Maximum Dislodging Forces of Implant Overdenture Stud Attachments

Petropoulos, Vicki C.; Smith, Woollcott
July 2002
International Journal of Oral & Maxillofacial Implants;Jul/Aug2002, Vol. 17 Issue 4, p526
Academic Journal
Purpose: The aim of this study was to compare the retention and stability of the Nobel Biocare standard ball (NBS), Nobel Biocare 2.25-mm-diameter ball (NB2), Zest Anchor (ZA), Zest Anchor Advanced Generation (ZAAG), Stern gold ERA orange (SEO), and Sterngold ERA white (SEW) attachments on an implant-retained overdenture model. Materials and Methods: The attachments were tested using 2 permanently placed Brånemark System implants on a test model that was attached to an Instron machine (crosshead speed 50.8 mm/minute). Each attachment had one part embedded in a denture-like housing and the other part screwed into the implants. Dislodging tensile forces were applied to the housings in 3 directions simulating function: vertical, oblique, and anterior-posterior. Eight tests were done in 3 directions with 6 samples of each attachment. The dislodging forces generated measurements of the peak load (maximum dislodging force). A 1-way analysis of variance followed by the Tukey studentized range test was used to determine groups that were significantly different. All tests for significance were carried out at the .05 level of significance. Results: Results showed the ZAAG attachment to be the most retentive for the peak load measurement when subjected to vertically directed forces, with mean values and standard deviations of 37.2 ± 5.5 N. The next most retentive attachment was the NBS, followed by the SEO, NB2, SEW, and ZA. For obliquely directed forces, the ZAAG attachment was the most retentive, with mean values and standard deviations of 27.2 ± 4.2 N. The next most retentive was the NBS, followed by the NB2, SEO, ZA, and SEW. For anterior-posteriorly directed forces, results showed the NBS had the highest measured retentive force, with mean values and standard deviations of 34.6 ± 18.8 N, but this was not statistically different from the NB2 and ZAAG; this was followed by the SEO, SEW, and ZA. Discussion: There has been a marked resurgence in the treatment of patients with overdentures using implant attachments as retentive devices. The maximum force developed (a measure of retention) as the implant stud attachments were resisting removal from the implant abutments was determined. Conclusions: Based on the present study, the clinician may be able to make empirical decisions on attachment selection, depending on the amount of retention desired and the specific clinical situation.


Related Articles

  • New dental implant from Nobel.  // Journal of the Irish Dental Association;Summer2008, Vol. 54 Issue 3, p118 

    The article evaluates the NobelActive dental implant from Nobel Biocare.

  • NobelActive -- a new direction for implants.  // Journal of the Irish Dental Association;Aug/Sep2008, Vol. 54 Issue 4, p168 

    The article evaluates the NobelActive dental implant with dual-function prosthetic connection and built-in Platform Shifting from Nobel Biocare.

  • New implant launch.  // British Dental Journal;7/26/2008, Vol. 205 Issue 2, p105 

    The article evaluates Nobel Biocare's NobelActive implant.

  • Implant solutions range offers greater stability.  // British Dental Journal;1/12/2008, Vol. 204 Issue 1, p41 

    The article evaluates a range of implant products from Nobel Biocare.

  • Comparison of Load Distribution for Implant Overdenture Attachments. Porter, Jr, Joseph A.; Petropoulos, Vicki C.; Brunski, John B. // International Journal of Oral & Maxillofacial Implants;Sep/Oct2002, Vol. 17 Issue 5, p651 

    Purpose: The aim of this study was to compare the force and moment distributions that develop on different implant overdenture attachments when vertical compressive forces are applied to an implantretained overdenture. Materials and Methods: The following attachments were examined: Nobel Biocare...

  • Mandibular Implant-Supported Overdentures: A Prospective Evaluation of the Burden of Prosthodontic Maintenance with 3 Different Attachment Systems. Payne, Alan G. T.; Solomons, Yvette F. // International Journal of Prosthodontics;May/Jun2000, Vol. 13 Issue 3, p246 

    Purpose: A prospective study on mandibular implant-supported overdentures using more than 2 Brånemark implants splinted with multiple round bars evaluated a hypothesis that unnecessary prosthodontic maintenance would result from the contravention of accepted biomechanical principles....

  • Relationship Between Prosthodontic Evaluation and Patient Ratings of Mandibular Conventional and Implant Prostheses. Heydecke, Guido; Klemetti, Esa; Awad, Manal A.; Lund, James P.; Feine, Jocelyne S. // International Journal of Prosthodontics;May/Jun2003, Vol. 16 Issue 3, p307 

    Purpose: The purpose of this study was to compare clinicians' ratings of the state of oral tissues and their satisfaction with treatment to edentulous patients' ratings of treatment success after provision of mandibular implant overdentures or conventional dentures. Materials and Methods: Sixty...

  • Systematic Review of Prosthetic Maintenance Requirements for Implant-Supported Overdentures. Çehreli, Murat Cavit; Karasoy, Durdu; Kökat, Ali Murat; Akça, Kivanç; Eckert, Steven E. // International Journal of Oral & Maxillofacial Implants;2010, Vol. 25 Issue 1, p163 

    Purpose: To evaluate prosthetic maintenance requirements for implant-retained/supported overdentures via a review of the literature. Materials and Methods: Using the combined search terms "implant and overdenture," "implant-supported overdenture," "implant-retained overdenture," and...

  • A Prospective Randomized Study on the Immediate Loading of Mandibular Overdentures Supported by One or Two Implants: A 12-Month Follow-up Report. Kronstrom, Mats; Davis, Ben; Loney, Robert; Gerrow, Jack; Hollender, Lars // International Journal of Oral & Maxillofacial Implants;2010, Vol. 25 Issue 1, p181 

    Purpose: The purpose of the present study was to evaluate and compare treatment with mandibular overdentures supported by one or two implants placed and loaded immediately. Materials and Methods: Edentulous subjects with maxillary and mandibular complete dentures were recruited to participate in...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics