International Journal of Prosthodontics and Restorative Dentistry

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VOLUME 2 , ISSUE 3 ( July-September, 2012 ) > List of Articles

RESEARCH ARTICLE

Clinical Evaluation of Dental Metal Hazards and Therapeutic Effects of Shortwave Diathermy in Dental Medicine

Chisato Mukai, Tetsuji Nakamoto, Yusuke Kondo, Chihiro Masaki, Atsumi Ohta, Ryuji Hosokawa

Citation Information : Mukai C, Nakamoto T, Kondo Y, Masaki C, Ohta A, Hosokawa R. Clinical Evaluation of Dental Metal Hazards and Therapeutic Effects of Shortwave Diathermy in Dental Medicine. Int J Prosthodont Restor Dent 2012; 2 (3):88-95.

DOI: 10.5005/jp-journals-10019-1055

Published Online: 01-09-2012

Copyright Statement:  Copyright © 2012; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Objective

Shortwave diathermy causes increase in temperature from deep inside the body, results in upregulation of metabolism, and has analgesic effects. In this study, we explored the potential application of shortwave diathermy in the maxillofacial region by monitoring internal and external temperature changes, changes in blood flow, and resting saliva secretion under shortwave diathermy for subjects with and without dental metal restorations (MR) to confirm the safety and the limitation of shortwave diathermy for dental medicine.

Materials and methods

Twenty young healthy subjects were recruited (10 subjects with MR and 10 subjects without MR). Shortwave exposure was achieved with condenser-type probes placed on the bilateral mandibular angles, and the intraoral temperature was monitored. For functional analysis, unstimulated whole saliva before and after exposure was collected. The temperature and blood flow distributions of the exposed areas were then monitored by thermography and twodimensional (2D) laser Doppler flowmetry.

Results

Shortwave exposure for 20 minutes induced significant temperature increases in all groups (p ≤ 0.05). The subjects reported no discomfort. When subjects without MR held gold or titanium crowns in their mouths, the thermal effect by shortwave diathermy was reduced. Resting saliva upon exposure only increased significantly in metal-free subjects, and amylase concentration was also increased, but the level of the salivary stress biomarker chromogranin A was unchanged. Furthermore, thermography showed that shortwave diathermy significantly increased the surface temperature for cheek skin and the buccal mucosa; however, this increase failed to elevate surface blood flow.

Conclusion

Shortwave diathermy induces temperature increases in the maxillofacial region. MR did not cause excessive heating, on the contrary, reduce the thermal effect of shortwave radiation. The temperature rise maintains upregulation in salivary function, which could be utilized safely in dental medicine.

How to cite this article

Mukai C, Nakamoto T, Kondo Y, Masaki C, Ohta A, Hosokawa R. Clinical Evaluation of Dental Metal Hazards and Therapeutic Effects of Shortwave Diathermy in Dental Medicine. Int J Prosthodont Restor Dent 2012;2(3): 88-95.


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  1. Can the use of physical modalities for pain control be rationalized by the research evidence? J Physiol Pharmacol 1991;69:704-12.
  2. Management of chronic pelvic inflammatory disease with shortwave diathermy. A case report. Phys Ther 1988;68:1541-45.
  3. Pulsed electromagnetic (short-wave) energy therapy. Br J Sports Med 1989;23:213-16.
  4. Pulsed shortwave diathermy and prolonged long-duration stretching increase dorsiflexion range of motion more than identical stretching without diathermy. J Athl Train 2002;37:43-50.
  5. Temperature change in human muscle during and after pulsed short-wave diathermy. J Orthop Sports Phys Ther 19992913-18. discussion 19-22.
  6. Changes in blood flow, oxygen uptake and tissue temperatures produced by therapeutic physical agents. II. Effect of short-wave diathermy. Am J Phys Med 1960;39:87-95.
  7. Short wave diathermy in the symptomatic management of chronic pelvic inflammatory disease pain: A randomized controlled trial. Physiother Res Int 2010;16:50-56.
  8. The effects of physiotherapy on osteoarthritic knees of females. J Formos Med Assoc 1991;90:1008-13.
  9. The effect of local heat and cold therapy on the intra-articular and skin surface temperature of the knee. Arthritis Rheum 1992;35:146-51.
  10. Use of pulsed shortwave diathermy and joint mobilization to increase ankle range of motion in the presence of surgical implanted metal: A case series. J Orthop Sports Phys Ther 2006;36:669-77
  11. Determinants of salivary alpha-amylase in humans and methodological considerations. Psychoneuroendocrinology 2009;34:469-85.
  12. Hot-pack and 1-MHz ultrasound treatments have an additive effect on muscle temperature increase. J Athl Train 1998;33:21-24.
  13. Heat distribution in the lower leg from pulsed short-wave diathermy and ultrasound treatments. J Athl Train 2000;35:50-55.
  14. The carry-over effects of diathermy and stretching in developing hamstring flexibility. J Athl Train 2002;37:37-42.
  15. Effect of therapeutic temperatures on tendon extensibility. Arch Phys Med Rehabil 1970;51:481-87.
  16. Clinical measurement of range of motion. Review of goniometry emphasizing reliability and validity. Phys Ther 1987;67:1867-72.
  17. Therapy interventions for improving joint range of motion: A systematic review. J Hand Ther 2004;17:118-31.
  18. Goniometric reliability in a clinical setting. Elbow and knee measurements. Phys Ther 1983;63:1611-15.
  19. Effects of continuous and pulsed microwave irradiation on distribution of heat in the gluteal region of minipigs. A comparative study. Scand J Rehabil Med 1989;21:59-62.
  20. Effects of selective blood and tissue heating on blood flow in the dog hindlimb. Exp Physiol 1990;75:359-66.
  21. Heating rabbit joint by microwave applicator. Arch Phys Med Rehabil 1987;68: 710-12.
  22. Performance evaluation of salivary amylase activity monitor. Biosens Bioelectron 2004;20:491-97.
  23. Circadian rhythm of human salivary chromogranin A. Biomed Res 2007;28:57-60.
  24. Salivary cortisol: A better measure of adrenal cortical function than serum cortisol. Ann Clin Biochem 1983;20 (Pt 6):329-35.
  25. Stress responses of neonates related to maternal characteristics. Yonsei Med J 2011;52:98-103.
  26. Evaluation of kallikrein in human parotid and submandibular saliva. Arch Oral Biol 1986;31:627-28.
  27. Relationship between symptoms of dryness and moisture levels in patients with maxillofacial prostheses. J Prosthodont Res 2010;54:65-69.
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