Journal of Yeungnam Medical Science

Jae Chul Song

6 Articles

Clinical Evaluation about the Immediate Implant Replacement after Tooth Extraction.: Eun Young Yang, Sang Deuk Chun, Jae Hwan Rho, Seung Eun Lee, Jae Chul Song, Byung Rho Chin; Yeungnam Univ J Med. 2003;20(1):45-52. Published online June 30, 2003; DOI: https://doi.org/10.12701/yujm.2003.20.1.45

1,532 View
1 Download

Abstract PDF: BACKGROUND
Immediate implant placement has become an acceptable treatment for the edentulous area. The advantages of the immediate implant placement include considerable decrease in time from tooth extraction to placement of the finial prosthesis, fewer surgical procedures, and better acceptance of the overall treatment plans. But the success is dependent on the quantity and quality of the extraction socket. The purpose of this study is to evaluate the success of the immediate implant placement. MATERIALS AND METHODS: Twenty-one sites in 16 patients were selected for the evaluation of the immediate implant placement. All of the cases were followed using clinical and radiographic examinations. Criteria of success were the absence of peri-implant radiolucency, mobility, and persistent pain or sign of infection. RESULTS: Of the 21 implants, 13 implants have been succeeded. Of the 13 implants, 10 implants were replaced for the periodontal disease and 3 implants were replaced for the trauma. CONCLUSION: The criteria of the success in immediate implant placement are as follows. 1) Implants placed into fresh extraction sockets have a high rate of survival. 2) Implant should be placed as close as possible to the alveolar crest. 3) Implant placed into available bone beyond the apex have a high success rate.

Non-Surgical Treatment of Mandibular Condylar Fracture with Functional Appliance: Clinical and Radiographic Analysis of 1 Case.: Sang Deuk Chun, Jae Hwan Rho, Jae Chul Song, Byung Rho Chin; Yeungnam Univ J Med. 2002;19(2):144-150. Published online December 31, 2002; DOI: https://doi.org/10.12701/yujm.2002.19.2.144

1,415 View
9 Download

Abstract PDF: Mandibular condylar fracture is common in mandibular fractures. Unlike other facial, skeletal fractures, most of mandibular condylar neck or head fractures are treated with closed reduction and subsequent functional therapy is essential for preventing complications including ankylosis, arthrosis and growth disturbance. From January, 2000 to September, 2002, we have treated 15 cases of mandibular condylar fractures with closed reduction by using functional appliance with bite block. Among these cases, we report a case of 14-year-old female with mandibular condylar neck fracture, resulted in good clinical and radiographic progress.

A Lateral Cephalometric Study of Maxillofacial Morphologic Features in Class III Malocclusion Children.: Woo Ill Sohn, Ic Jun Chang, Jae Chul Song, Byung Rho Chin; Yeungnam Univ J Med. 2001;18(2):208-214. Published online December 31, 2001; DOI: https://doi.org/10.12701/yujm.2001.18.2.208

1,599 View
10 Download

Abstract PDF: BACKGROUND
When we make treatment plan of class III malocclusion children, it is difficult to determine whether we treat it with orthognathic surgery or without orthognathic surgery. To determine that, we must consider many factors, such as cephalometric analysis, growth pattern, family history, and skeletal age. A Harvold cephalometric analysis is useful in determining the amount of discrepancy by comparing the maxillary unit length with mandibular unit length. We tried this study to help the decision of treatment planning in class III malocclusion children by comparison in class III malocclusion and normal occlusion children using a Harvold analysis. MATERIALS AND METHODS: The materials for this study consisted of 20 class III malocclusion children. Cephalometric tracing and measurements were performed by one investigator. The control group consisted of 18 normal occlusion children and lateral cephalograms were obtained from 8.5 to 14.5 years old children biannually. The relationships between class III malocclusion group and normal occlusion group were evaluated statistically. RESULTS: The lower anterior facial heights between two groups were not significantly different, although the lower anterior facial heights of class III malocclusion group was higher than those of normal occlusion group in all age groups. The Maxillary-mandibular unit length differences of class III malocclusion group were significantly higher than those of normal occlusion group(p < 0.05). CONCLUSION: A Harvold analysis was useful to make treatment planning for class III malocclusion children.

Comparative Analysis of Accuracy between Computerized Tomography and Cephalogram for 3-Dimensional Measurement of Maxillofacial Structure.: Jong Su Paek, Jae Chul Song, Hee Kyung Lee; Yeungnam Univ J Med. 2001;18(1):123-137. Published online June 30, 2001; DOI: https://doi.org/10.12701/yujm.2001.18.1.123

1,405 View
1 Download

Abstract PDF: BACKGROUND
The purpose of this study is to evaluate the accuracy of measurements obtained from 3-dimensional computerized tomography and 3-dimensional cephalogram constructed by using the frontal and lateral cephalogram of six human dry skulls. MATERIALS AND METHODS: After CT scans and each cephalograms were taken, 3-dimensional coordinates (X, Y, Z) of landmarks were obtained using computer programs. In this study, the accuracy of both methods were determined by means of 14 linear measurements compare with caliper measurements. RESULTS: The standard deviation of landmarks of 3-dimensional CT and 3-dimensional cephalogram were 0.23 mm and 0.30 mm in X axis, 0.27 mm and 0.25 mm in Y axis, and 0.27 mm and 0.31 mm in Z axis. In both methods, the standard deviation were less than 0.5 mm in all landmarks, and the most of landmarks showed less than 1 mm in range. Concerning the accuracy, the mean difference between 3-dimensional CT and manual measurements was 0.33 mm, and 1.13 mm between 3-dimensional cephalogram and manual measurement. The distance between RGo and LGo showed the largest difference (2.23 mm). There were highly significant, and large correlation with manual measurements in both methods (p<0.01). CONCLUSION: It is concluded that closeness of repeated measurements to each skulls reveal the precision of both methods. Computerized tomography and cephalogram for 3-dimensional measurement of maxillofacial structure are equivalent in quality to caliper measurements.

A Cephalometric Study of Lateral Morphologic Features in Adult Cleft Lip and Palate Patients.: Ic Jun Chang, Woo Ill Sohn, Jae Chul Song, Byung Rho Chin; Yeungnam Univ J Med. 2001;18(1):112-122. Published online June 30, 2001; DOI: https://doi.org/10.12701/yujm.2001.18.1.112

1,463 View
2 Download

Abstract PDF: BACKGROUND
Cleft lip and palate deformity have unknown patterns of maxillofacial growth and development. The maxillofacial growth can be affected either by congenital or environmental factors such as infection and trauma. Surgical repair of cleft lip and palate may interfere the subsequent growth and development of maxillofacial region. The purpose of this study is to evaluate the characteristics of maxillofacial growth patterns in adult cleft lip and palate patients. MATERIALS AND METHODS: The material for this study consisted of 17 adult male patients with cleft lip and palate. Cephalometric tracing and measurements were done by one investigator. The relationship between 17 cleft lip and palate patients and Korean norms were evaluated statistically. RESULTS: There were statistically difference in Na, perpendicular to point A, SNA angle, effective maxillary length, maxillofacial differencial, Wit's appraisal and upper incisor to point A (p < 0.01). Pogonion to Na. perpendicular also statistically differed (p < 0.05). Other measurements didn't statistically differ. CONCLUSION: It was evident that in adult cleft lip and palate patients, maxilla was retruded and short. Careful cleft lip and palate repair and treatment are recommended for facilitating normal growth of maxilla.

Clinical Features of the Temporomandibular Disorder Patients with Occlusal Splint Therapy.: Jae Chul Song, Byung Rho Chin; Yeungnam Univ J Med. 1998;15(2):316-324. Published online December 31, 1998; DOI: https://doi.org/10.12701/yujm.1998.15.2.316

1,533 View
4 Download

Abstract PDF: This study was performed to evaluate the clinical features and treatment results on 55 temporomandibular disorder patients who had treated by conservative treatment using occlusal splint. The results were as follows; 1. The ratio of men to women was about 1:2.2 and most of the patients were second and third decades. 2. Pain was the most frequent symptom, followed by clicking and mouth opening limitation. 3. The number of acute and chronic groups on the basis of 6 months duration of symptoms were similar. 4. Most of patients had Angle's Class 1 molar relationships(78.2%), followed by Class 3 and Class 2. 5. Centric Relation splints were used alone for treatment of 34 patients and 21 patients were treated with Centric Relation splints and Anterior Repositioning splints. The treatment duration of the patients who had complained pain was average 9.8 weeks and 6 patients of them had slight pain continuously during follow-up. 6. Eleven patient's maximum mouth opening who had mouth opening limitation was improved from 30.7mm to 43.0mm during procedures.

Author index