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Evaluation of two interforaminal implants and implant-assisted removable dentures on stress distribution: an in vitro study

대한구강악안면외과학회지 2019년 45권 4호 p.199 ~ 206
 ( Bilhan Selda Arat ) - Waltrop,Private Office

 ( Geckili Onur ) - Istanbul University Faculty of Dentistry Department of Prosthodontics
 ( Cilingir Altug ) - Trakya University Faculty of Dentistry Department of Prosthodontics
 ( Bozdag Ergun ) - Istanbul Techinical University Faculty of Mechanical Engineering Laboratory of Biomechanics
 ( Bilhan Hakan ) - University Witten/Herdecke School of Dentistry Department of Periodontology


Objectives: In mandibular edentulism, the treatment option with a two-interforaminal implant-retained bridge and a removable partial denture is rarely evaluated in literature. The aim of this in vitro study was to evaluate the stress distribution of this treatment option by comparing it with traditional treatment options with interforaminal implants in the edentulous mandible.

Materials and Methods: Two interforaminal implants were placed in a formalin-fixed cadaver mandible, and overdentures with three different types of attachments were fabricated: (1) two ball attachments and an overdenture, (2) a Dolder bar and an overdenture, and (3) screw-retained two-implant inter-canine porcelain fused to a metal bridge and an implant-assisted removable denture (IARD) with precision attachments. Three biting conditions were generated for each denture type, and the strains were documented under vertical loading of 100 N.

Results: The calculated strain values from measured strains in all measurement sites and loading conditions for the screw-retained two-implant inter-canine porcelain fused to a metal bridge and a cast framework partial denture with precision attachments situation were lower than in the other scenarios (P<0.05).

Conclusion: Within the limitations of the present study, it can be concluded that an IARD may be a reasonable and valuable alternative to ball attachments or a bar in two interforaminal implants, especially when the patients prefer to be able to show their teeth even when they take out their removable dentures.


Implant; Strain gauge; Removable denture; Overdenture; Dental
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