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KMID : 1033920170130020037
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Journal of The Korean Academy of Geriatric Denstry
2017 Volume.13 No. 2 p.37 ~ p.43
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Alveolar bone study of implant marginal bone resorption between mandibular bar and locator type implant supported
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Ahn Tae-Woong
Park Chul-Min
Seol Ga-Young
Yoo Kil-Hwa
Yoon Sun-Ung
Kang Na-Ra
Oh Min-Seok
Park Young-Ju
Shin Dong-Soo
Park Chan-Ik
Kang Se-Ha
Kim Ju-Won
Kim So-Young
Ahn Je-Young
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Abstract
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This is retrospective study of comparison of implant marginal bone resorption between mandibular bar and locator type implant supported overdenture. The degree of marginal bone resorption was compared between 80 patients who were restored with bar type implant supported overdenture with 4 implants on mandibular anterior region and 40 patients who were restored with locator type implant supported overdenture with 2 implants on mandibular anterior region. For each implant, the radiograph was evaluated regarding marginal bone height and changes over the time. The marginal bone height and bone-level changing over the time was assessed at the mesial and distal surface of each implant by measuring the distance between the reference point of the implant. 3 months after the implantation, overdenture was delivered on operation site and there was more marginal bone resorption on bar type overdenture than locator type overdenture. And there was more marginal bone resorption on fixed antagonistic arch as for bar type overdenture and on removable antagonistic arch as for locator type overdenture. There was more marginal bone resorption on anterior tooth than posterior tooth as for bar type overdenture. Based on this retrospective study and many other studies, we may be able to speculate effective and predictable treatment options for implant supported overdenture.
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KEYWORD
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Dental implant, Implant supported overdenture, Marginal bone resorption, Bar type attachment, Locator type attachment
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