• 대한소아치과학회지
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• 제34권4호
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• pp.694-699
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• 2007

정상적인 맹출 시기는 종족, 인종, 성별과 개인적인 요소에 의해 결정되며, 만약 정상적인 맹출 시기에서 두드러지게 벗어날 경우 맹출 지연이라고 한다. 영구치의 맹출 지연 원인은 다양하며, 발생 시 치열 및 악궁에 부정적인 영향을 줄 수 있어 조기진단 및 치료가 중요하다. 본 증례들에서는 치아종 및 치아발육부전 그리고 낭종으로 인한 맹출지연을 보이는 각각의 환자에 대해 맹출 방해 인자의 제거와 맹출 공간의 형성 및 유지만으로 자발적 맹출을 이룰 수 있었기에 보고하는 바이다.

• 대한소아치과학회지
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• 제50권4호
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• pp.469-482
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• 2023

This study aimed to investigate the treatment options for the delayed eruption of mandibular premolars and identify the predictors of spontaneous eruption using panoramic radiography. The prevalence of delayed mandibular premolar eruption in this retrospective analysis, comprising 254 patients (aged 9 - 15 years), was 5.19%, with no significant difference based on gender. The mandibular second premolars were most affected (4.39%) compared to the first premolars (0.76%). No significant difference in prevalence was observed between the left and right sides. Among the treated mandibular premolars, primary molar-related lesions were identified as the leading cause (7.85%) of delayed tooth eruption. The treatment duration varied based on the Nolla stage, eruption stage, and treatment method. Teeth with Nolla stage 7 or lower had a treatment duration of 22.89 ± 11.96 months, whereas those with stage 8 or higher had a 15.02 ± 6.34 month duration. The deeper the tooth was located in the bone, the longer the treatment period became. The treatment duration varied depending on the treatment method, and statistically, there was no significant difference. The treatment durations for affected mandibular premolars increased with the depth of impaction angle of inclination. In this study, the treatment duration for delayed eruptions varied depending on the Nolla stage, eruption stage, and treatment method. Variations in the impaction depth and inclination angle across various treatment approaches, as explored in this study, might offer valuable insights into the selection of the most suitable management options for delayed tooth eruptions.

• 대한소아치과학회지
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• 제21권2호
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• pp.555-560
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• 1994

Among the permanent teeth. the first permanent molars play the greatest role in occlusion and function. So, the congenital missing, abnormal reuption or abnormal formation of the first permanent molars in the course of arch development would inflict normal development of dental arches. Therefore, early detection of abnormal cases related to first permanent molars and understanding of current and predictable clinical problems are essential for proper occlusal guidance in children. With the aim of investigating the clinical patterns of delayed eruption of first permanent molars in children, panoramic tomograms of the childern in mixed and early permanent dentition were observed and analyzed. The results were as follows: 1. Among the delayed eruption of first permanent molars, on tooth or bilateral teeths were affected most frequently. Delayed eruption was more prevalent in maxilla than in mandible. 2. The formation of tardily erupted teeth were also delayed. 3. Delayed eruption was generally limited in first molars or molar segments. 4. Delayed eruption of first permanent molars is accompanied by abnormal position of tooth germs, for example, ectopic eruption, delayed dental age, delayed localized tooth formation and generalized congenital missing. 5. There was a tendency of delayed formation or congenital missing of second molars distal to tardily erupted 1st molars. And that was more marked in maxilla than in mandible. 6. There was reported that affected 1st molars show various size and shapes. Maxillary 1st molars showing delayed eruption showed a tendency of having 3 cusps. But, tardily erupted mandibular 1st molars showed no significant reduction in mesiodistal dimension, as reported. 7. In some cases, the delayed eruption of 1st permanent molars was associated with ectopic eruption, but their formation was not usually retarded. 8. In skeletal class III cases, there showed a tendency of mandibular 1st molars to erupt earlier than maxillary 1st molars with greater interval than in normal occlusion.

• 구강회복응용과학지
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• 제33권2호
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• pp.127-134
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• 2017

전신적 혹은 국소적 원인에 의해 발생하는 치아맹출지연은 대부분 소아기에 발견되어 교정적 정출을 이용한 치료를 진행한다. 하지만 소아기때 치료를 받지 못하고 성인기로 될 경우, 교정에 의한 치아이동이 어려워지기 때문에 보철수복으로 치료를 변경할 수 있다. 보철계획을 결정하기 전 고려사항으로는 치아상실이 나타난 범위, 치아사이 근원심공간 및 악간공간, 환자의 연령대 등이 있다. 이 논문에서는 상하악 구치부 맹출지연환자를 지르코니아 부분 고정성 보철물을 통해 구강회복한 증례를 소개하고자 한다.

• 대한소아치과학회지
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• 제35권2호
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• pp.339-344
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• 2008

상악 영구 견치의 매복에 비해 하악 영구 견치의 매복은 매우 드물게 일어난다. 치아가 매복된 경우 장애물 존재 여부와 매복 위치와 방향, 맹출 가능한 공간의 유무, 치근의 형성 단계 등의 요소에 따라 매복 치아의 발거 혹은 장애물의 제거 후 주기적 관찰, 맹출이 지연된 치아의 외과적 노출, 교정적 견인 등의 방법으로 치료하게 된다. 본 증례는 하악골의 골절 부위에 시행된 골간 강선 결찰과 미니 플레이트에 의해 하악 좌측 견치가 매복되어 있었던 경우로 CT 검사 결과 하악 정중부위 플레이트의 스크류가 맹출을 방해하고 있는 것으로 판단되어 전신 마취 하에 플레이트를 제거하였다. 이후 자연적인 맹출을 기대하였으나, 맹출력이 부족하여 교정적 견인으로 양호한 결과를 얻었기에 보고하는 바이다.

• 대한치과의사협회지
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• 제50권6호
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• pp.304-311
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• 2012

Eruption of the teeth can be disturbed by crowding, ectopic eruption path, retention for pathologic condition of follicle and periodontal ligament, local disturbances in the innervation, and delayed eruption for overlying obstacles in the eruption path. Eruption disturbance of permanent posterior teeth is taken with diverse therapeutic approaches according to the patient age, cooperation of patient, tooth position and maturity, degree of impaction, clinical features, and repercussion on the neighboring teeth. However, delayed treatment usually results in less favorable outcomes. Therefore, In order to prevent this situation, periodically radiographic examinations during the early mixed dentition period and early diagnosis of eruption disturbances of permanent posterior teeth are recommended.

• 대한소아치과학회지
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• 제11권1호
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• pp.91-101
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• 1984

The purpose of this study is to determine what influence the lesion and the premature loss of mandibular 1st deciduous molar have on the eruption of its successor, and the author devided 580 cases of orthopantomograms from age 3 to 9 years old children into 3 groups: Control Group: both side normal Study I Group: one normal and the other lesion. Study II Group: one normal and the other premature loss before 8 years old. and observed the amount of differences and the relative position in eruption between study-tooth successor and normal-tooth successor, The following results were obtained: 1. The differences in eruption between right and left mandibular 1st primary molars of Study Group were greater than those of Control Group. 2. The successors of lesioned-teeth showed more accelerated eruption than the antimeres in 40.9% and more delayed, in 22.7%. 3. The successors of premature lost-teeth showed more accelerated eruption than the antimeres in 61.7% and more delayed, in 4.3%.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제31권2호
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• pp.173-179
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• 2009

Dentigerous cyst is an odontogenic cyst which occurs in unerupted tooth crown. After the crown formation, enamel epithelium remnants surrounded continuously proliferates and it forms effusionfluid cyst and expands due to increased internal osmotic pressure. Treatments of cysts are mainly enucleation, marsupialization and de-compression. When deciding the way of treatment, the age of a patient, the anatomical circumstances, the region of lesion and the size of cyst should be considered. Marsupialization is that some parts of internal cystic wall would be converted into oral mucosa if the cyst is large size and is concerned about neighboring anatomic structure. It can be accompanied by enucleation later and eruption of related tooth can be possible. If there is a limitation of spontaneous tooth eruption, eruption of tooth can be induced by orthodontic apparatus. There were 3 patients had dentigerous cyst and underwent marsupialization, their impacted teeth had preserved and had induced eruption, all showing satisfactory results.

• 대한소아치과학회지
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• 제34권1호
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• pp.13-18
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• 2007

맹출 중인 치아는 오랜 기간 동안 이동하는 과정에서 주위의 여러 요인들, 즉 유치의 조기 상실, 과잉치, 국소적 병소, 혀, 입술, 저작근, 외상 등에 의해서 다양한 영향을 받을 수 있다. 이러한 여러 요인들이 작용할 경우 치아의 정상적인 맹출 과정이 방해를 받게 되어 치아의 맹출 장애를 초래할 수 있다. 본 연구에서는 서울대학교 치과병원 소아치과에 2004년 1월 2일부터 2005년 12월 31일까지 신환으로 내원한 환자들, 총 8,010명의 주소를 분석하였고, 맹출 장애를 보이는 환자는 전체의 8.79%를 보였다. 맹출 장애의 유형은 맹출 지연이나 조기 맹출, 이소 맹출로 분류할 수 있었고, 맹출 지연이 가장 많이 나타난 치아는 상악 중절치이며, 조기 맹출이 호발한 치아는 하악 유중절치이고, 이소 맹출이 가장 많이 나타난 치아는 상악 제1대구치였다.

• 대한장애인치과학회지
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• 제13권2호
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• pp.91-94
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• 2017

본 증례는 다발성 과백악질증 및 영구치의 맹출 지연을 나타내는 뇌성마비 병력 환자에 대해 보고이다. 현재 환자는 큰 불편감 없이 유구치를 유지하고 있으며 방사선 사진 검사를 통해 매복 영구치의 낭종 발생 여부를 확인하고 잔존 유치를 최대한 보존해야 한다.