Publications by authors named "Akira Yanai"

Object: The authors have developed a technique for the treatment of facial paralysis that utilizes anastomosis of the split hypoglossal and facial nerve. Here, they document improvements in the procedure and experimental evidence supporting the approach.

Methods: They analyzed outcomes in 36 patients who underwent the procedure, all of whom had suffered from facial paralysis following the removal of large vestibular schwannomas.

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The cephalic index is a method of assessing skull morphology in craniosynostosis. There are known racial differences; however, there are few reports on this index in Japan. In this study, we investigated the cephalic indices of Japanese children with normal brain development using axial slice computed tomography.

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Median cleft lip is usually divided into true and false when being discussed. Owing to recent developments of diagnostic imaging methods that have improved the accuracy, the presence of an intermediate type of median cleft lip, which cannot simply be divided into true and false, has been suggested. However, the simple method of classification is still clinically valuable.

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A nasal bone fracture is usually repositioned using either Walsham or Asch forceps. However, accurate repositioning is often difficult. We therefore performed a repositioning technique using the little finger in 10 patients with a new nasal fracture.

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Background: The technique chosen to reconstruct anterior lamellar defects of the upper eyelid requires careful consideration. We modified pre-existing techniques used to reconstruct anterior lamellar defects after tumour resection and have called this procedure a hemi-orbicularis oculi switch flap.

Methods: This musculocutaneous flap is elevated with underlying orbicularis and its base abuts the anterior lamellar defect.

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Background: Full-thickness skin defects with exposed bone are often hard to heal. The lack or delayed re-vascularization is considered one of the major causes, and the periosteum is also suggested to have an important role in tissue regeneration.

Materials And Methods: Full-thickness skin defect wounds with exposed bone were made in the parietal region of Wister rats.

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Various reports describe surgical techniques for closing a meningomyelocele defect. We have used a combination flap consisting of a vertical bipedicled flap and V-Y advancement flap and used this technique in the successful repair of 11 meningomyelocele defects. The vertical bipedicled flap enhances the blood supply to the V-Y advancement flap with no sacrifice of muscle tissue.

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The purpose of the treatment of mandibular fractures is to restore proper dental occlusion and stable temporomandibular joint movement, as well as the reduction of the displaced fracture. Consideration must be given to the selection of the most appropriate surgical and rehabilitation methods in such patients. Typical surgical methods for the treatment of mandibular fractures include the arch bar method or plating at the location of the fracture combined with fixing the mandible to the maxilla using the arch bar method.

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Reconstruction for polysyndactyly of the toes aims at cosmetic improvement. A previous method that uses a skin graft has inherent disadvantages of mismatched pigmentation between the graft and the surrounding skin and scar formation at the donor site. The authors' new improved surgical technique for the treatment of polysyndactyly of the toes does not require a skin graft and therefore avoids these problems.

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Recent evidence supports the use of end-to-side neurorrhaphy for the treatment of certain peripheral nerve disorders. However, the mechanism by which nerves regenerate following this procedure is still unclear. To address this question, the authors designed a new end-to-side coaptation model in rats in which the donor nerves were uninjured.

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The accurate diagnosis and treatment of posterior plagiocephaly have been a source of controversy. The unilateral lambdoid synostosis that is characterized by flattening of ipsilateral occipital bone is a rare type of craniosynostosis. An 8-month-old infant with unilateral lambdoid synostosis is reported.

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Lymphangioma of the tongue is relatively rare and may cause facial structural deformity. Using a combination of a V-shaped and central resection, we successfully treated a 6-year-old girl who had massive lymphangioma of the tongue. Postoperatively, her tongue was located completely within her mouth with good cosmetic results.

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Aplasia cutis congenita is a rare condition characterized by the congenital absence of skin. The authors report a case of aplasia cutis congenita of the scalp associated with bilateral coronal synostosis. Simultaneous fronto-orbital advancement and skull reconstruction for large defect at the fontanelle were performed in the initial operation.

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Several perforator-based flaps have been developed recently and, although preoperative evaluation of perforator vessels is important, the conventional method using the Doppler flowmeter is still being used. The authors tried to identify perforator vessels in the abdominal region using scanning laser Doppler imaging and then compared the results with those obtained using an ultrasonic Doppler flowmeter in 10 healthy volunteers. The scanning laser Doppler detected several perforator vessels (range, 2-5 vessels; mean, 3.

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