Thesis Chapters by HIMABINDU RAVELLA
Janeela Roja Kapa, et al. This is an open access journal and article distributed under the terms ... more Janeela Roja Kapa, et al. This is an open access journal and article distributed under the terms of the creative commons attribution noncommercial 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.
PubMed - National Library of Medicine - ID: 101738774, 2020
The study was done to evaluate retention and stability of implant supported over dentures placed ... more The study was done to evaluate retention and stability of implant supported over dentures placed on ball , locator and ball attachment systems with color coded elastic inserts. Materials and Methodology Ball, Locator attachments (Rhein 83) with color coded elastic inserts(white, pink and yellow) and for Bar attachment system (Rhein 83) inserts (yellow, pink) are used in this study. Edentulous mandibular acrylic resin models are fabricated and four implant analogs are placed in the canine and second premolar regionusing fabricated guiding template. Attachments with different inserts were placed on the implant analogs and 8 over dentures were fabricated. The retention and stability of overdenture with each color coded insert was tested with Universal testing machine before and after thermocycling. Result The obtained values were subjected to statistical analysis and a statistically significant difference was observed (p value< 0.05). Conclusion Locator attachment had the highest retention and stability values followed by Balland Bar attachments.
PURPOSE OF THE STUDY: To compare the marginal discrepancy and fracture resistance of porcelain la... more PURPOSE OF THE STUDY: To compare the marginal discrepancy and fracture resistance of porcelain laminate veneers fabricated with three different tooth preparation designs and assessment of micro tensile bond strength of veneers prepared on normal and fluorosed teeth with the same preparation design. MATERIALS AND METHODOLOGY: 50 extracted maxillary teeth were collected, 40 normal and 10 fluorosed teeth. Three different preparation designs were chosen for 30 normal tooth samples. Group I (n=10) is with Window preparation design, Group II (n=10) with Butt joint preparation and Group III (n=10) with Incisal overlap design. Remaining 20 samples are to be tested for Micro Tensile Bond Strength between Group A (n=10, normal teeth) and Group B (n=10, fluorosed teeth) with only Incisal overlap design. Veneers were fabricated with IPS Empress Esthetic Ingots. The first 30 samples are tested with Stereomicroscope for assessment of marginal discrepancy followed by measurement of fracture resistance with Universal Testing Machine at an angle of 45⁰. Micro Tensile Bond Strength is evaluated in between Normal and Fluorosed teeth with Universal Testing Machine. RESULTS: Highest marginal discrepancy value of ceramic veneers was found in the Incisal overlap preparation (Group 3) at both incisal and cervical areas and least found with Butt joint preparation (Group 2). Fracture resistance was least in Window preparation (Group 1) and highest in Incisal overlap preparation (Group 3). There is statistically significant difference found between all the three groups. Values from Micro Tensile Bond Strength test between veneers on normal (group A) and fluorosed teeth (Group B) did not result in any statistical significant values. CONCLUSION: Marginal discrepancy was minimal in Butt joint preparation. Fracture resistance was significant with Incisal overlap design though it had higher marginal discrepancy. Presence of fluorosis did not influence the bond strength values between normal and fluorosed teeth.
In the recent years the practice of oral implantology has been expanding widely and is creating a... more In the recent years the practice of oral implantology has been expanding widely and is creating an area of interest for the dental practitioners and awareness among the patients. Though the use of prophylactic antibiotics during implant placement still remains controversial, several clinical studies suggest that the use of prophylactic antibiotics significantly improves short and long term implant survival. Also prior to oral surgical procedures patients with risk for developing infectious endocarditis and immuno compromised antibiotic prophylaxis is well recommended.
Papers by HIMABINDU RAVELLA
The International journal of oral & maxillofacial implants
The purpose of this investigation was to evaluate the effects of number and distribution of impla... more The purpose of this investigation was to evaluate the effects of number and distribution of implants upon in vitro dislodging forces to a simulated implant-supported overdenture and to examine differences between several different attachment systems. An experiment was undertaken utilizing a model simulating a mandibular edentulous ridge with dental implants in positions on the model approximating tooth positions in the natural dentition. A cobalt-chromium-cast testing framework was used to measure the peak load required to disconnect an attachment. Four different types of commercially available attachments were used in various positions on the model in sequence to evaluate the effects of retention and stability of overdentures based on implant number and distribution: (1) ERA, (2) O-Ring, (3) Locator, and (4) Ball. For each group, 10 measurements were made of peak dislodging forces. Means were calculated and differences among the systems, directions, and groups were identified using...
International Journal of Dental Science and Innovative Research (IJDSIR), 2019
Titanium-based materials have been used for dental implants due to their excellent biological com... more Titanium-based materials have been used for dental implants due to their excellent biological compatibility, superior mechanical strength and high corrosion resistance. In an attempt to increase the success rate of implants the surface of implant is modified to enhance the properties by physical methods like acid etching , mechanical blasting, anodization , laser treatment or by addition of bioactive coatings on the implant surface.. As the topic is vast this article is limited only to the overview of Bio-active or bio-mimeticimplant coatings and their applications. Clinical advantages attributed to these surface coatings discussed in this article are osseointegration, antimicrobial activity , wear and corrosion resistance .
Indian Journal of Dentistry, 2014
The aim is to study the surface finish of ceramic restorations by glazing and polishing procedure... more The aim is to study the surface finish of ceramic restorations by glazing and polishing procedures and compare the surface morphology to determine the presence or absence of surface cracks on porcelain specimens observed under optical (light) microscope and a scanning electron microscope (SEM). Materials and methods: Thirty six specimens of vita VMK 68 No. 559 incisal porcelain were prepared and divided into eight groups (n ¼ 6) (Group IeGroup VI) and then subjected to various polishing and glazing procedures. The specimens were then observed under optical (light) microscope and scanning electron microscope (SEM). Results: Groups I, II, III, V, did not exhibit any surface cracks whereas Groups IV & VI which were ground, polished and then re-glazed exhibited micro cracks on the surface of the specimens. Dental porcelains which are extensively used in dentistry have been constantly evolving to maximize strength. Within the limitations of this study it was observed that the optical (light) microscope and SEM analysis correlate with each other. The specimen surfaces that were polished and then self-glazed exhibited formation of fine surface cracks.
annals and essences of dentistry, 2013
In the recent years the practice of oral implantology has been expanding widely and is creating a... more In the recent years the practice of oral implantology has been expanding widely and is creating an area of interest for the dental practitioners and awareness among the patients. Though the use of prophylactic antibiotics during implant placement still remains controversial, several clinical studies suggest that the use of prophylactic antibiotics significantly improves short and long term implant survival. Also prior to oral surgical procedures patients with risk for developing infectious endocarditis and immuno compromised antibiotic prophylaxis is well recommended.
Indian Journal of Dentistry, 2014
The aim is to study the surface finish of ceramic restorations by glazing and polishing procedure... more The aim is to study the surface finish of ceramic restorations by glazing and polishing procedures and compare the surface morphology to determine the presence or absence of surface cracks on porcelain specimens observed under optical (light) microscope and a scanning electron microscope (SEM). Materials and methods: Thirty six specimens of vita VMK 68 No. 559 incisal porcelain were prepared and divided into eight groups (n ¼ 6) (Group IeGroup VI) and then subjected to various polishing and glazing procedures. The specimens were then observed under optical (light) microscope and scanning electron microscope (SEM). Results: Groups I, II, III, V, did not exhibit any surface cracks whereas Groups IV & VI which were ground, polished and then re-glazed exhibited micro cracks on the surface of the specimens. Dental porcelains which are extensively used in dentistry have been constantly evolving to maximize strength. Within the limitations of this study it was observed that the optical (light) microscope and SEM analysis correlate with each other. The specimen surfaces that were polished and then self-glazed exhibited formation of fine surface cracks.
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Thesis Chapters by HIMABINDU RAVELLA
Papers by HIMABINDU RAVELLA