinfection were reduced when compared to the control group (without disinfection). As the disinfection time increases there was a tendency of dec...
The purpose of the present study was to evaluate the biocompatibility and osteoconductive potenti... more The purpose of the present study was to evaluate the biocompatibility and osteoconductive potential of pure and pigment forms of titanium dioxide. Pure and pigment forms of titanium dioxide were incorporated into prepared bur holes in the femur bone of rabbits. Implantation was done on six Albino rabbits which were sacrificed at the end of 3rd, 4th and 5th months after implantation. Radiographic, histologic and scanning electron microscopic evaluations of the implanted sites were performed. Heamatologic and soft tissue response to these materials were also evaluated. The results showed that both pure and pigment forms of titanium dioxide are biocompatible and have good osteoconductive properties. It was concluded that titanium dioxide can be effectively used in the augmentation of osseous defects and inadequate ridge forms.
Modern dentistry changed tremendously with implant surgery.For a successful implant therapy a pro... more Modern dentistry changed tremendously with implant surgery.For a successful implant therapy a proper diagnosis and treatment plans is required. Teeth loss may be due to physiological as well as pathological factors are common. The complete loss of teeth causes various problems like difficulty in mastication, improper phonetics, and unacceptable esthetics of patients.Implant supported prosthesis give the dentist an opportunity to restore normal function and esthetics.Successful osseointegration enables dentist and patient to accept a full arch dental prosthesis.
Aim: To systematically review the reported techniques, for evaluating the risk and difficulty enc... more Aim: To systematically review the reported techniques, for evaluating the risk and difficulty encountered in the management of fractured abutment screw in accordance with the location of fracture, and to develop a logical sequence in managing an implant abutment screw fracture. Settings and Design: Systematic review following PRISMA guidelines. Materials and Methods: A systematic search of the PubMed/MEDLINE database for articles published between January 2000 and March 2020 was performed by 2 independent reviewers. Case reports and case series that described the management of fractured implant abutment screw were included. Published articles were qualitatively analyzed employing CARE guidelines and were classified according to the location of screw fracture with respect to implant platform, risk of damage to the implant, and intervention for managing the fractured screw. Statistical Analysis Used: Qualitative analyisis. Results: A total of 28 articles were included in the review. Two of them explained the management of screw fracture at or above the implant platform and required only mild approach with low risk while the others explained the management of screw fracture below the level of implant platform. Among them, 6 were considered mild approach with low risk, 13 moderate approach with moderate risk, and 8 of them severe approach with high risk. Conclusion: Irrespective of the technique, any attempt to retrieve abutment screw fragment poses some risk to the implant which is varying from mild to severe. As the location of fracture is more gingival to the implant platform, difficulty of retrieval as well as risk to the implant increases. The proposed decisionmaking tree will be a useful tool in helping clinicians to manage abutment screw fracture.
International journal of scientific research, 2020
The emergence of stem cell therapy has given a great fill up for the future of tissue regenerativ... more The emergence of stem cell therapy has given a great fill up for the future of tissue regenerative medicine. Dental stem cells have great potential because of its accessibility, plasticity and proliferative ability. Various studies have shown that stem cells are primarily found in 'niches' and dental tissues are a rich source of mesenchymal stem cells that are useful for tissue engineering application. Several types of dental stem cells have been identified including those from human dental pulp, primary exfoliated deciduous teeth, periodontal ligament, third molar follicles etc. Many studies are still in nascent stages but it is imperative that stem cells and tissue engineering will give rise to a separate branch of regenerative dentistry which will leave an indelible print in future of dental practice.
The Mac Boyle retainer should be employed only under the most favourable conditions and when work... more The Mac Boyle retainer should be employed only under the most favourable conditions and when workmanship is of the highest order. When a Mac Boyle retainer is constructed by one who understands its limitations and does not exceed its potentialities, the prosthesis will have a surprisingly long life. When its use can be justified, minimal tooth surface is covered by metal. It is akin to the partial veneer crown, but the preparation is not so deep and the retention is derived from grooves at the labial line angles instead of on the proximal surfaces.
International Journal of Oral Health Dentistry, 2020
The loss of an eye is an emotional and psychological setback to the patient. An ocular prosthesis... more The loss of an eye is an emotional and psychological setback to the patient. An ocular prosthesis is given to uplift the patient psychologically and to boost up patient's self esteem and their social acceptance in the society. To improve the comfort and matching of the prosthesis with that of the adjacent natural eye a custom made ocular prosthesis is preferred. Ocular prosthesis can be given as stock eye shell or by fabrication of custom-made eye prosthesis by sclera painting. Advantages of custom-made eye prosthesis are well established over stock eye shell so, this article presents a case report of a patient-wearing stock eye shell with poor esthetics, and the same was replaced with custom-made eye prosthesis.
International Journal of Applied Dental Sciences, 2021
Physiologic rest position of the mandible is an important parameter to be considered in the fabri... more Physiologic rest position of the mandible is an important parameter to be considered in the fabrication of a complete denture as well as in a case of full mouth rehabilitation. Violation of the rest position would lead to detrimental effects on the facial musculature and the temporomandibular joint. This article reviews the various concepts pertaining to the rest position of mandible and its clinical implication.
The facial region defects caused by trauma, accident, tumour or congenital defects are treated wi... more The facial region defects caused by trauma, accident, tumour or congenital defects are treated with maxillofacial prostheses. A part from esthetics, the most common problem encountered with these prostheses is the retention of prostheses. Recent techniques along with newer materials, treatment options, and its application are described. The success of maxillofacial prostheses in meeting the expectations of patients and prosthodontists is on rise with the development of adhesive material science, the emergence of technical knowledge, and the development of implant technology. Increase in retention provides ease of use and psychological acceptance by the patient thereby improving the long-term prognosis of the prosthesis. In the present article review, the methods used for the retention of prostheses from past to present along with the advantages of adhesives and implants, implementation of 3D technology and rapid prototyping were critically appraised.
IP Annals of Prosthodontics and Restorative Dentistry
The first Covid case in India was reported in Kerala. Kerala’s attempt to contain Covid 19 in the... more The first Covid case in India was reported in Kerala. Kerala’s attempt to contain Covid 19 in the initial period was praised nationally and internationally. This study is a humble attempt to study the impacts of the pandemic outbreak on academic activities, clinical training, and occupational expectations of prosthodontics postgraduate students in Kerala during the period of October 2020 to December 2020. A set of 20 close-ended questions were formulated. The questionnaire was circulated online using google forms among the postgraduate students pursuing prosthodontics in dental colleges in Kerala. Prosthodontic Postgraduate students of dental colleges in Kerala who were willing to participate in the study and gave informed consent were included in the study. Even though Prosthodontic postgraduate students appeared comfortable with technology adaptations for a didactic curriculum, internet connectivity issues were a major hindrance to the smooth conduction of online academic activiti...
Background: Different pattern materials do not produce copings with satisfactory, marginal accura... more Background: Different pattern materials do not produce copings with satisfactory, marginal accuracy when used on stone dies at varying time intervals. Purpose: The purpose of this study was to evaluate and compare the vertical marginal accuracy of patterns formed from three materials, namely, thermoplastic resin, light cured wax and inlay casting wax at three-time intervals of 1, 12, and 24 h. Methodology: A master die (zirconia abutment mimicking a prepared permanent maxillary central incisor) and metal sleeve (direct metal laser sintering crown #11) were fabricated. A total of 30 stone dies were obtained from the master die. Ten patterns were made each from the three materials and stored off the die at room temperature. The vertical marginal gaps were measured using digital microscope at 1, 12, and 24 h after reseating with gentle finger pressure. Results: The results revealed a significant statistical difference in the marginal adaptation of three materials at all the three-time intervals. Light cured wax was found to be most accurate at all time intervals, followed by thermoplastic resin and inlay casting wax. Furthermore, there was a significant difference between all pairs of materials. The change in vertical marginal gap from 1 to 24 h between thermoplastic resin and light cured wax was not statistically significant. Conclusion: The marginal adaptation of all the three materials used, was well within the acceptable range of 25-70 µm. The resin pattern materials studied revealed significantly less dimensional change than inlay casting wax on storage at 1, 12, and 24 h time intervals. They may be employed in situations where high precision and delayed investing is expected.
Background and Objectives: Acrylic resin had a long history of been used in the fabrication of de... more Background and Objectives: Acrylic resin had a long history of been used in the fabrication of denture fabrication since they exhibit a better chemical bond between teeth and denture base. With increasing use of dentures, detachment of teeth from dentures also increased proportionally. Denture disinfection is an essential procedure for maintaining good hygiene of the denture. The aim of the study is to evaluate the effect of disinfection on shear bond strength between denture teeth and heat activated denture base. Objectives 1. To evaluate the shear bond strength between heat activated acrylic resin denture base and denture teeth measured using a universal testing machine (Instron) expressed in MPa. 2. To analyse the bonding failure between the denture tooth and heat activated acrylic resin interface using a stereomicroscope at 25 X magnification. Methodology: Two commercial brands of denture teeth (Acryrock and Ivostar) and heat activated acrylic resin denture base were tested. There were 12 subgroups in the study. Each brand of denture teeth was divided into six subgroups comprising of five experimental subgroups and one control group. In subgroup A1B1 and A2B2 (chemical disinfection) the specimens were immersed in 4% of chlorhexidine and sodium perborate monohydrate solution for 15 minutes daily for 19 days respectively, Subgroup A3B3 specimens (mechanical disinfection) were subjected to mechanical disinfection for 14 hours and in Subgroup A4B4 and A5B5 specimens were subjected to mechanical disinfection for 14 hours followed by disinfection with 4% chlorhexidine solution and sodium perborate monohydrate solution for 15 minutes daily for 19 days respectively. In Control group A6B6 specimens were immersed in distilled water at 37degree Celsius for 19 days. Shear bond strength testing was performed at denture tooth resin interface in a universal testing machine at a cross head speed of 1mm/minute. Bond strength failure rates were quantified and classified as adhesive, cohesive or mixed. Data were analyzed by independent t test and chi-square test. Results: In subgroupA1B1 and subgroupA2B2, (chemical disinfection) the specimens immersed in 4% of chlorhexidine (p=0.615) and sodium perborate monohydrate (p=0.615), for 19 days respectively, subgroup A3B3 (mechanical disinfection) specimens were subjected to mechanical disinfection for 14 hours (p<0.01), subgroup A4B4 and A5B5 (mechanical-chemical disinfection) (p<0.01) and (p<0.01) respectively, subgroup A6B6 (control group) (p=0.054). For bond failure analysis where p value for subgroup A1B1 is 0.856, p value for subgroup A2B2 is 1.000, P value for subgroup A3B3 is 1.000, p value for subgroup A4B4 is 0.670, p value for subgroup A5B5 is 0.670, p values for subgroup A6B6 0.856. Disinfection with 4% chlorhexidine solution exhibited mixed pattern of bond failure while sodium perborate monohydrate solution demonstrated both mixed and adhesive type of bond failure. Mechanical disinfection and Combination of mechanical and chemical disinfection exhibited adhesive type of failure. Interpretation and Conclusion: Disinfection with 4% chlorhexidine, sodium perborate monohydrate, brushing and combination of mechanical and chemical disinfection reduced the bond strength between denture teeth and heat activated denture base.
IP Annals of prosthodontics and restorative dentistry, Mar 15, 2024
Artificial intelligence (AI) is an evolving and assuring approach in healthcare and has begun to ... more Artificial intelligence (AI) is an evolving and assuring approach in healthcare and has begun to improve the dental science ever since. A subgroup of AI called deep learning (DL) related convolutional neural network algorithm have showed significant applications in computer based tasks and have been shown to be fairly applicable for dental image recognition and treatment planning analysis. This article aims to review the adaptation of artificial intelligence in identifying implant systems and abutments using deep learning concept. This is an Open Access (OA) journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
Amelogenesis imperfecta is a hereditary disorder displaying a group of conditions which cause dev... more Amelogenesis imperfecta is a hereditary disorder displaying a group of conditions which cause developmental alterations in the structure of enamel. The adverse effects it has on the oral health and quality of life of the individual warrants the identification of the contributing factors for the excessive wear and loss of vertical dimension. Extensive restorative treatment is imperative for the correction of such severely worn out dentition. Rehabilitation in such patients improves aesthetics, function and comfort. This case report presents a systematic approach in rehabilitating a case of hypomaturation type Amelogenesis Imperfecta (AI) following Hobo twin stage philosophy.
International Journal of Dental Materials, Dec 31, 2022
The horizon of implant dentistry has been ever-expanding owing to its longterm success in rehabil... more The horizon of implant dentistry has been ever-expanding owing to its longterm success in rehabilitating partially or completely edentulous cases. This perennial success and efficiency have encouraged clinicians to use osseointegrated implants to replace teeth lost in children either due to trauma or congenital absence. Although a myriad of studies and publications suggest the placement of implants only after the attainment of skeletal maturity, as the growth-related changes such as remodelling, displacement, and mesial drift can put the future of implant and restoration in jeopardy, the use of implants in young pubescent or adolescent looks promising due to its evident psychological and social advantages over other contemporary alternatives such as a removable prosthesis or resin-bonded bridge. The first case report highlights a 16-year follow-up of a young girl treated at the age of 10 with an implant-supported prosthesis for the replacement of a missing maxillary left central incisor. The second case report centers around a 19-year-old teenage girl who underwent rehabilitation with a permanent fixed prosthesis, replacing her previous implant-supported temporary prosthesis. The implant was initially placed when she was 10 years old.
The use of last few remaining teeth in a ravaged dentition to improve the stability and retention... more The use of last few remaining teeth in a ravaged dentition to improve the stability and retention of prosthesis is an age old concept. Retention is improved greatly by use of attachments, but many are deprived of overdenture treatment because of financial constraints. This article describes a novel method of fabricating a quinvilivan overdenture attachment by use of a metal press button. This acts as the male component and orthodontic separators are used as the female component. This technique provides a reasonable amount of retention in a cost effective and simple way. INTRODUCTION Over the past few years number of edentulous patients among the general population has risen steeply.Even though rehabilitation of edentulous ridge with implant spersists, it is an expensive treatment not afforded by many. Preventive prosthodontics including over dentures comes into play to meet the increasing demands of thee dentulous patients under these circumstances. Over denture is a favored treatme...
IP Annals of Prosthodontics and Restorative Dentistry
To present clinical strategies for prosthetic rehabilitation of completely edentulous patients us... more To present clinical strategies for prosthetic rehabilitation of completely edentulous patients using immediate-loading basal implants. A 58-year-old female patient was referred to the Department of Prosthodontics for restoration of her completely edentulous maxilla and mandible with a fixed full-arch implant-prosthetic rehabilitation. Since the patient lacks adequate bone in the posterior maxilla and is not willing to undergo a removable interim prosthesis, an immediate loading protocol along with 8 single-piece basal implants, including 2 pterygoid implants in the maxillary arch and 6 single-piece basal implants in the mandibular arch, was selected as the treatment option, followed by an acrylic provisional restoration. Four months later, a definitive fixed implant-supported prosthesis was delivered. This treatment strategy may be considered for rehabilitating patients with atrophic ridges demanding fixed provisional prostheses throughout the healing period and can be employed even...
Introduction: This study aims to evaluate the surface wettability of addition silicone impression... more Introduction: This study aims to evaluate the surface wettability of addition silicone impression materials, which were treated with two different disinfecting agents for two different time intervals. Methods: Twenty-five rectangle-shaped specimens from each of two different addition silicone impression materials (Express GT and Flexceed) were prepared. Five samples from each impression material were kept as the control without any disinfection. The rest of the specimens were divided into two groups according to the disinfecting agents, (2% Glutaraldehyde and 0.5% sodium hypochlorite) and disinfected for two time periods (10 minutes, and 60 minutes). Later, surface wettability was tested and recorded. Data were analyzed with analysis of variance (ANOVA). Results: The mean contact angle values of both impression materials at 10 minutes of disinfection were reduced when compared to the control group (without disinfection). As the disinfection time increases there was a tendency of dec...
The purpose of the present study was to evaluate the biocompatibility and osteoconductive potenti... more The purpose of the present study was to evaluate the biocompatibility and osteoconductive potential of pure and pigment forms of titanium dioxide. Pure and pigment forms of titanium dioxide were incorporated into prepared bur holes in the femur bone of rabbits. Implantation was done on six Albino rabbits which were sacrificed at the end of 3rd, 4th and 5th months after implantation. Radiographic, histologic and scanning electron microscopic evaluations of the implanted sites were performed. Heamatologic and soft tissue response to these materials were also evaluated. The results showed that both pure and pigment forms of titanium dioxide are biocompatible and have good osteoconductive properties. It was concluded that titanium dioxide can be effectively used in the augmentation of osseous defects and inadequate ridge forms.
Modern dentistry changed tremendously with implant surgery.For a successful implant therapy a pro... more Modern dentistry changed tremendously with implant surgery.For a successful implant therapy a proper diagnosis and treatment plans is required. Teeth loss may be due to physiological as well as pathological factors are common. The complete loss of teeth causes various problems like difficulty in mastication, improper phonetics, and unacceptable esthetics of patients.Implant supported prosthesis give the dentist an opportunity to restore normal function and esthetics.Successful osseointegration enables dentist and patient to accept a full arch dental prosthesis.
Aim: To systematically review the reported techniques, for evaluating the risk and difficulty enc... more Aim: To systematically review the reported techniques, for evaluating the risk and difficulty encountered in the management of fractured abutment screw in accordance with the location of fracture, and to develop a logical sequence in managing an implant abutment screw fracture. Settings and Design: Systematic review following PRISMA guidelines. Materials and Methods: A systematic search of the PubMed/MEDLINE database for articles published between January 2000 and March 2020 was performed by 2 independent reviewers. Case reports and case series that described the management of fractured implant abutment screw were included. Published articles were qualitatively analyzed employing CARE guidelines and were classified according to the location of screw fracture with respect to implant platform, risk of damage to the implant, and intervention for managing the fractured screw. Statistical Analysis Used: Qualitative analyisis. Results: A total of 28 articles were included in the review. Two of them explained the management of screw fracture at or above the implant platform and required only mild approach with low risk while the others explained the management of screw fracture below the level of implant platform. Among them, 6 were considered mild approach with low risk, 13 moderate approach with moderate risk, and 8 of them severe approach with high risk. Conclusion: Irrespective of the technique, any attempt to retrieve abutment screw fragment poses some risk to the implant which is varying from mild to severe. As the location of fracture is more gingival to the implant platform, difficulty of retrieval as well as risk to the implant increases. The proposed decisionmaking tree will be a useful tool in helping clinicians to manage abutment screw fracture.
International journal of scientific research, 2020
The emergence of stem cell therapy has given a great fill up for the future of tissue regenerativ... more The emergence of stem cell therapy has given a great fill up for the future of tissue regenerative medicine. Dental stem cells have great potential because of its accessibility, plasticity and proliferative ability. Various studies have shown that stem cells are primarily found in 'niches' and dental tissues are a rich source of mesenchymal stem cells that are useful for tissue engineering application. Several types of dental stem cells have been identified including those from human dental pulp, primary exfoliated deciduous teeth, periodontal ligament, third molar follicles etc. Many studies are still in nascent stages but it is imperative that stem cells and tissue engineering will give rise to a separate branch of regenerative dentistry which will leave an indelible print in future of dental practice.
The Mac Boyle retainer should be employed only under the most favourable conditions and when work... more The Mac Boyle retainer should be employed only under the most favourable conditions and when workmanship is of the highest order. When a Mac Boyle retainer is constructed by one who understands its limitations and does not exceed its potentialities, the prosthesis will have a surprisingly long life. When its use can be justified, minimal tooth surface is covered by metal. It is akin to the partial veneer crown, but the preparation is not so deep and the retention is derived from grooves at the labial line angles instead of on the proximal surfaces.
International Journal of Oral Health Dentistry, 2020
The loss of an eye is an emotional and psychological setback to the patient. An ocular prosthesis... more The loss of an eye is an emotional and psychological setback to the patient. An ocular prosthesis is given to uplift the patient psychologically and to boost up patient's self esteem and their social acceptance in the society. To improve the comfort and matching of the prosthesis with that of the adjacent natural eye a custom made ocular prosthesis is preferred. Ocular prosthesis can be given as stock eye shell or by fabrication of custom-made eye prosthesis by sclera painting. Advantages of custom-made eye prosthesis are well established over stock eye shell so, this article presents a case report of a patient-wearing stock eye shell with poor esthetics, and the same was replaced with custom-made eye prosthesis.
International Journal of Applied Dental Sciences, 2021
Physiologic rest position of the mandible is an important parameter to be considered in the fabri... more Physiologic rest position of the mandible is an important parameter to be considered in the fabrication of a complete denture as well as in a case of full mouth rehabilitation. Violation of the rest position would lead to detrimental effects on the facial musculature and the temporomandibular joint. This article reviews the various concepts pertaining to the rest position of mandible and its clinical implication.
The facial region defects caused by trauma, accident, tumour or congenital defects are treated wi... more The facial region defects caused by trauma, accident, tumour or congenital defects are treated with maxillofacial prostheses. A part from esthetics, the most common problem encountered with these prostheses is the retention of prostheses. Recent techniques along with newer materials, treatment options, and its application are described. The success of maxillofacial prostheses in meeting the expectations of patients and prosthodontists is on rise with the development of adhesive material science, the emergence of technical knowledge, and the development of implant technology. Increase in retention provides ease of use and psychological acceptance by the patient thereby improving the long-term prognosis of the prosthesis. In the present article review, the methods used for the retention of prostheses from past to present along with the advantages of adhesives and implants, implementation of 3D technology and rapid prototyping were critically appraised.
IP Annals of Prosthodontics and Restorative Dentistry
The first Covid case in India was reported in Kerala. Kerala’s attempt to contain Covid 19 in the... more The first Covid case in India was reported in Kerala. Kerala’s attempt to contain Covid 19 in the initial period was praised nationally and internationally. This study is a humble attempt to study the impacts of the pandemic outbreak on academic activities, clinical training, and occupational expectations of prosthodontics postgraduate students in Kerala during the period of October 2020 to December 2020. A set of 20 close-ended questions were formulated. The questionnaire was circulated online using google forms among the postgraduate students pursuing prosthodontics in dental colleges in Kerala. Prosthodontic Postgraduate students of dental colleges in Kerala who were willing to participate in the study and gave informed consent were included in the study. Even though Prosthodontic postgraduate students appeared comfortable with technology adaptations for a didactic curriculum, internet connectivity issues were a major hindrance to the smooth conduction of online academic activiti...
Background: Different pattern materials do not produce copings with satisfactory, marginal accura... more Background: Different pattern materials do not produce copings with satisfactory, marginal accuracy when used on stone dies at varying time intervals. Purpose: The purpose of this study was to evaluate and compare the vertical marginal accuracy of patterns formed from three materials, namely, thermoplastic resin, light cured wax and inlay casting wax at three-time intervals of 1, 12, and 24 h. Methodology: A master die (zirconia abutment mimicking a prepared permanent maxillary central incisor) and metal sleeve (direct metal laser sintering crown #11) were fabricated. A total of 30 stone dies were obtained from the master die. Ten patterns were made each from the three materials and stored off the die at room temperature. The vertical marginal gaps were measured using digital microscope at 1, 12, and 24 h after reseating with gentle finger pressure. Results: The results revealed a significant statistical difference in the marginal adaptation of three materials at all the three-time intervals. Light cured wax was found to be most accurate at all time intervals, followed by thermoplastic resin and inlay casting wax. Furthermore, there was a significant difference between all pairs of materials. The change in vertical marginal gap from 1 to 24 h between thermoplastic resin and light cured wax was not statistically significant. Conclusion: The marginal adaptation of all the three materials used, was well within the acceptable range of 25-70 µm. The resin pattern materials studied revealed significantly less dimensional change than inlay casting wax on storage at 1, 12, and 24 h time intervals. They may be employed in situations where high precision and delayed investing is expected.
Background and Objectives: Acrylic resin had a long history of been used in the fabrication of de... more Background and Objectives: Acrylic resin had a long history of been used in the fabrication of denture fabrication since they exhibit a better chemical bond between teeth and denture base. With increasing use of dentures, detachment of teeth from dentures also increased proportionally. Denture disinfection is an essential procedure for maintaining good hygiene of the denture. The aim of the study is to evaluate the effect of disinfection on shear bond strength between denture teeth and heat activated denture base. Objectives 1. To evaluate the shear bond strength between heat activated acrylic resin denture base and denture teeth measured using a universal testing machine (Instron) expressed in MPa. 2. To analyse the bonding failure between the denture tooth and heat activated acrylic resin interface using a stereomicroscope at 25 X magnification. Methodology: Two commercial brands of denture teeth (Acryrock and Ivostar) and heat activated acrylic resin denture base were tested. There were 12 subgroups in the study. Each brand of denture teeth was divided into six subgroups comprising of five experimental subgroups and one control group. In subgroup A1B1 and A2B2 (chemical disinfection) the specimens were immersed in 4% of chlorhexidine and sodium perborate monohydrate solution for 15 minutes daily for 19 days respectively, Subgroup A3B3 specimens (mechanical disinfection) were subjected to mechanical disinfection for 14 hours and in Subgroup A4B4 and A5B5 specimens were subjected to mechanical disinfection for 14 hours followed by disinfection with 4% chlorhexidine solution and sodium perborate monohydrate solution for 15 minutes daily for 19 days respectively. In Control group A6B6 specimens were immersed in distilled water at 37degree Celsius for 19 days. Shear bond strength testing was performed at denture tooth resin interface in a universal testing machine at a cross head speed of 1mm/minute. Bond strength failure rates were quantified and classified as adhesive, cohesive or mixed. Data were analyzed by independent t test and chi-square test. Results: In subgroupA1B1 and subgroupA2B2, (chemical disinfection) the specimens immersed in 4% of chlorhexidine (p=0.615) and sodium perborate monohydrate (p=0.615), for 19 days respectively, subgroup A3B3 (mechanical disinfection) specimens were subjected to mechanical disinfection for 14 hours (p<0.01), subgroup A4B4 and A5B5 (mechanical-chemical disinfection) (p<0.01) and (p<0.01) respectively, subgroup A6B6 (control group) (p=0.054). For bond failure analysis where p value for subgroup A1B1 is 0.856, p value for subgroup A2B2 is 1.000, P value for subgroup A3B3 is 1.000, p value for subgroup A4B4 is 0.670, p value for subgroup A5B5 is 0.670, p values for subgroup A6B6 0.856. Disinfection with 4% chlorhexidine solution exhibited mixed pattern of bond failure while sodium perborate monohydrate solution demonstrated both mixed and adhesive type of bond failure. Mechanical disinfection and Combination of mechanical and chemical disinfection exhibited adhesive type of failure. Interpretation and Conclusion: Disinfection with 4% chlorhexidine, sodium perborate monohydrate, brushing and combination of mechanical and chemical disinfection reduced the bond strength between denture teeth and heat activated denture base.
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