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Path generator control system and virtual compliance calculator for maxillofacial massage robots

  • Hiroyuki Ishii
  • Hiroki Koga
  • Yuichi Obokawa
  • Jorge Solis
  • Atsuo Takanishi
  • Akitoshi Katsumata
Original Article

Abstract

Purpose

Oral disorders such as temporomandibular joint disorders (TMD) and dry mouth are common and often require treatment. Maxillofacial massage is used as a complementary and alternative therapy for these disorders. We developed an oral rehabilitation robot that massages the maxillofacial tissues for this purpose. In this paper, we propose a control system for oral rehabilitation robots.

Method

The control system consists of a massage path generator, virtual compliance calculator, and inverse kinematics calculator. The massage path generator computes a target massage path based on a human head model obtained from a reference MRI image of an adult male. The head model includes the shape and elastic modulus of each component, all of which were obtained experimentally. Virtual compliance control is used to control manipulators with position servo actuators. The manipulators, which have a force sensor at their end-effectors, move actively in the direction of the external force applied to their sensors via virtual compliance control. We implemented this control in WAO-1, our first prototype oral rehabilitation robot.

Results

WAO-1 provided massage to three adult male subjects with and without virtual compliance control. One of the subjects was the adult male whose MRI image was used to synthesize the head model in the massage path generator. Without virtual compliance control, the actual massage force was greater than the target massage force, while that with virtual compliance control was less than the target massage force. Furthermore, with virtual compliance control, the massage paths conformed to the head shape of each patient.

Conclusion

Implementation of virtual compliance control in the WAO-1 massage robot is feasible and useful for implementation of safe and potentially effective maxillofacial massage therapy.

Keywords

Rehabilitation robot Maxillofacial massage TMD Drymouth Force control Robotic manipulator 

References

  1. 1.
    NIH (2006) US Department of Health and Human Services, TMJ Disorders. NIH Publication No. 06-3487Google Scholar
  2. 2.
    Haskin CL, Milam SB, Cameron IL (1995) Pathogenesis of degenerative joint disease in the human temporomandibular joint. Critical reviews in oral biology and medicine. an official publication of the American Association of Oral Biologists. Crit Rev Oral Biol Med 6(3): 248–277CrossRefPubMedGoogle Scholar
  3. 3.
    Westesson PL (1993) Reliability and validity of imaging diagnosis of temporomandibular joint disorder. Adv Dental Res 7(2): 137–151Google Scholar
  4. 4.
    NIH (2006) US Department of Health and Human Services, Dry mouth. NIH Publication No. 06-3174Google Scholar
  5. 5.
    Field EA, Fear S, Higham SM, Ireland RS, Rostron J, Willetts RM, Longman LP (2001) Age and medication are significant risk factors for xerostomia in an English population, attending general dental practice. Gerodontology 18(1): 21–24CrossRefPubMedGoogle Scholar
  6. 6.
    Nederfors T (2000) Xerostomia and hyposalivation. Adv Dental Res 14(1): 48–56CrossRefGoogle Scholar
  7. 7.
    Billings RJ, Proskin HM, Moss ME (1996) Xerostomia and associated factors in a community-dwelling adult population. Commun Dent Oral Epidemiol 24(5): 312–316CrossRefGoogle Scholar
  8. 8.
    DeBar LL, Vuckovic N, Schneider J, Ritenbaugh C (2003) Use of complementary and alternative medicine for temporomandibular disorders. J Orofac Pain 17(3): 224–236PubMedGoogle Scholar
  9. 9.
    Capellini VK, Souza GS, Faria CRS (2006) Massage therapy in the management of myogenic TMD: a pilot study. J Appl Oral Sci 14(1): 21–26CrossRefPubMedGoogle Scholar
  10. 10.
    Panya M, Miyoshi T, Terashima K, Kitagawa H (2003) Expert massage motion control by multi-fingered robot hand. In: Proceedings of the 2003 IEEE/RSJ international conference on intelligent robots and systems, vol 3. pp 3035–3040Google Scholar
  11. 11.
    Chul-goo K, Bong-ju L, Ik-xu S, Ho-yeon K (2007) Design of a percussive massage robot tapping human backs. In: Proceedings of the 16th IEEE international symposium on robot and human interactive communication, pp 962–967Google Scholar
  12. 12.
    Koga H, Usuda Y, Matsuno M, Ogura Y, Ishii H, Solis J, Takanishi A, Katsumata A (2007) Development of oral rehabilitation robot for massage therapy. In: Proceedings of the international special topic conference on information technology in biomedicine, pp 111–114Google Scholar
  13. 13.
    Koga H, Usuda Y, Matsuno M, Ogura Y, Ishii H, Solis J, Takanishi A, Katsumata A (2008) Development of the oral rehabilitation robot WAO-1. In: Proceedings of the 2nd biennial IEEE/ RAS-EMBS international conference on biomedical robotics and biomechatronicsGoogle Scholar
  14. 14.
    Salisbury JK (1980) Active stiffness control of a manipulator in cartesian coordinates. In: Proceedings of the 19th IEEE conference on decision and control, pp 95–100Google Scholar
  15. 15.
    Sugahara Y, Hosobata T, Mikuriya Y, Lim H, Takanishi A (2003) Realization of stable dynamic walking by a parallel bipedal locomotor on uneven terrain using a virtual compliance control. In: Proceedings of the 2003 IEEE/RSJ international conference on intelligent robots and systems, pp 595–600Google Scholar

Copyright information

© CARS 2009

Authors and Affiliations

  • Hiroyuki Ishii
    • 1
  • Hiroki Koga
    • 2
  • Yuichi Obokawa
    • 2
  • Jorge Solis
    • 2
  • Atsuo Takanishi
    • 2
    • 3
  • Akitoshi Katsumata
    • 4
  1. 1.Institute for Biomedical EngineeringWaseda UniversityTokyoJapan
  2. 2.Faculty of Science and EngineeringWaseda UniversityTokyoJapan
  3. 3.Humanoid Research InstituteWaseda UniversityTokyoJapan
  4. 4.Department of Oral RadiologyAsahi UniversityGifuJapan

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