• The Journal of the Korean dental association
• /
• v.42 no.6 s.421
• /
• pp.414-421
• /
• 2004

Sjogren syndrome is a chronic systemic autoimmune disorder that chiefly involves the salivary gland and the lacrimal gland, resulting in xerostomia and xerophthalmia. Although the exact cause of the disease is not early diagnosis, treatment and observation must be emphasized because of its poor prognosis, such as the high occurrence of malignant lymphoma and other autoimmune disease that may be accompanied. In the present case, a twenty-year-old woman whose chief complaint was multiple dental hard tissue loss and xerostomia, which was misdiagnosed as iron deficiency anemia at first, but through re-evaluation and differential diagnosis it was Sjogren syndrome. the diagnosis approach was discussed in this report, suggesting that Sjogren syndrome should be considered as a differential diagnosis in a with xerostomia.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.33 no.1
• /
• pp.42-46
• /
• 2017

Dental erosion is defined as tooth structure loss by acidic chemical substance. It is caused by extrinsic factors such as acidic foods, drugs, and working environments, and also intrinsic factors such as gastric acid regurgitation in gastro-esophageal disorder or intensive vomiting in bulimia nervosa. These lesions can be treated with direct resin filling, laminate or full contour crown depending on the intensity of clinical problem. This is a case report about treatment of rare clinical case: labial erosion of anterior tooth caused by frequent intake of acidic fruit and palatal erosion of anterior tooth caused by intensive vomiting in bulimia nervosa.

• The korean journal of orthodontics
• /
• v.33 no.6 s.101
• /
• pp.475-483
• /
• 2003

The purpose of this study is to evaluate hard and soft tissue changes following the subapical osteotomy in bimaxillary dentoalveolar protrusion patients requiring maximal retraction adult female patients was selected. Surgical procedures were performed by the same surgeon, anterior subapical osteotomy techniques were employed on the maxilla and cephalometric radiograms were traced and superimposed using the best-fit method and two reference The results were as follows 1. The bodily movement of the maxillary anterior segment was achieved in a posterior moved posteriorly with a slight correction of the lower incisors. 2. The horizontal soft tissue measurements changed significantly after treatment, but Nt and Sn vertical soft tissue measurements indicated that Ls moved inferiorly and Li superiorly. 3. The correlation between hard and soft tissue changes indicated that ${\Delta}HId/{\Delta}HLi,\;{\Delta}HId/{\Delta}LL-Eline,\;{\Delta}Hpt.B/{\Delta}HILS,\;and\;{\Delta}UI-FH/{\Delta}NL$ were significant. 4. More lower lip relative to upper lip retraction was demonstrated in relation to Rickett's E-line. The ratio between upper lip displacement was $50\%$, and between the lower incisor and lower lip displacement was $60\%$. We conclude from the results that the anterior subapical osteotomy is an efficient treatment severe dentoalveolar protrusion and desire rapid results.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.31 no.4
• /
• pp.617-623
• /
• 2004

Acidic drink has been known as a cause of tooth erosion. The purpose of this study is to verify the acid levels of orange juices in market and evaluate the erosion effects on the enamel of deciduous teeth by orange juices in relatively short period of time. With four kinds of orange juice selected from market, pH, buffering capacity and concentration of Ca and P ion were measured. And forty segments of normal enamel of deciduous incisors were divided into four groups and level of erosion was measured by surface hardness test before and after soaking at 50ml of orange juice for 10 minutes. The results of this study showed that the average pH of orange juices was 4.0 and this pH value was so acidic as to cause the tooth erosion. There were differences in small quantity for each group of teeth, however, the result was statistically so significant that orange juices can cause enamel erosion in relatively short period of time.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• v.11 no.2
• /
• pp.11-18
• /
• 1989

Advancement of surgical techniques has made it necessary to accurately diagnose internal derangements. Arthrography and computerized tomography have been used to diagnose the majority of temporomandibular joint disorders, however, these methods have had their disadvantages. Magnetic resonance imaging utilizing surface coils has greatly improved the ability to diagnose meniscus abnormalities without using intrarticular injections or ionizing radiation. Ninety-two patients (184 joints) were evaluated by means of magnetic resonance imaging(MRI). Thirty-one patients (39 joints) were diagnosed as having meniscus perforation. Retrospective review of fifteen patients (20 joints) with a perforated meniscus diagnosed by magnetic resonance imaging pre-operatively demonstrated a sixty-five percent correlation between the radiographic diagnosis and the surgical findings.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• v.13 no.1
• /
• pp.82-87
• /
• 1991

Hemifacial microsomia is a term used to describe a facial anomalies caused by the defect of anatomic structures originated from the first and the second branchial arches. The defect area encompasses some facial areas including mandible, facial muscles, masticatory muscles, cranial nerves, auricles, etc., and the degree of manifestations of the anomalies is extmely diverse. A 20-year-old man complaining of facial asymmetry and malocclusion visited our hospital. An orthognathic surgery was performed for the correction of hard tissue anomalies and then autogenous dermis-fat autotransplantation was done for the improvement of remaining soft tissue defect. The result was esthetically good and the case was presented here.

• Journal of Oral Medicine and Pain
• /
• v.15 no.1
• /
• pp.9-25
• /
• 1991

타액의 유동학적 성질은 타액의 윤활작용 및 구강내 경조직, 연조직 보호작용에 영향을 미친다. 그러므로 타액의 유동성을 잘 이해하면, 구강내 기능적 불편감의 평가와 인공타액의 개발에 필요한 중요한 정보를 얻을 수 있다. 저자는 전단율 변화에 따른 타액점도 변화의 연령 및 성별에 따른 차이를 알고자, 각 연령층별로 구강건조증으로 고통받은 병력이 없으며 타액채취시 약물을 복용하고 있지 않은 남녀 각 20명씩 총 240명을 대상으로 자극시 분비된 타액의 점도를 cone-and-plate 형태의 점도계를 이용하여 전단율 11.3에서부터 450.0(/sec )사이에서 측정하였다. 또, 20대 남녀 각각 20명의 경우, 자극시 분비 된 전타액의 점도와 함께 비자극시 분비된 전타액, 자극시 분비된 이하선 타액, 자극시 분비된 악하선 설하선 혼합타액의 점도를 같은 방법으로 측정한 결과 다음과 같은 결론을 얻었다. 1. 타액은 점탄성의 성질을 가지는 non-Newtonian 유체로서 점도와 전단율 사이의 관계는 점근선으로 표시될 수 있었다. 2. 자극시 분비된 전타액의 점도는 연령이 높을수록 증가된 양상을 보였으나, 남자의 경우 50대 이상에서 가장 높고 여자의 경우 30대에서 가장 높았다. 3. 자극시 분비된 전타액의 점도는 20대, 30대, 40대에서 여자가 남자보다 높았다. 4. 타액 점도는 자극시 분비된 악하선 설하선 혼합타액에서 가장 높았으며, 비자극시 분비된 전타액, 자극시 분비된 전타액, 자극시 분비된 이하선 타액 순이었다.

• The korean journal of orthodontics
• /
• v.36 no.2 s.115
• /
• pp.136-144
• /
• 2006

The purpose of this study was to determine whether association exists between temporomandibular joint (TMJ) characteristics in transcranial radiographs and TMJ internal derangement and to evaluate the validity of transcranial radiographs in diagnosis of internal derangement. Transcranial radiographs and magnetic resonance imaging (MRI) of 113 TMJs from 76 subjects were used for this study and all TMJs were classified into 3 groups according to the results of MRI: normal disk position, disk displacement with reduction, and disk displacement without reduction. Transcranial analysis included linear measurement of joint spaces and condylar head angle measurement. To determine any relationship between transcranial measurements according to disk displacement, one-way ANOVA was used. The results showed that condyle-fossa relationship in standard transcranial radiographs had no relationships with disk displacement. And, as disk displacement progressed, condylar angle between head and neck increased significantly. This result can be interpreted that condylar head angle reflects structural hard tissue change according to internal derangement progress. But this is insufficient in the determination of internal derangement. Therefore, although still clinically helpful, the validity of standard transcranial radiographs to diagnose TMJ internal derangement was questioned.

• The korean journal of orthodontics
• /
• v.38 no.2
• /
• pp.104-120
• /
• 2008

Purpose: The purpose of this study was to assess the hard and soft tissue changes associated with mandibular bilateral sagittal split osteotomy and genioplasty. Methods: This is a retrospective study of 40 patients who underwent either bilateral sagittal split osteotomy for mandibular setback (BSSO group, n = 20) or in combination with advancement genioplasty (Genio group, n = 20). Lateral radiographs, were taken before and immediately after surgery, and at least 6 months after surgery. Results: Comparing hard and soft tissue changes between the BSSO group and Genio group, there were significant differences in the lower incisor, soft tissue B point (B'), and soft tissue Pogonion (Pg') (p < 0.5). The mean ratio of hard and soft tissue changes for B/B', Pg/Pg', and Menton/soft tissue Menton after surgery in the BSSO group was 0.997, 0.965, and 1.022 respectively, and 0.824, 0.602, and 0.887 respectively in the genio group. Significant differences were found between the two groups. There were significant differences in lip thickness (B-B', Pg-Pg') in the Genioplasty group between pre and postsurgery, but not in the BSSO group. Pogonion to Labrale inferior and B' had a correlation coefficient of 0.833, 0.922, respectively for the BSSO group, and 0.775, 0.799 for the Genio group. Conclusions: The results indicate that there is a significant difference between bilateral sagittal split osteotomy with or without genioplasty in the lower facial esthetics values. The combination of mandibular setback and genioplasty had a smaller change in soft tissue thickness of the symphysis area after surgery than that of mandibular setback only.

• Journal of Preventive Medicine and Public Health
• /
• v.26 no.1 s.41
• /
• pp.110-125
• /
• 1993

This study was designed to determine whether non-violent criminal and normal control on the basis of concentration of levels of trace mineral and toxic metal by analysis of human scalp hair. The subjects were selected 87 nonviolent criminal from a prison population and 120 normal control from periodic health checks for study. Hair samples were taken from the napes and Minnesota Multiple Personality Inventory (MMPI) was performed also. Five trace mineral (Zn, Cu, Mg, Fe, Na) and two toxic metal (lead, cadmium) contents were determined by an atomic absorption spectrometer. The contents of zinc and magnesium in hair of non-violent criminal were significantly lower than the control group (p<0.01). In the case of lead and cadimum, mean value of criminal group was significantly higher than control group. Significantly higher T-score of MMPI was seen in non-violent criminal group fur psychopathic deviate (Pd), paranoia scale (Pa), and Mania scale (Ma) than control group, but T-score of depression scale (D) was significantly higher in the control group. In the non-violent criminal group, the content of copper inversely proportion to T-score of Hs, D, Hy, Pd, Mf, Pa, Pt, Sc, Si except Ma, also Zinc inversely proportion to T-score of Hy, Mf, Pa, Pt. These results suggest that difference of some hair mineral contents exist between criminal and normal control group. Thus further studies are necessary to determine whether violent and nonviolent criminal group attributed biochemical imbalance with carefully constructed and controlled studies.