Papers by Dr Ivy Coutinho
The Journal of Prosthetic Dentistry, 2003
Most endodontically treated teeth require a post-and-core build-up for restoring the teeth to opt... more Most endodontically treated teeth require a post-and-core build-up for restoring the teeth to optimum health and function. Selection of an appropriate post-and-core system from the wide variety of those available may be a clinical dilemma. Therefore, the purpose of this article is to review the literature to identify the various factors that influence the selection of the post-and-core assembly. English-language peer-reviewed articles between 1961 and 2002 were identified using MEDLINE, as well as a hand search. The following key words were used: post, design, retention, fracture resistance, survivability, and esthetics. Selection of a post and core system should satisfy many interrelated biologic, mechanical, and esthetic factors to optimally restore the endodontically treated tooth to adequate form and function. This review may serve as a guide to aid the clinician in the selection of a post-and-core system.
The Journal of Indian Prosthodontic Society, 2018
External maxillofacial prosthesis, restore anatomically, functionally, and cosmetically the regio... more External maxillofacial prosthesis, restore anatomically, functionally, and cosmetically the regions of the maxilla, mandible, or face, which are missing or altered by disease, accident, or congenitally malformed. [1] Silicone materials have become the materials of choice for the fabrication of facial prostheses. [2] Two major drawbacks associated with maxillofacial silicones are the degradation of physical properties and discoloration of the prostheses in a service environment. [2-5] The wearing time for facial prostheses averages only from 3 months to 1 year, as they undergo major alterations in Purpose: The purpose of this study was to assess and compare the effect of the simulated Indian and Mediterranean climates on the Shore A hardness of a commercially available nonpigmented room temperature vulcanizing maxillofacial silicone. Materials and Methods: Sixty specimens were fabricated from A-2000 silicone material (Factor II), using a stainless steel mold of dimension 20 mm × 2 mm. The initial Shore A hardness was noted using a digital durometer. Thirty samples were subjected to the simulated Mediterranean climate (Group I), and the remaining thirty samples were subjected to the Indian tropical climate (Group II) in an accelerated weather chamber to simulate 1 year of clinical use. Final Shore A hardness was noted. A one-way ANOVA and Bonferroni post hoc tests were performed for the Shore A hardness at P < 0.05. Results: The mean initial Shore A hardness for both the groups was 24.9833. After accelerated weathering, Group I showed mean Shore A hardness of 33.0000 whereas Group II showed mean Shore A hardness of 38.0000. Conclusions: The Shore A hardness of Factor II, before and after accelerated artificial weathering, was statistically significant at 0.05 level (P < 0.05).The change in Shore A hardness was greater in the simulated tropical climate group (Group II) as compared to the simulated Mediterranean climate group (Group I) but within clinical limits.
The Journal of Indian Prosthodontic Society, 2016
In complete denture prosthodontics, the final impression stage plays a pivotal role in the succes... more In complete denture prosthodontics, the final impression stage plays a pivotal role in the success of a complete denture. The final impression procedure for a complete denture entails capturing the vestibule through border molding procedure and then making an impression of the edentulous arch. [1] Border molding a custom tray to adapt it closely to the tissues of the vestibule before making the final impression is a time-honored procedure in complete denture prosthodontics. The original material used for border molding was low fusing impression Purpose: The aim of this in vivo study was to compare the single-step border molding technique using injectable heavy viscosity addition silicone with sectional border molding technique using low fusing impression compound by evaluating the retention of heat cure trial denture bases. Materials and Methods: Ten completely edentulous patients in need of prostheses were included in this study. Two border molding techniques, single-step (Group 1) and sectional (Group 2), were compared for retention. Both border molding techniques were performed in each patient. In both techniques, definitive wash impression was made with light viscosity addition silicone. The final results were analyzed using paired t-test to determine whether significant differences existed between the groups. Results: The t-value (3.031) infers that there was a significant difference between Group 1 and Group 2 (P = 0.014). The retention obtained in Group 2 (mean = 9.05 kgf) was significantly higher than that of Group 1 (mean = 8.26 kgf). Conclusion: Sectional border molding technique proved to be more retentive as compared to single-step border molding although clinically the retention appeared comparable.
Clinical case reports international, Jun 18, 2020
Loss of an eye can be caused by cancer, trauma, or congenital defects. The rehabilitation of an o... more Loss of an eye can be caused by cancer, trauma, or congenital defects. The rehabilitation of an ocular defect done by a custom ocular prosthesis provides a better fit, is more comfortable to use and it also gives better cosmetic results compared to a stock eye prosthesis. The main objective of this article is to describe a technique for fabricating a hollow ocular prosthesis with the help of a soap spacer.
Book Publisher International (a part of SCIENCEDOMAIN International), Aug 9, 2021
Loss of an eye can be caused by cancer, trauma, or congenital defects. The rehabilitation of an o... more Loss of an eye can be caused by cancer, trauma, or congenital defects. The rehabilitation of an ocular defect can be done by using a stock prosthesis or by customising a prosthesis for the patient. A prosthesis fabricated by customisation offers more advantages than a stock prosthesis. A custom ocular prosthesis is fabricated by taking an impression of the socket and the tissue bed and allows better contouring of the prosthesis. Hence a custom prosthesis provides a better fit by positive adaptation to the tissue bed, is more comfortable to use and it also gives better cosmetic results compared to a stock eye prosthesis. Hollowing out the prosthesis further increases the patients comfort and adaptability. The main objective of this chapter is to describe a technique for fabricating a hollow ocular prosthesis with the help of a soap spacer.
The Journal of Indian Prosthodontic Society, Aug 20, 2013
Loss of an eye can cause a significant psychological and emotional disturbance to any patient. An... more Loss of an eye can cause a significant psychological and emotional disturbance to any patient. An ocular prosthesis helps to re-establish the physical and mental well-being of the patient. This article describes a novel technique along with a case report for fabricating a predictable, esthetic and well-fitting custom-made ocular prosthesis in an attempt to avoid costly and time consuming procedures that may be required in other methods.
IOP Publishing eBooks, Dec 1, 2021
Dentistry, 2018
neutral zone following the index. Final try-in procedure was carried out. At the try-in stage, ti... more neutral zone following the index. Final try-in procedure was carried out. At the try-in stage, tissue conditioning material and green food color (Flying Bird, Artificial Food color, Green) was used to record a palatogram (Figure 3). It helps to record palatal contours during
Journal of Prosthodontics, Jan 25, 2017
Prosthetic rehabilitation of a completely edentulous patient should never be restricted to the re... more Prosthetic rehabilitation of a completely edentulous patient should never be restricted to the replacement of missing teeth. The ultimate aim of complete denture treatment should be restoration of the full range of oral functions and esthetics. Slumped cheeks are always a concern for esthetically demanding complete denture patients. This article describes a simple, scientific, cost-effective technique to improve facial esthetics in a completely edentulous patient with the help of a cheek plumper. The technique used here implements the concept of neutral zone to precisely determine the amount of space available for the cheek plumper. The simple friction lock attachments that retained the cheek plumpers on the prosthesis were also fabricated after determining the space available in the appropriate areas. Thus an effort was made to keep the cheek plumpers unobtrusive yet effective to ensure complete integration of the prosthesis into the stomatognathic system.
The Journal of Indian Prosthodontic Society
Aim: Esthetics of the provisional restorations is of prime importance to the patients especially ... more Aim: Esthetics of the provisional restorations is of prime importance to the patients especially in long term in the esthetic zone. Discolouration of these restorations may result in patient dissatisfaction and an additional expense for their replacement. LuxaCrown provisional material being new in market and claimed to be semi-permanent by the company needs to be evaluated for its colour stability. This in vitro study was aimed to evaluate and compare the colour stability of three provisional restorations using three pigmented solutions. Setting and Design: In vitro - comparative study. Materials and Methods: LuxaCrown, Protemp4, Heat cure PMMA were evaluated. 40 specimens of each material were divided into four groups of ten specimens each. Each group was stored in three staining solutions and artificial saliva. Colour values of each specimen were measured before immersion, after one day, one week, one month, three months and six months with a spectrophotometer. Stastistical Analysis Used: One way ANOVA, Post Hoc Tukey Test, Bonferonni Test. Results: Least colour change was seen in Heat Cure PMMA followed by Protemp4 and highest colour change was seen in LuxaCrown when immersed in artificial saliva, tea and coffee. Whereas in turmeric, Heat Cure PMMA showed the least colour change followed by LuxaCrown and highest colour change was seen in Protemp4 at all time intervals except day one, where LuxaCrown was higher than Protemp4. Conclusion: Heat cure showed the best results as compared to Protemp4 and LuxaCrown in terms of colour stability at all time periods.
Nanotechnology for Dentistry Applications, 2021
New Frontiers in Medicine and Medical Research Vol. 3, 2021
Loss of an eye can be caused by cancer, trauma, or congenital defects. The rehabilitation of an o... more Loss of an eye can be caused by cancer, trauma, or congenital defects. The rehabilitation of an ocular defect can be done by using a stock prosthesis or by customising a prosthesis for the patient. A prosthesis fabricated by customisation offers more advantages than a stock prosthesis. A custom ocular prosthesis is fabricated by taking an impression of the socket and the tissue bed and allows better contouring of the prosthesis. Hence a custom prosthesis provides a better fit by positive adaptation to the tissue bed, is more comfortable to use and it also gives better cosmetic results compared to a stock eye prosthesis. Hollowing out the prosthesis further increases the patients comfort and adaptability. The main objective of this chapter is to describe a technique for fabricating a hollow ocular prosthesis with the help of a soap spacer.
Recent Developments in Medicine and Medical Research Vol. 7, 2021
The Journal of Indian Prosthodontic Society, 2018
External maxillofacial prosthesis, restore anatomically, functionally, and cosmetically the regio... more External maxillofacial prosthesis, restore anatomically, functionally, and cosmetically the regions of the maxilla, mandible, or face, which are missing or altered by disease, accident, or congenitally malformed. [1] Silicone materials have become the materials of choice for the fabrication of facial prostheses. [2] Two major drawbacks associated with maxillofacial silicones are the degradation of physical properties and discoloration of the prostheses in a service environment. [2-5] The wearing time for facial prostheses averages only from 3 months to 1 year, as they undergo major alterations in Purpose: The purpose of this study was to assess and compare the effect of the simulated Indian and Mediterranean climates on the Shore A hardness of a commercially available nonpigmented room temperature vulcanizing maxillofacial silicone. Materials and Methods: Sixty specimens were fabricated from A-2000 silicone material (Factor II), using a stainless steel mold of dimension 20 mm × 2 mm. The initial Shore A hardness was noted using a digital durometer. Thirty samples were subjected to the simulated Mediterranean climate (Group I), and the remaining thirty samples were subjected to the Indian tropical climate (Group II) in an accelerated weather chamber to simulate 1 year of clinical use. Final Shore A hardness was noted. A one-way ANOVA and Bonferroni post hoc tests were performed for the Shore A hardness at P < 0.05. Results: The mean initial Shore A hardness for both the groups was 24.9833. After accelerated weathering, Group I showed mean Shore A hardness of 33.0000 whereas Group II showed mean Shore A hardness of 38.0000. Conclusions: The Shore A hardness of Factor II, before and after accelerated artificial weathering, was statistically significant at 0.05 level (P < 0.05).The change in Shore A hardness was greater in the simulated tropical climate group (Group II) as compared to the simulated Mediterranean climate group (Group I) but within clinical limits.
International Journal of Oral Health Dentistry, 2020
Eating disorders (EDs) are psychosocial conditions having a significant impact on the patient's g... more Eating disorders (EDs) are psychosocial conditions having a significant impact on the patient's general and oral health status. Since dentists are usually the first health professionals to encounter patients with EDs, it is important to be aware of the characteristic presentations of these disorders. This narrative review aims to provide a knowledge base for restoring dentists about three main eating disorders-Anorexia nervosa, Bulimia nervosa and Binge Eating Disorders, their systemic and oral manifestations, protocol for preventive care and comprehensive treatment plan. Literature search was conducted in electronic databases and 60 articles were selected for the review. Considerable emphasis is placed on diagnosis and management of such disorders. These patients pose a challenging situation to the dental fraternity, since most restoring dentists are unaware of the fundamental importance of their role in the multidisciplinary treatment and due to lack of training regarding strategies involved in their dental treatment.
Journal of Research in Dentistry, 2018
Objectives: The objective of this paper is to review the available literature on the novelties an... more Objectives: The objective of this paper is to review the available literature on the novelties and applications of nanomaterials in Prosthodontics. Data and Sources: 125 articles were retrieved which included reviews and studies on various nanomaterials used in Dentistry especially Prosthodontics after Gray literature search, cross references and electronic database search in PubMed, MedLine and Google search using the following key words-Nanomaterials, Nanotechnology, Prosthodontics, Dentistry, Applications Study selection: 74 articles were selected and reviewed as they met the selection criteria. Conclusion: Within the scope of this review, reported literature showed that the emerging science of nanotechnology in Dentistry especially in the field of Prosthodontics has triggered growing interest in the potential applications and benefits compared to the conventional materials in use. The latest research progress on the applications of nanomaterials used in Prosthodontics was reviewed with detailed description, keeping in mind the limitations like challenges faced and the health implications.
Journal of Research in Dentistry, 2016
Aim: The present paper aims to review the literature available on various approaches to salivary ... more Aim: The present paper aims to review the literature available on various approaches to salivary reservoir designs, the functional aspects, cleansibility, type of attachments used, and different techniques used for the fabrication of salivary reservoirs in patients suffering from xerostomia.Material and Methods: A search in the National Library of Medicine’s Pub Med database, Google search and Science Direct was performed to include all case reports and reviews on prosthodontic rehabilitation of dentulous/partially edentulous/edentulous patient with xerostomia.Results: Out of the 35 articles found in the database search, 18 articles were included based on the designs they adopted for fabrication of salivary reservoirs.Conclusions: The various designs available in literature enable an operator to choose the most suitable reservoir design based on specific patient requirements. Innovations in reservoir design promise a more customized prosthesis for every patient. Further research and...
The Journal of Indian Prosthodontic Society, 2016
In complete denture prosthodontics, the final impression stage plays a pivotal role in the succes... more In complete denture prosthodontics, the final impression stage plays a pivotal role in the success of a complete denture. The final impression procedure for a complete denture entails capturing the vestibule through border molding procedure and then making an impression of the edentulous arch. [1] Border molding a custom tray to adapt it closely to the tissues of the vestibule before making the final impression is a time-honored procedure in complete denture prosthodontics. The original material used for border molding was low fusing impression Purpose: The aim of this in vivo study was to compare the single-step border molding technique using injectable heavy viscosity addition silicone with sectional border molding technique using low fusing impression compound by evaluating the retention of heat cure trial denture bases. Materials and Methods: Ten completely edentulous patients in need of prostheses were included in this study. Two border molding techniques, single-step (Group 1) and sectional (Group 2), were compared for retention. Both border molding techniques were performed in each patient. In both techniques, definitive wash impression was made with light viscosity addition silicone. The final results were analyzed using paired t-test to determine whether significant differences existed between the groups. Results: The t-value (3.031) infers that there was a significant difference between Group 1 and Group 2 (P = 0.014). The retention obtained in Group 2 (mean = 9.05 kgf) was significantly higher than that of Group 1 (mean = 8.26 kgf). Conclusion: Sectional border molding technique proved to be more retentive as compared to single-step border molding although clinically the retention appeared comparable.
The Journal of Indian Prosthodontic Society, 2013
Loss of an eye can cause a significant psychological and emotional disturbance to any patient. An... more Loss of an eye can cause a significant psychological and emotional disturbance to any patient. An ocular prosthesis helps to re-establish the physical and mental well-being of the patient. This article describes a novel technique along with a case report for fabricating a predictable, esthetic and well-fitting custom-made ocular prosthesis in an attempt to avoid costly and time consuming procedures that may be required in other methods.
Journal of prosthodontics : official journal of the American College of Prosthodontists, Jan 25, 2017
Prosthetic rehabilitation of a completely edentulous patient should never be restricted to the re... more Prosthetic rehabilitation of a completely edentulous patient should never be restricted to the replacement of missing teeth. The ultimate aim of complete denture treatment should be restoration of the full range of oral functions and esthetics. Slumped cheeks are always a concern for esthetically demanding complete denture patients. This article describes a simple, scientific, cost-effective technique to improve facial esthetics in a completely edentulous patient with the help of a cheek plumper. The technique used here implements the concept of neutral zone to precisely determine the amount of space available for the cheek plumper. The simple friction lock attachments that retained the cheek plumpers on the prosthesis were also fabricated after determining the space available in the appropriate areas. Thus an effort was made to keep the cheek plumpers unobtrusive yet effective to ensure complete integration of the prosthesis into the stomatognathic system.
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Papers by Dr Ivy Coutinho