Photoelastic stress analysis of self-threading pins.

James Ragain, P. Yaman, R. G. Craig

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this laboratory study six self-threading retention pins were evaluated using the two-dimensional photoelastic technique. The experimental samples consisted of 60 blocks of PSM-1 photoelastic material measuring 1" by 1" by 1/4". The samples were divided into six groups of 10 blocks each, with each group representing one of the pins used in the study. Pins were inserted and cores of amalgam and composite were fabricated over the pins. The samples were observed in the polariscope and photographed after pin insertion and after loading the cores with a constant, compressive force of 20 pounds. Using magnification, fringe orders were counted and rounded to the highest 0.5 fringe order. Each sample was evaluated for apical and shoulder stress. All statistical analyses were done using ANOVA at the P = 0.05 significance level. It was concluded from this study that the insertion of self-threading retention pins results in stress at the apical and shoulder areas of the pin. Pin design features, such as shoulder stops, significantly affect the magnitude and location of stress. There were no significant differences in either the apical or shoulder stresses induced when cores were made of either amalgam or composite resin.

Original languageEnglish (US)
Pages (from-to)218-223
Number of pages6
JournalOperative Dentistry
Volume18
Issue number6
StatePublished - Nov 1993
Externally publishedYes

Fingerprint

Composite Resins
Analysis of Variance

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

Ragain, J., Yaman, P., & Craig, R. G. (1993). Photoelastic stress analysis of self-threading pins. Operative Dentistry, 18(6), 218-223.

Photoelastic stress analysis of self-threading pins. / Ragain, James; Yaman, P.; Craig, R. G.

In: Operative Dentistry, Vol. 18, No. 6, 11.1993, p. 218-223.

Research output: Contribution to journalArticle

Ragain, J, Yaman, P & Craig, RG 1993, 'Photoelastic stress analysis of self-threading pins.', Operative Dentistry, vol. 18, no. 6, pp. 218-223.
Ragain, James ; Yaman, P. ; Craig, R. G. / Photoelastic stress analysis of self-threading pins. In: Operative Dentistry. 1993 ; Vol. 18, No. 6. pp. 218-223.
@article{3af978e7f723438d93a1762415c2f27a,
title = "Photoelastic stress analysis of self-threading pins.",
abstract = "In this laboratory study six self-threading retention pins were evaluated using the two-dimensional photoelastic technique. The experimental samples consisted of 60 blocks of PSM-1 photoelastic material measuring 1{"} by 1{"} by 1/4{"}. The samples were divided into six groups of 10 blocks each, with each group representing one of the pins used in the study. Pins were inserted and cores of amalgam and composite were fabricated over the pins. The samples were observed in the polariscope and photographed after pin insertion and after loading the cores with a constant, compressive force of 20 pounds. Using magnification, fringe orders were counted and rounded to the highest 0.5 fringe order. Each sample was evaluated for apical and shoulder stress. All statistical analyses were done using ANOVA at the P = 0.05 significance level. It was concluded from this study that the insertion of self-threading retention pins results in stress at the apical and shoulder areas of the pin. Pin design features, such as shoulder stops, significantly affect the magnitude and location of stress. There were no significant differences in either the apical or shoulder stresses induced when cores were made of either amalgam or composite resin.",
author = "James Ragain and P. Yaman and Craig, {R. G.}",
year = "1993",
month = "11",
language = "English (US)",
volume = "18",
pages = "218--223",
journal = "Operative Dentistry",
issn = "0361-7734",
publisher = "Indiana University School of Dentistry",
number = "6",

}

TY - JOUR

T1 - Photoelastic stress analysis of self-threading pins.

AU - Ragain, James

AU - Yaman, P.

AU - Craig, R. G.

PY - 1993/11

Y1 - 1993/11

N2 - In this laboratory study six self-threading retention pins were evaluated using the two-dimensional photoelastic technique. The experimental samples consisted of 60 blocks of PSM-1 photoelastic material measuring 1" by 1" by 1/4". The samples were divided into six groups of 10 blocks each, with each group representing one of the pins used in the study. Pins were inserted and cores of amalgam and composite were fabricated over the pins. The samples were observed in the polariscope and photographed after pin insertion and after loading the cores with a constant, compressive force of 20 pounds. Using magnification, fringe orders were counted and rounded to the highest 0.5 fringe order. Each sample was evaluated for apical and shoulder stress. All statistical analyses were done using ANOVA at the P = 0.05 significance level. It was concluded from this study that the insertion of self-threading retention pins results in stress at the apical and shoulder areas of the pin. Pin design features, such as shoulder stops, significantly affect the magnitude and location of stress. There were no significant differences in either the apical or shoulder stresses induced when cores were made of either amalgam or composite resin.

AB - In this laboratory study six self-threading retention pins were evaluated using the two-dimensional photoelastic technique. The experimental samples consisted of 60 blocks of PSM-1 photoelastic material measuring 1" by 1" by 1/4". The samples were divided into six groups of 10 blocks each, with each group representing one of the pins used in the study. Pins were inserted and cores of amalgam and composite were fabricated over the pins. The samples were observed in the polariscope and photographed after pin insertion and after loading the cores with a constant, compressive force of 20 pounds. Using magnification, fringe orders were counted and rounded to the highest 0.5 fringe order. Each sample was evaluated for apical and shoulder stress. All statistical analyses were done using ANOVA at the P = 0.05 significance level. It was concluded from this study that the insertion of self-threading retention pins results in stress at the apical and shoulder areas of the pin. Pin design features, such as shoulder stops, significantly affect the magnitude and location of stress. There were no significant differences in either the apical or shoulder stresses induced when cores were made of either amalgam or composite resin.

UR - http://www.scopus.com/inward/record.url?scp=0027700192&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027700192&partnerID=8YFLogxK

M3 - Article

VL - 18

SP - 218

EP - 223

JO - Operative Dentistry

JF - Operative Dentistry

SN - 0361-7734

IS - 6

ER -