The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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THE COMPARISON OF INITIAL RETENTIVE FORCE IN DIFFERENT DOUBLE CROWN SYSTEMS

  • Kwon, Ho-Beom (Department of Prosthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Roh, Yoon-Ho (Department of Prosthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Lee, Seok-Hyung (Department of Prosthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • Published : 2006.12.31
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Abstract

Statement of problem. Various double crown systems have been used with removable partial dentures in the clinical field. Although retentive force between inner and outer crown are affected by several factors, differences between the retentive forces of different double crown system types are expected. Purpose. The purpose of this study was to evaluate the initial retentive force of outer crowns fabricated by the conventional casting technique in conus and hybrid double crowns. Material and methods. Ten double crowns were fabricated. The groups were as follows. Group 1, double crowns of hybrid inner and outer crowns using the conventional casting method; Group 2, double crowns of conus inner and outer crowns using the conventional casting method. Tensile strengths of double crowns when the inner and outer crowns were separated on a universal testing machine were measured. These values of retentive force were then statistically analyzed using the Kruskal-Wallis test. Results. Retentive force in group 2 was significantly higher than that in group 1(p<.05). Conclusion. The initial retentive forces of double crowns were affected by the types of the double crown system.

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References

  1. Muehlemann HR, Savdir S, Rateitschak KH. Tooth Mobility--Its Causes and Significance. J Periodontol 1965;36:148-153 https://doi.org/10.1902/jop.1965.36.2.148
  2. Carlsson GE, Hedegard B, Koivumaa KK. Studies in partial dental prosthesis, III. A longitudinal study of mandibular partial dentures with double extension saddles. Acta Odontol Scand 1962;20:95-119 https://doi.org/10.3109/00016356209026098
  3. Wenz Hj, Hertrampf K, Lehmann KM. Clinical longevity of removable partial dentures retained by telescopic crowns: outcome of the double crown with clearance fit. Int J Prosthodont 2001:14:207-213
  4. Beschnidt SM, Chitmongkolsuk S, Prull R Telescopic crown-retained removable partial dentures: reviews and case report. Compend Contin Educ Dent 2001;22:927-940
  5. Langer A. Telescope retainers and their clinical application. J Prosthet Dent 1980;44:516-522 https://doi.org/10.1016/0022-3913(80)90070-0
  6. Widbom T, Lofquist L, Widbom C, Soderfeldt B, Kronstrom M. Tooth-supported telescopic crownretained dentures: an up to 9-year retrospective clinical follow-up study. Int J Prosthodont 2004;17:29-34
  7. Ericson A, Nilsson B, Bergman B. Clinical results in patients provided with conical crown retained dentures. Int J Prosthodont 1990;3:513-521
  8. Molin M, Bergman B, Ericson A. A clinical evaluation of conical crown retained dentures. J Prosthet Dent 1993;70:251-256 https://doi.org/10.1016/0022-3913(93)90060-2
  9. Igarashi Y, Goto T. Ten-year follow-up study of conical crown-retained dentures. Int J Prosthodont 1997;10:149-155
  10. Minagi S, Natsuaki N, Nishigawa G, Sato T. New telescopic crown design for removable partial dentures. J Prosthet Dent 1999;81:684-688 https://doi.org/10.1016/S0022-3913(99)70107-1
  11. Pezzoli M, Rossetto M, Calderale PM. Evaluation of load transmission by distal-extension removable partial dentures by using reflection photoelasticity. J Prosthet Dent 1986;56:329-337
  12. Isaacson GO. Telescope crown retainers for removable partial dentures. J Prosthet Dent 1969; 22:436-448 https://doi.org/10.1016/0022-3913(69)90211-X
  13. Langer Y, Langer A. Tooth-supported telescopic prostheses in compromised dentitions: a clinical report. J Prosthet Dent 2000;84:129-132 https://doi.org/10.1067/mpr.2000.108026
  14. Langer A. Telescope retainers for removable partial dentures. J Prosthet Dent 1981;45:37-43 https://doi.org/10.1016/0022-3913(81)90009-3
  15. Ohkawa S, Okane H, Nagasawa T, Tsuru H. Changes in retention of various telescope crown assemblies over long-term use. J Prosthet Dent. 1990;64:153-158 https://doi.org/10.1016/0022-3913(90)90170-H
  16. Gungor MA, Artunc C, Sonugelen M. Parameters affecting retentive force of conus crowns. J Oral RehabiL 2004;31:271-277 https://doi.org/10.1111/j.1365-2842.2004.01036.x
  17. Preiskel HW. Telescopic prostheses. Precision attachment on overdenture prostheses. St. Louis: Quiteseence publications; 1985:307-328
  18. Lee MW, Baum L, Pence B Sr, Herrerra W. 0ring coping attachments for removable partial denture. J Prothet Dent 1995;74:235-241 https://doi.org/10.1016/S0022-3913(05)80129-5