• 구강회복응용과학지
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• 제20권2호
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• pp.143-150
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• 2004

Endosseous implants have been used to provide anchorage control in orthodontic treatment without the need for special patient cooperation. However these implants have limitation like space requirement, cost, equipments. Recently titanium micro-implant for orthodontic anchorage was introduced. Micro-implants are small enough to place in any area of the alveolar bone, easy to implant and remove, and inexpensive. In addition, orthodontic force application can begin almost immediately after implantation. The mandibular first, maxillary first, mandibula second, and maxillary second molars were the four most commonly missing teeth in adult sample. In case of posterior molar teeth missing, deflective contacts in any position, over time, has produced pathologic change of occlusal scheme because of extrusion of opposing teeth. This case had interocclusal space deficiency by mandibular right molars missing over time. The micro-implants had been used for intrusion of maxillary right molars for interocclusal space. The micro-implant would be absolute anchorage for orthodontic movement. Therefore, the micro-implant would be effective method for correction of occlusal plane.

• Imaging Science in Dentistry
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• 제39권4호
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• pp.209-212
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• 2009

Bifid mandibular canal can be an anatomic variation. This condition can lead to complication when performing mandibular anesthesia or during extraction of lower third molar, placement of implants and surgery in the mandible. Four patients underwent preoperative imaging for extraction of third molars using CBCT (CB Mercuray, Hitachi, Japan). The axial images were processed with CBworks program 2.1 (CyberMed Inc., Seoul, Korea). The branches for supplying the lower third molar were identified mainly on cross-sectional and panoramic images of CBCT. Since the location and configuration of mandibular canal variations are important in any mandibular surgical procedures, we report 4 cases of bifid mandibular canal with panoramic and the CBCT images.

• 동의신경정신과학회지
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• 제20권3호
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• pp.237-247
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• 2009

Objectives : Tremor is increasing recently especially among senior citizens. In this case, the patient who had mandibular tremor caused by trauma, was not improved by western medicine. We tried to apply Oriental medical treatment. Methods : We treated the patient with acupuncture therapy and herbal medication and measured the frequency of the tremor, Jaw expression of Abnormal Involuntary Movement Scale(AIMS) and Visual analog scale. Results: After treatment symptom of mandibular tremor was decreased significantly and other symptoms such as insomnia disappeared. Conclusions : During the admission days symptoms are decreased in contentment. This result suggests that Oriental medical treatment has good effect on tremor.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권2호
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• pp.298-307
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• 1996

Osteochondroma is a common benign tumor of the axial skeleton, especially the distal metaphysis of the femur and the proximal metaphysis of the tibia, however, is occurred rarely on the facial skeleton. Development of the tumor is most frequently seen in the second or third decades of life. Typically, it arises directly from the cortex of the underlying bone, without any intervening zone of abnormal osseous tissue, and is covered by a cap composed of cartilage undergoing calcification. In case of osteochondroma of the mandibular condyle, its clinical features are occulusal change, facial asymmetry, headache, pain and click on temporomandibular joint, mouth opening limitation, and jaw deviation to involved site. This is a case report of a 13-year old woman who had mouth opening limitation and severe temporomandibular joint pain. We obtained successful results with surgical removal of the osteochondroma on the mandibular condyle.

• Journal of Species Research
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• 제6권spc호
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• pp.185-214
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• 2017

The genus Phyllopodopsyllus T. Scott, 1906 is nearly cosmopolitan and contains around 60 valid species, but has not been previously recorded in Korea. One of the reasons is probably the paucity of research in marginal habitats, such as marine interstitial. I describe two new species here. Numerous specimens of both sexes of P. kitazimai sp. nov. were collected from a beach near Yeongdeok, while only two females of P. busanensis sp. nov. were collected from a beach near Busan. The new species differ in numerous macro-morphological characters, such as the segmentation and armature of the antennula, armature of the mandibula, maxillula, maxilliped, and the first three swimming legs, as well as the shape of the caudal rami and the female genital field. However, they show very little difference in the number and position of cuticular organs (pores and sensilla) on all somites, which might prove these rarely used micro-characters to be useful in the reconstruction of phylogenetic relationships in this group of harpacticoids. Both species have their closest relatives in Japan. Phyllopodopsyllus kitazimai is morphologically most similar to P. punctatus Kitazima, 1981, but can be distinguished by much longer third exopodal segments of the third and fourth swimming legs. Phyllopodopsyllus busanensis shares the largest number of morphological similarities with P. setouchiensis Kitazima, 1981, but can be distinguished by shorter caudal rami. A key to species is also provided.

• 대한치과보철학회지
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• 제30권1호
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• pp.15-24
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• 1992

The purpose of this study was to analyze the mandibular asymmetry of the patients with the temporomandibular dysfunction. In this study, 20 dental students aged between 22 and 27 years, Chosun University, who did not possess any restoration and symptoms like the temporomandybular joint click, pain, and opening limitation of the mandible were selected as the normal group. And 80 patients who were analyzed into the patients with the temporomadibular dysfunction(TMD) were divided into group I as the internal derangement and group II as external derangement. Both the normal group and the TMD Group were faked submento-vertex cephalogram by routine methods after that the unilateral mandibular length(L) and the amount of mandibular asymmetry and deviation were measured and analyzed. The results were as follows : 1, Unilateral mandibular length(L) of the normal group and the TMD group were $112.7{\pm}10.20mm\;and\;102.65{\pm}8.10mm$ respectively (P<0.01). 2. The amount of mandibula asymmetry of the normal group and the TMD group were $5.95{\pm}4.63mm\;and\;5.68{\pm}4.35mm$ respectively (P<0.5). 3. The amount of mandibular deviation of the normal group and the TMD group were $6.00{\pm}4.07\;and\;4.67{\pm}3.40mm$ respectively (P<0.3). 4. In the TMD group, unilateral mandibular length(L) in the affected site and the non-affected site were $102.73{\pm}8.68mm\;and\;102.53{\pm}7.68mm$ respectively (P<0.5).

• Imaging Science in Dentistry
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• 제40권2호
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• pp.75-81
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• 2010

Purpose : This study is aimed to evaluate the position of mandibular foramen of mandibula prognathism patients using 3-dimensional CT images in order to reduce the chance of an anesthetic failure of the mandibular nerve and to prevent the damage to the inferior alveolar nerve during the orthognathic surgery. Materials and Methods : The control group consist of 30 patients with class I occlusion. The experimental group consist of 44 patients with class III malocclusion. Three-dimensional computed tomography was used to evaluate the position of the mandibular foramina. Results : The distance between mandibular plane and mandibular foramen, class I was 25.385 mm, class III was 23.628 mm. About the distance between occlusal plane and mandibular foramen, class I was 1.478 mm, class III was 5.144 mm. The distance between posterior border plan of mandibular ramus and mandibular foramen had not statistically significant. About the distance between sagittal plane of mandible and mandibular foramen did not also showed statistically significant. Conclusion : The result of this study could help the clinicians to apprehend more accurate anatomical locations of the foramina on the mandible with various facial skeletal types. thereby to perform more accurate block anesthesia of the mandibular nerve and osteotomy with minimal nerve damage. In addition, this study could provide fundamental data for any related researches about the location of the mandibular foramina for other purposes.

• 대한치과교정학회지
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• 제31권6호
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• pp.559-566
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• 2001

본 연구는 설측 이소맹출된 하악 제2대구치의 협측 반대교합을 개선하기 위해 사용되는 mandibular posterior crossbite appliance에 의해 하악 제2대구치의 치근단과 그 주위의 치조골에 발생되는 응력분포를 알아보기 위해 광탄성법을 이용하여 분석하였다. 하악의 치조골을 재현하기 위해 PL-3 형의 epoxy resin과 PL-3 보다 경질인 레진치아를 사용하여 설측 이소맹출된 하악 제2대구치를 광탄성모형으로 재현하였다. 광탄성 모현상에 mandibular posterior crossbite appliance를 적용하고 힘을 가하기 전과후의 응력 분포를 알아보기 위해 원형편광기 를 사용하여 모형의 전후방에서 관찰하였다. 이상의 연구를 통해 얻어진 결과는 다음과 같다. 1. 하악 제2대구치의 협측면에 힘을 가한 경우, 설측 치조정과 치근첨 부위에 응력이 집중되어 나타났고 회전중심이 치근 협측면의 중간 1/3부위와 치근첨 부위에 발생하였으며 이로 인해 제 2대구치에 협측으로의 비조절성 경사이동 및 회전력이 발생하였다. 2. 하악 제2대구치의 설측면에 힘을 가한 경우에는 협측면에 힘을 가한 경우 보다 치근첨에 더 많은 응력이 발생하였다. 또한 치근하방의 치조골 부위에 응력이 증가하였으며 치근의 협측면과 치근첨 부위의 회전중심도 없어져 이로 인한 협측으로의 조절성 경사 이동 및 함입력이 관찰되었다. 3. 하악 제2대구치의 협측이나 설측에 힘을 가한 경우, 고정원인 제1대구치의 치근첨 부위는 힘을 가하기 전의 초기 응력상태와 비교할 때 응력의 증가는 보이지 않아 구치부 협측 반대 교합의 개선시 하악의 설측 호선은 효과적인 고정원으로 사용될 수 있다. 이상의 연구 결과는 설측 이소맹출된 하악 제2대구치의 구치부 협측 반대교합을 개선하기 위해 사용되는 mandibular posterior crossbite appliance를 적용할 때, 제2대구치의 협측면보다는 설측면에서 힘을 부여하는 것이 교합장애를 야기시킬 수 있는 비조절성 경사이동과 구치의 회전을 피하면서 협측으로의 조절성 경사이동 및 함입력을 적용시킬 수 있음을 의미한다.