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KMID : 0362420150530030207
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Journal of Korean Academy of Prosthodontics
2015 Volume.53 No. 3 p.207 ~ p.214
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Removable implant-supported partial denture using milled bar with Locator attachments in a cleft lip & palate patient: A clinical report
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Yang Sang-Hyun
Kim Kyoung-A
Kim Ja-Yeong
Seo Jae-Min
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Abstract
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Due to the limitations of conventional removable partial denture prostheses to treat a cleft lip & palate patient who shows scar tissue on upper lip, excessive absorption of the maxillary residual alveolar ridge, and class III malocclusion with narrow palate and undergrowth of the maxilla, 4 implants were placed on the maxillary edentulous region and a maxillary removable implant-supported partial denture was planned using a CAD/CAM milled titanium bar. Unlike metal or gold casting technique which has shrinkage after the molding, CAD/CAM milled titanium bar is highly-precise, economical and lightweight. In practice, however, it is very hard to obtain accurate friction-fit from the milled bar and reduction in retention can occur due to repetitive insertion and removal of the denture. Various auxiliary retention systems (e.g. ERA, CEKAC,magnetics, Locator attachment), in order to deal with these problems, can be used to obtain additional retention, cost-effectiveness and ease of replacement. Out of diverse auxiliary attachments, Locator has characteristics that are dual retentive, minimal in vertical height and convenient of attachment replacement. Drill and tapping method is simple and the replacement of the metal female part of Locator attachment is convenient. In this case, the Locator attachment is connected to the milled titanium bar fabricated by CAD/CAM, using the drill and tapping technique. Afterward, screw holes were formed and 3 Locator attachments were secured with 20 Ncm holding force for additional retention. Following this procedure, satisfactory results were obtained in terms of aesthetic facial form, masticatory function and denture retention, and I hereby report this case.
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KEYWORD
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Removable implant-supported partial denture, Bar attachment, Locator??attachment, Cleft lip & palate
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