• Title/Summary/Keyword: Tooth abnormalities

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Charcot-Marie-Tooth Disease Type 1A Diagnosed Based on Abnormalities in a Nerve Conduction Study in a Patient with Myotonic Dystrophy Type 1: A Case Report (신경전도검사의 이상소견을 보이는 근긴장디스트로피 환자에서 진단된 1형 샤르코-마리-투스 병: 증례보고)

  • Lee, Hyung Nam;Won, Yu Hui
    • Journal of Electrodiagnosis and Neuromuscular Diseases
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    • v.20 no.2
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    • pp.148-152
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    • 2018
  • Myotonic dystrophy type 1 (DM1) is an autosomal dominant multisystem disorder and one of the most common muscular dystrophies affecting adults. Charcot-Marie-Tooth (CMT) disease, a common hereditary neuropathy, is characterized by atrophy of the distal limbs and peripheral nerve abnormalities. The authors report a rare case involving a 24-year-old female who was diagnosed simultaneously with both DM1 and CMT1A based on the results of a nerve conduction study (NCS). The patient, who had previously been diagnosed with DM1, was admitted for lower extremity pain. Her electrodiagnostic examination continued to reveal severe sensorimotor demyelinating polyneuropathy, and a genetic study was performed to confirm whether she had other hereditary neuropathies, except DM1, that suggested CMT1A, the most common phenotype of CMT. Severe abnormalities in an NCS in a DM1 patient may suggest the incidental coexistence of hereditary neuropathies, and further evaluations, such as genetic studies, should be performed for proper diagnosis.

Analysis of periodontal attachment loss in relation to root form abnormalities

  • Chung, Young-Mi;Jeong, Seong-Nyum
    • Journal of Periodontal and Implant Science
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    • v.43 no.6
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    • pp.276-282
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    • 2013
  • Purpose: The aim of this study was to explore root shape abnormalities, to investigate the influence of root form abnormalities on periodontal attachment loss, and to gather basic data to assist in the diagnosis and treatment of aggressive periodontitis. Methods: From January 2010 to June 2012, a survey was conducted of all 3,284 periodontitis patients who visited the Department of Periodontology, Daejeon Dental Hospital, Wonkwang University School of Dentistry. Clinical parameters (probing depth, periodontal attachment loss, missing teeth) were measured and a radiographic examination was performed at the baseline. We classified the root shape abnormality of bicuspids and molars based on Meng classification. Results: The periodontal attachment loss was the highest at the maxillary first molar (6.03 mm). The loss of the second molar was prominent. Type V deformity was shown to be the most common in the second maxillary and mandibular molars (P<0.05). Type V root shape was associated with the highest attachment loss (P=0.01). Conclusions: Considering the small population and limited design of this study, definitive conclusions cannot be drawn. We suggest larger scale, methodologically more sophisticated studies that include normal controls and chronic periodontitis patients to clarify whether root form abnormalities are a potential risk factor for aggressive periodontitis.

Hypodontia Pattern and Genetic Association in Cleft Lip and Palate Patients (구순구개열 환자의 치아 선천결손 유형과 관련 유전자에 관한 고찰)

  • Ahn, Hyo-Won;Baek, Seung-Hak
    • Korean Journal of Cleft Lip And Palate
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    • v.10 no.2
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    • pp.81-88
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    • 2007
  • Cleft lip and palate (CLP) is one of the most prevalent congenital craniofacial anomalies. It has a significantly greater incidence of dental abnormalities in number, size, shape, and eruption of the teeth. Knout-out mouse model can identify several genes which play an important role in tooth agenesis. Since disruption of these genes has been confirmed to result in tooth agenesis in humans, CLP associated with hypodontia may be the best models for isolated tooth agenesis. According to the studies of dental abnormalities in CLP, the severity of dental defect is known to be influenced by the CLP phenotype. The cumulative data obtained from mouse and human genetic studies indicated that MSX1, PAX9 and AXIN2 are considered as candidate genes in non-syndromic hypodontia, while Shh, Pitx2, Irf6, p63 and EDA pathway genes are involved in syndromic one. We expect that genetic approach of CLP can offer the basis for tooth regeneration and be a new target in hypodontia therapy.

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Assessment of Risk Factors for Dental Developmental Disorders in Pediatric Cancer Survivors

  • Jihyun Lee;Hyung-Jun Choi;Jaeho Lee;Je Seon Song;Chung-Min Kang
    • Journal of the korean academy of Pediatric Dentistry
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    • v.50 no.4
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    • pp.421-433
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    • 2023
  • This study was to examine the developmental dental abnormalities in childhood cancer survivors. Risk factors were assessed for 125 children with radiographic data through a retrospective analysis of medical records and panoramic images. 68.0% of childhood cancer survivors exhibited at least one dental abnormality. The types of abnormalities varied depending on the age at cancer diagnosis and treatment intensity, ranging from microdontia (43.2%), to abnormal root development (39.2%) and tooth agenesis (33.6%). Logistic regression analysis demonstrated that a young age at diagnosis (under 3 years), the use of heavy metal agents, a history of hematopoietic stem cell transplantation (HSCT), and combination treatment of chemotherapy, radiation therapy, and HSCT were associated with a significantly higher risk for overall dental abnormalities. The increased risk ratios were 6.00, 3.06, 3.22, and 7.87, respectively (p < 0.05). The results of this study will predict dental abnormality in permanent dentition according to the diagnosis age and treatment method of childhood cancer.

Multiple jaw cysts not associated with basal cell nevus syndrome (기저세포모반증후군을 동반하지 않은 다발성 악골낭 두 증례)

  • Yoon Suk-Ja;Kang Byung-Cheol
    • Imaging Science in Dentistry
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    • v.33 no.3
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    • pp.195-198
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    • 2003
  • We present two cases of multiple jaw cysts not associated with basal cell nevus syndrome. Case 1: a nine year-old boy visited CNU Hospital for orthodontic treatment and his radiographs showed cystic lesions surrounding the crowns of teeth #13 and #17 respectively, which were diagnosed as dentigerous cysts. Subsequently, two more cysts were found on his follow-up radiographs in 12 and 15 months. The two cysts were determined to be odontogenic keratocysts. The boy had no skeletal abnormalities and no skin lesions associated with basal cell nevus syndrome. Case 2: a fifty-eight year old man had three impacted third molars with pericoronal radiolucencies, which were diagnosed as dentigerous cysts. He had no additional abnormalities associated with basal cell nevus syndrome. Multiple jaw cysts can occur at any age, and periodic radiographic surveillance may be needed for any cases of impacted tooth.

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MICRODONTIA IN A CHILD TREATED WITH CHEMOTHERAPEUTIC AGENT (항암 화학치료를 받은 아동의 치아발육이상 : 증례 보고)

  • Kye, Hi-Ran;Lee, Jae-Ho;Kim, Seong-Oh;Sohn, Heung-Kyu
    • Journal of the korean academy of Pediatric Dentistry
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    • v.26 no.1
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    • pp.146-150
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    • 1999
  • With the improved cure rates for childhood malignant conditions in the past decade, late effects of cancer therapy must be recognized to minimize their impact on the quality of life in long-term survivors. Chemoradiation therapy is a major part of pediatric oncology treatment and is implicated in causing tooth agenesis, microdontia, root shortening, early apical closure, and coronal hypocalcification. Dental development may be affected by illness, trauma, chemotherapy, or radiation therapy at any point prior to complete maturation. Treatment given during the first 3.5 years of life was more likely to affect the dental lamina and crown formation and result in a small tooth. Dental treatment affected by chemoradiation damage to developing teeth includes orthodontic tooth movement, prosthetic abutment consideration, periodontal health, space maintenance, requirement for home fluoride regimens to protect hypomineralized teeth, and enodontic procedures. Dental abnormalities are common in patients treated for cancer, and these children require aggressive dental follow-up. Meticulous surveillance may facilitate detection of abnormalities, enabling the dental practitioner to intervene earlier in promoting a more aggressive regimen of oral care, thus reducing the morbidity associated with dental sequelae of oncotherapy, specifically periodontal disease and malocclusion. In this case, we report microdontia of all permanent second premolar and second molar in an 8 year old boy treated with chemotherapeutic agents during period of active dental development(14 months to 38 months of age).

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Ecotoxicological Responses and Morphological Abnormalities in Chironomus plumosus Larvae Exposed to 4-tert-octylphenol (4-tert-octylphenol에 노출된 장수깔따구 Chironomus plumosus의 생태독성 반응과 기형)

  • Bang, Hyun-Woo;Lee, Chang-Hoon;Jung, Kyung-Suk;Kwak, Inn-Sil
    • Environmental Analysis Health and Toxicology
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    • v.23 no.4
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    • pp.277-284
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    • 2008
  • The ecotoxicological effects of 4-tert-octylphenol were observed on non-biting midge, Chironomus plumosus collected from Anyang stream in Seoul. The survival rate and adult emergence rate on C. plumosus exposed to octylphenol were not significantly affected. However, 4-tert-octylphenol induced developmental delay and disrupted sex ratio in high concentration of octylphenol. The mouth deformity such as tooth deletion or fusion in mentum, and tooth deletion in mandible were observed exposure to 4-tert-octylphenol. The deformity type of the mentum showed deletion (LT, 6.7%), and fusion (LT, 6.3%). Moreover, tooth deletion of mandible was observed in 4-tert-octylphenol treated groups (6.7%, 3 ppm).

The Effects of Some Halitosis Removal Methods on the Reduction of Intraoral Volatile Methyl Mercaptan Concentrations (수종 구취제거법이 구강내 휘발성 메틸머캅탄 감소에 미치는 영향)

  • An-Hee Lee;Woo-Cheon Kee
    • Journal of Oral Medicine and Pain
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    • v.18 no.1
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    • pp.97-105
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    • 1993
  • In order to evaluate the effectiveness of tooth brushing, mouth gargling and gum chewing in reducing halitosis, 84 individuals ranging in age from 22 59 28 years old were examined. These individuals had no gross oral abnormalities, other than mild gingival inflammation, dental caries, nasopharyngeal disorder, or systemic diseases that were associated with halitosis. They were divided into a tooth brushing group, a mouth garging group, a gum chewing group and a control group that did not use any halitosis removing method. Each of the groups included 21 persons, B.B. Checker (Tokuyama Soda Col, LTDl, Japan) was used to measure the concentrations of intraoral volatile methyl mercaptan of each group. The concentrations of intraoral volatile methyl mercaptan were measured before and after lunch, and after removing halitosis by toothe brushing, mouth gargling and gum chewing. The obtained results were as follows : 1. The average concentration of intraoral volatile methyl mercaptan before lunch was 1.79ppm and after lunch it was 2.02ppm, an increase of 12.9%. 2. In the tooth brushing group the average concentration of intraoral volatile methyl mercaptan was 0.61ppm, in the mouth gargling group it was 1.15ppm, in the gum chewing group it was 1.64ppm and in the control group it was 1.92ppm. It decreased 69.5% in the tooth brushing group, 43.8% in the mouth gargling group, 18.4% in the gum chewing group and 5.4% in the control grop (p<0.05). 3. There were significant differences between the tooth brushing and control group, tooth brushing and gum chewing group and between mouth gargling and control group in concentrations of intraoral volatile methyl mercaptan after using the halitosis removing methods (p<0.05). According to the above results, tooth brushig and mouth gargling are effective ways to reduce halitosis.

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A neonate with Joubert syndrome presenting with symptoms of Horner syndrome

  • Lee, Narae;Nam, Sang-Ook;Kim, Young Mi;Lee, Yun-Jin
    • Clinical and Experimental Pediatrics
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    • v.59 no.sup1
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    • pp.32-36
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    • 2016
  • Joubert syndrome (JS) is characterized by the "molar tooth sign" (MTS) with cerebellar vermis agenesis, episodic hyperpnea, abnormal eye movements, and hypotonia. Ocular and oculomotor abnormalities have been observed; however, Horner syndrome (HS) has not been documented in children with JS. We present the case of a 2-month-old boy having ocular abnormalities with bilateral nystagmus, left-dominant bilateral ptosis, and unilateral miosis and enophthalmos of the left eye, which were compatible with HS. Brain magnetic resonance imaging (MRI) revealed the presence of the MTS. Neck MRI showed no definite lesion or mass around the cervical sympathetic chain. His global development was delayed. He underwent ophthalmologic surgery, and showed some improvement in his ptosis. To the best of our knowledge, the association of HS with JS has not yet been described. We suggest that early neuroimaging should be considered for neonates or young infants with diverse eye abnormalities to evaluate the underlying etiology.