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   2016| January-March  | Volume 16 | Issue 1  
    Online since February 4, 2016

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Concepts of occlusion in prosthodontics: A literature review, part II
V Rangarajan, PB Yogesh, B Gajapathi, M Mohamed Ibrahim, R Ganesh Kumar, Murali Karthik
January-March 2016, 16(1):8-14
DOI:10.4103/0972-4052.164915  PMID:27134421
This series of articles describes about concepts of occlusion in the complete denture, fixed partial denture, and implants. This article discusses about the evolution of different concepts of nonbalanced occlusion and occlusal schemes in complete denture occlusion.
  18,555 3,512 -
Lateral throat form re-classified using a customized gauge: A clinical study
N Kalavathy, P Roshan Kumar, Shefali Gupta, J Sridevi, Mitha Shetty, Archana K Sanketh
January-March 2016, 16(1):20-25
DOI:10.4103/0972-4052.167934  PMID:27134423
Background: A common problem faced by prosthodontists is achieving adequate retention and stability in the mandibular dentures. Recording the lateral throat form (LTF) correctly can aid in the retention and stability. Till date, Neil's classification has been considered as the gold standard in measuring the depth of the LTF. This is a subjective classification and varies among different operators. In this study, a customized tool was used to measure the depth of the LTF, and a classification was proposed according to the measured depths. Objectives: The objective of this study is to measure the exact depth of LTF using customized gauge and to propose a classification based on the measured depth. Materials and Methods: A customized gauge was made to measure the depth of the LTF. Two different observers classified the LTFs according to Neil's classification and according to the proposed classification in a total group of 50 patients. The customized gauge was inserted into the alveolo-lingual sulcus to measure the depth. The Pearson's correlation statistics was carried out to observe the inter-observer relationships of sulcus depth using this customized gauge. ANOVA test was used to compare the mean depth of the sulcus as measured by observers 1 and 2. Results: There was more inter-observer variability when Neil's classification was used as compared to the one with the proposed classification using the gauge. The inter-observer agreement for the proposed new classification was assessed by Cohen's kappa value, with P < 0.001. The mean depth of the sulcus as calculated by observers 1 and 2 was compared with ANOVA test and found to be significant with P < 0.001. Conclusion: The proposed new classification for LTF gave consistent results and was easier to use with less variability when compared to the Neil's classification.
  9,553 660 -
Outcome of single maxillary complete dentures opposing mandibular teeth: A need to introspect on the prosthodontic treatment protocol
Sudhir Bhandari
January-March 2016, 16(1):15-19
DOI:10.4103/0972-4052.167941  PMID:27134422
Introduction: In the era of implant supported restorations, conventional complete denture (CD) for isolated edentulous maxilla still remains the first choice of treatment despite being its frequent mechanical failures. Statement of Problem: Edentulous maxillary arch restored with polymethyl methacrylate (PMMA) based CDs when opposed by natural and/or restored dentition is biomechanically and functionally a compromised rehabilitation. Materials and Methods: Seven patients (4 males, 3 females) in the age range of 55–75 years were treated for their frequent fracture of the single maxillary denture. They were asked to rate their prosthodontic experience on a scale of 1–10. They were further inquired about the awareness of their clinical condition and knowledge on the alternative treatment options available to them, number of different dentists they have been treated by and frequency of their re-visits to the dental office after being edentulous. Results: Removable PMMA based CD in maxilla was the first choice of treatment for all the restorative dentists who treated these patients. No attempt was ever made to treat the opposing dentition in any of the seven patients. Despite being under regular prosthodontic care for fabrication and repairs by as many as 23 dentists, none of the patients was aware of their clinical situation and the alternative treatment options available. Conclusion: It is imperative that the restorative dentist be aware of the perils of such inter-arch relationships. Appropriate treatment done on time may avert a situation where the oral conditions become incompatible for the longevity of treatment done even with the aid of dental implants.
  5,471 606 -
Rehabilitation of long-span Kennedy class IV partially edentulous patient with a custom attachment-retained prosthesis
Pavithra Kumar Shetty, Bharath Y Shetty, Mayur Hegde, Bharath M Prabhu
January-March 2016, 16(1):83-86
DOI:10.4103/0972-4052.155045  PMID:27134433
The rehabilitation of a patient in the Kennedy class IV situation demands biomechanical balance and aesthetic improvement. The long-span condition complicates the problem because of the unavailability of sufficient number of abutments to support the prosthesis. Conventional removable prosthesis and fixed partial denture are not advised for the same reason. This report describes a novel technique for the fabrication of a custom attachment to retain prosthesis. An acrylic resin removable partial denture (RPD) is retained by a custom attachment. The patrix part of the custom attachment is fabricated using molar bands, prefabricated circumferential clasp, and straight die pins. The matrix part of the attachment is constituted by the plastic sleeves of the straight die pins, which are embedded inside the tissue-fitting surface of the prosthesis. This article describes an inexpensive custom attachment for rehabilitating the long-span Kennedy class IV situation. The entire technique is reversible, inexpensive, and demands less skill compared to semi-precision and precision attachments.
  4,944 590 -
Single implant supported mandibular overdenture: A literature review
Sudhindra Mahoorkar, Srinidhi Bhat, Radhika Kant
January-March 2016, 16(1):75-82
DOI:10.4103/0972-4052.164881  PMID:27134432
Purpose: Rehabilitation of the edentulous mandible by implant-supported prosthesis is a successful and satisfying treatment as suggested by many clinical trials. However, the minimum number of implants required for this restoration is debatable. Single implant retained overdenture (SIROD) has gained popularity as a simple protocol. The purpose of this review is to systematically analyze the literature on SIROD. Materials and Methods: An electronic search was done in the PubMed and Medline databases using the key words “central single implant overdenture,” “implant overdenture retained by one implant,” “implant overdenture retained by single implant,” “mandibular single implant overdenture,” “mandibular SIRODs.” Articles from 1993 to November 2012 were included in the review. Out of 208 articles, only 18 had relevant data pertaining to mandibular single implant overdenture. Two more were hand-picked from journals that are non-PubMed indexed but from reputed publishing houses. Results: Majority of studies supported the concept of SIROD. Success outcome was addressed in relation to surgical, prosthetic, functional parameters, and patient satisfaction. 65% studies evaluated the primary stabilities of the placed implants, 50% of studies assessed the marginal bone loss quarterly across a 1-year period. Prosthesis outcome was a criterion for evaluation of success rate in 45% of studies. Conclusion: The SIROD is proved to be successful and an economic treatment protocol. However, the clinical parameters such as masticatory efficiency bite force, retention, and stability needs to be investigated.
  4,689 701 -
Comparative evaluation of marginal leakage of provisional crowns cemented with different temporary luting cements: In vitro study
Sheen Juneja Arora, Aman Arora, Viram Upadhyaya, Shilpi Jain
January-March 2016, 16(1):42-48
DOI:10.4103/0972-4052.164911  PMID:27134427
Background or Statement of Problem: As, the longevity of provisional restorations is related to, a perfect adaptation and a strong, long-term union between restoration and teeth structures, therefore, evaluation of marginal leakage of provisional restorative materials luted with cements using the standardized procedures is essential. Aims and Objectives: To compare the marginal leakage of the provisional crowns fabricated from Autopolymerizing acrylic resin crowns and bisphenol A-glycidyl dimethacrylate (BIS-GMA) resin crowns. To compare the marginal leakage of the provisional crowns fabricated from autopolymerizing acrylic resin crowns and BIS-GMA resin crowns cemented with different temporary luting cements. To compare the marginal leakage of the provisional crowns fabricated from autopolymerizing acrylic resin (SC-10) crowns cemented with different temporary luting cements. To compare the marginal leakage of the provisional crowns fabricated from BIS-GMA resin crowns (Protemp 4) cemented with different temporary luting cements. Methodology: Freshly extracted 60 maxillary premolars of approximately similar dimensions were mounted in dental plaster. Tooth reduction with shoulder margin was planned to use a customized handpiece-holding jig. Provisional crowns were prepared using the wax pattern fabricated from computer aided designing/computer aided manufacturing milling machine following the tooth preparation. Sixty provisional crowns were made, thirty each of SC-10 and Protemp 4 and were then cemented with three different luting cements. Specimens were thermocycled, submerged in a 2% methylene blue solution, then sectioned and observed under a stereomicroscope for the evaluation of marginal microleakage. A five-level scale was used to score dye penetration in the tooth/cement interface and the results of this study was analyzed using the Chi-square test, Mann–Whitney U-test, Kruskal–Wallis H-test and the results were statistically significant P < 0.05 the power of study - 80%. Results: Marginal leakage was significant in both provisional crowns cemented with three different luting cements along the axial walls of teeth (P < 0.05) confidence interval - 95%. Conclusion: The temporary cements with eugenol showed more microleakage than those without eugenol. SC-10 crowns showed more microleakage compared to Protemp 4 crowns. SC-10 crowns cemented with Kalzinol showed maximum microleakage and Protemp 4 crowns cemented with HY bond showed least microleakage.
  3,702 498 -
Applications of cone beam computed tomography for a prosthodontist
George Puthenpurayil John, Tatu Elenjickal Joy, Justin Mathew, Vinod R. B. Kumar
January-March 2016, 16(1):3-7
DOI:10.4103/0972-4052.161574  PMID:27134420
Cone beam computed tomography (CBCT) is a medical imaging technique of X-ray computed tomography where the X-rays are divergent, forming a cone. CBCT systems have been designed for imaging hard tissues of the maxillofacial region. The increasing availability of this technology provides the dental clinician with an imaging modality capable of providing a three-dimensional representation of the maxillofacial skeleton with minimal distortion. This article is intended to elaborate and enunciate on the various applications and benefits of CBCT, in the realm of maxillofacial prosthodontics, over and beyond its obvious benefits in the rehabilitation of patients with implants. With the onus of meticulous reconstruction of near ideal occlusion resting on the prosthodontist, CBCT provides a unique imaging option, which can be a boon in various aspects of prosthodontic practice – from imaging of the temporomandibular joint for accurate movement simulation, to template assisted maxillofacial reconstruction or even over denture therapy. CBCT could play a crucial role in lessening the burden of a hectic prosthodontic routine for the clinician and critically contribute to accurate and effective treatment for the patient. Apart from the authors' clinical experiences shared here, a web-based search for relevant articles in this specific area of interest was also conducted. The selected articles were critically reviewed and the data acquired were systematically compiled.
  3,104 506 -
Denture hygiene knowledge, attitudes, and practices toward patient education in denture care among dental practitioners of Jabalpur city, Madhya Pradesh, India
Vinay Suresan, Sneha Mantri, Suryakant Deogade, K Sumathi, Pragya Panday, Ankit Galav, Kanika Mishra
January-March 2016, 16(1):30-35
DOI:10.4103/0972-4052.175714  PMID:27134425
Context: Researchers have concentrated their focus on denture wearer's attitude and practice toward denture cleansing despite the fact that they should be more focused on the attitudes of the dentists' themselves towards patient education at the time of denture delivery. It is an obligation of every dentist to motivate, instruct and provide the means and methods of plaque control for their patients. Aims: The aim was to assess the denture hygiene knowledge, attitudes and practice towards patient education in denture care among dental practitioners (DPs) of Jabalpur city, Madhya Pradesh, India. Material and Methods: A total of 168 dental practitioners completed a comprehensive questionnaire. All participants signed an informed consent before answering the questionnaire. The institutional review committee approved the study. Statistical Analysis: Chi-square test for non-parametric study was employed to determine the statistical difference between the two groups. A P-value of 0.05 was considered to be statistically significant. Results: Most of the subjects were qualified with a bachelor degree 142 (85%). 25 (18%) subjects did not associate oral biofilms on complete denture with conditions like denture stomatitis and other serious systemic diseases. Approximately half of the DPs 69 (48%) and specialists 8 (31%) agreed that explaining denture hygiene instructions to old patients can be very time consuming. A recall program for their patients is of importance according to 39 (27%) of DPs and 3 (12%) specialists. Conclusions: It may be concluded that the study subjects had limited knowledge of denture cleansing materials and denture hygiene importance. Attitudes varied among the subjects when it came to sharing information with their patients.
  3,164 369 -
Three-dimensional finite element analysis of the stress distribution in the endodontically treated maxillary central incisor by glass fiber post and dentin post
Sarfaraz Memon, Sonal Mehta, Salim Malik, Narendra Nirmal, Deeksha Sharma, Himanshu Arora
January-March 2016, 16(1):70-74
DOI:10.4103/0972-4052.167933  PMID:27134431
Introduction: From the point of dental practice, the restoration of endodontically treated teeth has become an important aspect as it involves a range of treatment options of variable complexity. Restoring teeth with insufficient coronal tooth structure, it is always indicated to use the post to retain a core for definitive restoration. Fiber post has a modulus of elasticity in analogs to dentin structure, thus reducing the stress areas at the dowel dentin interface. However, the only material that can substantiate all these properties can be none other than dentin itself. Materials and Methodology: Three-dimensional (3D) models of the maxillary central incisor were developed incorporating all the nonlinearities. Continuum 3D elements were used in three dimensions. Maxillary central incisor was laser scanned, duplicated with the help of reverse engineering into STL format, and it was converted into 3D model for finite element analysis (FEA). For the model, fixed boundary conditions were applied at the outer bone, while 100 N static vertical occlusal loads were prescribed at 135° on the loading component of the simulated tooth. The stress distribution was evaluated using dentin and fiber post with prescribed materials, loading and boundary conditions in endontically treated teeth by 3D FEA. Results: The analysis for von Misses stress for dentin post showed that the stress in the dentin post at the cervical area was 127 MPa. The displacement in the dentin post was <0.025 mm. Von Misses stress for the fiber post at the cervical area was approximately 182 MPa and the displacement was <0.035 mm. Conclusion: The FEA results showed that the stress in the cervical area of the dentin was more for fiber post when compared to dentin post, and maximum displacement values were less for dentin post in comparison to fiber post.
  3,042 303 -
A comparative evaluation of effect on water sorption and solubility of a temporary soft denture liner material when stored either in distilled water, 5.25% sodium hypochlorite or artificial saliva: An in vitro study
Aditi Garg, K Kamalakanth Shenoy
January-March 2016, 16(1):53-62
Introduction: Soft denture liners have a key role in modern removable prosthodontics since they restore health to inflamed and abused mucosa by redistribution of forces transmitted to the edentulous ridges. The most common problems encountered using soft denture liners are water sorption and solubility when in contact with saliva or storage media. These problems are associated with swelling, distortion, support of Candida albicans growth, and stresses at the liner/denture base interface that reduces the bond strength. Objective: To evaluate the water sorption and solubility of commercially available acrylic based self cure soft denture lining material (GC RELINE™ Tissue Conditioner) after immersion in three different storage media (distilled water, Shellis artificial saliva, 5.25% sodium hypochlorite disinfectant solution) at time interval of 4, 7, 11, and 15 days. Material and Methods: The study involved preparation of artificial saliva using Shellis formula. A total 45 standardized samples of the material (GC RELINE™) were prepared in disk form (15 mm in diameter and 2 mm in thickness). The study was divided into three groups with storage in Control (distilled water), Shellis artificial saliva, and 5.25% sodium hypochlorite. Samples were dried in a desiccator and weighed in the analytical balance to measure the initial weight (mg/cm2) of the disks (W1). The first groups (15 samples) were placed in 30 ml distilled water (Group A) at 37΀C, second group 30 ml of artificial saliva (Group B) and third group in 5.25% sodium hypochlorite (Group C). Disks were removed from disinfectant after 5 min and placed in 30 ml distilled water. On days 4, 7, 11, and 15, all samples were removed from their containers and reweighed to measure the weight (mg/cm2) of the disks after sorption (W2). The solubility was measured by placing the disks back in the desiccator after each sorption cycle and drying them to constant weight in the desiccator. These values were weight after desiccation (W3). Water sorption and solubility was calculated: 1. Sorption (mg/cm2) = (W2−W1)/Surface area 2. Solubility (mg/cm2) = (W1−W3)/Surface area. Statistical Analysis: Statistical Analysis was done using one way analysis of variance and the intercomparison between each group was done using Tukey's honestly significance difference (HSD) test. Results: Within the limitations of this study it was concluded that water sorption of the GC RELINE™ soft denture liner material was highest in distilled water followed by 5.25% sodium hypochlorite and least in Shellis artificial saliva at 4, 7, and 11 day interval. However, on the 15th day, the results showed maximum water sorption in 5.25% sodium hypochlorite followed by distilled water and least in artificial saliva. The results on solubility showed highest solubility of GC RELINE soft denture liner in artificial saliva followed by distilled water and least in 5.25% sodium hypochlorite at 4, 7, 11,and 15 day interval. Discussion: The least water uptake of the soft liner in artificial saliva was due to its ionic properties and supports the theory that water uptake of these materials is osmotically driven. However, the solubility was highest in artificial saliva since it is a mix of various salts and other additives, so there is a possibility of interaction with soft denture lining material.
  3,023 320 -
Prosthetic rehabilitation of an orbital defect for a patient with hemifacial atrophy
Sanath Shetty, Fahad Mohammad, Rajesh Shetty, Kamalakanth Shenoy
January-March 2016, 16(1):91-95
DOI:10.4103/0972-4052.175716  PMID:27134435
Removal of an eye may be indicated in cases of congenital abnormality, severe trauma, or disease such as an infection, tumor, or malignancy. The disfigurement associated with a loss of an eye is often accompanied with physical problems, psychological trauma, and a poor quality of life. A prosthetic replacement is the treatment of choice to return the individual to his normal vocation by producing an acceptable and life-like appearance. This article describes prosthetic rehabilitation of a 19-year-old male suffering from facial hemiatrophy with the loss of his left eye due to retinoblastoma when he was 2-year-old using medically graded silicone material. The technique used is simple, cost effective, and easy way for fabrication and rehabilitation of an orbital defect using silicone prosthesis where retention is achieved by a combination of silicone adhesives and tapes, and to a very small extent by bony and soft tissue undercut, hence providing better esthetic and psychological outcome. The acrylic part of the prosthesis was adhered to the socket with the help of a two-way silicon adhesive tape. Since the patient had lost his eye when he was 2-year-old, the development of eye and periorbital tissue on the defect side lead to hemiatrophy; in our approach, we have attempted to build the prosthesis in par with the normal side so that the fullness on the defect side was restored to that of the contralateral side. The fabricated facial prosthesis was durable, esthetic, and had good retention.
  2,991 209 -
Rehabilitation of orbital cavity after orbital exenteration using polymethyl methacrylate orbital prosthesis
Sumeet Jain, Parul Jain
January-March 2016, 16(1):100-104
DOI:10.4103/0972-4052.167944  PMID:27134437
Squamous cell carcinoma of the eyelid is the second most common malignant neoplasm of the eye with the incidence of 0.09 and 2.42 cases/100 000 people. Orbital invasion is a rare complication but, if recognized early, can be treated effectively with exenteration. Although with advancements in technology such as computer-aided design and computer-aided manufacturing, material science, and retentive methods like implants, orbital prosthesis with stock ocular prosthesis made of methyl methacrylate retained by anatomic undercuts is quiet effective and should not be overlooked and forgotten. This clinical report describes prosthetic rehabilitation of two male patients with polymethyl methacrylate resin orbital prosthesis after orbital exenteration, for squamous cell carcinoma of the upper eyelid. The orbital prosthesis was sufficiently retained by hard and soft tissue undercuts without any complications. The patients using the prosthesis are quite satisfied with the cosmetic results and felt comfortable attending the social events.
  2,791 223 -
An in-vitro study to compare the temperature rise in the pulp chamber by direct method using three different provisional restorative materials
Ankita Piplani, MC Suresh Sajjan, AV Ramaraju, Tushar Tanwani, G Sushma, G Ganathipathi, K Jagdish, Anil Agrawal
January-March 2016, 16(1):36-41
DOI:10.4103/0972-4052.161569  PMID:27134426
Statement of Problem: The provisional restorative materials in fixed prosthodontics are basically bis-GMA resins which releases exothermic temperature while polymerization which can damage the pulp. Intrapulpal temperature exceeding 42.5°C found to result in irreversible damage to the pulp. The remaining thickness of dentine after tooth preparation control the conduction of heat released by the resins. Purpose:(1) To quantify the temperature changes in the pulp chamber using different provisional restorative materials. (2) To evaluate the peak temperature time of different materials used. (3) To compare the intrapulpal temperature changes with a variation in the width of the finish line. Methodology: Two intact mandibular molars were selected and designated as Specimen A and B. Tooth preparation was done to prepare a finish line of 1.2 mm and 1 mm width, respectively. Three provisional restorative materials were considered and they were grouped as Group I-Cool temp, Group II-Protemp-4, Group III-Integrity. A J thermocouple probe was placed into the pulp chamber to determine the rise in temperature. The temperature was recorded during polymerization at 30-s intervals until the peak temperature was reached. The same procedure was repeated for fabricating remaining provisional crowns. A total of 45 provisional crowns were fabricated for each specimen. Results: Kruskal–Wallis test revealed that there was a significant difference in the temperature changes associated with the provisional restorative materials used. All the three provisional restorative materials were compared for 1.2 mm and 1 mm wide finish line. Integrity produced the highest temperature rise and the maximum temperature recorded was 40.2°C in 1.2 mm wide finish line. However, for a 1 mm wide finish line, Protemp-4 produced the highest temperature rise and the maximum temperature recorded was 40.3°C. It was observed that peak temperatures with Specimen B were more when compared with Specimen A. Conclusion: Cool temp showed least temperature rise in the pulp chamber. The order of rise in intrapulpal temperature in tested provisional materials using direct technique would be Cool temp, Integrity, and Protemp-4.
  2,503 279 -
Effect of metal type and surface treatment on shear bond strength of resin cement (in vitro study)
Hiba Al-Helou, Eyad Swed
January-March 2016, 16(1):49-52
DOI:10.4103/0972-4052.164882  PMID:27134428
Background: Resin-bonded fixed partial dentures appeared to prevent the excessive preparation of dental tissue. Investigation of surface treatments to improve the bond of resin cements to metals may contribute to the longevity of these restorations. Due to the potential lack of ideal preparation form, the type of alloy and its surface pretreatment may have clinically relevant correlations with the retentive strength of castings to minimally retentive preparations. Aim: The aim of this search is to study the bonding resin cement strength to different types of the metal alloy due to the surface treatment. Purpose: Evaluate the effects of two different surface treatments on shear bond strength (SBS) between a palladium-silver alloy (Pb-Ag) and commercially pure titanium (CP Ti) cast alloy with resin luting cements. Materials and Methods: A total of 120 cylinders having 5 mm in diameter and 4 mm in height were divided into two different main groups of metal type: 60 cylinders cast from CP Ti Grade I (Tritan - Reintitan - Germany-Dentaurum) as a base metal and 60 cylinders cast from Pb-Ag (Status-Yamakin, Japan) as a noble metal. 30 cylinders from each type were embedded in acrylic resin, and the rest were left without embedded in acrylic resin. All of the cylinders were smoothed with silicon carbide papers and sandblasting with 50-μm aluminum oxide. Specimens of each metal type were divided into two subgroups, which received one of the following luting techniques: (1) Multilink (Ivoclar Vivadent), (2) Multilink (Ivoclar Vivadent) plus metal zirconia primer (MZP). Every two cylinders from the same metal type and surface treatment were bonded to each other. All specimens were stored in distilled water at 37°C for 24 h and then thermal cycled (500 cycles, 5–55°C). After thermal cycling, the specimens were stored in 37°C distilled water for an additional 24 h before being tested in shear strength. Data (MPa) were analyzed using T-s tests to study the significance of various - means among groups and perform a comparison between each two groups of them. Results: The T-s tests indicated significant effect of combination of the sandblasting technique (aluminum oxide particles 50 μm) with the application of primer MZP before using resin cement (P < 0.05) independent of the metal type used. The metal type did not significantly affect SBS for any of the compared surface pretreatments. Conclusion: Metal primer application significantly enhanced SBS to base and a noble metal. No significant differences in shear strength were found between alloys.
  2,451 264 -
Computer-assisted design/computer-assisted manufacturing systems: A revolution in restorative dentistry
Arbaz Sajjad
January-March 2016, 16(1):96-99
DOI:10.4103/0972-4052.164905  PMID:27134436
For the better part of the past 20 years, dentistry has seen the development of many new all-ceramic materials and restorative techniques fueled by the desire to capture the ever elusive esthetic perfection. This has resulted in the fusion of the latest in material science and the pen ultimate in computer-assisted design/computer-assisted manufacturing (CAD/CAM) technology. This case report describes the procedure for restoring the esthetic appearance of both the left and right maxillary peg-shaped lateral incisors with a metal-free sintered finely structured feldspar ceramic material using the latest laboratory CAD/CAM system. The use of CAD/CAM technology makes it possible to produce restorations faster with precision- fit and good esthetics overcoming the errors associated with traditional ceramo-metal technology. The incorporation of this treatment modality would mean that the dentist working procedures will have to be adapted in the methods of CAD/CAM technology.
  2,405 299 -
Rehabilitation of post-traumatic total nasal defect using silicone and acrylic resin
Vikas Aggarwal, Kusum Datta, Sukhjit Kaur
January-March 2016, 16(1):87-90
DOI:10.4103/0972-4052.164902  PMID:27134434
Facial defects resulting from neoplasms, congenital abnormalities or trauma can affect the patient esthetically, psychologically, and even financially. Surgical reconstruction of large facial defects is sometimes not possible and frequently demands prosthetic rehabilitation. For success of such prosthesis, adequate replication of natural anatomy, color matching and blending with tissue interface are important criteria. Variety of materials and retention methods are advocated to achieve a functionally and esthetically acceptable restoration. Silicones are the most commonly used materials because of flexibility, lifelike appearance and ability to be used in combination with acrylic resin which is hard, provides body and helps in achieving retention to the prosthesis by engaging mechanical undercuts. Furthermore, the acrylic portion can be relined easily, thus helping comfortable wear and removal of the prosthesis by patient without traumatizing nasal mucosa. This case report describes time saving and cost effective prosthetic rehabilitation of a patient with total nasal defect using custom sculpted nasal prosthesis made up of silicone elastomer and acrylic resin, which is retained by engaging mechanical undercut and use of biocompatible silicone adhesive.
  2,335 232 -
Spectrophotometric evaluation of shade reproduction of pressable all-ceramic system on un-stained and stained tooth: An in vitro study
Neelam Pande, Maithili S Kolarkar
January-March 2016, 16(1):63-69
DOI:10.4103/0972-4052.175711  PMID:27134430
Purpose: To evaluate the shade reproduction of a pressable all-ceramic system placed on unstained and stained extracted maxillary central incisor using a color measurement spectrophotometer. In addition, to compare shade reproduction of this material with low translucency and medium opacity on unstained tooth and medium and high opacity on stained tooth. Materials and Methods: Total 45 discs, with difference in the opacity of core, were used. After spectrophotometric evaluation, shade reproduction of the discs was compared and calculated by formula: Δ E+ = ([Δ L+]2+ [Δ a+]2+ [Δ b+]2) 1/2. Results: Student's t-test showed that in a sample of 15, the values of Δ E+ for Group I - LT (Us.T.) lie between 0 and l, for Group II - MO (for Us. as well as S.T.) between l and 2, for Group III - HO (S.T.) are all above 5. Comparison among groups after t-test showed that mean Δ E+ values of Group I - LT is less than Group II - MO for the unstained tooth, Δ E+ for Group II - MO is less than average Δ E+ value of Group III - HO for stained tooth. Conclusion: All-ceramic with low translucency can be used for the fabrication of restoration on the unstained tooth as it gives the best shade reproduction. The medium opacity material may be used on the unstained as well as on stained tooth. However, the clinical implication of high opacity is limited when applied over the stained tooth as it is giving a shade reproduction, which is not within acceptable limits.
  1,954 207 -
Retrospective study on the 7.5-year survival of resin-bonded dental prostheses in single missing second premolar cases
Aya Deniz Izgi, Sebnem Eskimez, Ediz Kale
January-March 2016, 16(1):26-29
DOI:10.4103/0972-4052.167936  PMID:27134424
Purpose: The purpose of this study is to report retrospectively the clinical results of cast metal slot-retained resin-bonded fixed dental prostheses (RBFDPs) used in the restoration of single missing second premolar teeth, as this kind of prostheses provides acceptable clinical outcomes in a minimally invasive and esthetic treatment for the average patient requiring cheaper and faster treatment alternative for a single missing posterior tooth. However, the data present in the literature are scarce. Materials and Methods: Clinical follow-up was reported up to 7.5 years in nine different cast metal slot-retained RBFDPs patients of both genders between 21 and 49 years of age. Routine clinical controls were performed 6 and 12 months after treatment, followed by regular intervals every year afterward. The Kaplan–Meier survival estimation method was used to determine the overall and functional survival rates and times of the RBFDPs at the end of the observation period. Results: At the end of the follow-up, all of the RBFDPs were still functional with a mean follow-up of 6.7 years. The Kaplan–Meier estimation for the overall survival was calculated as 89% for up to 7.5 years with one failure due to debonding. The functional survival rate was 100% with the lowest and highest observation periods being 5.8 and 7.5 years, respectively. Conclusions: Within the limitations of this retrospective clinical study, it seems that the design and cementation regimen used for the RBFDPs presented can guarantee clinical success in the restoration of single missing second premolar teeth.
  1,946 150 -
Shilpa Shetty
January-March 2016, 16(1):2-2
DOI:10.4103/0972-4052.175713  PMID:27134419
  1,514 112 -
Research reorientation
N Gopi Chander
January-March 2016, 16(1):1-1
DOI:10.4103/0972-4052.175712  PMID:27134418
  1,428 153 -