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VOLUME 3 , ISSUE 1 ( January-March, 2013 ) > List of Articles


Development of New Attachment System with Soft Lining Material for Implant-retained Complete Denture

Takayuki Ueda, Kaoru Sakurai, Takashi Koike, Syuutarou Noda, Koichiro Ogami

Citation Information : Ueda T, Sakurai K, Koike T, Noda S, Ogami K. Development of New Attachment System with Soft Lining Material for Implant-retained Complete Denture. Int J Prosthodont Restor Dent 2013; 3 (1):21-24.

DOI: 10.5005/jp-journals-10019-1070

Published Online: 01-12-2015

Copyright Statement:  Copyright © 2013; The Author(s).



The retention of complete dentures is frequently difficult in edentulous patients with a severely resorbed residual alveolar ridge. In such cases, implant overdentures having a stronger retention force are useful. Although there are various types of attachment systems for implant overdentures, they are frequently complicated. We are, therefore, developing a simple attachment system focusing on a soft lining material for the female connector. The purpose of this study was to evaluate the retention force of implant overdentures applying a soft lining material for the attachment.

Materials and methods

The models in which seven male and female connector pairs were used. As the control, a rubber O-ring attachment system, in which a rubber O-ring female was paired with a metal ball anchor (male), having a diameter of 1.7 or 2.2 mm. In the attachment system with a soft lining material, a female component was made up of soft lining material paired with a male having a diameter of 1.7, 2.2, 2.5, 2.7 or 3.0 mm. In measuring the retention force, the maximum force required to dislodge the male from the female was recorded by a digital force gauge.


With the rubber O-ring, the retention force was 2.9 ± 0.2 N for the 1.7 mm male and 3.3 ± 0.3 N for the 2.2 mm male; these values were higher than the respective retention forces when using a soft lining material as the female and a male of the same diameter. However, with the female comprising soft lining material, the retention force exceeded 4 N for the 2.5, 2.7 and 3.0 mm males and was higher than the retention forces for the rubber O-ring.


The proposed attachment system with soft lining material for implant overdentures provides a clinically sufficient retention force when the diameter of the male exceeds 2.5 mm.

How to cite this article

Koike T, Ueda T, Noda S, Ogami K, Patil PG, Sakurai K. Development of New Attachment System with Soft Lining Material for Implant-retained Complete Denture. Int J Prosthodont Restor Dent 2013;3(1):21-24.

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  1. The McGill consensus statement on overdentures. Mandibular two-implant overdentures as first choice standard of care for edentulous patients. Montreal, Quebec, May 24-25, 2002. Int J Oral Maxillofac Implants 2002 Jul-Aug;17(4):601-602.
  2. A survey of the use of mandibular implant overdentures in 10 countries. Int J Prosthodont 2004 Mar-Apr;17(2):211-217.
  3. Wear of ceramic and titanium ball attachments in subjects with an implant-retained overdenture: a controlled clinical trial. J Prosthet Dent 2012 Feb;107(2):109-113.
  4. Comparison of load distribution for implant over denture attachments. Int J Oral Maxillofac Implants 2002 Sep-Oct;17(5):651-662.
  5. Stress analysis of mandibular two-implant overdenture with different attachment systems. Dent Mater J 2011 Nov;30(1):928-934.
  6. Generation of retentive force by electroformed telescope crowns. J Osaka Dent Univ 2009;43:19-28.
  7. O-ring coping attachments for removable partial dentures. J Prosthet Dent 1995 Sep;74(3):235-241.
  8. Use of an implant O-ring attachment for the tooth supported mandibular overdenture: a clinical report. Eur J Dent 2011 Jul;5(3):331-336.
  9. An overview of the O-ring implant overdenture attachment: clinical reports. J Oral Implantol 2002;28(2):82-86.
  10. Fabrication of occlusal device for protection of implant overdenture abutments with O-ring attachments. J Prosthet Dent 2003 Dec;90(6):605-607.
  11. Retentive force of O-ring attachment to use Immediate Provisional Implant (IPI)-retained overdenture. Eur J Prosthodont Restor Dent 2005 Dec;13(4):147-149.
  12. The clinical and radiographic outcome of immediately loaded mini implants supporting a mandibular overdenture. A 3-year prospective study. J Oral Rehabil 2011 Nov;38(11):827-834.
  13. Effect of splinting mini-implants on marginal bone loss: a biomechanical model and clinical randomized study with mandibular overdentures. Int J Oral Maxillofac Implants 2010 Nov-Dec;25(6):1137-1144.
  14. Influence of anterior palatal coverage on perception and retention in complete dentures. J Prosthet Dent 2011 Apr;105(4):272-279.
  15. Prosthetic aspects and patient satisfaction with two-implant-retained mandibular overdentures: a 10-year randomized clinical study. Int J Prosthodont 2004 Jul-Aug;17(4):401-410.
  16. Evaluation of tensile bond strength of heat cure and autopolymerizing silicone-based resilient denture liners before and after thermocycling. Indian J Dent Res 2012 Jan-Feb;23(1):64-68.
  17. Survival analysis of mandibular complete dentures with acrylicbased resilient liners. Gerodontology 2013 sep;30(3):187-193.
  18. Complications associated with the ball, bar and Locator attachments for implant-supported overdentures. Med Oral Patol Oral Cir Bucal 2011 Nov 1;16(7):e953-e959.
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