• 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.

• 대한소아치과학회지
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• 제40권4호
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• pp.342-345
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• 2013

최근 학술정보를 보다 체계적으로 관리하고, 세계화하려는 노력들이 범국가적인 차원에서 진행되고 있으며, 이에 따라 다양한 기관에서 학회지의 국제화를 위한 노력을 지원하고 가이드라인을 만들어 제시하고 있다. 학술지가 세계화되기 위해서는 온라인 심사 시스템의 도입과 학회지에 쉽게 접근할 수 있는 웹싸이트의 개설 그리고 학술지의 영문화가 필요하며, 또한 이에 걸맞는 연구자들의 윤리 의식도 뒷받침 되어야 한다. 본 글을 통하여 저자는 현재 대한소아치과학회지의 실태를 점검해보고, 앞으로 우리 학회가 지향해야할 바를 점검해 보았다.

• 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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• 제30권3호
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• pp.477-482
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• 2003

하악과두부는 하악골에서 자주 발생하는 골절부위 중의 하나로 특히, 하악골의 성장이 완성되지 않은 소아의 경우 하악과두골절이 적절히 치료되지 않으면 안면 기형, 악관절 강직종, 부정교합, 그리고 하악골 발육이상 등을 초래할 수 있다. 소아에서의 하악과두골절의 치료목적은 동통없이 악기능을 정상적으로 회복시켜 악안면골의 성장발육을 정상적으로 유도하는 것이다. 치료방법의 선택은 환자의 나이, 골절된 위치, 골절부위의 이물질의 유무 등에 의해 이루어지나 소아의 경우 가능한 한 비수술적, 기능적 치료가 선호된다. 본 증례에서는 activator를 이용한 하악과두골절의 기능적 요법을 시행하고 골절부위의 기능적 재형성을 유도하면서 10개월간 관찰해 본 결과, 골절 부위의 동통 감소, 정상적 교합관계의 회복, 최대개구량의 증가, 하악의 편위 감소 등의 기능적 회복을 보였고 특이한 자각증상을 보이지 않았다. 소아에서 하악과두골절의 처치법으로 activtor를 이용한 기능적 치료는 동통없이 악기능을 회복시키고, 정상적인 교합관계로 유도할 수 있을 것으로 사료된다.

• 대한소아치과학회지
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• 제51권1호
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• pp.55-65
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• 2024

This study aimed to assess the accuracy of tooth widths, intermolar widths, and arch lengths acquired through two intraoral scanners, including iTero Element Plus Series (Align Technology, Santa Clara, CA, USA) and Trios 4 (3Shape, Copenhagen, Denmark), specifically on mixed dentition. A total of 30 subjects were divided into 2 groups, each undergoing both alginate impressions and intraoral scanning using either the iTero or Trios scanner. The plaster models were measured with a caliper, while the digital models were measured virtually. In the iTero group, all tooth width measurements exhibited differences compared to the plaster values, except for maxillary left lateral incisors (p = 0.179), mandibular right (p = 0.285), and left (p = 0.073) central incisors. The Trios group did not display significant differences in any of the tooth width measurements. Intermolar width comparisons for both groups indicated differences, except for mandibular primary canine to primary canine values (p = 0.426) in the iTero group. Regarding arch length, the mandibular anterior, maxillary right, and left arch lengths in the iTero group demonstrated larger caliper values than those of iTero. Conversely, in the Trios group, all parameters showed smaller caliper values, especially in upper anterior, maxillary right, mandibular right, and mandibular left arch lengths with significance (p = 0.027, 0.007, 0.003, and 0.047, respectively). Despite the differences between the two groups, digital models might be clinically suitable alternatives for plaster models. Pediatric dentists should carefully assess these differences, as a comprehensive evaluation would result in precise orthodontic treatment planning and favorable outcomes for young patients with mixed dentition.

• 대한소아치과학회지
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• 제38권3호
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• pp.270-275
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• 2011

섬유성이형성증은 골격 계통의 국소화된 양성 발육장애로서 해면골 내에서 섬유조직이 증식되며 불규칙한 골소주가 형성되는 질환이다. 섬유성이형성증의 두개안면부 병소는 안면동통, 두통, 두개비대칭, 안면기형, 치아이동, 부정교합, 시각이상, 청각이상 등의 증상이 나타날 수 있다. 본 증례는 섬유성이형성증으로 진단된 혼합치열기 환아로서 이환 부위에서 영구치의 맹출지연이 관찰되었다. 병소에 이환되지 않은 환아의 하악 좌측 측방 치열군은 교합위까지 맹출을 완료하였으나 병소에 이환된 하악 우측 측방 치열군은 현재 치조골 내에서 느린 속도로 맹출 중이며 치근 형성이 완료되지 않아 계속 경과 관찰 중이다. 맹출이 정지되었다고 판단될 시 상부 치조골 제거를 통한 맹출유도나 교정적 정출을 고려할 수 있을 것이다.

• 대한소아치과학회지
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• 제24권4호
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• pp.771-775
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• 1997

Ectopic eruption is defined as abnormal eruption and results in malpositioned teeth and abnormal root resorption of adjacent teeth. Ectopic eruption, first reported by Chapman, occurs in 3% of the population and that mostly in the maxilla. Etiologic factors include narrow maxilla, large maxillary teeth, retarded calcification of the first molar, inclined eruption path of the first molar and retruded position of the maxilla. Impaction of the second molar is rare and occurs mostly in the mandible. Major causes are large teeth and insufficient arch length. Halterman has devised a method of distalizing a ectopically erupting first molar by cementing a band on the second deciduous molar with a hook soldered and a button bonded to the occlusal surface of the first permanent molar. Ectopically erupted posterior teeth should be treated early to maintain normal development of the dentition, harmony of facial growth and occlusal support, a failure to do so could result in severe malocclusion, periodontal damage and continued root resorption of the adjacent teeth. Early detection and treatment is thus vital. The author is submitting this report as he has obtained favorable results in treating a patient who came to the SNUDH Dept. of Pediatric Dentistry complaining of the first molar by using a modified Halterman appliance.

• 대한소아치과학회지
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• 제25권3호
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• pp.499-505
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• 1998

Idiopathic gingival hyperplasia is a rare condition of undetermined etiology. The enlargement is usually associated with the emergence of the teeth into the oral cavity and may regress after extraction. The enlarged gingiva may be primarily attributed to hyperplasia of the subepithelial layer that is relatively avascular and consists of densely arranged collagen bundles and numerous fibroblasts. The recommended time for treatment is after completion of eruption of permanent teeth. But the most important thing is the patient's psychological and esthetic needs. Lately, Schluger has proposed modified gingivectomy procedure with horizontal, internal beveled incision for thinning of the flap resulting in less pain and bleeding after treatment, minimal opportunity of infection. The purpose of this report is to document a case of 8-year-old girl who had registered in Dept. of Pediatric Dentistry of Seoul National University dental hospital for treatment of her gingival hyperplasia and delayed tooth eruption

• 대한소아치과학회지
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• 제51권2호
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• pp.165-175
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• 2024

This study aimed to investigate the effects of blood contamination on the Vickers hardness and the surface morphology of premixed MTA and compare them with the effects on conventional MTA. The Vickers microhardness of Endocem MTA Premixed Regular (EP) and ProRoot MTA (PM) was assessed after immersion in fetal bovine serum (FBS) and saline. Stem cells from human exfoliated deciduous teeth (SHED) were seeded on MTA after immersion in FBS, saline, and deionized water (DW). Cell adhesion patterns and surface morphology were visualized via scanning electron microscopy (SEM). The surface microhardness of EP and PM in FBS was lower than in saline. However, short-term exposure of PM to FBS did not reduce the microhardness compared to saline. Angular crystals formed in water, while rounded crystals with more air voids appeared in FBS. Favorable SHED attachment occurred in all groups. Overall, the surface hardness of EP and PM decreased after FBS exposure, although PM was less influenced. We suggest minimizing the amount of bleeding when using MTA clinically; nevertheless, PM remains an option with more expected blood contamination than EP. In summary, exposure to FBS decreased mechanical performance but allowed cell adhesion for both MTAs, with PM being more resistant to these changes.

• 대한소아치과학회지
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• 제24권3호
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• pp.543-548
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• 1997

The first permanent molar takes important place in the occlusion. Malposition of the lower first molar is frequently due to mesial migration, which is occurred by early exfoliation of the second deciduous molar or proximal caries of deciduous teeth. Above things happen without any consideration of space maintainer, prompt measures for space regaining have to be started. Especially in the case with early loss of the second deciduous molar, it has been said that there is no suitable appliance for maintaining the space before the eruption of the permanent first molar. In distalizing the upper first molar, headgears have been routinely used, which its result was definitely depended on cooperation of the patients. Nowadays, appliances such as pendulum appliances, K-loop, magnets, which can be used without cooperation of the patients, are introduced. Jones Jig, one of the molar distalizing appliances, was used on the patients who visited department of pediatric dentistry in Seoul National University Dental Hospital complaining of no eruption space for the lower second bicuspid. Either removable splint or lingal arch was used as the anchorage. Jones Jig was favorably used in the lower molar, where vestibule is shallow, and this is a case report on the satisfactory result thereof.