Publications (2)0.82 Total impact
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Article: Two-stage reconstruction of bilateral alveolar cleft using Y-shaped anterior-based tongue flap and iliac bone graft.
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ABSTRACT: When an alveolar cleft is too large to close with adjacent mucobuccal flaps or large secondary fistula following a primary bilateral palatoplasty exists, a one-stage procedure for bone grafting becomes challenging. In such a case, we have used the tongue flap to repair the fistula and cleft alveolus followed by bone grafting to the cleft defect performed several months later. The purpose of this article is to report on our experiences with the use of an anteriorly based Y-shaped tongue flap to fit the palatal and labial alveolar defects and on the ultimate result of the bone graft. A series of 14 patients were treated with this approach from January 1994 to December 1998. The average age of the patients was 15.8 years (range 5 to 28 years). The mean period of follow-up following the second stage bone graft operation was 45.9 months (range 9 to 68 months). In 9 of the 14 patients, the long-fork type of a Y-shaped tongue flap was used for extended coverage of the labial-side alveolar defects with the palatal fistula; in the remaining patients, the short-forked design was used. All patients demonstrated a good clinical result after the initial repair of cleft alveolus and palatal fistula. There was no fistula recurrence, although partial necrosis of distal margin in long-forked tongue flap occurred in one patient. Furthermore, the bone graft, which was performed an average of 8 months after the tongue flap repair, was always successful. Occasionally, transferred tongue tissue bulging interfered with the hygienic care of nearby teeth; however, these problems could be solved with proper contour-plasty performed afterward. No donor site complications such as sensory disturbance, change in taste, limitations in tongue movement, normal speech impairments, or tongue disfigurement were encountered. This two-stage reconstruction of a bilateral cleft alveolus using a Y-shaped tongue flap and iliac bone graft was very successful. It may be indicated for a bilateral cleft alveolus patient in which the direct closure of the cleft defect with adjacent tissue or the buccal flap is not easy because of scarred fibrotic mucosa and accompanied residual palatal fistula.The Cleft Palate-Craniofacial Journal 10/2001; 38(5):432-7. · 0.82 Impact Factor -
Conference Proceeding: Role of inserting layer controlling wavelength in InGaAs quantum dots
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ABSTRACT: Emission wavelength from the self-assembled In(Ga)As QDs on GaAs is typically around 1.0 μm. In order to be applied to optical fiber communication, the extension of its optical emission wavelength to 1.3 μm and further is necessary. Several groups have demonstrated GaAs-based InGaAs QDs with 1.3 μm photoluminescence (PL). During the formation of such ternary dots, the variation of composition and dot size make it difficult to reproducibly achieve long wavelength emission. Long emission wavelength up to 1.3 μm at room temperature cannot be realized until the In(Ga)As dots are placed in or below and InGaAs matrix. Among the proposed origins of achieving long wavelength emission from InAs quantum dots, we believe that the residual strain in quantum dots plays a key role. In this study, we have investigated the role of inserting layers tuning emission wavelength in InGaAs quantum dotsMicroprocesses and Nanotechnology Conference, 2001 International; 02/2001
