• Journal of Dental Rehabilitation and Applied Science
• /
• v.39 no.1
• /
• pp.1-8
• /
• 2023

Purpose: The purpose of this study is to analyze the prognostic factors related to tooth loss after 5 years of periodontal surgery in periodontal disease patients. Materials and Methods: From January to December 2017, 22 patients and 124 teeth who underwent periodontal treatment through periodontal surgery were targeted. At the time of treatment, the measured values were evaluated after recording the maximum probing depth, average periodontal probing depth, number of root, furcation involvement, pulp vitality, and prosthesis state on the day of periodontal surgery. Based on the initial records at the time of visit, patient-related factors were gender, age, smoking, tooth loss due to periodontal disease at the time of first visit, diabetes, and maintenance period. The influence of each factor on tooth loss was evaluated. Results: As a result of examining the influence of tooth-related factors on tooth loss, the maximum probing depth depth (P: 0.000), bone loss (P: 0.021) was found to have a significant effect on tooth loss. Conclusion: As a result of examining the influence of patient-related factors on tooth loss, any variables had no significant effect. Bone loss, maximum probing depth acted as statistically significant prognostic factors for tooth loss in patients who underwent periodontal surgery.

• Journal of Chest Surgery
• /
• v.35 no.9
• /
• pp.675-679
• /
• 2002

In patient with severe adhesion between lung and aorta, there is some limitation in approaching the distal arch or descending thoracic aorta through the usual left thoracotomy. We report a case of a successfully managed distal arch and descending thoracic aortic aneurysm through the median sternotomy without any manipulations of the lung in a 66 year old man who presented hemoptysis.

• Journal of the Korean Academy of Esthetic Dentistry
• /
• v.29 no.1
• /
• pp.35-53
• /
• 2020

The treatment of fractured teeth in the upper anterior area has various causes and clinical symptoms at different ages. Most patients come to the clinic in emergency state, so if you're treating them with accurate diagnosis criteria, You'll get aesthetic and functionally satisfying results. I'm going to take a look at the treatment of the upper anterior tooth, which is more sensitive than other parts, with the case I've treated before. The case I treated cannot be the answer, but I hope it will be of any help if youencounter similar symptoms in your clinical trial.

• Journal of Periodontal and Implant Science
• /
• v.37 no.sup2
• /
• pp.353-369
• /
• 2007

Gingival tissue samples were obtained during periodontal surgery or tooth extraction. According to the patient's systemic condition & clinical criteria of gingiva, each gingival sample was divided into three groups. Group 1 (n=8) is clinically healthy gingiva without bleeding and no evidence of bone resorption or periodontal pockets, obtained from systemically healthy 8 patients. Group 2 (n=8) is inflamed gingiva from patients with chronic periodontitis. Group 3 (n=8) is inflamed gingiva from patients with chronic periodontitis associated with type 2 diabetes. Tissue samples were prepared and analyzed by Western blotting. The quantification of $IL-1{\beta}$, MMP-13 and TIMP-1 were performed using a densitometer and statistically analyzed by one-way ANOVA followed by Tukey test. 1. The expressions of MMP-13 and TIMP-1 showed increasing tendency in group 2 & 3 compared to group 1. 2. The expressions of $IL-1{\beta}$ & MMP-13 were showed increasing tendency in group 3 compared to group 2. 3. As $IL-1{\beta}$ levels were increasing, MMP-13 showed increasing tendency in group 3, and although $IL-1{\beta}$ , MMP-13 levels were increasing, TIMP-1 levels were similar expressed comparing to group 2. In conclusion, this study demonstrated that the expression levels of MMP-13 and TIMP-1 had increasing tendency in inflamed tissue. It can be assumed that $IL-1{\beta}$ and MMP-13 may be partly involved in the progression of periodontal inflammation associated to type 2 DM.

• The Journal of Korean Academy of Prosthodontics
• /
• v.52 no.3
• /
• pp.186-194
• /
• 2014

Purpose: Process management is the activity which manages all procedure of construction by representing visually interrelation of operation or sequence setting. The purpose of this study was for reducing treatment period and higher efficiency of treatment through application of PERT/CPM (Program Evaluation & Review Technique/Critical Path Method) in dental clinic. Materials and methods: The patients were selected for study who needed more than 2 departments' cooperation for prosthodontic treatment in Wonkwang Dental University Hospital. Control group is composed of the patient's whole treatment plan, treatment period, numbers of hospital visit, treatment costs, treatment results. On the other hand, experiment group contains the patient's virtual treatment data based on PERT/CPM technique. We applied PERT/CPM in operation analysis. Results: Treatment period, numbers of hospital visit was decreased as 18.1% and 15.3% when we applied operation analysis based on charts. Also treatment cost in experiment group was 0.9% economized compared with control group's treatment cost. Conclusion: Application of PERT/CPM in dental clinic can achieve reliable treatment and reduced treatment period and establish plan of minimum treatment cost.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.39 no.4
• /
• pp.348-356
• /
• 2012

The treatment pattern of pediatric dentistry has been changing recently, because of so many socioeconomic changes such as decrease of birth rates and prevalence of caries. The purpose of this study is to recognize the changing patterns in pediatric dental treatment and to help predict future direction for pediatric dentistry. Patients distribution and treatment pattern were examined in all new patients of the department of pediatric dentistry, Chosun University Dental Hospital and two pediatric local clinics in Gwang-ju, from 2005 to 2010. The number of new patients in recent 5 years has been increasing. There was a higher ratio of male patients. Age distribution has shown the percentage of 3~4 age group was highest. The hospital visit rate to Chosun University Dental Hospital was high, whereas the visit rate for local clinics was low. Dental caries showed the highest percentage in chief complaints, oral examinations have increased. The percentage of restoration treatment was highest, fluoride treatment had increased. In restorative treatment, the percentage of resin and GIC restoration was highest and amalgam restoration has decreased. The percentage of sedation treatment was decreased a little, Chosun University Dental Hospital showed a higher rate than local clinics.

• Journal of Chest Surgery
• /
• v.32 no.3
• /
• pp.270-275
• /
• 1999

Background: In the patients with thoracic injury, we suspect simultaneous cardiac contusion or concussion. We analyzed the patients with possible cardiac injury by electrocardiography, serum creatine kinase (CK), creatine kinase isoenzyme fraction (CK-MB) screening, followed by two dimentional echocardiogram (2-DE) to access the severity of injury. Material and Method: From January 1997 to April 1998, 15-month retrospective study of suspicious myocardial injury was undertaken in including 24 patients admitted for suspected cardiac injury. All patients with history or signs of blunt chest injury were checked serially and the serial CK, CK-MB fraction, electrocardiography (EKG) analysis screening were followed by 2-DE. Result: The age range was between 20-40 years and were predominant male patients in(M:F=3:1). Most common causes of injury were traffic accidents, 15 patients(62.5%). Associated injuries involved multiple rib fractures, sternal fracture and such. EKG findings on the cardiac concussion were within normal limits, EKG findings on the cardiac contusion were nonspecific ST and T wave abnormality. In cardiac contusion patients, CK-MB fraction did not increase significantly on admission but on 2nd, 3rd, 4th hospital days, it increased significantly (p=0.0080, 0.0130, 0.0130). The average admission days were 9.22 in concussion and 26.18 in contusion patients(p=0.0075). Most common complication was the adult respiratory distress syndrome(7 cases), 5 out of the patients with ARDS were mechanically ventilated. There were no deaths. Conclusion: We believe the serial checks of CK-MB, EKG and subsquent two-dementional echocardiographic sector scanning are presently the most sensitive indicators available for structural and functional cardiac injury.

• The Journal of Korean Academy of Prosthodontics
• /
• v.60 no.2
• /
• pp.202-210
• /
• 2022

Recently with the advance in digital dentistry, the fabrication of dentures using computer-aided design and computer-aided manufacturing (CAD-CAM) is on the rise. The denture designed through a CAD software can be produced in a 3-dimensional manufacturing process. This process includes a subtractive processing method such as milling and an additive processing method such as 3D printing and in which it can be applied efficiently in more complex structures. In this case, complete dentures were fabricated using Stereolithography (SLA)-based 3D printing to shorten the production time and interval of visits in patient with physical disabilities due to cerebral infarction. For definitive impression, the existing interim denture was digitally replicated and used as an individual tray. The definitive impression obtained with polyvinyl siloxane impression material was including information about the inclination and length of the maxillary anterior teeth, vertical dimension, and centric relation. In addition, facial scan data with interim denture was obtained so that it can be used as a reference in determination of the occlusal plane and in arrangement of artificial teeth during laboratory work. Artificial teeth were arranged through a CAD program, and a gingival festooning was performed. The definitive dentures were printed by SLA-based 3D printer using a FDA-approved liquid photocurable resin. The denture showed adequate retention, support, and stability, and results were satisfied functionally and aesthetically.

• Journal of Chest Surgery
• /
• v.42 no.2
• /
• pp.226-232
• /
• 2009

Background: Blunt chest trauma accounts for 90% of all chest traumas in Europe and the United States and this causes 20% of all trauma-related deaths. The major cause of morbidity and mortality after blunt chest trauma is undetected injuries. For this reason, chest computerized tomography has gained popularity for the evaluation of trauma, but it is expensive and it exposes patients to radiation. This study identified the clinical features associated with the diagnosic information obtained on a CT chest scan, as compared with a standard chest X-ray, for patients who sustained blunt trauma to the chest. This study also evaluated the role of a routine computed tomographic (CT) scan for these patients. The patients who had chest computed tomography done after the initial chest x-ray were analyzed separately for the presence of occult injuries. Material and Method: We studied 100 consecutive patients from November 2006 to July 2007: 74 patients after motor vehicle crashes and 26 patients after a fall from a height >2m. Simultaneous with the initial clinical evaluation, an anteroposterior chest radiograph and a helical chest CT scan were obtained for all the patients. The data extracted from the medical record included the vital signs, the interventions and the type and severity of injury (RTS). Result: Among the 100 cases, 79 patients showed at least more than one pathologic sign on their chest radiograph, and 21 patients had a normal chest radiograph. For 17 of the patients who had a normal chest X ray, the CT scan showed multiple injuries, which were pneumothorax, hemothorax, lung contusion, sternal fracture etc. This represents that a CT scan is statistically superior to a chest radiograph to diagnose the pathologic signs. But on the other hand, as for treatment, only 31 patients were diagnosed by CT scan and they were treated with chest tube insertion ect. 42 patients needed ony conservative management without invasive thoracosurgical treatment such as chest tube insertion or open thoracotomy. 27 patients were treated based on the diagnosis made by the chest radiograph and physical examination. Conclusion: Chest computerized tomography was significantly more effective than routine chest X-ray for detecting lung contusion, pneumothorax and mediastinal hematoma, as well as fractured ribs, scapula and, sternum. Although the occult findings increased, the number of patients who needed treatment was small. Therefore, we suggest making selective use of a CT scan to avoid its overuse in ERs.

• The Journal of Korean Academy of Prosthodontics
• /
• v.60 no.1
• /
• pp.1-8
• /
• 2022

Purpose. The present study aimed to investigate the effective cleaning of healing abutment (HA) using Healing abutment case (HA case) by observing oral microorganisms with phase contrast microscope. Materials and methods. 32 patients with two or more implants placed in the same jaw, a total of 64 HAs (experimental group 32, control group 32) were selected and the control was cleaned with an alcohol swab. At the first and second visits, each group was observed before cleaning, and the experimental group was additionally observed after cleaning at the first visit. A 400× phase contrast microscope was used for the observation of oral microorganisms for its amounts. Results. There was no significant difference in the amount of oral microorganisms was found between the groups at the first visit, no significant difference according to gender, maxilla or mandible, and buccal or lingual surface. There was a statistically significant difference in the amount of oral microorganisms according to supra-gingival and sub-gingival (P<.05), There was also a significant difference in the comparison before and after cleaning in the experimental group (P<.05). There was a significant difference in the amount of oral microorganisms in each group at second visit (P<.05). Conclusion. Healing abutment cleaning using healing abutment case solution is more effective than simple cleaning with alcohol swab.