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The International Journal of Prosthodontics



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Int J Prosthodont 30 (2017), No. 3     18. May 2017
Int J Prosthodont 30 (2017), No. 3  (18.05.2017)

Page 248-250, doi:10.11607/ijp.4995, PubMed:28319215

Number and Location of Mini-Implants Retaining a Mandibular Overdenture to Resist Lateral Forces: A Preliminary In Vitro Study
Takagaki, Kyozo / Gonda, Tomoya / Maeda, Yoshinobu
Purpose: The aim of this study was to determine the optimal number and location of miniimplants retaining an overdenture to resist lateral forces.
Materials and Methods: A strain gauge was attached to a mini-implant and placed in an edentulous mandible model. The following different implant locations were evaluated: one mini-implant at the midline, two miniimplants in the lateral incisor regions, two mini-implants in the canine regions, and four miniimplants.
Results: Lateral forces on mandibular overdentures retained by one mini-implant at the midline or two mini-implants in the lateral incisor regions appeared to be advantageous when compared with placing two mini-implants in the canine regions or four mini-implants.
Conclusion: Fewer mini-implants resulted in less lateral stress, while four were associated with an unequal stress distribution.