• 대한구강악안면병리학회지
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• 제42권6호
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• pp.183-187
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• 2018

The supernumerary tooth which is extra tooth in comparison to normal dentition is one of the developmental problems. The most common type of supernumerary tooth is mesiodens which may cause several complications like delayed eruption, crowding, spacing et al. Moral Incisor Hypomineralization (MIH) describes the clinical appearance of enamel hypomineralization of systemic origin affecting one or more permanent first molars that associated frequently with affected incisors. We report a case of a 6 - year - old boy who visited our clinic for removal of mesiodentes. The patient was diagnosed by mesiodentes and MIH by clinical examination and radiographic examination. Under local anesthesia, Mesiodentes were removed surgically. The demarcated opacities, a feature of MIH, were observed in the removed mesiodentes. After removal of mesiodentes, the maxillary central incisors erupted normally and in order to manage the teeth affected MIH, follow-up and fluoride varnish application were done every 3 months.

• Imaging Science in Dentistry
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• 제38권2호
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• pp.103-107
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• 2008

Purpose: The purpose of this study was to evaluate the relationship between the position of mesiodens and its complications. Materials and Methods: The subjects for this study consisted of 172 patients with mesiodens. Panoramic radiographs and cross-sectional tomography were taken of all of the subjects. Their clinical records and radiographs were analyzed in order to study the direction and vertical and sagittal position of mesiodens, as well as complications caused by mesiodens. Results: The number of mesiodens was one in 112 cases (65.1%) and two in 60 cases (34.9%). Complications were found in 121 mesiodentes (52.2%), with being median diastema the most frequent. The incidence of complications was high in erupted mesiodens (75.0%), in horizontal mesiodens (89.8%) and in mesiodens located within the arch (75.7%), but was low in mesiodens impacted above apex (29.8%), in normal position (34.4%) and in palatally positioned mesiodens (46.5%). Conclusion: It was suggested that the frequency of complications was different according to the vertical position, the direction of the crown and the sagittal position.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제34권4호
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• pp.445-449
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• 2008

Unerupted or erupted supernumerary tooth may cause crowding, diastema, cyst formation, resorption, and displacement or rotation of adjacent teeth. However, there are few studies about prognosis about the pathologic condition and expectation of spontaneous eruption. The object of this study is to evaluate factors predicting the spontaneous eruption of supernumerary tooth. 431 patients (346 males and 85 females, aged from 5 to 29 years) who visited our institution from 2002-2006 and were shown to have 471 mesiodentes was reviewed. Supernumerary teeth were classified inverted and not inverted state. In case of not inverted supernumerary tooth, eruption rate ac cording to length of supernumenary tooth, width of the tooth, angle between the tooth and incisor tooth, location (inside the incisor or not) and shape (conical or tubercle) were investigated. The regression model showed that length, width and angle were all important determinants of influencing the eruption of supernumerary tooth (p < 0.001, Pearson R: 0.619). There is no relation between shape and eruption of supernumerary tooth (p > 0.05). Location of mesiodens has an effect on eruption of supernumerary tooth (p < 0.01).

• 대한소아치과학회지
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• 제34권4호
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• pp.646-650
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• 2007

2003년 4월부터 2006년 4월까지 안양 지역에 위치한 개인 소아치과 병원에 내원한 환아 7038명을 대상으로 임상적, 방사선학적 검사를 통해 성별, 상악 정중과잉치의 수, 치관의 형태와 위치, 치관 방향을 조사하여 다음과 같은 결론을 얻었다. 1. 과잉치를 가진 환아는 239명으로 3.40%(총 241명, 3.42%)에 해당하였고 총 289개의 과잉치가 있었다. 2. 과잉치는 1개 있는 경우가 191명으로 가장 많았고, 2개 있는 경우도 48명 있었으며, 3개 이상 있는 경우는 없었다. 3. 상악 정중과잉치는 3.2:1로 여아보다 남아에서 호발하였다. 4. 과잉치는 왼쪽에 있는 경우가 55.4%로 약간 더 많았고, 모양은 원추형, 방향은 역위형이 가장 많았다. 5. 하악 정중과잉치는 2명에서 관찰되었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제27권1호
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• pp.46-53
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• 2001

The prevalence of supernumerary teeth is between $1{\sim}3%$. Of these, $90{\sim}98%$ occur in the maxilla with particular predilection for the premaxilla, preceded by mandibular third premolars, mandibular forth molars and maxillary paramolars. The most common ones occur in the maxillary anterior region, they may occur singly between the central incisors(mesiodens), or they may be double(mesiodentes). Maxillary anterior supernumeraries may erupt into the oral cavity or remain unerupted. It is found that approximately 25% are erupted, while the rest are unerupted. They are usually a small tooth with a cone-shaped crown and a short root. They may cause delayed eruption, median diastema, bodily displacement or rotation of the adjacent permanent teeth. Occasionally they may lead to the developement of dentigerous cyst or primordial cyst, or eruption into nasal cavity. In this study, 109 supernumeraries surgically extracted from premaxilla in 84 patients are analysed. The results are as follows : 1. Sex distribution of male and female is 2.2 : 1. 2. Almost cases are in pediatric age from 5 to 12 years old (87%). 3. Problems with supernumeraries are tooth malpositon, diastema, delayed eruption, eruption to nasal cavity and cyst formation. 4. Of 109 supernumeraries, 16(15%) are erupted into oral cavity, 92(84%) are impacted, and 1(1%) is erupted into nasal cavity. 5. Of 84 patients, 59(70%) have one supernumeray while 25(30%) have two supernumeraries. 6. Of 109 supernumeraries, 96(88%) are found within the region of the central incisors. 7. Of 109 supernumeraries, 94(86%) are vertically impacted, 11(10%) are horizontally impacted, 3(3%) are labiopalatally impacted and 1(1%) is impacted in nasal cavity. 8. Of 84 patients, we used palatal flap in 67(80%), labial flap in 6(7%), both flaps in 4(5%) and no flap in 7(8%). And incisive nerve was cut in 33(49%) of 67 palatal flaps. 9. Extration with ostectomy was done in 72 supernumeraries(66%), without ostectomy in 37 teeth(34%). 10. Extraction with tooth sectioning was done in 21 supernumeraries(19%), without tooth sectioning was done in 88 teeth(81%). 11. We used local anesthesia in 70 patients(83%) and general anesthesia in 14 ones(17%).

• 대한소아치과학회지
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• 제35권3호
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• pp.548-555
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• 2008

함치성 낭종은 치근단 낭 다음으로 가장 흔한 치원성 낭종으로 치관완성 후, 미맹출된 치아의 법랑질과 퇴축 법랑 상피 사이에 액체가 축적되어 발생한다. 함치성 낭종의 약 95%는 영구 치열에서 발생하지만, 과잉치와 연관된 함치성 낭종은 그 발생이 드물어, 전체 함치성 낭종 중 5-6%를 차지한다. 이러한 함치성 낭종은 호발 연령이나 성별의 관점에서 보면, 일반적인 함치성 낭종과 비슷한 특징을 가진다. 과잉치와 연관된 함치성 낭종의 대부분이 상악 정중 과잉치와 관련하여 발생하는 것으로 알려져 있다. 상악 정중 과잉치에서 발생한 함치성 낭종의 합병증은 상악 정중 과잉치의 합병증과 유사한데, 인접 영구치의 맹출 장애, 치근 흡수, 전위, 회전과 정중이개, 인접 치아에 의한 낭종의 이차적 감염 등이 있다. 상악 정중 과잉치에서 발생한 함치성 낭종의 치료법으로는 과잉치와 과잉치를 둘러싼 낭종을 함께 적출하는 방법과 낭종이 정상 치아와 근접한 경우, 과잉치를 제거한 뒤, 조대술을 통해 낭종의 크기를 감소시킨 후 제거하는 방법이 있다. 과잉치와 낭종 적출 후, 변위된 인접 치아의 자발적 맹출 및 맹출 경로 변화가 관찰되기도 하나, 만약 그렇지 못한 경우에는 변위된 치아의 교정적 견인 및 부가적인 교정적 처치가 필요하다. 함치성 낭종과 과잉치 각각에 관한 연구는 많이 행해졌으나, 이 두 발육 장애가 연관된 증례에 대한 보고는 상대적으로 드물다. 본 증례에서는 유치열기와 초기 혼합 치열기 아동에서 상악 정중 과잉치에 함치성 낭종이 관찰되어 과잉치와 낭종의 제거 후, 정기적 검진시 비교적 양호한 결과가 관찰되었기에 이를 보고하는 바이다.