• Imaging Science in Dentistry
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• 제33권4호
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• pp.217-221
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• 2003

Purpose : To evaluate the use of the vertical tube shift from a panoramic film and a periapical film to localize unerupted maxillary incisors and supernumeraries. Materials and Methods : The total of 103 displaced maxillary incisors or embedded supernumeraries were examined in this study. The vertical tube shift technique with panoramic and periapical radiography by normal projection taken and compared to localize the position of the embedded maxillary incisors or supernumeraries by a radiologist and 5 general dentists. The gold standard used for the radiographic comparisons was the true position of the embedded tooth as confirmed by horizontal tube shift technique using three periapical radiographs. The general dentist examiners were instructed on the use of the modified acronym 'SLDOBU' by the radiologist as it pertains to panoramic radiographs as the principle of vertical tube shift. Results: All of the embedded maxillary incisors and supernumeraries were successfully located using the vertical tube shift from a panoramic and a maxillary anterior periapical radiograph by the radiologist and 5 general dentists. Conclusion: The use of a panoramic film with a periapical film combination for a vertical tube shift can be useful to localize unerupted maxillary incisors and supernumeraries.

• 대한소아치과학회지
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• 제25권3호
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• pp.613-618
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• 1998

A dentigerous cyst is an epithelium-lined sac that surrounds the crown of an impacted, embedded, or unerupted tooth. Many surgical procedures have been described for the elimination of dentigerous cyst, but they can be devided into two basic group: enucleation and marsupialization. Marsupialization is a conservative technique which allows the reduction or elimination of a cystic lesion by making it an accessory compartment to the oral cavity and it is the best way to conserve a tooth affected by dentigerous cyst and to permit its eruption, especially in young patient. After using marsupialization to treat dentigerous cyst associated with the crown of unerupted premolar in young patient, the results were as follows: 1. Reduction of bony expansion and rapid bone regeneration without infection and recurrence were observed. 2. Normally spontaneous eruption of involved teeth were permitted, as well as loss of affected tooth was avoided. 3. Follow-up examinations revealed no complication and recurrence.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제15권2호
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• pp.105-112
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• 1993

좌측 상악 구치부와 협부의 무통성 종창을 주소로 내원한 16세 여자의 좌측 상악동에서 다량의 석회화 침착과 미맹출지를 포항한 COC 1예를 구내 접근법을 통해 외과적으로 제거하였다. 적출물은 $50{\times}40{\times}35mm$의 크기였고 낭종벽으로 잘 피낭되어 있었다. 조직학적으로는 잘 발달된 상피 내벽과 ghost cell이 나타나 COC의 소견을 보였으며 석회화물은 complex odontoma의 양상을 보여 COC의 type IB로 분류되었다. 술후 1년이 지난 현재 안모의 개선을 나타내고 있으며 재발의 증상 없이 양호한 경과를 보여주고 있다.

• 대한소아치과학회지
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• 제27권4호
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• pp.564-572
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• 2000

치아매복에 의한 미맹출시 치아 매복의 방향과 위치 치근단의 완성정도, 맹출공간의 존재여부, 매복치 주변에 과잉치, 치아종, 낭종 등의 존재여부 등에 따라 발치, 교정적 견인, 외과적 자가이식중 어떤 술식을 시행할 것인지 결정하게 된다. 자가 치아이식은 치아의 위치가 교정력을 가할 수 없는 위치에 존재하거나 치아이동이 제한을 받게 되어 통상적인 치료가 불가능할 경우에 발거에 앞서 고려할 수 있다. 자가치아이식의 예후는 치근의 완성도, 외과적 시술능력 환자의 나이, 근관치료, 고정기간과 형태, 치주인대의 보존, 저장 방법 등에 영향을 받는다. 특히 이식 수여부의 골의 결손이 너무 클 경우 치아의 동요도를 감소시키고 골치유를 빠르게 하기위해 골이식을 고려할 수 있다. 치아 미맹출을 주소로 본원에 내원한 증례들로 상악과 하악의 여러 부위에서 과잉치, 치아종, 이소맹출 등의 다양한 원인요소들이 발견되었다. 자가치아이식전 필요시 공간확보를 행하고, 과잉치 및 치아종의 발거로 인해 골결손이 클 때, 탈회냉동건조골과 자가골 이식을 시행하였다. 치아고정은 $2\sim3$주정도 시행하고 $3\sim4$주 후 방사선적 검사와 임상검사후 근과치료의 필요성을 결정하고 정기적인 검사를 시행한 결과 치근흡수소견 등의 비정상적인 소견은 보이지 않고 정상적인 치유소견을 관찰할 수 있었다.

• 치과방사선
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• 제13권1호
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• pp.139-143
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• 1983

A 18-year-old man had a painless swelling in the right anterior portion of maxilla for 2 years. On radiographic examination, a radiolucent region that was not associated with an unerupted tooth was seen. Small scattered radiopaque foci were seen in the cystic lumen. At second case, a 16-year-old girl had a painless swelling in the anterior portion of maxilla for 3 years. On radiographic examination, a radiolucent region that associated with an unerupted tooth was seen. Multiple scattered radiopaque foci were seen in the radiolucent cystic lumen. With the patient under local anesthesia, well encapsulated tumors were enucleated. The diagnosis made in the pathologist's report was Adenomatoid Odontogenic Tumor, benign lesion often having distinct clinical and radiographic features.

• Imaging Science in Dentistry
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• 제43권4호
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• pp.295-301
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• 2013

The author experienced 8 cases of pericoronal radiolucency involving an incomplete tooth crown that had not developed to form the cemento-enamel junction, and the underdeveloped crown sometimes appeared to be floating within the radiolucency radiographically. The first impression was that these cystic lesions had odontogenic keratocysts, but half of them turned out to be dentigerous cysts histopathologically. There has been no report concerning odontogenic cysts involving an incompletely developed crown. The purpose of this paper is to report that dentigerous cysts may develop before the completion of the cemento-enamel junction of a developing crown.

• Imaging Science in Dentistry
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• 제40권2호
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• pp.89-91
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• 2010

Impaction of tooth is a situation in which an unerupted tooth is wedged against another tooth or teeth or otherwise located so that it cannot erupt normally. The supernumerary tooth is also called as hyperdontia and defined as the condition of having additional tooth to the regular number of teeth. The most common supernumerary tooth is a mesiodens, which is a mal-formed, peg-like tooth that occurs between the maxillary incisors. The supernumerary tooth is commonly impacted but they are frequently impacted on maxilla. Ectopic impaction of supernumerary tooth on mandibular condyle, coronoid process, ascending ramus, and pterygomandibular space is very rare condition. In this case, we report a case of impacted supernumerary tooth on mandibular sigmoid notch without definite pathologic change.

• 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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• 제25권2호
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• pp.268-276
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• 1998

낭종은 환자의 연령, 낭종의 종류 및 위치에 따라 치료방법을 선택하는 것이 바람직하며, 환자의 연령이 어린 경우에는 조대술을 통하여 낭종에 이환된 치아를 가능한 보존시키는 것이 바람직한 것으로 생각된다. 낭종에 포함되었던 치아는 조대술로 낭종을 제거후에 생리적인 맹출이 이루어지는 것을 관찰할 수 있었으며 기능도 정상적으로 수행하는 것으로 판단된다. 그러나, 조대술을 이용하여 시술한 후에는 맹출된 치아에 병리조직이 잔존되어 재발의 가능성이 있으므로 주기적인 관찰이 요구될 것으로 생각된다.

• 대한치과의사협회지
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• 제10권3호
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• pp.169-171
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• 1972

Mr. yoon, 1 20 years old man, in good health, was treated for unhealing the extraction wound, pus discharge and sensation of dull pain on maxillary 2nd molar areas. Roentgenographic examination showed unerupted 3rd molar in left maxillary sinus. The tooth was located immediatly under the zygomatic bone and directed to median line. Radical operation of its sinusitis and extraction of the impacted wisdom tooth were performed by Caldwell-Luc's operation technique. In morphological aspects, the tooth has resemblance to normal wisdom tooth.