scholarly journals Patient Satisfaction and Stress Distribution of Flexible and Cobalt Chromium Partial Dentures

2018 ◽  
Vol 5 (2) ◽  
pp. 145-151
Author(s):  
Basma Abdel-Fdeel ◽  
Shereen Kbeel ◽  
Mohamed Sanad
Keyword(s):  
Patient Satisfaction ◽  
Stress Distribution ◽  
Cobalt Chromium

scholarly journals Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture

2013 ◽  
Vol 70 (11) ◽  
pp. 999-1005
Author(s):  
Miodrag Scepanovic ◽  
Ljiljana Tihacek-Sojic ◽  
Milan Tasic ◽  
Radivoje Mitrovic ◽  
Aleksandar Todorovic ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Safety Factor ◽  
Computer Aided Design ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Cocrmo Alloy ◽  
Partial Denture ◽  
Cocrmo Alloys

Bacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of RCAs. This study was based on analyzing properties of clasps designed by conventional clasp wax profiles and defining the optimal shapes of RCAs for stress distribution and safety factor aspects. Methods. Computer-aided-design (CAD) models of RCAs with simulated properties of materials used for fabrication of RPD cobalt-chromium-molybdenum (CoCrMo) alloy, commercially pure titanium (CPTi) and polyacetale were analyzed. Results. The research showed that geometrics of Rapidflex profiles from the BIOS concept are defined for designing and modeling RCAs from CoCrMo alloys. I-Bar and Bonihard clasps made from CPTi might have the same design as Co- CrMo clasp only by safety factor aspect, but it is obvious that CPTi are much more flexible, so their shape must be more massive. Polyacetale clasps should not be fabricated by BIOS concept for CoCrMo alloy. A proof for that is the low value of safety factor. Conclusion. The BIOS concept should be used only for RCAs made of CoCrMo alloy and different wax profiles should be used for fabricating clasps of other investigated materials. The contribution of this study may be the improvement of present systems for defining the clasps shapes made from CoCrMo alloys. The more significant application is possibility of creating new concepts in defining shapes of RCA made from CPTi and polyacetale.

scholarly journals Stress distribution & deflection in an Aramany class II obturator fabricated with cobalt-chromium & titanium alloys – 3D FEA

2019 ◽  
Vol 31 (2) ◽  
pp. 251-257 ◽  
Author(s):  
Takshil D. Shah ◽  
Y.G. Naveen ◽  
Puttaraj Kattimani ◽  
Giridhar Kamath ◽  
Kalind Shah ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Titanium Alloys ◽  
Class Ii ◽  
Cobalt Chromium ◽  
3D Fea

scholarly journals Studying the effect of different RPD design and materials on reduced bone support, a FEA study.

2018 ◽  
Vol 40 (1) ◽  
pp. 5-10
Author(s):  
Wasmaa S Mahmood ◽  
Souza A Aziz ◽  
Imad A Jebouri
Keyword(s):  
Titanium Alloy ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Modulus Of Elasticity ◽  
Class I ◽  
Cobalt Chromium ◽  
Bone Material ◽  
Partial Denture ◽  
Significant Difference ◽  
Design Type

Aim of the study: To study the effect of reduced level of bone support on stress concentration and distribution. Also comparing the effect of different metals (gold, cobalt-chromium, and titanium) on alveolar supporting bone. Material and methods: A FEA method is used on a reduced bone support class I Kennedy classification, with three different rest positions (mesial, distal, mesial and distal) Co-Cr partial denture; Then changing the modulus of elasticity of the chrome-cobalt, to study the effect of gold and titanium alloy on the supporting bone surrounding the abutment in terms of stress distribution. Results: results revealed that best design type is by placing mesial and distal rest on abutment, also when comparing the three types of metals (Co-Cr, titanium, gold), there was no significant difference among the three metals.

scholarly journals Comparative Evaluation of Stress Distribution of Zirconia, Cobalt Chromium and Polyetheretherketone (PEEK) Framework Material on an Atrophic Maxilla in All-on-6 Implant Treatment Concepts – A 3 Dimensional Finite Element Analysis

2020 ◽  
pp. 1-7
Author(s):  
Neethu Elizabeth Antony ◽  
◽  
S. Padmaja ◽  
Malathi Dayalan ◽  
◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Cobalt Chromium ◽  
Element Analysis ◽  
Anterior Maxilla ◽  
Posterior Teeth ◽  
Oblique Loading ◽  
Treatment Concepts ◽  
Implant Treatment

Aims: To evaluate the effect of prosthetic framework material on the stress distribution patterns of All-on-Six implant support system under vertical and oblique loading. Methods and Material: The CBCT images of the maxilla were converted to stereo lithography file. HYPERMESH software system was accustomed to convert 3D pictures into numerical models. Geometric model of short implant and zirconia, cobalt chromium and polyetheretherketone (PEEK) framework material were created using SOLID EDGE software and were then be inserted in the bone model. A total of six models were constructed with three different types of framework materials with four implants in the anterior maxilla region and two distal short implants and mini-abutments. The prosthetic frameworks were made with 14 teeth (central incisors to second molar bilaterally). The models were transferred through the solid works simulation program for finite element analysis and stress distribution investigation. An oblique load of 150N with 300 inclination in the linguo-buccal direction and vertical loads parallel to long axis of the tooth with 100 N magnitude were applied unilaterally on the posterior teeth of each framework. Results: Principal and Von misses stress in PEEK framework were least when compared to stresses in zirconia and cobalt chromium framework on vertical loading and oblique loading. Conclusions: PEEK as a framework material had least stress for the All on Six implant treatment concepts on vertical and oblique forces than zirconia and cobalt chromium framework.

scholarly journals Biomechanical Aspects of Various Attachments for Implant Overdentures: A Review

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3248
Author(s):  
Bharat Mirchandani ◽  
Ting Zhou ◽  
Artak Heboyan ◽  
Sirasa Yodmongkol ◽  
Borvornwut Buranawat
Keyword(s):  
Patient Satisfaction ◽  
Survival Rate ◽  
Stress Distribution ◽  
Web Of Science ◽  
Lateral Force ◽  
Tissue Response ◽  
Implant Overdenture ◽  
Technological Developments ◽  
Plastic Resin

There have been considerable recent technological developments for implant overdenture attachments. This study presents an overview of the biomechanical and biomolecular aspects of various attachments for implant overdenture. Available articles on attachments for implant overdenture were reviewed from January 1980 to August 2021 in the ScienceDirect, MEDLINE/PubMed, and Web of Science resources, and relevant studies were included in this study. We focused on the following topics: attachment systems, retention of various attachments, stress distribution with different attachments, the design and fabrication of attachments, digital techniques in overdenture attachments, and the effects of attachments in peri-implant health. We found that plastic resin is commonly used for ball and bar attachments, whereas nylon resin is commonly used in locator attachments. The locator system offers a valuable attachment option for implant-retained overdenture. Attachment retention reduces while lateral force increases with implant inclination in overdenture. The higher the retention of an overdenture attachment, the higher the transferred stresses. Additionally, clip loading produces more stress in implants and precision elements than bar-retained dentures. As such, we conclude that the ball and locator systems the best overdenture systems due to their superior tissue response, survival rate, and patient satisfaction.

The concerted use of SEM, TEM, and SCM for examination of resin-dentin interfaces

1994 ◽  
Vol 52 ◽  
pp. 476-477
Author(s):  
B. Van Meerbeek ◽  
L. J. Conn ◽  
E. S. Duke
Keyword(s):  
Surface Layer ◽  
Stress Distribution ◽  
Phosphoric Acid ◽  
Bonding Mechanism ◽  
Restorative Dentistry ◽  
Dental Adhesive ◽  
Low Viscosity ◽  
Dentin Adhesives ◽  
Acid Etch ◽  
Tooth Tissue

Restoration of decayed teeth with tooth-colored materials that can be bonded to tooth tissue has been a highly desirable property in restorative dentistry for many years. Advantages of such an adhesive restorative technique over conventional techniques using non-adhesive metal-based restoratives include improved restoration retention with minimal sacrifice of sound tooth tissue for retention purposes, superior adaptation and sealing of the restoration margins in prevention of caries recurrence, improved stress distribution across the tooth-restoration interface throughout the whole tooth, and even reinforcement of weakened tooth structures. The dental adhesive technology is rapidly changing. An efficient resin bond to enamel has already long been achieved. Its bonding mechanism has been fully elucidated and has proven to be a durable and reliable clinical treatment. However, bonding to dentin represents a greater challenge. After the failures of a dentin acid-etch technique in imitation of the enamel phosphoric-acid-etch technique and a bonding procedure based on chemical adhesion, modern dentin adhesives are currently believed to bond to dentin by a micromechanical hybridization process. This process is developed by an initial demineralization of the dentin surface layer with acid etchants exposing a collagen fibril arrangement with interfibrillar microporosities that subsequently become impregnated by low-viscosity monomers. Although the development of such a hybridization process has well been documented in the literature, questions remain with respect to parameters of-primary importance to adhesive efficacy.

Improving Communication Skills in Health Care

2013 ◽  
Vol 20 (3) ◽  
pp. 109-117
Author(s):  
Lynda Katz Wilner ◽  
Marjorie Feinstein-Whittaker
Keyword(s):  
Health Care ◽  
Patient Satisfaction ◽  
Communication Skills ◽  
Health Care Professionals ◽  
Skills Training ◽  
International Medical Graduate ◽  
Medical Graduate ◽  
Health Care Environment ◽  
Medical Interpreters ◽  
Accent Modification

Hospital reimbursements are linked to patient satisfaction surveys, which are directly related to interpersonal communication between provider and patient. In today’s health care environment, interactions are challenged by diversity — Limited English proficient (LEP) patients, medical interpreters, International Medical Graduate (IMG) physicians, nurses, and support staff. Accent modification training for health care professionals can improve patient satisfaction and reduce adverse events. Surveys were conducted with medical interpreters and trainers of medical interpreting programs to determine the existence and support for communication skills training, particularly accent modification, for interpreters and non-native English speaking medical professionals. Results of preliminary surveys suggest the need for these comprehensive services. 60.8% believed a heavy accent, poor diction, or a different dialect contributed to medical errors or miscommunication by a moderate to significant degree. Communication programs should also include cultural competency training to optimize patient care outcomes. Examples of strategies for training are included.

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