This study is based on the result of oral examination of 'A' airliner employees in the period of June 1997 and December 1997. The purpose of this study is to analyze the distribution of dental diseases among workers and the relationship between income level and dental healthiness. Based on the above analysis, this study further tries to indirectly evaluate the method of prophylaxis. Following is the list of basic findings of this study: Firstly, it was found that male workers tend to have inferior dental condition compared with female workers. Also, dental condition of technicians was found to be worse than that of office workers. Secondly, it was found that dental caries decreased with the age. However, periodontal disease was increasing with the age. Therefore, this result leads us to convince that the education should be focused on 'how to brush your teeth' in order to prevent periodontal diseases. Thirdly, more than 40% of the examined were found to be carrying dental calculus related diseases (67.2%) and cervical abrasion (40.5%), respectively. In conclusion, we became to know that the treatment of cervical abrasion and dental calculus at the Dental Clinic is effective in helping 'A' Airliner employees to have better dental status.
Calculi ; Dental Calculus ; Dental Caries ; Dental Clinics ; Diagnosis, Oral* ; Education ; Female ; Humans ; Male ; Periodontal Diseases ; Stomatognathic Diseases

Rheumatoid patients have poor bone quality and also have an increased incidence of sepsis, delayed wound healing, and general overall complications. It is the purpose of this paper to assess the clinical and roentgenographic results of ABG total hip replacement in rheumatoid arthritis. Twenty-six total hip arthroplasties done in seventeen patients with rheumatoid arthritis were studied prospectively. The average follow-up was 3 years and 4 months, with a minimum follow-up of 2 years and 7 months. The average age of the patients was 49.7 years (range 36-63) and there were sixteen females and one male. All patients fulfilled the 1987 revised criteria and there were eleven cases of protrusio acetabuli. All patients except two were taking oral steroids, nineteen cases were classed as Singhs index 1, five cases as Singhs index 2, and two cases as Singhs index 3. The Charnley approach with a trochanteric osteotomy was employed in all patients. Cup fixation was achieved with two spikes in twenty-one cases, two spikes and one screw in five cases, and in all cases the acetabular cup was angled at less than 45 from the horizontal. There was a gap between the acetabular cup and the acetabulum at DeLee and Charnley zone 1 in three cases, and at zone 2 in six cases. At 2 years, there was no radiolucency, reactive line or any sign of bone resorption. The development of cancellous and cortical densification was seen in Gruen's zone 2 and 6 for the first time in the 1 year radiographs. It became more prominent in the 2 year radiographs. The reactive bone line first became visible at the 6 month follow-up in the Gruen's zone 3 and 5. These lines extended more proximally, but it did not involve the proximal HA coated portion. Cortical hypertrophy of diaphysis was seen at Gruen's zone 3 and 5 in five cases. Rounding off of calcar was visible at zone 7 in six cases. There were no radiological changes of the femoral side in fourteen cases and the acetabular side in seven cases. There was one case of wire breakage, one case of trochanteric separation, and one case of intraoperative splitting of calcar. The result of the study indicated that the development of osseointegration in rheumatoid arthritis might be slow, but the clinical and radiological results were satisfactory. Further prospective follow up is necessary to determine whether the favorable early result of HA coated implant are maintained over longer periods.
Acetabulum ; Arthritis, Rheumatoid* ; Arthroplasty ; Arthroplasty, Replacement, Hip* ; Bone Resorption ; Diaphyses ; Durapatite* ; Female ; Femur ; Follow-Up Studies ; Hip ; Humans ; Hypertrophy ; Incidence ; Male ; Osseointegration ; Osteotomy ; Prospective Studies ; Sepsis ; Steroids ; Wound Healing

PURPOSE: We investigated coagulation disorders in Korean patients of idiopathic avascular necrosis of the femoral head. MATERIALS AND METHODS: Ten laboratory parameters related with coagulation pathway were measured and analyzed in fifty-three patients with idiopathic avascular necrosis of the femoral head and compared the results with those of thirty-one healthy persons. RESULTS: Differences in the values of plasminogen activator inhibitor and D-dimer in the two groups were statistically significant (p<0.05). The number of three or four abnormal parameters in the patient group was nearly twice that of the control. Hypofibrinolytic activity, determined by increased plasminogen activator inhibitor and lipoprotein(a), were observed in eleven cases (20.8%) of the patient group. CONCLUSION: The abnormal results that were observed in the patient group may contribute to the predisposition of thrombotic venous occlusion in the head of the femur, leading to avascular necrosis of the femoral head.
Femur ; Head* ; Humans ; Lipoprotein(a) ; Necrosis* ; Plasminogen Activators

No abstract available.
Dust* ; Humans

PURPOSE: This study conducted a comparative analysis on 49 hips treated with a core decompression procedure and 19 hips treated with a Sugioka's transtrochanteric rotational osteotomy for a osteonecrosis of the femoral head (ONFH). MATERIALS AND METHODS: This study evaluated the relationship between the Ficat and Arlet Stage and the extent of the necrotic lesion (using Shimizu's Grade Classification), and the clinical outcome of each procedure. The patient's outcomes were assessed after a mean follow-up of 46 months (range=36-82 months) after the core decompression and 53 months (range=37-108 months) after the Sugioka's transtrochanteric rotational osteotomy. The results were considered successful if the patients were asymptomatic with no disease progression, and unsuccessful if there was radiographic (progression of the stage or collapse) or clinical failure (the need for an arthroplasty or subsequent salvage operation). RESULTS: Twenty one out of 49 cases (43%) in the core decompression group and 14 out of 19 (74%) in the rotational osteotomy group showed successful outcomes. In the core decompression group, among the 22 F-A Stage I hips, 15 (68%) hips had survived according to radiological criteria. All four (100%) Shimizu's Grade A hips of the F-A Stage I had successful results, which is in contrast to the 11 hips out of 18 hips (61%) of the Shimizu's Grade B and C hips (p<0.01). Six (38%) out of 16 F-A Stage IIA hips and two (25%) out of eight IIB hips in the core decompression group had successful results, while 11 (85%) out of 13 IIA and two (50%) out of four stage IIB hips in the rotational osteotomy group had successful results. In the F-A Stage III hips, all 2 hips in the Sugioka transtrochanteric rotational osteotomy treatment group had survived, while none of the three Shimizu's Grade C hips in the core decompression group were successful. CONCLUSION: A core decompression is effective only in the earliest stages of osteonecrosis (F-A Stage I), which means that its success strongly depends on the location and extent of the femoral head necrosis. Sugioka's transtrochanteric rotational osteotomy is a more dependable procedure than a core decompression for treating large lesions of nonsteroidal ONFH, particularly for patients under the age of 50.
Arthroplasty ; Decompression* ; Disease Progression ; Follow-Up Studies ; Head* ; Hip ; Humans ; Necrosis ; Osteonecrosis* ; Osteotomy*

PURPOSE: The purpose of this study was to evaluate the 15.5 year long term survival rate of the Precoat femoral stem. MATERIALS AND METHODS: We reviewed the results of 105 primary hybrid total hip replacements (98 patients) that were performed by one surgeon between October 1990 and August 1995 using a cemented polymethyl-methacrylate coated femoral prosthesis (Precoat) and contemporary cementing techniques. Thirty four patients (34 hips) died and seventeen patients (17 hips) were lost to follow-up. Forty seven patients (54 hips) were available for clinical follow-up, with an average follow-up period of 15.5 years (range: 8.4 to 18.3 years). The average age of the patients at the time of the index operation was 46 years (range: 22 to 67 years). There were 32 male patients (37 hips) and 15 female patients (17 hips). RESULTS: For the acetabular component, 15 hips (27.8%) were revised for cup loosening and isolated liner exchange was performed in 12 hips (22.2%) for liner wear and osteolysis. For the femoral component, 12 hips (22.2%) were revised due to aseptic loosening. Of these twelve hips, 3 hips had Grade B cement mantles and 9 had Grade C cement mantles. The clinical results of the 54 retained hips were good or excellent in 52 hips (96.3%) with the average Harris hip score being 88 points (range: 72 to 96 points). CONCLUSION: The mean 15.5 years' survival rate of the Precoat cemented femoral stem was 78%. We think that there were several factors for the failure of femoral stem fixation, including age, physical activity and the body weight, as well as the stem design and the surgical technique had an influence on the stem's survival.
Arthroplasty ; Arthroplasty, Replacement, Hip ; Body Weight ; Chimera ; Female ; Follow-Up Studies ; Hip ; Humans ; Lost to Follow-Up ; Male ; Motor Activity ; Osteolysis ; Prostheses and Implants ; Survival Rate

PURPOSE: Surface finishing of a cemented femoral stem is a subject of controversy even though the contemporary cementing techniques have improved results. Using the Versys Heritage femoral stem, we evaluated the outcome of using a polished surface. MATERIALS AND METHODS: The subjects of this study were 95 hip arthroplasties in 82 patients and we used a cemented polished femoral stem with the 3rd generation cement technique and all the surgeries were done between October 2000 and August 2003. There were 58 male patients (64 hips) and 24 female patients (31 hips). The mean age at the time of the index arthroplasty was 52.3 years (26~74 years), and the average body mass index was 24.2+/-2.75 (19.1~29.8). The average follow up period was 80.7 months (64~109 months). All the hips were evaluated clinically by the Harris hip score and the thigh pain, and they were radiologically assessed by the cement grade and the presence of osteolysis around the femoral stem, as well as the presence of stress shielding of the proximal femur. RESULTS: At the final follow up, the Harris hip score for all the patients had improved from preoperative 58.9 (17-83) to post operative 91.7 (72~100). The cement grade was measured using Barrack's method. Of the 95 hips, 45 (47.3%) cases were grade A, 48 (50.5%) cases were grade B and 2 (2.1%) cases were grade C1 at the final follow up. There was 1 case of definite loosening. Stress shielding was noted in 65 (68.4%) cases of the zero grade and 19 (20.0%) cases of the 1st grade. CONCLUSION: In this study, the cemented polished femoral stem showed excellent results at the mid term with a minimum follow up of 5 years. But a longer-term follow-up study will be needed for further understanding the implications of cemented polished femoral stem.
Arthroplasty ; Body Mass Index ; Female ; Follow-Up Studies ; Hip ; Humans ; Male ; Osteolysis ; Thigh

BACKGROUND: Bibliometrics is increasingly used to assess the quantity and quality of scientific research output in many research fields worldwide. This study aims to update Korea's worldwide research productivity in the field of orthopedics using bibliometric methods and to provide Korean surgeons and researchers with insights into such research. METHODS: Articles published in the top 15 orthopedic journals between 2008 and 2017 were retrieved using the Web of Science. The number of articles, citations and h-index (Hirsch index), funding sources, institutions, and journal patterns were analyzed. RESULTS: Of the total 39,494 articles, Korea's contribution accounted for 5.6% (2,161 articles), ranking fifth in the world in the number of publications. Korea ranked sixth (with 29,456) for total citations worldwide but ranked 17th (13.64) in terms of average citation per item and 14th (55) in terms of h-index. Korea showed the most prolific productivity in the field of sports medicine and arthroscopy. The institution that produced the highest number of publications was Seoul National University (n = 386, 17.9%). CONCLUSIONS: Orthopedic research in South Korea demonstrated high productivity in terms of the number of publications in high-quality journals between 2008 and 2017. However, total citations and average citations per article were still relatively low. Efforts should be made to increase citation rates for further improvement in research productivity in the field of orthopedics.
Arthroscopy ; Bibliometrics ; Efficiency ; Financial Management ; Journal Impact Factor ; Korea ; Orthopedics ; Seoul ; Sports Medicine ; Surgeons

BACKGROUND: The authors report the results of femoroacetabular impingement (FAI) treated with a surgical dislocation. METHODS: From April 2005 to May 2007, 15 FAI hips were treated with a surgical dislocation. The male/female ratio, mean age and mean symptom duration was 12/2, 35.8 years and 2.3 years, respectively. Radiographs and MR arthrograms were taken. The clinical evaluation involved changes in the pre- and postoperative Harris hip score (HHS). RESULTS: There were 12 hips (80%) with at least one structural abnormality in the radiographs, with 11 (79%) labral tears and 8 (73%) abnormally high angles in the MR arthrograms. We performed 15 osteochondroplasties, 12 labral repairs, 12 acetabuloplasty, and 3 debridements. The mean HHS improved from 76 to 93 points. Three non-unions of the trochanteric osteotomy sites were encountered as complications. CONCLUSIONS: Radiographs and MR arthrograms are important for making a proper diagnosis of FAI and planning treatment. A surgical dislocation can be used to treat FAI but further technical improvements will be needed for fixation of the greater trochanteric osteotomy sites.
Acetabulum/surgery ; Adult ; Female ; Femoracetabular Impingement/radiography/*surgery ; Femur Head/surgery ; Humans ; Ligaments, Articular/surgery ; Male ; Middle Aged ; Orthopedic Procedures/methods ; Osteotomy ; Treatment Outcome ; Young Adult

PURPOSE: This study was performed to evaluate the clinical outcomes of operative treatment using mini-open sinus tarsi approach for displaced intraarticular calcaneal fractures. MATERIALS AND METHODS: We studied 18 cases (16 patients) of intraarticular calcaneal fractures who were treated with sinus tarsi approach by same surgeon. The mean age of patients was 44.8 years, and mean follow-up period was 17.2 months. The measurement of Bohler angle, Gissane angle, the degree of articular surface depression, and the period to union were performed through preoperative and postoperative radiographs. The clinical evaluation was performed according to hindfoot score of the American Orthopaedic Foot and Ankle Society (AOFAS) and scale of the Creighton-Nebraska health foundation (CNHF). RESULTS: Bohler angle and Gissane angle had improved significantly from preoperative average 9.8degrees, 117.6degrees to average 22.4degrees, 113.4degrees immediate postoperatively, and had maintained to average 21.8degrees and 114.2degrees at the last follow-up. The degree of articular surface depression had improved significantly from preoperative average 5.2 mm to 1.2 mm at the last follow-up. All cases achieved bone union, and the period to union was average 10.5 weeks. AOFAS score was average 86.2 points at the last follow-up. There were 7 excellent, 9 good, and 2 fair results according to the CNHF scale. Therefore, 16 cases (88.8%) achieved satisfactory results. CONCLUSION: The minimally invasive sinus tarsi approach using headless compression screw seems to be an effective surgical method for displaced intraarticular calcaneal fractures, because of the possibility of accurate restoration of articular surface and the low risk of postoperative soft tissue complications.
Animals ; Ankle ; Calcaneus ; Depression ; Follow-Up Studies ; Foot ; Humans ; Intra-Articular Fractures