The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지
DOI QR코드

DOI QR Code

A study on the changes in attractive force of magnetic attachments for overdenture

  • Leem, Han-Wool (Department of Prosthodontics, College of Dentistry, Dankook University) ;
  • Cho, In-Ho (Department of Prosthodontics, College of Dentistry, Dankook University) ;
  • Lee, Jong-Hyuk (Department of Prosthodontics, College of Dentistry, Dankook University) ;
  • Choi, Yu-Sung (Department of Prosthodontics, College of Dentistry, Dankook University)
  • Received : 2015.06.05
  • Accepted : 2015.11.13
  • Published : 2016.02.29
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSE. Although magnetic attachment is used frequently for overdenture, it is reported that attractive force can be decreased by abrasion and corrosion. The purpose of this study was to establish the clinical basis about considerations and long term prognosis of overdenture using magnetic attachments by investigating the change in attractive force of magnetic attachment applied to the patients. MATERIALS AND METHODS. Among the patients treated with overdenture using magnetic attachments in Dankook University Dental Hospital, attractive force records of 61 magnetic attachments of 20 subjects who re-visited from July 2013 to June 2014 were analyzed. Dental magnet tester (Aichi Micro Intelligent Co., Aichi, Japan) was used for measurement. The magnetic attachments used in this study were Magfit IP-B Flat, Magfit DX400, Magfit DX600 and Magfit DX800 (Aichi Steel Co., Aichi, Japan) filled with Neodymium (NdFeB), a rare-earth magnet. RESULTS. Reduction ratio of attractive force had no significant correlation with conditional variables to which attachments were applied, and was higher when the maintenance period was longer (P<.05, r=.361). Reduction ratio of attractive force was significantly higher in the subject group in which attachments were used over 9 years than within 9 years (P<.05). Furthermore, 16.39% of total magnetic attachments showed detachment of keeper or assembly. CONCLUSION. Attractive force of magnetic attachment is maintained regardless of conditional variables and reduction ratio increased as the maintenance period became longer. Further study on adhesive material, attachment method and design improvement to prevent detachment of magnetic attachment is needed.

Keywords

References

  1. Haraldson T, Karlsson U, Carlsson GE. Bite force and oral function in complete denture wearers. J Oral Rehabil 1979;6: 41-8. https://doi.org/10.1111/j.1365-2842.1979.tb00403.x
  2. Osterberg T, Carlsson GE. Symptoms and signs of mandibular dysfunction in 70-year-old men and women in Gothenburg, Sweden. Community Dent Oral Epidemiol 1979;7:315-21. https://doi.org/10.1111/j.1600-0528.1979.tb01240.x
  3. Ellis JS1, Pelekis ND, Thomason JM. Conventional rehabilitation of edentulous patients: the impact on oral health-related quality of life and patient satisfaction. J Prosthodont 2007;16:37-42. https://doi.org/10.1111/j.1532-849X.2006.00152.x
  4. Turkyilmaz I, Company AM, McGlumphy EA. Should edentulous patients be constrained to removable complete dentures? The use of dental implants to improve the quality of life for edentulous patients. Gerodontology 2010;27:3-10. https://doi.org/10.1111/j.1741-2358.2009.00294.x
  5. Miller PA. Complete dentures supported by natural teeth. J Prosthet Dent 1958;8:924-8. https://doi.org/10.1016/0022-3913(58)90122-7
  6. Morrow RM, Feldmann EE, Rudd KD, Trovillion HM. Tooth-supported complete dentures: an approach to preventive prosthodontics. J Prosthet Dent 1969;21:513-22. https://doi.org/10.1016/0022-3913(69)90073-0
  7. Lord JL, Teel S. The overdenture: patient selection, use of copings, and follow-up evaluation. J Prosthet Dent 1974;32: 41-51. https://doi.org/10.1016/0022-3913(74)90097-3
  8. Morrow RM, Powell JM, Jameson WS, Jewson LG, Rudd KD. Tooth-supported complete dentures: description and clinical evaluation of a simplified technique. J Prosthet Dent 1969; 22:415-24.
  9. Dodge CA. Prevention of complete denture problems by use of “overdentures”. J Prosthet Dent 1973;30:403-11. https://doi.org/10.1016/0022-3913(73)90161-3
  10. Ettinger RL, Taylor TD, Scandrett FR. Treatment needs of overdenture patients in a longitudinal study: five-year results. J Prosthet Dent 1984;52:532-7. https://doi.org/10.1016/0022-3913(84)90340-8
  11. Parel SM. Implants and overdentures: the osseointegrated approach with conventional and compromised applications. Int J Oral Maxillofac Implants 1986;1:93-9.
  12. Crum RJ, Rooney GE Jr. Alveolar bone loss in overdentures: a 5-year study. J Prosthet Dent 1978;40:610-3. https://doi.org/10.1016/0022-3913(78)90054-9
  13. Rissin L, House JE, Manly RS, Kapur KK. Clinical comparison of masticatory performance and electromyographic activity of patients with complete dentures, overdentures, and natural teeth. J Prosthet Dent 1978;39:508-11. https://doi.org/10.1016/S0022-3913(78)80181-4
  14. Reitz PV, Weiner MG, Levin B. An overdenture survey: preliminary report. J Prosthet Dent 1977;37:246-58. https://doi.org/10.1016/0022-3913(77)90066-X
  15. Fenton AH, Hahn N. Tissue response to overdenture therapy. J Prosthet Dent 1978;40:492-8. https://doi.org/10.1016/0022-3913(78)90079-3
  16. Thayer HH, Caputo AA. Photoelastic stess analysis of overdenture attachments. J Prosthet Dent 1980;43:611-7. https://doi.org/10.1016/0022-3913(80)90374-1
  17. Stansbury BE. A retentive attachment for overdentures. J Prosthet Dent 1976;35:228-30. https://doi.org/10.1016/0022-3913(76)90284-5
  18. Quinlivan JT. An attachment for overlay dentures. J Prosthet Dent 1974;32:256-61. https://doi.org/10.1016/0022-3913(74)90027-4
  19. Khoo HD, Chai J, Chow TW. Prosthetic outcome, patient complaints, and nutritional effects on elderly patients with magnet-retained, implant-supported overdentures-a 1-year report. Int J Oral Maxillofac Implants 2013;28:1278-85. https://doi.org/10.11607/jomi.2724
  20. Gillings BR. Magnetic retention for complete and partial overdentures. Part I. J Prosthet Dent 1981;45:484-91. https://doi.org/10.1016/0022-3913(81)90032-9
  21. Taira Y, Hai K, Matsumura H, Atsuta M. Adhesive bonding of titanium nitride-plated stainless steel for magnetic attachments. Eur J Oral Sci 2001;109:204-7. https://doi.org/10.1034/j.1600-0722.2001.00023.x
  22. Gillings BR. Magnetic retention for overdentures. Part II. J Prosthet Dent 1983;49:607-18. https://doi.org/10.1016/0022-3913(83)90382-7
  23. Naert I, Quirynen M, Theuniers G, van Steenberghe D. Prosthetic aspects of osseointegrated fixtures supporting overdentures. A 4-year report. J Prosthet Dent 1991;65:671-80. https://doi.org/10.1016/0022-3913(91)90205-B
  24. Riley MA, Williams AJ, Speight JD, Walmsley AD, Harris IR. Investigations into the failure of dental magnets. Int J Prosthodont 1999;12:249-54.
  25. Naert I, Alsaadi G, Quirynen M. Prosthetic aspects and patient satisfaction with two-implant-retained mandibular overdentures: a 10-year randomized clinical study. Int J Prosthodont 2004;17:401-10.
  26. Behrman SJ, Egan GF. The implantation of magnets in the jaw to aid denture retention : An original brief research report. New York State Dent J 1953;19:353-71.
  27. Freedman H. Magnets to stabilize dentures. J Am Dent Assoc 1953;47:288-97. https://doi.org/10.14219/jada.archive.1953.0172
  28. Winkler S, Pearson MH. The effectiveness of embedded magnets in complete dentures during speech and mastication: a cineradiographic study. Dent Dig 1967;73:118-9.
  29. Boucher LJ, Heupel EM. Prosthetic restoration of a maxilla and associated structures. J Prosthet Dent 1966;16:154-68. https://doi.org/10.1016/0022-3913(66)90124-7
  30. Javid N. The use of magnets in a maxillofacial prosthesis. J Prosthet Dent 1971;25:334-41. https://doi.org/10.1016/0022-3913(71)90196-X
  31. Naert IE, Gizani S, Vuylsteke M, van Steenberghe D. A randomised clinical trial on the influence of splinted and unsplinted oral implants in mandibular overdenture therapy. A 3-year report. Clin Oral Investig 1997;1:81-8. https://doi.org/10.1007/s007840050016
  32. Burns DR, Unger JW, Elswick RK Jr, Giglio JA. Prospective clinical evaluation of mandibular implant overdentures: Part II--Patient satisfaction and preference. J Prosthet Dent 1995; 73:364-9. https://doi.org/10.1016/S0022-3913(05)80332-4
  33. Setz JM, Wright PS, Ferman AM. Effects of attachment type on the mobility of implant-stabilized overdentures--an in vitro study. Int J Prosthodont 2000;13:494-9.
  34. Thean HP, Khor SK, Loh PL. Viability of magnetic denture retainers: a 3-year case report. Quintessence Int 2001;32:517-20.

Cited by

  1. Corrosion behaviours of the dental magnetic keeper complexes made by different alloys and methods vol.8, pp.3, 2016, https://doi.org/10.1038/ijos.2016.21
  2. Comparison of Three Different Types of Two-Implant-Supported Magnetic Attachments on the Stress Distribution in Edentulous Mandible vol.2019, pp.None, 2016, https://doi.org/10.1155/2019/6839517
  3. Oral rehabilitation of a cleft palate patient with tooth-supported, telescopic magnetic overdenture vol.13, pp.11, 2020, https://doi.org/10.1136/bcr-2019-233777
  4. Influence of marginal bone resorption on two mini implant-retained mandibular overdenture: An in vitro study vol.13, pp.1, 2016, https://doi.org/10.4047/jap.2021.13.1.55