The aim of this retrospective study was to compare the amount of marginal bone loss between upper anterior area and upper posterior area with 71 upper single-tooth restorations on 2 stage machined Branemark implants since Jan 1995. The second aim was to compare the bone defect group which had dehiscence and fenetration and the others in the upper anterior region. The results were as follows. 1. The most frequent reason of missing tooth in the upper anterior region was trauma by 61%. While upper posterior region showed various reasons such as congenital missing, advanced periodontitis, trauma. 2. Peri-implantitis with fistula occurred 1 of 41 implants in the upper anterior group in 1 year after loading and 2 of 32 implants in the upper posterior group failed before loading. The 1 year success rate of upper anterior group was 97.56 %, and 93.75 % for upper posterior group. 3. The mean marginal bone loss in the upper anterior group was 0.44 +/- 0.25 mm, while 0.57+/- 0.32 mm in the upper posterior group. There was stastically significant difference in the amount of mean marginal bone loss (P<0.05). 4. The mean marginal bone loss of bone defect group was 0.40+/- 0.10 mm at one year, and 0.48+/- 0.26 mm for the control group. No statistically significant difference of mean marginal bone loss was showen between bone defect group and the others at implantation. According to the results, the upper anterior region showed less marginal bone loss than the upper posterior region. In case of missing single upper tooth, careful consideration on recipient residual ridge to determine proper implant diameter and length, sufficient healing time, proper loading would lead to implant success. Single tooth implants in the maxilla seemed to be an alternative to fixed partial dentures without damage to adjacent teeth.

OBJECTIVES: We report on a case-study of a silicosis sufferer with lung cancer, who was exposed to cement dust through plastering and waterproof work in the construction industry. METHODS: We reviewed his personal history including employment, medical record and estimated level of carcinogenic materials in the work place in order to evaluate the possible source of his lung cancer. RESULTS: The patient was a non-smoker and there was no family history of lung cancer. His medical record did not reveal anything of concern. He was exposed to cement dust while he had worked for 20 years as a plasterer and waterproof worker. After complaining of chest pain, he was examined and subsequently diagnosed with lung cancer (RUL, adenocarcinoma; cT4N2M1). He was treated in a hospital for 3 months before passing away. Radiological evaluation by high resolution computed tomography (HRCT) revealed micronodules with a profusion category 1 (p/p, 1/1) in the perilymphatic distribution, which indicated silicosis. Small amounts of cement dust which included silica was identified by environmental evaluation of his work place. He never worked with asbestos related material, which was confirmed by HRCT examination. CONCLUSIONS: We concluded that the patient's silicosis with lung cancer was an occupational-caused disease due to exposure to cement dust.
Asbestos ; Chest Pain ; Dust ; Employment ; Humans ; Hypogonadism ; Lung ; Lung Neoplasms ; Medical Records ; Mitochondrial Diseases ; Ophthalmoplegia ; Silicon Dioxide ; Silicosis ; Stress, Psychological ; Workplace

To determine the early diagnostic parameters of the left ventricular diastolic filling defect in the uncontrolled adult onset diabetes mellitus, 86 diabetics were evaluated from the left ventricular inflow velocity pattern using pulsed Doppler echocardiography compared with normal 21 subjects. The diabetics were divided into 3 groups according to the presence or absence of background diabetic retinopathy(RE or coexisting cardiovascular diseases(group I : 34 cases without RE, group II : 24 cases with RE, group III : 28 cases with CVD). RE was thought to be having microangiopathy, but the cases with persistant massive proteinuria were excluded in this study. The left ventricular inflow velocity patterns were recorded from the apical approach. Peak velocity of the rapid filling phase(PFVE), that in the atrial systole(PFVA), E/A ratio, acceleration time(AT), deceleration time(DT), acceleration rate(ATR) and deceleration rate(DTR) were measured in the left ventricular inflow patterns. The results were ; 1) PFVE, AT and ATR in group I(56.26+/-12.21mm/sec, 70.91+/-14.98msec, 858.5+/-247mm/sec2), group II(51.91+/-14.35mm/sec, 64.84+/-14.98msec, 855.7+/-248.5mm/sec2) and group III(50.07+/-12.45mm/sec, 67.59+/-17.46msec, 817.5+/-266.8mm/sec2) were not significantly changed(p>0.05) compared to the controls(50.24+/-8.24mm/sec, 66.19+/-10.98msec, 784.5+/-221mm/sec2). 2) PFVA and DT in group I(51.21+/-14.86mm/sec, 156.2+/-23.42msec) and group II(64.26+/-13.93mm/sec, 64.84+/-14.13msec) were significantly increased(p<0.05, p<0.0001) compared to the controls(43.43+/-9.1mm/sec, 140.05+/-25.22msec). But those were not significantly different between group II and group III(p>0.05). 3) E/A ratio was significantly decreased in group II(0.82+/-0.21) and III(0.75+/-0.23) compared to the controls(1.19+/-0.25, p<0.0001) or group I(1.16+/-0.41, p<0.0001). But not significantly different between group II and group III(p>0.05) was noted. 4) DTR was also decreased in group II(311.9+/-95mm/sec2, p<0.05) and group III(297.7+/-125.8mm/sec2, p<0.05) compared to the controls(370.2+/-88mm/sec2) and group I(379.8+/-126mm/sec2). In conclusion, left ventricular diastolic filling defect in adult onset diabetics could be determined by using a various parameters of the pulsed Doppler echocardiography, which were closely related with diabetic retinopathy(RE). And DT and PFVA could be used as good parameters for early determination of the left ventricular diastolic filling defect in diabetics even without microangiopathy.
Acceleration ; Adult* ; Deceleration ; Diabetes Mellitus* ; Diabetic Angiopathies ; Echocardiography* ; Echocardiography, Doppler, Pulsed ; Humans ; Proteinuria

The objective of this study was to evaluate the effect a chewable tablet containing sodium flouride and lauroyl sodium sulfate on removing plaque and inhibiting gingival inflammation. A randomized parallel study was designed. 100 voluteers participated in the study. There were two test groups each with 30 subject. Test group A was instructed to brush once in the morning, and to use the tablet once in the afternoon and once in the evening. Test group B was instructed to use the tablet three times a day without brushing. There were two control groups each with 20 subjects. Control group A was instructed to brush once in the morning only. Control group B was instructed not to brush all. Two weeks before the test period, the subjects received through tooth cleaning and polishing. At baseline, GI, PI, BOP, and GCF of the Ramfjord teeth were measured in all groups. Bacteria culture was done with the plaque sampled from tooth with the deepest pocket. After 5 days, clinical indices were measured and the bacterial culture was repeated. Control group B was dropped from the study after this period. All the other groups remained and the indices and the culture was repeated after 2 weeks, and 3weeks. Also whether the oral mucosa showed signs of irritation was monitored throughout the test period. Test group A showed less PI, GI, BOP, probing depth, GCF than test group B or control group A. Especially, PI and the BOP was significantly less than that of the group that was instructed to brush once a day. This implies that the added use of this tablet aids in plaque removal in people who brush just once a day. Test group A showed increase of cocci, decrease of motile rods, and decrease of spirochetes after 14-21 days. And this was significantly different from the control group A. At no time of the test period did any of the subjects show signs of irritation of the oral mucosa or adverse reactions. Following conclusions could be obtained from this study. This chewable tablet for enhanced oral hygiene could be used as an adjunct to oral hygiene in people who do not brush adequately. The use of this tablet decreased the number of subgingival bacteria, and this could be effective in plaque removal and for prevention of gingival inflammation.
Bacteria ; Dental Plaque ; Gingivitis ; Inflammation* ; Mouth Mucosa ; Oral Hygiene ; Periodontitis ; Sodium Fluoride* ; Sodium* ; Spirochaetales ; Tooth

Adenosquamous carcinoma (ASC) of the head and neck is a rare malignancy. This entity was first described in 1968 by Gerughty, et al. Nowadays, ASC is defined in the World Health Organization classification of tumors of the upper respiratory tract and ear as a malignant tumor with histological features of both adenocarcinoma and squamous cell carcinoma. We report a case of adenosquamous carcinoma arising from the base of tongue salvaged by transoral robotic surgery with review of literature.
Adenocarcinoma ; Carcinoma, Adenosquamous* ; Carcinoma, Squamous Cell ; Classification ; Ear ; Head ; Neck ; Respiratory System ; Tongue* ; World Health Organization

Angiofibromas arise from soft tissue, but occur rarely in the nasal cavity. Of these, only six cases have risen from inferior turbinate. Six such cases have been reported previously in English literature and only 1 case in Korea. We present an atypical case of an angiofibroma arising from the inferior turbinate in a 57-year-old woman. The mass was removed with endoscopic approach without massive bleeding.
Angiofibroma ; Female ; Hemorrhage ; Humans ; Korea ; Middle Aged ; Nasal Cavity ; Turbinates

Heart rate (HR) change during sleepy driving has never been investigated. Healthy volunteers who planned to drive a long distance were recruited and monitored with a 24-hour Holter. Six healthy volunteers were enrolled. Their mean driving time was 297.7 ± 111 minutes. Mean duration of sleepy time while driving was 27 ± 24.5 minutes. Driving HR showed a trend for increment as compared to day time mean HR, from 85 ± 5.6 to 89.8 ± 5.6 beats/min (by 7%) (P = 0.093). Mean HR while sleepy driving significantly decreased to 81.5 ± 9.2 beats/min by 9.3% ± 7.4% (P = 0.046). This pilot study for the first time demonstrated that HR decreased while sleepy driving.
Healthy Volunteers ; Heart Rate ; Heart ; Pilot Projects

The ultimate objective of periodontal treatment is to stop disease progression and to regenerate destroyed periodontal tissues and thereby regain normal function. Growth factors are naturally found polypetides which stimulate many cellular activities pertaining to wound healing by acting as signal molecule in controlling cell movement, proliferation, and matrix production. Platelet derived growth factor (PDGF) is 28,000-35,000 Da molecular weight dimeric protein with 2 long positively charged polypeptide chains connected by sulfide bonds. The purpose of this study is to evaluate histologically the initial guided tissue regeneration in a periodontal defect of a beagle dog treated with a biodegradable membrane formed with polylactic acid (poly-L-lactic acid) and polyglycolic acid loaded with 200ng/cm2 platelet derived growth factor. 2 beagle dogs were used in the experiment. 5mmx6mm alveolar bone defect was formed in upper and lower canines and third premolars and a reference notch was placed. PDGF-BB non-containing membrane was used as control. Each defect was randomly assigned to the test group or the control group. The dogs were sacrificed 3 weeks after membrane placement. Toluidine blue and multiple staining was done for histological analysis. In the 3 week specimen in the control group, no new bone formation could be seen. Small amount of bone resorption below the notch could be seen. In the notch, loose connective tissue with infiltration of inflammatory cells could be seen. Also thin discontinuous new cementum could be seen and the membrane still retained its structure. Where PDGF-BB containing membrane was used, new bone formation could be seen in the notch at 3 weeks and also continuous thin cementum could be seen. PDL cells were observed between new bone and new cementum and some were attached to bone and cementum. These results suggest that new bone and cementum formation seen when PDGF-BB loaded membrane was used was due to inhibition of downgrowth of epithelial cells and also due to continuous release of the growth factor. Further study on the resorption characteristics of the membrane and the release characteristics of the PDGF-BB is necessary. Also, development of a membrane easier to use clinically is necessary.
Animals ; Bicuspid ; Bone Resorption ; Cell Movement ; Connective Tissue ; Dental Cementum ; Disease Progression ; Dogs ; Epithelial Cells ; Guided Tissue Regeneration* ; Intercellular Signaling Peptides and Proteins ; Membranes* ; Molecular Weight ; Osteogenesis ; Platelet-Derived Growth Factor ; Polyglycolic Acid ; Tolonium Chloride ; Wound Healing

OBJECTIVE: To investigate the musculoskeletal symptoms of migrant workers. We focused on the relationship between job stress and musculoskeletal symptoms. METHOD: A questionnaire was administered to 502 migrant workers who visited NGO migrant worker centers located in Gyung-gi province. A structured, self-reported questionnaire was administered to participants in order to capture the following information: sociodemographics, health factors including past medical history, work related characteristics, job stress, and musculoskeletal symptoms. The job stress questionnaires were used according to KOSS-26 and musculoskeletal symptoms were measured using KOSHA Code H-30-2003. We used multiple logistic regression analysis to assess the relationship between risk factors which included job stress, and musculoskeletal symptoms. RESULTS: The prevalence rate of musculoskeletal symptoms in survey subjects was 35.1%. Other than job stress factors, past medical history was the only factor that had a statistical relationship to musculoskeletal symptoms (P<0.01). In the domains of job stress, physical environment (OR 1.62, 95% CI: 1.03~2.54), job demand (OR 2.43, 95% CI: 1.46~4.03), job insecurity (OR 1.59, 95% CI: 1.03~2.47), occupational climate (OR 2.30, 95% CI: 1.27~4.19) were most likely experience musculoskeletal symptoms. CONCLUSION: The job stress factor appeared to correlate more with musculoskeletal symptoms than with sociodemographics or other factors. Hence, in order to prevent migrant worker's musculoskeletal symptoms, we believe that intervention in job stress (physical environment, job demand, job insecurity, occupational climate) is necessary.
Climate ; Humans ; Logistic Models ; Prevalence ; Questionnaires ; Risk Factors ; Transients and Migrants

No abstract available.
Animals ; Dogs* ; Ethanol* ; Magnolia* ; Periodontitis* ; Semen*