• Title/Summary/Keyword: delayed eruption

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AMELOBLASTIC ODONTOMA OCCURRED IN THE MANDIBLE (하악골에 발생된 법랑모치아종)

  • Ha Ssang-Yong;Song Nam-Kyu;Koh Kwang-Joon
    • Journal of Korean Academy of Oral and Maxillofacial Radiology
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    • v.26 no.2
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    • pp.181-189
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    • 1996
  • Ameloblastic odontoma is a mixed odontogenic tumor, which is characterized as being extremely rare, displaying aggressive clinical behavior, resembling a mixed radiopaque and radiolucent radiographic appearance and containing both ameloblastoma and a composite odontoma. Seven-year-old boy complaining of delayed eruption of the left lower permanent 1st molar came to the department of Oral & Maxillofacial Radiology at Chonbuk National University Hospital. The list of our radiographic differential diagnosis included the dental follicle, compound odontoma, complex odontoma and cystic odontoma. The microscopic analysis showed the lesion with the characteristics of an ameloblastic odontoma. The obtained results were as follows; 1. The area was asymptomatic, but the delayed eruption of the left lower permanent 1st molar was observed. Radiographically, well-defined widened pericoronal radiolucency containing several tooth-like radiopacities involving the impacted left lower permanent 1st molar and well-defined round radiolucency containing irregular radiopaque mass were observed. 3. Histopathologically, several tooth-like structures, odontoma components with the area of typical enamel, dentin and pulp, and ameloblastic components with typical follicular ameloblastoma were observed.

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Cystic lesion between a deciduous tooth and the succeeding permanent tooth: a retrospective analysis of 87 cases

  • Changmo, Sohn;Jihye, Ryu;Inhye, Nam;Sang-Hun, Shin;Jae-Yeol, Lee
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.48 no.6
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    • pp.342-347
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    • 2022
  • Objectives: The purpose of this study is to investigate the characteristics of dentigerous and radicular cysts that occur between deciduous and succeeding permanent teeth and to propose considerations for differential diagnosis of cysts at the treatment planning stage in the outpatient clinic. Materials and Methods: A total of 87 patients with a cystic lesion located between a deciduous tooth and the succeeding permanent tooth participated in the study. Twelve variables were analyzed to diagnose such a cyst. For data analysis, Fisher's exact test was used to determine the statistical significance of the variables. Results: Of the total 87 patients who participated in this study, 69 were diagnosed with dentigerous cysts and 18 were diagnosed with radicular cysts. Seven of the 12 differential factors analyzed in this study were statistically significant: age, location, symptoms, dental caries, endodontic treatment, delayed eruption, and size. Conclusion: Several criteria can be considered for diagnosis of dentigerous cysts or radicular cysts. Age, location, presence of symptoms and dental caries, previous endodontic treatment, cystic size, and delayed eruption of impacted permanent teeth are reliable factors that should be considered when diagnosing dentigerous and radicular cysts.

CLEIDOCRANIAL DYSPLASIA : A CASE REPORT (쇄골두개 이형성증 환아의 증례보고)

  • Kim, Tae-Wan;Kim, Young-Jin
    • The Journal of Korea Assosiation for Disability and Oral Health
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    • v.3 no.2
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    • pp.91-96
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    • 2007
  • Cleidocranial dysplasia(CCD) is a congenital genetic disorder of skeletal and dental abnormality, which is mesodermal dysfunction influencing many tissues and organs, CCD was reported by Morand at first in 1766, And later, it was named cleidocranial dysostosis, cleidocranial dysplasia, Marie-sainton syndrome and mutational dysostosis. It is autosomal dominant disorder and there is no prevalence between man and woman. Until recent days, mutation of Runx2 in chromosome6p21 has known to be a main factor causing CCD. The specific clinical features of CCD are aplasia or hypoplasia of one or both clavicles and incomplete closing of fontanels and cranial sutures. Dental manifestations include retention of deciduous teeth, delayed eruption of permanent teeth, supernumerary teeth and cyst. Because there is no mental retardation and physical disability in CCD patients, they usually can not recognize their dental abnormality by the time of abolescence. So, after exfoliation of deciduous teeth, they usually live with edentulous status. It usually drives CCD patients to suffer from esthetic and functional problem. For this reason, CCD patients must be early diagnosed and improved in their appearance as well as masticatory function. So, surgical removal of supernumerary teeth and orthodontic eruption of the natural permanent teeth at adequate time is necessary.

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A STUDY ON THE FEATURES OF MESIODENS AND THE RESOLUTION RATE OF COMPLICATIONS AFTER THE EXTRACTION OF MESIODENS (상악 정중부 과잉치의 양상과 발거 후 병발증 치유율에 관한 연구)

  • Jun, Eun-Min;Kim, Tae-Wan;Kim, Hyun-Jung;Nam, Soon-Hyeun;Kim, Young-Jin
    • Journal of the korean academy of Pediatric Dentistry
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    • v.35 no.2
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    • pp.268-277
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    • 2008
  • Authors evaluated 1171 patients at the department of Pediatric Dentistry in Kyoungpook National University Hospital through clinical records and radiographs. And the following features were studied ; age, sex distribution, number of mesiodens per patients, cause of discovery of mesiodens, location, status of eruption, shape and orientation of crown, complication, dental age of adjacent upper incisor tooth at the time of surgical extraction of mesiodens and the relationship between the resolution rate of complication after extraction of mesiodens and the dental age of adjacent upper incisor tooth, length of diastema, the eruption status of lateral incisor and the crowding status of premaxilla. The followings are the results : 1. The cause of discovery of mesiodens were as follows ; delayed eruption of the permanent incisors in 13.8%, midline diastema in 11.6%, radiographs taken for other reasons in 23.4% and for caries treatment in 15.1%. 2. Complication due to the presence of mesiodens did not occur in 36.8%, delayed eruption of adjacent teeth was observed in 16.1%, midline diastema in 34.4%, rotation in 8.8%, displacement in 2.4%, and crowding in 1.0% of all evaluated patients. 3. As for the dental age of adjacent upper incisor tooth at the time of surgical extraction of mesiodens, below 1/3 of total root length were observed in 3.5%, $1/3{\sim}1/2$ of total root length in 19.9%, $1/2{\sim}2/3$ of total root length in 54.7% and over 2/3 in 21.9% of all evaluated patients. 4. Resolution rate of delayed eruption after the extraction of mesiodens was significant higher in the group with the root length below 1/2. Resolution rate of midline diastema was significant higher in the group with diastema width below 3mm and with non-crowding of adjacent upper incisor teeth.

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ERUPTION DISTURBANCE ASSOCIATED WITH A SMALL ODONTOMA (작은 치아종으로 인한 맹출 장애)

  • Song, Ji-Hyun;Lee, Kwang-Hee;Ra, Ji-Young;Lee, Dong-Jin
    • Journal of the korean academy of Pediatric Dentistry
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    • v.34 no.3
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    • pp.490-497
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    • 2007
  • Odontoma is defined as a benign odontogenic tumor containing enamel, dentin as well as cementum and constitued 22% of all odontogenic tumors. Although the lesions are commonly asymptomatic, they may be discovered routine radiographic examination. Odontomas often cause disturbances in the eruption of teeth such as, impaction or delayed eruption, retention of primary teeth, or abnomalities in the position of the teeth such as tipping or displacement of adjacent teeth. Radiologically, odontomas manifest as a dense radiopaque lesion surrounded by a thin radiotransparent halo. However, in some cases, radiopacity was not quite clear and images of the teeth shadowed very tiny odontomas. And at early development stages of odontoma, calcification remains immature and is difficult to diagnose on radiographs. This suggests that when delayed eruption of the teeth is found, periapical radiographs should be taken to clarify whether any small area of radiopaque material exists. This case report shows tiny odontomas involving an impacted tooth and crowding and we remove the tiny odontoma surgically.

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IDIOPATHIC RETARDED ERUPTION : A CASE REPORT (Idiopathic retarded eruption의 1 증례)

  • Ahn, Myung-Ki;Jeong, Tae-Sung;Kim, Shin
    • Journal of the korean academy of Pediatric Dentistry
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    • v.27 no.2
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    • pp.251-255
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    • 2000
  • The strict meaning of the term retarded eruption is that tooth eruption is delayed compared to its developmental stage. The etiological factors for it may be local, systemic or genetic. Its pathogenic mechanism is unknown in most cases. In cases of generalized retarded eruption without any clear reason, the general growth and development seems normal in all aspects and the teeth usually keep the normal eruption sequence. Usually the primary teeth may often be extracted hoping to provoke the eruption of the retarded teeth, only to be proved a failure. Consequently, the patient will be without teeth for many years, with loss of esthetics, loss of occlusal height and resorption of alveolar process. The primary goal in the treatment may therefore be to keep and maintain the primary teeth in good condition until they are naturally shed. This observation was done on 10 year 1 month old patient who were diagnosed as idiopathic retarded eruption through both radiographic and systemic examination and follow-up observation was done for 11 month.

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Cleidocranial dysplasia : a case report (쇄골두개이골증의 증례)

  • Kim Jae-Duk;Lee Chang-Yul;You Choong-Hyun
    • Imaging Science in Dentistry
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    • v.34 no.1
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    • pp.55-59
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    • 2004
  • Cleidocranial dysplasia is a rare and autosomal dominent disorder characterized by aplasia or hypoplasia of the clavicles, an open fontanelle, dental abnormalities, and short stature, A 17-year-old female who presented with short stature and subsequent delay in eruption of permanent teeth is described. she showed the abnormal hypermobility of the shoulder, ocular hypertelorism and concave nasal bridge. Radiographs revealed the underdeveloped maxilla, defect of the cranium in the fontanelle region, and aplasia of the clavicles. Characteristically, panoramic view revealed near parallel-sided borders of the ascending ramus and downward curvature of the zygomatic arch with hypoplasia. The prolonged retention of deciduous teeth with delayed eruption of permanent teeth and multiple embedded supernumerary teeth were striking. Radiographic and clinical investigations revealed Cleidocranial dysplasia.

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ORTHODONTIC TREATMENT OF MULTIPLE TEETH IMPACTION (다수 영구치의 매복 및 맹출 지연의 교정치험례)

  • Cho, Sa-Hyun;Kim, Soo-Ji;Yang, Kyu-Ho
    • Journal of the korean academy of Pediatric Dentistry
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    • v.24 no.3
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    • pp.651-659
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    • 1997
  • This report presents a case of adolescent patient who had multiple impacted teeth and no systemic disease, and was treated with removable and fixed orthodontic appliances. The results obtained through these cases were summarized as follows : 1. Even in the case without systemic disease, there can be the delayed eruption of multiple teeth 2. If the root formation is not completed, root have no excessive curvature, axial inclination of the tooth is not excessive, and there is eruption space, the tooth can be induced to normal occlusion. 3. Since esthetically proper occlusion and dentition was acquired by recovery of the impacted teeth to normal occlusion, the prosthodontic treatment after extraction of the impacted teeth was less needed. 4. This treatment brought psychological stability to pubertal patient who was interested in his facial profile.

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HIGH-ENERGY SOLAR PARTICLE EVENTS IN THREE DIMENSIONS

  • Kocharov, Leon
    • The Bulletin of The Korean Astronomical Society
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    • v.35 no.2
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    • pp.45.1-45.1
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    • 2010
  • Using SOHO particle and EUV detection and radio spectrograms from both ground-based and spaceborne instruments, we have studied the first phase of major solar energetic particle (SEP) events associated with wide and fast coronal mass ejections (CMEs) centered at different solar longitudes. Observations support the idea that acceleration of SEPs starts in the helium-rich plasma of the eruption's core well behind the CME leading edge, in association with coronal shocks and magnetic reconnection caused by the CME liftoff; and those "coronal" components dominate during the first ~1.5 hour of the SEP event, not yet being hidden by the CME-bow shock in solar wind. At magnetic connection to the eruption's periphery, onset of SEP emission is delayed for a time of the lateral expansion that is visualized by global coronal (EIT) wave. The first, "coronal" phase of SEP acceleration is followed by a second phase associated with CME-driven shock wave in solar wind, which accelerates high-energy ions from a helium-poor particle population until the interplanetary shock slows down to below 1000 km/s. Based on these and other SOHO observations, we discuss what findings can be expected from STEREO in the SOHO era perspective.

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TREATMENT OF MAXILLARY FIRST MOLARS WITH ERUPTION FAILURES (맹출장애를 가진 상악 제1대구치의 치료)

  • Kwon, Soon-Yeon;Kim, Hyun-Jung;Kim, Yeung-Jin;Nam, Sun-Hyun
    • Journal of the korean academy of Pediatric Dentistry
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    • v.36 no.2
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    • pp.281-287
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    • 2009
  • An eruption failure can be observed for child and adolescent periods when the primary dentition is changed to the permanent dentition through the mixed dentition frequently. The eruption failure can lead to miss erupting times of the tooth, then it will cause a lot of problems including root resorption, esthetic problem, transposition of adjacent tooth, malocclusoin and etc. Especially, the maxillary first molar is importantly concerned with occlusion and growth and is an essential tooth for development and maintenance of occlusion. So, it is a momentous part of more proper occlusal management to find these abnormal cases at the early stage and solve the problems. The sorts of eruption failures of the maxillary first molars can be divided into delayed eruption, impaction and the primary retention and the secondary retention. When physical obstacles cause impaction, first of all they must be removed then we can treat the impaction with observation after removal, surgical exposure or orthodontic traction. If the source of impaction is an ectopic eruption, the treatment can be a brasswire, a pendulum appliance, a space maintainer or space regainer after the extraction of the second deciduous tooth and etc. These cases are made a diagnosis of eruption failures of the maxillary first molars in mixed dentition period and have good prognosises after my treatments. So I reported them.

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