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Fracture Resistance of Immature Permanent Incisors using a Pendulum Impact Device

Draney, Jonathan W
http://rave.ohiolink.edu/etdc/view?acc_num=osu1371799072

Abstract Details

2013, Master of Science, Ohio State University, Dentistry.
Introduction: Traumatic injuries to immature permanent teeth that lead to pulpal necrosis present a unique clinical challenge. These teeth are left with thin root walls which are susceptible to fracture. Attempts to fortify these roots include obturation with restorative materials or regenerative endodontics. The fracture resistance of teeth has been studied extensively in vitro using materials such as composite resin, RMGI or posts. Previous studies have utilized low-impact, continuous force testing machines such as the Instron which do not simulate traumatic blows to the mouth. Our study used a pendulum impact test, the Izod, to more accurately simulate the force absorbed by traumatically injured teeth. Methods: 120 extracted human incisors were randomly divided into 6 groups: Negative (unaltered) control, Positive (instrumented) control, Fiber post, Composite Resin, Unaltered Mouth guard and Instrumented mouth guard. Teeth were fractured using an Izod pendulum impact device; kinetic energy absorbed and mode of failure were recorded. One-way ANOVA statistical analysis and Fisher’s exact tests were performed. Results: Un-instrumented mouth guard teeth absorbed a significantly more kinetic energy than all other groups. Fiber post and instrumented mouth guard groups absorbed significantly more kinetic energy than both the composite resin and instrumented control groups. A significant difference in failure modes was observed between control groups. Fiber post teeth had a similar mode of failure to unaltered control teeth. Conclusions: 1. Mouth guard material significantly increases resistance to fracture in instrumented and un-instrumented teeth. 2. Fiber posts significantly increase fracture resistance of weakened teeth in vitro and create a more favorable mode of failure. 3. Composite resin did not increase resistance to fracture. Our data do not support composite monoblock for acute trauma.
Dennis McTigue, DDS, MS (Advisor)
Robert Seghi, DDS, MS (Committee Member)
Sarath Thikkurissy, DDS, MS (Committee Member)
37 p.
Dentistry

Recommended Citations

Citations

  • Draney, J. W. (2013). Fracture Resistance of Immature Permanent Incisors using a Pendulum Impact Device [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1371799072

    APA Style (7th edition)

  • Draney, Jonathan. Fracture Resistance of Immature Permanent Incisors using a Pendulum Impact Device. 2013. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1371799072.

    MLA Style (8th edition)

  • Draney, Jonathan. "Fracture Resistance of Immature Permanent Incisors using a Pendulum Impact Device." Master's thesis, Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1371799072

    Chicago Manual of Style (17th edition)

osu1371799072
730
© 2013, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.