The Journal of Contemporary Dental Practice

Register      Login



Volume / Issue

Online First

Related articles

VOLUME 20 , ISSUE 6 ( June, 2019 ) > List of Articles


A Comparison of Thermal Changes among Four Different Interproximal Reduction Systems in Orthodontics

Amina Balla AL-Hassan Omer, Jamal Al Sanea

Keywords : Interproximal reduction, Orthodontic correction, Tooth

Citation Information : Omer AB, Sanea JA. A Comparison of Thermal Changes among Four Different Interproximal Reduction Systems in Orthodontics. J Contemp Dent Pract 2019; 20 (6):738-742.

DOI: 10.5005/jp-journals-10024-2589

License: CC BY-NC 4.0

Published Online: 01-06-2019

Copyright Statement:  Copyright © 2019; Jaypee Brothers Medical Publishers (P) Ltd.


Introduction: Interproximal enamel stripping is routinely used in orthodontics, different methods were utilized by clinicians to reduce the width of teeth but no previous study addressed the factors affecting the thermal safety of such systems on the dental pulp. Aim: The present study was conducted to measure thermal changes among four different interproximal reduction (IPR) systems in orthodontics. Materials and methods: A total of 130 extracted human premolar teeth were used in this study. Teeth were distributed into three experimental groups each having three subgroups and one control group. Thus, a total of 10 subgroups were created of 13 teeth each. Stripping procedures were performed using four diamond tools (burs, discs, saw, and manual strip) with different speed setup, with and without a coolant for the higher speed setup for each tool. A K-type thermocouple wire was positioned in the center of the pulp chamber and was connected to a data logger during the application of stripping procedures. Data were analyzed by the Krushkal–Wallis test using the SPSS PC+ version 21.0 statistical software. Results: There was a highly statistically significant difference in the mean ranks of temperature values among the four groups with different speed levels. Among the 10 subgroups, the higher change in temperature registered was in the bur and disc groups when operated with the highest recommended speed without a coolant. The change in temperature was statistically significantly higher than the temperature values of other groups (p < 0.001). All recorded temperatures were below the critical temperature (5.5 °C) registered. Conclusion: Based on the results of this study, IPR is a safe procedure on the dental pulp for the teeth with a medium dentin thickness with or without a coolant.

PDF Share
  1. Arman A, Ozel E, et al. Qualitative and quantitative evaluation of enamel after various stripping methods. Am J Orthod Dentofacial Orthop 2006;130(131):7–14. DOI: 10.1016/j.ajodo.2006.01.021.
  2. Danesh GHA, Lippold C, et al. Enamel surfaces following interproximal reduction with different methods. Angle Orthod 2007;77:1004–1010. DOI: 10.2319/041806-165.1.
  3. Twesme DA, Firestone AR, et al. Air-rotor stripping and enamel demineralization in vitro. Am J Orthod Dentofacial Orthop 1994;105(2):142–152. DOI: 10.1016/S0889-5406(94)70110-5.
  4. Zach L, Cohen G. Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol 1965;19:515–530.
  5. Baysal A. Temperature rise in the pulp chamber during different stripping procedures. Angle Orthod 2007;77(3):478–482. DOI: 10.2319/0003-3219(2007)077[0478:TRITPC]2.0.CO;2.
  6. Ottl PLH. Temperature response in the pulpal chamber during ultrahigh-speed tooth preparation with diamond burs of different grit. J Prosthet Dent 1998;80:12–19.
  7. Watson TF, Flanagan D, et al. High and low torque handpieces: cutting dynamics, enamel cracking and tooth temperature. Br Dent J 2000;188:680–668.
  8. Ozturk B. In vitro assessment of temperature change in the pulp chamber during cavity preparation. J Prosthet Dent 2004;91(5):436–
  9. DOI: 10.1016/S0022391304001131.
  10. Cavalcanti BN, Rode SM. High speed cavity preparation techniques with different water flows. J Prosthet Dent 2002;87:158–161.
  11. Hatton JF, Holtzmann DJ, et al. Effect of handpiece pressure and speed on intrapulpal temperature rise. Am J Dent 1994;7:108–110.
  12. Dyson JE, Darvell BW. Dental air turbine handpiece performance testing. Aust Dent J 1995;40(5):330–338.
  13. Bhandary NDA, Shetty YB. High speed handpieces. J Int Oral Health 2014;6(1):130–132.
  14. Pereira JC. Change in the pulp chamber temperature with different stripping techniques. Prog Orthod 2014;15:55. DOI: 10.1186/s40510- 014-0055-8.
  15. Zachrisson BU. Zachrisson on excellence finishing. Part I. J Clin Orthod 1986;20:460–482.
  16. Sheridan JJ, Ledoux PM. Air roto stripping and proximal sealants: an SEM evaluation. J Clin Orthod 1989;23:790–794.
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.