Publications by authors named "Mi-Ra Ahn"

Purpose: The aim of this retrospective study was to evaluate the cumulative survival rate of tapered implant with a sandblasted and acid-etched surface placed in edentulous patients.

Materials And Methods: A retrospective study was performed by evaluating MIS seven implants consecutively placed from December 2004 to January 2008. Patient records were reviewed to determine gender, age at implant placement, implant location, prosthesis type, marginal bone loss according to treatment procedure, number of implants, and number of failed implants.

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The aim of this report is to investigate the efficacy of the sandwich technique for vertical bone augmentation in the atrophic posterior mandible of three patients through clinical and histologic studies. A complete osteotomy was conducted using a piezoelectric device to create segmented bone in the atrophic edentulous area and the segmented bone was elevated 6 mm vertically. Interpositional mineral allograft materials were inserted in the space between the basal bone and the segmented bone.

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Purpose: Various sinus augmentation procedures, using bone substitutes, have been used to place dental implants in the atrophic posterior maxilla. The aim of this article is to evaluate the possibility of new bone formation in the maxillary sinus without a bone graft.

Materials: Ten patients without significant sinus pathosis were selected for this study.

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The reconstruction of a maxillary anterior dentoalveolar defect in patients with trauma has been a challenge for surgeons. Extensive loss of bone and teeth in the anterior maxilla presents a complex problem for reconstruction. This is owing to the difficulty in achieving complete closure using overlying soft tissue.

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Grafting with intraoral bone blocks is a good way to reconstruct severe horizontal and vertical bone resorption in future implant sites. The Piezosurgery System (Mectron) creates an effective osteotomy with minimal or no trauma to soft tissue, in contrast to conventional surgical burs or saws. In addition, piezoelectric surgery produces less vibration and noise because it uses microvibration, in contrast to the macrovibration and extreme noise that occur with a surgical saw or bur.

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The use of immediate loaded prostheses is not recommended for at least 2 weeks to prevent implants from premature loading. In addition, immediate removable prostheses are negated for at least 4 weeks at the site of guided bone regeneration or bone graft. However, patients are often not pleased with limited diets and the unaesthetic appearance during the healing period without a denture between implant placement and final prosthesis.

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