• Title/Summary/Keyword: 발육장애

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A Case of Microtia (선천성 외이기형)

  • 김세훈;원상희;황명순;한주호;김선우
    • Proceedings of the KOR-BRONCHOESO Conference
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    • 1981.05a
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    • pp.40.2-40
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    • 1981
  • The deformities of the auricle is rare and classified roughly into two categories as "Hyperplasia and Hypoplasia". Microtia occurs about once in every 6000 births and is twice as frequent in males as in females and the unilateral to bilateral ratio is roughly 8 : 1. Significant malformation of the auricle frequently involves the external auditory canal and the contents of the middle ear. Recently, the authors experienced a case of hypoplasia of the superior third of the right auricle of 24 year old male, with neither hearing impairment nor any other associated defect, who was surgically corrected by rotation flaps through post-auricular incision.

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Association between Developmental Anomalies of Permanent Lateral Incisors and Tooth Eruption Disturbances (영구 측절치 발육 이상과 치아 맹출 장애의 연관성)

  • Kim, Minji;Song, Jisoo;Shin, Teo Jeon;Hyun, Hong-Keun;Kim, Young-Jae;Kim, Jung-Wook;Lee, Sang-Hoon;Jang, Ki-Taeg
    • Journal of the korean academy of Pediatric Dentistry
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    • v.47 no.2
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    • pp.128-139
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    • 2020
  • The purpose of this study was to examine the prevalence of developmental anomalies of permanent lateral incisor and eruption disturbances and analyze the association between two components. Panoramic radiographs of 3984 patients (aged 5 to 13 years) who visited the Department of Pediatric Dentistry of Seoul National University Dental Hospital between November 2016 and October 2017 were screened. The prevalence of developmental anomalies of permanent lateral incisors was 10.2%. The most common developmental anomalies were congenitally missing teeth(66.1%), followed by peg lateralis(33.5%). The prevalence of eruption disturbances was 16.5%. Among the patient with developmental anomalies of permanent lateral incisors, associated eruption disturbances were appeared on 31.1% of patients. Peg lateralis(p < 0.001), underdeveloped lateral incisors(p < 0.001) and dens invaginatus(p = 0.004) were associated significantly with eruption disturbance of permanent teeth. Eruption disturbance in patients with peg lateralis and dens invaginatus was most prevalent in maxillary canine. For patients with underdeveloped lateral incisor, eruption disturbance of maxillary central incisor was most frequent. It is important for patients with developmental anomalies of lateral incisors to detect associated eruption disturbance early through regular checkup. Diagnosis and treatment plan in view of such relationships is important in order to treat appropriately at the optimal time.

SURGICAL CORRECTION OF HEMIFACIAL MICROSOMIA REPORT OF A CASE (Hemifacial Microsomia의 외과적 교정 1례)

  • Yang, Dong-Kyu;Kim, Jong-Ryoul;Choi, Kab-Rim;Park, Sang-Jun;Kim, Byung-Min
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.11 no.2
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    • pp.19-27
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    • 1989
  • Hemifacial microsomia is characterized underdevelopment of the TMJ, mandibular ramus, and associated muscles of mastication. The Maxilla and malar bones on the affected side frequently are underdeveloped. The contiguous parotid gland may be hypoplastic. Preauricular sinus tracts and tags may exist, along with underdevelopment of the associated external ear, and affected facial nerve and muscles of facial expression may also show dysfunction. Children exhibiting the more classic signs will be identified at birth. Little is known about the etiology of hemifacial microsomia. We have corrected surgically a 22-year-old woman with hemifacial microsomia. We have performed leveling Le Fort I osteotomy with iliac bone graft on the maxilla, reverse-L osteotomy and iliac bone graft on the right mandibular ramus, vertical ramus osteotomy on the left side, onlay bone graft on the right mandibular body, and augmentation genioplasty. The postoperative course was uneventful and restoration of facial asymmetry was achieved.

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DEVELOPMENTAL DISTURBANCE OF PERMANENT TEETH AFTER RADIOTHERAPY FOR TREATMENT OF MALIGNANT TUMOR : REPORT OF CASES (소아암 환자에서 방사선 치료 후 영구치 치근발육장애 : 증례보고)

  • Heo, Su-Kyung;Choi, Nam-Ki;Kim, Seon-Mi;Yang, Kyu-Ho
    • Journal of the korean academy of Pediatric Dentistry
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    • v.35 no.1
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    • pp.144-150
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    • 2008
  • Multimodal cancer therapy including surgery, chemotherapy, and radiotherapy could not only improve the prognosis of malignancy but also reduce the dosage and toxicity of cancer drug for treatment of malignant tumor. The effects of radiotherapy are generally localized, additive, and accumulative, and depend on dosage, site and cell sensitivity. However, in growing individuals, the dental and skeletal sequelae to radiotherapy result in dental or facial abnormalities that are irreversible : arrested root development, disturbances in enamel formation, microdontia, anodontia, altered tooth eruption and mandibular or maxillary hypoplasia. Especially, the teeth which are developing is affected according to the stage. We report three cases of developmental disturbance of permanent teeth after radiotherapy. These children had received radiotherapy for malignant tumor at the age of 3 to 4 years, in which root hypoplasia, short tapered root and early apex closure were observed. For the management of radiation caries and radiotherapy-related teeth, periodic recall check and oral hygiene instruction are required.

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