Stress analysis of partial dentures

MacGregor, A.R.; Miller, T.P.G.; Farah, J.W.

doi:10.1016/0300-5712(78)90209-9

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Many of the designs of fixed and removable appliances have evolved over the years from a mixture of engineering theory, clinical experience and empirical judgement. This investigation has been carried out to examine some of the variables and is a continuation of work previously reported by MacGregor et al (1978MacGregor et al ( , 1980 who examined stresses on removable partial dentures of different designs by means of three-dimensional photoelastic analysis.…”

Section: Introductionmentioning

confidence: 98%

The support of bounded saddles

MacGregor

Miller

Farah

1983

Journal of Dentistry

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Section: Introductionmentioning

confidence: 98%

The support of bounded saddles

MacGregor

Miller

Farah

1983

Journal of Dentistry

Self Cite

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“…Thus, photoelasticity has been used in scientific studies in order to determine the distribution of the stress in structural systems through qualitative and quantitative analysis by means of optical elements [20]. Photoelastic analysis allows for the observation of the distribution of the stress in the whole structure, enabling a general perception of the behavior of the stress [21]. In this technique, the localization of the stress is observed inside an experimental model through fringes of different colorings.…”

Section: Introductionmentioning

confidence: 99%

Photoelastic Analysis of the Vertebral Fixation System Using Different Screws

Fakhouri

Shimano

Araújo

et al. 2012

Eng. Technol. Appl. Sci. Res.

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The purpose of this study was to compare using photoelasticity, the internal stresses produced by two types of pedicular screws (Synthes™) with three different diameters, when submitted to different pullout strengths. The fringe orders were evaluated around the screws using the Tardy compensation method. In all the models analyzed, the shear stress was calculated. Results showed that, independently of the applied load, the screw of smaller outer diameter had larger values of shear stress. According to the analysis realized, we observed that the place of highest stress was in the last thread, close to the head of the screws.

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Removable partial denture design: A photoelastic study

Stewart

Edwards

1984

J. Biomed. Mater. Res.

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Quantifiable frozen-stress photoelastic techniques were used to analyze stresses induced in mandibular models by a conventional free-end saddle removable partial denture. Four quasi-anatomical mandibular models were constructed for processing, together with their respective calibration specimens, through identical time/temperature stress-freezing cycles. After processing and slicing, an unloaded control model demonstrated some low-order fringes adjacent to the coronal third of the abutment tooth roots, but was otherwise stress free. A lower bilateral free-end saddle partial denture was constructed and fitted in turn to each of the remaining three models. Each denture/model combination was then loaded and processed through a stress-freezing cycle. After processing, 6-mm slices were cut from selected regions for analysis for the presence of stresses. Using a polariscope with circular polarized, monochromatic light, values for maximum shear stress were calculated at selected points in the slices taken from the three loaded models. Variations up to 28% of the mean were obtained for the three experimental models as compared with the consistent results for the material fringe values obtained from the calibration specimens. The study pointed out the problems involved in using photoelastic stress analysis on complicated anatomical models. The interpretation of the results from such studies should be approached with caution.

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Stress analysis of partial dentures

Cited by 9 publications

References 14 publications

The support of bounded saddles

The support of bounded saddles

Photoelastic Analysis of the Vertebral Fixation System Using Different Screws

Removable partial denture design: A photoelastic study

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