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Shetty, Thilak
- A Study to Compare the Stress Patterns in the Edentulous Mandibular Bone around the Two Implant Retained Over Denture and the Prosthesis Restored with All-On-Four Concept Using the Three Dimensional Finite Element Analysis
Authors
1 Associate Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, IN
2 Professor & Head, Department of Aeronautical Engineering, Manipal Institute of Technology, Manipal, Manipal Academy of Higher Education, Karnataka, IN
3 Professor & Head, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, IN
4 Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, IN
Source
Indian Journal of Forensic Medicine & Toxicology, Vol 14, No 1 (2020), Pagination: 130-133Abstract
When we consider the rehabilitation of patients with the mandibular implant supported over denture, the influence of the implant number and the cantilever design on the stress distribution on the bone needs to be assessed precisely.
Purpose: The purpose of the simulation study was to compare the biomechanical behavior of the two implant supported over denture design with the All-On-Four Concept using the three dimensional finite element method thereby evaluating the Von Misses stresses induced on the implant under different loading simulations.
Materials & Method: Three dimensional models representing mandible restored with two implant supported prosthesis was compared with the models that were restored based on the ‘All-On-Four’ concept. The models were then subjected to four different loading simulations (full mouth biting, canine disclusion, load on cantilever, and load in the absence of cantilever). The maximum von Mises stresses were localized and quantified for comparison.
Results: Among the models, under all loading simulations, the maximum stress concentrations were along the neck of the implant. The stress levels for full mouth loading simulation was highest for two implant supported overdenture design and the least for All-On-Four overdenture design. In all the designs, the least stress was when the implants were loaded in a lateral direction. The stress levels for cantilever and non-cantilevered designs were nearly the same for all the simulated designs.
Conclusion: When tested under different loading simulations, both models showed similar location and distribution of stress patterns. Thus from the study it can be concluded that the All-On-Four Concept is a clinically applicable treatment option for the atrophic edentulous ridges and induces least amount of stresses on the edentulous ridges. Therefore the overall longevity of the prosthesis is greatly enhanced.
Keywords
Atrophic Mandible, Biomechanics, Finite Element Analysis, Implants Supported Prosthesis, Tilted Implants.
- Prosthetic Rehabilitation of Patient with Mixed Connective Tissue Disease Using Glove Type Silicone Finger and Toe Prosthesis
Authors
1 Professor, Department of Prosthodontics, MCODS, Mangalore, IN
2 Postgraduate Student, Department of Prosthodontics, MCODS, Mangalore, IN
3 Professor & Head, Department of Prosthodontics, MCODS, Mangalore, IN
4 Professor, Department of Prosthodontics, A J Institute of Memorial Dental Sciences, Mangalore, IN
5 Associate Professor, Department of Prosthodontics, MCODS, Mangalore, IN
Source
Indian Journal of Forensic Medicine & Toxicology, Vol 14, No 1 (2020), Pagination: 134-137Abstract
The hand is a powerful tool and its loss causes a severe psychological and physical drawback. A considerable number of people each year suffer finger or partial finger amputations as a result of malignant disease, trauma, and congenital deformity.
Prosthetic restoration is usually considered difficult for the whole or a part of the finger and it worsens if multiple fingers are involved. Additionally in patients with mixed connective tissue disorders with overlapping clinical features of scleroderma and arthritis any undue pressure from the artificial rings or vacuum fit of the prosthesis might cause further vasoconstriction that could worsen blood flow to extremities. This clinical report describes a simple and economical method for prosthetic rehabilitation of a patient with mixed connective tissue disease following digital loss using a custom made prosthesis with medical grade tissue adhesive as retentive aid.
Keywords
Finger Prosthesis, Silicone,mixed Connective Tissue Disorder.- Assessment of Needle Stick Injury in an Institutional Set up:A Retrospective Analysis
Authors
1 Professor & Head, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, IN
2 Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, IN
3 Associate Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, IN
4 Senior Lecturer, Division of Clinical Dentistry, International Medical University, Kuala Lumpur, MY
Source
Indian Journal of Forensic Medicine & Toxicology, Vol 14, No 1 (2020), Pagination: 154-157Abstract
Purpose: Occupational exposure to blood borne pathogens with needle stick or other sharp tool injuries is a serious but preventable problem. this study will be conducted to investigate the incidence of Needle stick injury (NSI) among the Dental health care providers (DHCP) of Manipal College of Dental Sciences, Mangalore.
Method: The NSI incidence, demographics, contributing factors, and follow up following NSI report were reviewed.
Results: Six, eleven, seventeen and nineteen needle stick injuries were reported in 2010, 2011, 2012 and 2013 respectively. Most injuries were experienced by students and least by the Faculty.
Conclusion: Based on the results and within the limitations of this surveillance study it is concluded that occupational exposures can be reduced and reporting of all exposures is vital. The institution of appropriate PEP, psychological support and counselling of affected HCWs and stringent follow-up are all needed to reduce the burden of occupationally acquired infections in HCWs
Keywords
Needle Stick Injury (NSI) , Health Care Worker (HCW), Dental Students.- A Study to Compare the Stress Patterns in the Edenulous
Authors
1 Professor & Head, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Mangalore, IN
2 Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Mangalore, IN
3 Associate Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Mangalore, IN
4 Senior Lecturer, Division of Clinical Dentistry, International Medical University, Kuala Lumpur, MY
Source
Indian Journal of Forensic Medicine & Toxicology, Vol 14, No 1 (2020), Pagination: 158-161Abstract
Purpose: Occupational exposure to blood borne pathogens with needle stick or other sharp tool injuries is a serious but preventable problem. this study will be conducted to investigate the incidence of Needle stick injury (NSI) among the Dental health care providers (DHCP) of Manipal College of Dental Sciences, Mangalore.
Method: The NSI incidence, demographics, contributing factors, and follow up following NSI report were reviewed.
Results: Six, eleven , seventeen and nineteen needle stick injuries were reported in 2010, 2011, 2012 and 2013 respectively. Most injuries were experienced by students and least by the Faculty.
Conclusion: Based on the results and within the limitations of this surveillance study it is concluded that occupational exposures can be reduced and reporting of all exposures is vital. The institution of appropriate PEP, psychological support and counselling of affected HCWs and stringent follow-up are all needed to reduce the burden of occupationally acquired infections in HCWs.
Keywords
Needle Stick Injury (NSI) , Health Care Worker (HCW), Dental Students.- Comparative Evaluation of Effect of Auxillary Grooves on Retention of Complete Cast Crowns in Molar Teeth–An In-Vitro Study
Authors
1 Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, IN
2 Private Practitioner, Thilagar Dental Clinic, South Car Street, Sivakasi, IN
3 Associate Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, IN
4 Professor and Head, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, IN