The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Effects of type of magnet attachment and implant angulation in two implant overdenture models

  • Song, So-Yeon (Department of Biomedical Science, Graduate School of Korea University, Institute for Clinical Dental Research, Korea University Medical Center) ;
  • Kang, Kyeong-Hwan (Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Korea University) ;
  • Lee, Jeong-Yol (Institute for Clinical Dental Research, Guro Hospital, Korea University Medical Center) ;
  • Shin, Sang-Wan (Institute for Clinical Dental Research, Korea University Medical Center)
  • Received : 2019.11.06
  • Accepted : 2020.01.23
  • Published : 2020.02.28
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Abstract

PURPOSE. The purpose of this study is to evaluate the effects of type of magnet attachment and implant angulation in two implant overdenture models. MATERIALS AND METHODS. Magnet attachments used in this study were flat and dome types (MGT5515, MGT5520D, Dentium Co., Seoul, Korea). Two implants with keepers were inserted in the resin blocks at a distance of 24 mm. For the first model, the implants were parallel to the vertical and perpendicular to the horizontal; for the second model, both were angulated 5 degrees to the mesial; for the third model, both were angulated 10 degrees toward the mesial. The retentive force was measured in both vertical and lateral directions. Statistical analyses were performed using SPSS software version 22.0 (α=.05). RESULTS. The flat type magnet attachment showed the highest lateral retentive force in the 20° divergent group (P<.05) and the dome type magnet attachment showed the highest lateral retentive force in the parallel group (P<.05). The vertical and lateral retentive force of the dome type magnet attachment was greater than that of the flat type magnet attachment in every direction (P<.05). CONCLUSION. Within the limitations of this study, the dome shape magnet attachment can resist vertical and lateral retentive force more superiorly than the flat type magnet attachment, regardless of angle, in the mandibular two implant model.

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References

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