The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

COMPARATIVE STUDIES OF RETENTIVE FORCES IN MAXILLARY OVERDENTURE BAR ATTACHMENTS

상악 임플랜트 Overdenture에서 Bar Attachment 설계에 따른 유지력 변화에 관한 연구

  • Son Cha-Young (Department of Prosthodontics, College of Dentistry, Busan National University) ;
  • Jeong Chang-Mo (Department of Prosthodontics, College of Dentistry, Busan National University) ;
  • Jeon Young-Chan (Department of Prosthodontics, College of Dentistry, Busan National University) ;
  • Lim Jang-Seop (Department of Prosthodontics, College of Dentistry, Busan National University) ;
  • Jeong Hee-Chan (Department of Prosthodontics, College of Dentistry, Busan National University)
  • 손차영 (부산대학교 치과대학 치과보철학교실) ;
  • 정창모 (부산대학교 치과대학 치과보철학교실) ;
  • 전영찬 (부산대학교 치과대학 치과보철학교실) ;
  • 임장섭 (부산대학교 치과대학 치과보철학교실) ;
  • 정희찬 (부산대학교 치과대학 치과보철학교실)
  • Published : 2005.10.01
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Abstract

Statement of problem: It could be hypothesised that attachments, which provide more retention against vortical and horizontal dislodgement, will be associated with more favorable parameters of oral function. Purpose: This study was to provide data of initial retentive force and retention loss of different bar attachment systems recommended for use with maxillary implant overdentures. Material and method: 4 implants were placed in the anterior region of edentulous maxilla, five different systems of bar attachment were fabricated as follows: cantilevered Hader bar using clips (Type 1), Hader bar using clips without cantilever (Type 2), Hader bar using clip and ERA attachment orange male (Type 3), Hader bar using clip and ERA attachment white male (Type 4), and Bar using magnets (Type 5). Each samples were placed in the universal testing machine for determination of retentive forces(at initial and after every 200 cycles up to 1,000 cycles). Results and Conclusion 1. Attachment type 1 showed the biggest initial retentive force followed by type 3, type 2, type 4, and lastly type 5(P<0.001). 2. After 1,000 cycles of repeated removals of attachments, significant loss of retentive forces was taken place except for attachment type 5. 3. After 1,000 cycles of repeated removals, the loss of retentive force between type 1 and type 2, which used Hader bar and clip attachments. was greater in type 1 that had wider clip formation. And between type 3 and type 4, which used ERA attachments, the loss of retentive force was greater in type 4 that had white male attached (P<0.001). 4. After 1.000 cycles of repeated removals, attachment type 3 showed the biggest retentive force followed by type 2, type 4, type 1 and lastly type. 5. There was no significant difference between attachment type 3 and 4, and type 4 and 1(P<0.001).

Keywords

References

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