• Natural Product Sciences
• /
• 제26권4호
• /
• pp.268-278
• /
• 2020

In this study, we investigated the chemical profile and effects of RW0117 (Artemisia argyi 65 .5 % ethanol extract) on gastric lesions in rats. We optimized and validated a method to obtain the chemical profile of RW0117. We then investigated the antioxidant and anti-inflammatory effects in vitro, and the protective effects on gastric lesions in vivo. The IC50 of 2,2-diphenyl-1-picrylhydrazyl free radical scavenging considering the antioxidant effects of RW0117 was 166.55 ㎍/mL, and the IC50 of nitric oxide scavenging considering the anti-inflammatory effects was 41.16 ㎍/mL. Oral administration of RW0117 at lower concentrations (25, 50, 100 mg/kg) had similar or greater effects than the daily intake conversion concentration (115mg/kg) of a health functional food (Avexol®) in the acetic acid-induced ulcer and the ethanol-induced gastric injury rat models. In addition, oral administration of RW0117 increased the expression of prostaglandin E2, which enhances the protective effect in the gastric mucosa in the ethanol-induced gastric injury rat model. These results suggest that RW0117 may have potential therapeutic uses in the protection of the gastric mucosa.

• 대한두개안면성형외과학회지
• /
• 제18권3호
• /
• pp.218-221
• /
• 2017

A solitary fibrous tumor is a relatively uncommon neoplasm that usually occurs in the pleura but occurs extremely rarely in the oral cavity. Reported herein is a rare case of a solitary fibrous tumor in the buccal cheek mucosa. A 50-year-old man visited the authors' hospital due to a buccal cheek mass whose size had increased. Excisional biopsy was done under local anesthesia. After the excisional biopsy, the patient was diagnosed to have a solitary fibrous tumor. In immunohistochemistry, the patient's solitary fibrous tumor was characterized by the expression of CD34 and CD99 on the neoplastic cells, and negativity for Bcl-2 and S-100. No recurrence or complication occurred for a period of 5 years. The growth of a primary solitary fibrous tumor in the buccal cheek mucosa is extremely rare and has been rarely reported in the South Korean medical literature. A solitary fibrous tumor must be distinguished from other spindle cell tumors. Presented herein is a case of primary solitary fibrous tumor in the buccal cheek mucosa. The relevant literature is briefly reviewed.

• 치과방사선
• /
• 제17권1호
• /
• pp.7-20
• /
• 1987

The author studied the acute reaction of cobalt-60 irradiation to buccal mucosa in rats and difference of the effects of single versus fractionated exposure. 195 Sprague Dowley strain rats, weighing about 120gm, were used in this experiment. 3 rats served as controls and the remaining 192 rats were divided into six groups of 32 rats each. Experimental group Ⅰ, Ⅱ, Ⅲ were received a single dose of 15Gy, 16.5Gy, 18Gy and group Ⅳ, Ⅴ, Ⅵ were received two equal sized fractionated dose of 9Gy, 9.75Gy, 10.5Gy at 4 hour intervals, respectively. The experimental groups were irradiated with cobalt-60 teletherapy unit, Picker model 4M 60 (Field size, 12x5 cm, SSD, 50㎝, Dose rate, 222cGy/min, Depth, 1㎝). The animals were sacrificed at 1, 2, 3, 6, 12 hours, 1, 3, 7 days after irradiation and the changes of the irradiated buccal mucosa were observed by electron and light microscopy. The results were as follows: 1. A single exposure was more damaging than fractionated exposure, and as the radiation dose increased, the changes of cell organelles became faster, but the healing of radiation-induced damage in fractionated exposure was faster than in single exposure. 2. The radiation-induced changes of the basal cells were the most prominent in 18Gy-single exposure group, and the least in 18Gy-fractionated exposure group. 3. Electron-microscopically, there appeared nuclear changes, swelling of mitochondria and rough endoplasmic reticulum, decrease of free ribosome, presence of vesicles, widening of intercellular space, and loss of basal lamina. The early remarkable changes were partly loss of nuclear membrane and swelling of mitochondria. 4. Light-microscopically, derangement and pyknosis of basal cells, hydropic changes of spinous cells, enlargement of granular cells, indistinctness of basement membrane, and proliferation of epithelium were observed.

• Journal of Oral Medicine and Pain
• /
• 제22권1호
• /
• pp.125-135
• /
• 1997

The Author examined the clinical and histological changes on the dorsal tongue mucosa of the adult rats after lasing by pulsed Nd:YAG laser and incising with scalpel. The dorsal tongue was lased through 320$\mu\textrm{m}$optic fiber moving 2.5mm/second to make linear incision 5mm. The five conditions of lasing were three application with 1.0W, 1.75W, 3.0W and 3.0W under saline cooling, and single application with 3.0W at 20Hz. With scalpel, linear incisions through the surface epithelium were performed to 5mm in length. After observing the clinical changes of the incised wounds, the animals were sacrified and the tissues were excised to make the tissue specimens. The stained microscopic tissue slide were observed histologically under the microscope. The following results were obtained : 1. While incision with scalpel causes severe bleeding, lasing does not cause bleeding. 2. In three applications with 1.75W and 20Hz, tissue ablation was limited to areas contacted with optic fiber. 3. In three applications with 3.0W and 20Hz, deep incised wound, extensive destruction of the adjacent epithelium and charring were observed. 4. In three applications with 3.0W and 20Hz under saline cooling, tissue ablation was limite to the superficial mucosa and charring was not observed. 5. In single application with 3.0W and 20Hz, the shape of the incised wound was similar to that of the scalpel incision.

• 치위생과학회지
• /
• 제12권5호
• /
• pp.493-502
• /
• 2012

본 연구는 제2형 당뇨병 환자가 인식하고 있는 구강건강 문제를 파악하고, 당화혈색소와 주관적 구강건강상태와의 연관성을 제시함으로써 당뇨병 환자의 전신 및 구강건강증진을 위한 기초자료를 제시하고자 시행하였다. 2012년 1월 9일부터 2012년 3월 9일까지 만 40세 이상 제2형 당뇨병을 가진 환자 174명에게 설문지 조사와 $In2it^{TM}$을 이용하여 당화혈색소를 측정한 결과 다음과 같은 결론을 얻었다. 1. 연구대상자의 구강건강문제를 파악한 결과 구강점막질환 증상 중 '입 안 점막에 염증이 있다'와 '입 안 점막이 아프다', 치주질환 증상 중 '칫솔질 시 잇몸에서 피가 난다', 구강건조증 증상 중 '평상시 내 입 안은 마른다고 느낀다'를 가장 많이 인식하는 것으로 나타났다. 2. 일반적 특성에 따라 주관적 구강건강상태를 분석한 결과, 특히 당뇨병 유병기간이 길수록 입안점막질환과 치주질환의 증상 및 구강건조증 증상을 더 많이 인식하는 것으로 나타났다(p<0.05). 3. 혈당 조절을 위한 건강행동에 따라 당화혈색소 수준을 분석한 결과, 규칙적인 식사를 잘 실천하는 집단에서 당화혈색소 수준이 더 낮은 것으로 나타났다(p<0.01). 4. 주관적 구강건강상태에 따라 당화혈색소 수준을 분석한 결과, '혀에 타는 듯한 느낌이 있다', '칫솔질 시 잇몸에서 피가 난다', '잇몸이 치아 뿌리 쪽으로 내려갔다' 및 '입에서 나쁜 냄새가 난다'를 인식한 집단에서 당화혈색소 수준이 더 높았다(p<0.05). 또한 구강건조증 증상 중 '나는 목이 말라 자다가 일어나 물을 마신다'에 응답한 집단에서 당화혈색소 수준이 더 높았다(p<0.05). 특히 다중선형회귀분석 결과 치주질환 증상은 당화혈색소와 3번째로 강한 연관성을 보인 요인으로 나타났다. 이상의 결과로 볼 때 혈당조절 정도는 다양한 구강건강문제와 관련성이 있으므로 당뇨병 환자를 대상으로 구강관리 프로그램의 적용을 더욱 강화하고, 의료인력의 협진을 통해 구강 내 당뇨합병증을 최대한 감소시켜야 할 것이다.

• Journal of Dental Anesthesia and Pain Medicine
• /
• 제20권2호
• /
• pp.95-99
• /
• 2020

Various dental procedures, such as injection administration, surgical treatment, and endodontic treatment, can cause injury to the nerves. The most commonly injured nerves are the inferior alveolar and lingual nerves. This can manifest as altered sensation to the area of innervation of the injured nerve, such as the lower lip, chin, teeth, tongue, and mucosa. Altered sensations or loss of sensation are relatively infrequent complications in daily dental practice. Here, we report an uncommon case of altered sensation in the midfacial region caused by an endodontic procedure and discuss the need to consider local dental causes in the differential diagnosis of numbness in the facial region.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제17권1호
• /
• pp.82-89
• /
• 1995

The Stevens-Johnson syndrome is a severe form of erythema multiforme associated with multiple organ involvement that can result in severe mortality. There are many etiologic factors including drugs, infection, or stress ; but accurate pathogenesis is still obscure. Treatments are composed of the removal of possible etiologic factors, symptomatic and supportive treatment. We experienced a case of Stevens-Johnson syndrome with involvement of generalized skin, oral mucosa, and eye involvement. This patient was treated by symptomatic and preventive method including corticosteroid, antihystamine, and opthalmic treatment.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제44권5호
• /
• pp.207-211
• /
• 2018

Among different graft materials for craniofacial reconstruction, calcium phosphate cements have the advantages of alloplastic grafts and wide use. The authors report a case of foreign body reaction following frontal reconstruction with JectOS (an injectable calcium orthophosphate cement; Kasios) and reviewed the literature on complications of this material after craniofacial reconstruction from 2002 to 2017. Complications were categorized into two groups: immunologic reactions (consisting of seroma collection, chronic sinus mucosa swelling, and foreign body reaction) and non-immune events (infection, fragmentation, and ejection). It is wise to use calcium phosphate-based material only in selected cases with small defects, and long-term follow-up is needed to observe their consequences.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제18권1호
• /
• pp.120-124
• /
• 1996

The postoperative maxillary cyst develops as a delayed complication after surgical intervention or Caldwell-Luc operation in the maxillary sinus and was also reported that it could occur after Le Fort I osteotomy. This is also called as surgical cliated cyst because of its lining epithelium is usually lined by a pseudo-stratfied ciliated columnar epithelium. This report represents a case of postoperative maxillary cyst which developed within the anterior of maxilla and in association with nasal mucosa 6 years after a Le Fort I osteotomy. In 1989, 26-year-old male complained of his mandibular prognathism and underwent orthogmathic surgery, Le Fort I osteotomy, bilateral sagittal split ramus osteotomy, partial glossectomy.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제47권3호
• /
• pp.233-236
• /
• 2021

A mandibular continuity defect can be repaired using either a prosthetic device or autogenous bone. A titanium reconstruction plate can be used with a localized or vascularized flap over the defect of the mandible. Unfortunately, the plate may fail due to plate exposure, screw loosening, fracture, or infection, and will need to be removed. Plate exposure though the skin or mucosa is one of the main reasons for failure. In the present work, the authors introduced a lingually positioned reconstruction plate fabricated via three-dimensional printed bending support. This custom reconstruction plate can avoid plate re-exposure as well as reduce surgical errors and operation time.