• The Journal of the Korean dental association
• /
• v.55 no.7
• /
• pp.450-456
• /
• 2017

The purpose of this case report is to present a case of free gingival graft for treatment of mandibular incisor labial gingival recession relapsed after laterally positioned flap surgery. A 22 year-old female patient with discomfort and labial gingival recession on left mandibular central incisor was treated. The patient had been treated root coverage on same site by laterally positioned flap surgery, but treated site had relapsed in one month. Exposed root surface was covered by free gingiva from left palatal area. Although gingival color did not completely match with adjacent gingiva, more than 5mm keratinized gingiva was attained. The patient showed no further recurring pain and recession on gingiva after 5 months from the surgery. In conclusion, the root coverage with gain of keratinized gingiva could be achieved through free gingival graft from palate on relapsed gingival recession.

• Journal of the Korean Geosynthetics Society
• /
• v.4 no.3
• /
• pp.3-10
• /
• 2005

This paper aims at investigating the characteristics of discharge capacity according to lateral pressure, hydraulic gradient and deformation of drain materials. A series of experiments were conducted to achieve this objective. In experiments, fiver drain boards as well as harmonica and castle types of drain boards were installed in a rubber membrane, and clay in sully was filled around them. The test results showed that the harmonica type of drain boards have the greatest discharge capacity comparing to castle and fiber drain boards. The results also indicated that the hydraulic gradient has more effect on reduction of discharge capacity than the lateral pressure.

• Water for future
• /
• v.22 no.4
• /
• pp.453-461
• /
• 1989

The analytical diffusion model is first formulated and its characteristics are critically reviewed. The flood events during the 1986-1988 flood seasons i the IHP Pyungchang Representative Basin are routed by this model and are compared with those by the kinematic wave model. The results showed that the analytical diffusion model simulates the observed flood events much better than the analytical kinematic wave model. The present model is proven to be an excellent means of taking the backwater effect due to lateral inflow or down river stage variations into consideration in channel routing of flood flows. It also requires much less effort and computing time at a desired station compared to any other reliable flood routing methods.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2021.06a
• /
• pp.414-414
• /
• 2021

유역 상류의 지표수는 급경사로 인해 빠른 흐름을 나타냄으로써 유역의 저류기능은 하류부에 비해 부족한 형편이다. 또한 광역상수도의 공급이 불가능한 지역이 많아 소규모 급수시설을 이용하여 물공급에 대처하고 있다. 샌드댐은 이와 같은 물공급 소외지역의 저류기능을 높이기 위해 활용될 수 있으며 주된 특성은 증발에 의한 손실 방지와 겨울철 결빙에 따른 대처가 가능하다는 점이다. 본 연구에서는 춘천 물로리 지역을 중심으로 샌드댐의 공급기여도를 평가하기 위해 SWAT-MODLFOW모형을 이용한 수문성분 분석을 수행하였다. 그 결과 연구 지역의 수문성분 중 상당한 양의 측방 흐름이 발생하는 것을 알 수 있었다. 월평균 지하수 함양 분포는 유역의 제한된 지역에서만 발생했고, 토양 유형과 밀접한 관련이 있었다. 전체 지하수 함양량의 약 85 %는 지역의 여름과 봄철에 발생했고 연평균 함양률은 강수량의 약 6 %내외로 저조하였다. 하천과 대수층은 연결성을 나타냈으며 유역 출구 부근에서 하천유출량이 증가하는 양상을 나타냈다. 대수층과 샌드댐 저류지에서 이용 가능한 물의 양은 수위저하를 야기하지 않으면서 약 30m³/일의 물을 공급할 수 있음을 보여주었다. 현재 이 지역의 물 공급 수요는 15.4m³/일임을 감안하면 샌드댐 설치후 이 지역의 공급은 비교적 안정적일 것으로 기대된다.

• Journal of Oral Medicine and Pain
• /
• v.31 no.2
• /
• pp.113-120
• /
• 2006

The purpose of this study was to investigate whether there were any changes in taste sensitivity with oral lichen planus (OLP). Sixty subjects (26 males and 34 females) were included for the study and they were categorized into 2 groups (oral lichen planus 30 persons,control 30 persons), oral lichen planus group was investigated in the department of Oral Medicine, College of Dentistry, Pusan National University from April, 2005 to February, 2006 and control group was investigated in the clinic at Cheongju City from february, 2006 to april, 2006. The electrical taste thresholds were measured using an electrogustometer of the 4 different sites (tongue tip, tongue lateral, circumvallate papilla and soft palate) in oral cavity. The results were as follows; 1. The electrical taste threshold showed a tendency to decrease in the OLP group. 2. The electrical taste threshold showed a tendency to decrease in female group, but showed a tendency to increase in male group of the OLP group. 3. The electrical taste threshold showed a tendency to increase in tongue tip, tongue lateral of the multiple OLP group, but showed a tendency to decrease in circumvallate papilla, soft palate of the multiple OLP group. 4. The electrical taste threshold showed a tendency to increase in tongue tip, tongue lateral of the acute OLP group, but showed a tendency to decrease in circumvallate papilla, soft palate of the acute OLP group. 5. After treatment, electrical taste threshold was significant lower in soft palate of the OLP group than control group. 6. After treatment, NAS was significantly lower in soft palate of the OLP group than control group.

• The Journal of Korean Academy of Prosthodontics
• /
• v.48 no.2
• /
• pp.87-93
• /
• 2010

Purpose: The purpose of this study was to compare the retention of the two denture adhesives with a silicone edentulous model and a resin denture base in vitro study. Material and methods: The experimental groups were used two denture adhesives and classified into 5 subgroups each. Subgroups were divided by the number of times the saliva sprayed. The control group was used synthetic saliva only. Dislodging tensile strengths were applied to the resin denture base using Instron in 3 directions ; vertical, lateral, and anterior-posterior. Results: The retention of two denture adhesives was increased significantly than saliva alone (P <.05). In each denture adhesives, the retention of saliva sprayed first was decreased than denture adhesive alone, but it didn't have significant differences. Whenever saliva sprayed repeated, the retention was decreased significantly than saliva sprayed first (P <.05). In each denture adhesives, vertical retentive force was highest than lateral and anterior-posterior retentive forces, and anterior-posterior retentive force was higher than lateral retentive force. This results were significantly different (P < .05). Significant differences of the retentive ability among two denture adhesives were not observed. Conclusion: From the results, use of the denture adhesives resulted in improved retentive ability of denture. Especially retentive force was highest in vertical direction.

• Progress in Medical Physics
• /
• v.16 no.3
• /
• pp.125-129
• /
• 2005

The first step in the commissioning procedure of a treatment planning system is always verification of the basic beam data. In this work, we have measured POD curves and beam profiles between 1 $\times$ 1 cm$^{2}$ and 40 $\times$ 40 cm$^{2}$ . In an attempt, Pinnacle 7.4f detect discrepancies between predicted dose distribution and delivered dose distribution. The discrepancies between measurement data and caculation data was found. The delivered dose was underestimated in field but overestimated out of field. The D$_{max}$ depth of 1 $\times$ 1 cm$^{2}$ was reduced about 2 mm. For the larger field size ($\geq$4$\times$4 cm$^{2}$, the beam profile and PDD curve showed good agreement between measurement data and calculation data.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• v.11 no.2
• /
• pp.29-39
• /
• 1989

Ossifying fibroma is a relatively slow growing tumor, and likely to have presented for some years before its clinical diognosis. The usually well circumscribed nature of ossifying fibroma in jaws lends itself to relative ease of excision and hence the favorable therapeutic results. On occasion, however, particulary in juvenile patient, if maxilla the tumor assumes an aggressive behavior. In that case, because the tumor grows invasively, resection with a margin of healthy tissue is indicated. The case presented is 34 - year old female. The patient had noticed a gradual swelling of the right side of the face approximately 2 months in duration correlation with a intermittent pain on the right maxillary molar area. Palpation disclosed firm swelling on the right anterior and lateral walls of the maxillary sinus extended to the maxillary tuberosity area. The radiographic examination revealed soft tissue mass with multiple dense round calcifications with destruction of anterior and posterolateral wall of the right maxillary sinus and right alveolar process, and hard palate. The mass totally obliterated maxillary sinus and extended to the pterygopalatine fossa. The histologic diagnosis from the biopsied specimen revealed ossifying fibroma. The tumor mass was resected by subtotal maxillectomy procedure due to a recent rapid infiltrative growth. In 5 months of postoperative follow - up period, the patient has favorable prognosis.

• Journal of the Korean Society of Radiology
• /
• v.17 no.6
• /
• pp.957-964
• /
• 2023

This study focused on hand sanitizer as a medium that can replace ultrasonic gel, which is vulnerable to contamination by bacteria that reside on the hand. Hand sanitizer produces a strong sterilization effect from germs resident on the hands through different sterilization principles depending on the ingredients. Select products of gel type, cream type, and foam type, except for liquid type with low viscosity, and ultrasonically apply one 62% ethanol gel type and one cream type, one benzalkonium chloride 0.066% cream type and one foam type, respectively. Using ATS-539 as a medium, image evaluation was performed on the axial and lateral resolution and penetration depth, and the presence or absence of an air layer between the probe and the phantom. As a result, in the evaluation of the axial and lateral resolution and the depth of penetration, all four experimental groups met the evaluation criteria. However, in the case of the foam type, although it was suitable for the evaluation criteria of resolution and penetration depth, dark shadows appeared on both sides except for the center of observation during image evaluation. Through this experiment, it was possible to confirm the possibility that the remaining three types of hand sanitizers except the foam type could replace the ultrasonic gel.

• Journal of the Korean Geotechnical Society
• /
• v.27 no.2
• /
• pp.63-72
• /
• 2011

The measured ground water behavior by TDR (time domain reflectometer) sensors were analyzed by the data filtering technique such as moving average method and Fourier transform, and the ground water level and unsaturated zone were tried to be determined numerically. At first, the variation of TDR data according to the saturation degree was measured by lab test, which is translated as a function of saturation degree. Then, changes of ground water level and lateral seepage in field conditions were simulated using acrylic pipe, and the measured data were analyzed to make calibration curve. Furthermore, TDR sensors were installed into the in-situ embankment to insure the field application. The saturation degree, unsaturated and dried zones were determined from the measured data.