• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권1호
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• pp.73-79
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• 2000

A material of 48 patients with 60 avulsed and replanted permanent teeth were followed retrospectively in the period of 1996. 1 to 1998. 12 (mean observation period=1year 7months). The age of the patients at the time of replantation ranged from 9 to 63 years (mean=24 years). Clinical records of patients were reviewed to obtain valid data concerning the extent of injury and treatment provided. Pulpal and periodontal healing states were examined with periapical x-rays and clinical examination procedures (i.e. percussion test and mobility test) at their recall visit. Root ankylosis was found in fifty-two teeth(87%) and root resorption in twenty-four(40%). Only two of the replanted teeth(3%) showed partial regeneration of the periodontal ligament. Six teeth(10%) resulted in tooth loss, but the remaining fifty-four were clinically well functioning. Most of teeth have mild marginal bone loss accompanied by gingival retraction without pathological periodontal pockets. The incidence of root resorption was much higher in younger age group. However, it was not affected by the interval between avulsion and replantation, the condition of supporting tissues, the degree of root formation and the type of splinting, indicating that multiple factors involved in determining the prognosis of replanted teeth. Based on these findings, avulsed teeth in unfavorable conditions (i.e. long extra-alveolar periods, etc.) should be preserved if possible.

• Imaging Science in Dentistry
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• 제45권3호
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• pp.199-203
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• 2015

A 59-year-old male who had suffered from multiple myeloma for nine years and had been administered bisphosphonates for seven years visited a dental hospital for pain relief due to extensive caries in his left maxillary molars. The molars were extracted, leaving an exposed wound for three months. The radiograph showed sequestra formation and irregular bone destruction in the left maxilla. Sudden pain and gingival swelling in the right mandibular molar area occurred six months later. The interseptum of the right lower second molar was observed to be necrotic during surgery. These findings coincided with the features of bisphosphonate-related osteonecrosis of the jaw (BRONJ). In this case, the long intravenous administration of bisphosphonates and tooth extraction were likely the etiologic factors of BRONJ in a patient with multiple myeloma; moreover, the bilateral occurrence of BRONJ is a characteristic feature.

• 구강회복응용과학지
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• 제39권1호
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• pp.52-60
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• 2023

성숙된 치근을 갖는 제3대구치를 이용한 자가치아이식술은 효과적이며, 장기간 높은 성공률 보여주는 것으로 알려져 있다. 자가이식술 이후 생착 여부에 대해 경과 관찰하는 기간동안 치아가 심한 동요도를 보이는 경우, 이를 실패로 간주하고 발치를 하는 것이 일반적이다. 하지만, 이번 증례에서는, 자가치아 이식술 후 치아가 고정이 되지 않아, 구강 외로 탈락되었으나, 시기 적절히 재식을 시도하여 다시 생착을 획득하였고, 1년 이후까지도 성공적인 임상 결과를 보였다. 재식하였지만, 치근 흡수나 골소실도 보이지 않았다. 자가치아이식 후 교합적 문제로 고정을 보이지 않으나, 염증소견이 없는 치아라면 치조와에 재식하는 것이 발치에 앞선 대안이 될 수 있다.

• 한국환경과학회지
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• 제26권4호
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• pp.529-533
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• 2017

Sightings of long-tailed bats have only been recorded twice in Korea, and their morphology and ecology are virtually unknown. We captured a female long-tailed bat in May 2016, in Gangwon Province, and to the best of our knowledge, this has been done for the first time in approximately 30 years. The captured bat had a very small craniofacial area and the length of its tibia was > 19 mm. The wing membrane penetrated the distal portion of the metatarsus of its first toe. The fur of the bat had a lusterless yellowish-brown color and its terminal tail vertebra was free beyond the posterior edge of the uropatagium. It had an obvious lambdoid crest on the lateral side. The anterior and central premolars were located inward with respect to the tooth row. In the mandible, the central premolar was located slightly inward and was nearly 80% of the anterior premolar in height.

• 한국치위생학회지
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• 제19권4호
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• pp.515-524
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• 2019

Objectives: This study aimed to investigate the effects of the amount and duration of smoking on gingival symptoms in adolescents. Methods: We used the web-based survey data of youth health behaviors from 2016 conducted by the Korean Centers for Disease Control and Prevention. The subjects of the study were 67,983 middle and high school students. Data analysis was performed using the SPSS Ver 20.0 program, and complex sample multivariate logistic regression analysis was performed to analyze gingival symptoms according to short- or long-term smoking habits. Results: In subjects with short-term smoking habits, there was no significant difference in gingival symptoms according to the smoking amount. However, after adjusting for socioeconomic characteristics and oral health behaviors in subjects with long-term smoking habits, a heavy smoking amount (${\geq}0.52PY$) had a 1.25 times higher effect than a light smoking amount (<0.52 PY) on gingival symptoms. Long-term heavy smoking (${\geq}0.52PY$) and low daily tooth-brushing frequency in high school students were factors affecting gingival symptoms. Conclusions: When conducting a project on the oral health of adolescents, it is argued that specific investigations and measures should be set up regarding health behavior factors, such as the amount and duration of smoking among adolescents.

• 한국토양동물학회지
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• 제4권2호
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• pp.89-100
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• 1999

捕食線蟲目 (Mononchida)의 4신종을 기재하였다; Iotonchus obtusus sp. n.는 체장이 2.8 mm, a=33, b=4.2, c=61, V=68, 口腔은 61${\times}$45 ${\mu}$m이고, 背部齒는 基部에 있고, 陰門突起가 있으며, 꼬리는 짧고 반원형이며 末端部의 표피는 두꺼운 것이 특징이다. Miconchus valvapapillatum sp. n.는 體長이 2.7-3.6 mm, a=29-36, b=4.1-4.5, c=18.4-21, V=65-69, 口腔은 53-61${\times}$29-33 ${\mu}$m, 交接刺는 132-137 ${\mu}$m, 復中央補助突起는 28-31개이며, 陰門 前後方에 5-8개의 연속적인 돌기를 가지며, 3쌍의 陰門腺이 있다. Clarkus koreanus sp. n.는 體長이 1.1-1.3 mm, a=27.5-28.8, b=3.5-3.9, c=12-14.5, V=60-64, 口腔은 24-28${\times}$13.5-15 ${\mu}$m이고, 口脣部는 잘 區劃졌고, 雙器는 背部齒에 대해서 후방에 있으며, 陰脣을 가진다. Coomansus ulsani sp. n.는 體長이 1.2-1.5 mm이고, a=23.5-26, b=3.4-3.8, c=13.6-14.8, V=65-68, 口腔은 36-39${\times}$21-23 ${\mu}$m이고, 口脣部는 잘 區劃졌고 口腔壁은 1줄의 가는 세로 隆起部가 있다.

• 한국토양동물학회지
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• 제5권2호
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• pp.71-83
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• 2000

포식선충목(Mononchida)의 4신종 및 1 미기록종을 기재하였다. Mylonchulus jinjuensis n. sp.는 체장이 1.8-2.2 mm, 교접자는 58-$67{\mu}{m}$ 이며, 아복부 치는 기부에있고, 진피선과 복부체공이 있는 것이 특징이다. Mylonchulus taeguensis n. sp.는 체장이 1.3-1.8 mm, 교접자는 52-$64{\mu}textrm{m}$이며, 배부치 정점선의 구공 배부벽에 추가적인 작은 치를 가지며, 음문 전후방에 각각 2개의 돌기가 있다. Mylonchulus polynicus는 한국 미기록종으로 보고되며, Princhulus pachydermis n. sp.는 체장이 2-2.3 mm이며, 체벽이 두껍고, 미선과 미선공이 없다. Prionchulus koriensis n. sp.는 체장이 1.7-2.0 mm이며 끝이 뾰쪽하고 신장된 원추형의 꼬리와 미선공이 있는 것이 특징이다.

• 식물분류학회지
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• 제42권2호
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• pp.150-156
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• 2012

작은귀이끼과(Lejeuneaceae)에서 우리나라 미기록 태류식물 6 종을 발견하였다. 거제도에서 생육하는 응달이끼(Archilejeunea kiushiana), 가야산에 생육하는 칼잎이끼 (Drepanolejeunea angustifolia)와 동굴작은귀이끼(Lejeunea otiana), 완도 상황봉 계곡에 생육하는 계곡작은귀이끼(Lejeunea aquatica), 설악산 소청봉 부근에 생육하는 산토끼이끼 (Leucolejeunea japonica) 그리고 가거도에 생육하는 섬이끼(Spruceanthus semirepandus)를 국내 미기록 태류식물로 보고한다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제42권
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• pp.32.1-32.4
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• 2020

Background: Le Fort I osteotomy is a highly effective treatment for skeletal jaw deformities and is commonly performed. High Le Fort I osteotomy is a modified surgical procedure performed for improving the depression of the cheeks by setting the osteotomy higher than the conventional Le Fort I osteotomy. Developments in three-dimensional (3D) technology have popularized the use of 3D printers in various institutions, especially in orthognathic surgeries. In this study, we report a safe and inexpensive method of performing a high Le Fort I osteotomy using a novel 3D device and piezosurgery, which prevent tooth root injury without disturbing the operation field for patients with a short midface and long tooth roots. Results: A 17-year-old woman presented with facial asymmetry, mandibular protrusion, a short midface, and long tooth roots. We planned high Le Fort I osteotomy and bilateral sagittal split ramus osteotomy. Prevention of damage to the roots of the teeth and the infraorbital nerve and accurate determination of the posterior osteotomy line were crucial for clinical success. Le Fort I osteotomy using 3D devices has been reported previously but were particularly large in size for this case. Additionally, setting the fixing screw of the device was difficult, because of the risk of damage to the roots of the teeth. Therefore, a different surgical technique, other than the conventional Le Fort I osteotomy and 3D device, was required. The left and right parts of the 3D device were fabricated separately, to prevent any interference in the surgical field. Further, the 3D device was designed to accurately cover the bone surface from the piriform aperture to the infra-zygomatic crest with two fixation points (the anterior nasal spine and the piriform aperture), which ensured stabilization of the 3D device. The device is thin and does not interfere with the surgical field. Safe and accurate surgical performance is possible using this device and piezosurgery. The roots of the teeth and the infraorbital nerve were unharmed during the surgery. Conclusions: This device is considerably smaller than conventional devices and is a simple, low-cost, and efficient method for performing accurate high Le Fort I osteotomy.

• 융합정보논문지
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• 제10권3호
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• pp.134-140
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• 2020

본 연구의 목적은 노인요양시설 거주 노인과 비거주 노인의 구강건강상태를 비교하는 것이었다. 연령, 성별, 기초생활수급상태가 동일한 469명을 매칭하여 구강건강상태를 비교분석하였다. 노인요양시설 거주 노인들은 시설 비거주 노인보다 치아우식 우병률(p=0.019), 우식영구치수(p=0.001), 상실영구치수(p=0.047)가 더 높았고 충전영구치수(p<0.001)는 더 낮은 것으로 확인되었다. 시설 거주 노인들은 비거주 노인들보다 치아우식에 유병될 확률이 1.93배 더 높았고, 충전치아를 가지게 될 확률은 0.73배였다. 의치를 장착하게 될 확률은 상악이 0.15배, 하악이 0.13배였으며, 의치필요도는 상악이 5.61배, 하악이 5.65배였다. 의치 장착여부 및 필요도에 대한 보정된 오즈비는 모두 유의한 것으로 나타났다. 이 결과를 바탕으로 노인요양시설 거주 노인의 구강건강증진을 위한 구강보건정책 수립을 위한 근거 자료로 활용할 수 있을 것으로 생각된다.