ABSTRACT
OBJECTIVES: To investigate the relationship between job stress and the variables associated with the organizational effectiveness of dental technicians. METHODS: The job stresses were divided into the following six components; somatization, obsessive-compulsive, interpersonal sensitivity, depression, anxiety, and hostility. The organi-zational effectiveness variables in this study included job satisfaction, occupational commitment, organizational commitment and intent to leave. The sample used in this study consisted of 248 dental technicians working in hospitals and dental laboratories. The data were collected with self-administered questionnaires between March 16 and April 29 in 2002, and the results analyzed with ANOVA and multiple regression analysis. RESULTS: Firstly, job stress of dental technicians was found to be significantly different in relation to the number of workers at the workplace and the working hours. The level of job stress was the highest when the number of workers were more than 10, or when the daily working hours were over 12. Secondly, of the six variables of job stress, five variables of somatization, interpersonal sensitivity, depression, anxiety, and hostility were found to have significant negative correlations with job satisfaction. Thirdly, all six job stress variables were found to have significant negative correlations with the occupational and organizational commitments of the dental technicians. Finally, depression was the only job stress variable found to have a significant effect on the dental technicians' intent to leave. CONCLUSIONS: The results of this study indicate that personal and organizational efforts are very important to improve the organizational effectiveness in reducing work related stress. Organizational support, especially for managing the depression of dental technicians is recommended.
Subject(s)
Humans , Anxiety , Dental Technicians , Depression , Hostility , Job Satisfaction , Laboratories, Dental , Surveys and QuestionnairesABSTRACT
PURPOSE: The control of tuberculosis is seriously threatened worldwide by the recently emerging multidrug-resistant Mycobacterium tuberculosis. As a result, early detection of drug resistant M.tuberculosis strain has become very important but conventional laboratory methods are time consuming and delayed results often affect patients adversely in controlling tuberculosis. The authors studied the usefulness of the line probe assay to determine the mutaion in rpoB gene of rifampin resistant M.tuberculosis and to find out if this method can substitute conventional methods in the detection of resistant strain. METHODS: This study employed 40 clinical samples of M.tuberculosis which had been determined by culture and drug sensitivity test. After amplification of rpoB-the gene for the B subunit of the RNA polymerase-by PCR, the amplified products were hybridized with specific oligonucleotide probes immobilized on nitrocellulose strip and direct DNA sequencing was also performed. The results were compared with those of the classical susceptibility test. RESULTS: Among the 40 samples, 10 were identified as drug resistant strain by classical drug susceptibility test. Three of the ten resistant samples were rifampin resistant strains, which were identified by either method. All mutations were clustered within the region of 69bp of rpoB and all were single nucleotide mutations. Two isolates had a TCG->TTG(serine->leucine) mutation in codon 522. One isolate had a CAC->CTC(histidine->leucine) mutation in codon 526. CONCLUSION: In contrast to culture and sensitivity tests, line probe assay is an easy and speedy method for detecting rifampin resistant M.tuberculosis in clinical samples as well as a helpful tool for choosing antituberculosis drug in children.
Subject(s)
Child , Humans , Codon , Collodion , DNA-Directed RNA Polymerases , Early Diagnosis , Mycobacterium tuberculosis , Mycobacterium , Oligonucleotide Probes , Polymerase Chain Reaction , Rifampin , RNA Polymerase II , RNA , Sequence Analysis, DNA , TuberculosisABSTRACT
The purpose of this study was to evaluate the human pulpal response to Dentin Bonding Desensitizer. Class v cavities were prepared on the buccal surfaces of the first premolars and Dentin Bonding Desensitizer(ALL-BOND Desensitizer, Bisco, Inc. U.S.A.) was applicated in ten experimental teeth, or ZOE(PROPAC, GC Co. TOKYO, JAPAN) cement in eight control teeth and cavities were filled with light curing glass ionomer(Fuji II LC, GC Co., TOKYO, JAPAN). At 3-day and 25-day postoperative interval, pulpal response was observed and evaluated histologically with light microscope. The results were as follows. : 1. At 3-day postoperative interval, the control teeth were grade 1 inflammatory cell response and grade 1 connective tissue response. 2. At 25-day postoperative interval, all control teeth were grade 1 inflammatory cell response and in three control teeth grade 1 connective tissue response were observed, and one teeth showed grade 2 connective tissue response. 3. At 3-day postoperative interval, the experimental teeth were grade 1 inflammatory cell response and grade 1 connective tissue response. Below the cavity a few inflammatory cell(PMNs) in odontoblastic layer, increased blood vessels and pulpal cells were seen and this pulpal response was similar to control teeth. 4. At 25-day postoperative interval, in four experimental teeth grade 1 inflammatory cell response and grade 1 connective tissue response were observed, and one experimental teeth showed mild inflammatory response. 5. At 3-day and 25-day postoperative interval, no reparative dentin deposition was seen. 6. Both experimental and control group, pulpal response showed difference between 3 and 25-day of postoperative interval. In control teeth, increased predentin and pulpal cells were seen and in experimental teeth, congestion of blood vessels and increased pulpal cells were seen. In conclusion, the pulpal irritation due to this Dentin Bonding Desensitizer was not severe, and it was considered that agent was not harmful to the human pulp.
Subject(s)
Humans , Bicuspid , Blood Vessels , Connective Tissue , Dentin , Estrogens, Conjugated (USP) , Glass , Odontoblasts , ToothABSTRACT
The purpose of this study was to investigate the influence of balancing interference on the mandibular movement and masticatory muscle activity. 5 subjects(male, average age of 24.3) without dysfuction in masticatory system were selected. The balancing interference was provided by construction of cast metal crown and onlay on the upper and lower first molars. Clinical examination, changes mandibular displacement and velocity, and muscle activity were recorded and analyzed by means of BioPak system(Bioresearch Inc., Milwaukee Wisconsin, USA). The results were as follows: 1. In clinical examination, various symptoms were reported by all subjects after application of interference. Almost symptoms were subsided after elimination of interference. 2. In the border movements in frontal plane, lateral border movement toward non-interference side was changed according to the interference after application of interference. Immediately after removal of interference, border movements pattern was recovered as same as before experiment. 3. During gum chewing on the non-interference side, horizontal movement was decreased immediately after application of interference(p0.05). 5. During gum chewing on the interference side, the activity of opposite temporal muscle was increased immediately after application of interference(<0.05). 1 week after application interference, The activity of ipsilateral temporal muscle and left and right masseter muscle was increased (p<0.05). 1 week after elimination of interference, increased muscle activity was recovered about the same level as before experiment. 6. During gum chewing on the non-interference side, 1 week after application of interference, the activity of ipsilateral temporal muscle was increased (p<0.05). 1 week after elimination of interference, increased muscle activity was returned about the same level as before experiment.
Subject(s)
Crowns , Gingiva , Inlays , Masseter Muscle , Mastication , Masticatory Muscles , Molar , Stomatognathic System , Stroke , Temporal Muscle , Vertical Dimension , WisconsinABSTRACT
We experienced a case of 2q+ syndrome in a neonate who had multiple congenital anomalies of long philtrum, a bow-shaped mouth, long fingers, and its second and fifth fingers overlapped with the third and the fourth. In the cytogenetic studies using G banding technique, an extra band of the distal long arm of chromosome 2 was shown. Because its extra chromosomal segment was too small and the parents' chromosome were normal, it was difficult to determine the origin of the additional segment. We could find the fluorescent signal from the extra chromosomal segment by using painting probe of chromosome 2. The karyotype of the patient was confirmed as 46, XX, 2q+. We reported the case with the review of the associated literatures.
Subject(s)
Humans , Infant, Newborn , Arm , Chromosomes, Human, Pair 2 , Cytogenetics , Fingers , In Situ Hybridization, Fluorescence , Karyotype , Lip , Mouth , Paint , PaintingsABSTRACT
We experienced a case of 2q+ syndrome in a neonate who had multiple congenital anomalies of long philtrum, a bow-shaped mouth, long fingers, and its second and fifth fingers overlapped with the third and the fourth. In the cytogenetic studies using G banding technique, an extra band of the distal long arm of chromosome 2 was shown. Because its extra chromosomal segment was too small and the parents' chromosome were normal, it was difficult to determine the origin of the additional segment. We could find the fluorescent signal from the extra chromosomal segment by using painting probe of chromosome 2. The karyotype of the patient was confirmed as 46, XX, 2q+. We reported the case with the review of the associated literatures.
Subject(s)
Humans , Infant, Newborn , Arm , Chromosomes, Human, Pair 2 , Cytogenetics , Fingers , In Situ Hybridization, Fluorescence , Karyotype , Lip , Mouth , Paint , PaintingsABSTRACT
The purpose of this study was to compare and evaluate the differences in masticatory performance, muscle activity, and patterns of occlusal contact between persons with natural dentition and removable partial denture wearers. Twenty healthy adult subjects with more than 28 teeth and thirteen removable partial denture wearers that classified Kennedy classification I was selected. The degree of pulverized rice and peanut was measured and analyzed by means of sieving method to compare the masticatory performance. For the muscle activity, EMG was recorded in selected muscles(Temporalis and masseter muscle)during mastication and resting state. The occlusal record in maximal intercuspation was taken with a silicone occlusal bite registration material for analysis of the patterns of occlusal contact. The obtained results were as follows: When chewed peanuts, masticatory performance ratio at 10-sieve size was 81.31% in natural dentition group. In removable partial denture wearer, 27.01% without RPD and 69.09% with RPD. When chewed rice, 42.04%, 11.87%, and 21.58%, respectively. The differences of masticatory performance ratio between groups were statistically significant at the 0.05 level. The mean EMG value in resting state was 1.06mV on temporal muscle, 0.98mV on masseter muscle in natural dentition group. In removable partial denture wearers, 1.13mV on temporal muscle, 1.05mV on masseter muscle without RPD and 1.11mV on temporal muscle, 1.04mV on masseter muscle with RPD. The mean EMG value during mastication was 45.64mV in natural dentition group, and in removable partial denture wearers, 22.06mV without RPD and 31.01mV with RPD when chewed peanuts. When chewed rice, 45.24mV, 25.53mV and 32.14mV, respectively. The differences of mean masticatory EMG value between groups were statistically significant at the 0.05 level. The number of posterior occlusal contact point was 20.15 in natural dentition group and 11.92 in removable partial denture wearers. The area of perforated surface was 16.50mm2in natural dentition group and 6.06mm2in removable partial denture wearers. The area of contact surface was 78.93mm2, 51.52mm2, respectively. The area of contact surface was effective to masticatory performance ratio in natural dentition group and removable partial denture wearers (P<0.05) From these results, it is concluded that in partially edentulous patient, masticatory efficiency can be improved by removable partial denture wearing, and for effcient mastication, tigth occtact surface shoud be maintained by maximum support that is provided from mucosa.
Subject(s)
Adult , Humans , Arachis , Classification , Dentition , Denture, Partial, Removable , Jaw Relation Record , Masseter Muscle , Mastication , Mucous Membrane , Silicones , Temporal Muscle , ToothABSTRACT
Symptomatic primary heart tumors are rare in newborn. Cardiac rhabdomyoma is the most common lesion of the primary heart tumors and over half of them are related to kthe tuberous s clerosis. We described a case of cardiac rhabdomyoma, in a 2 day-old female newborn who presented with dyspnea and cyanosis. A 2D Echocardiogram demonstrated two masses; one is in the rt. ventricle and another is in the interventricular septum. Additional cardiac masses and cerebral tubers and subependymal giant cell astrocytoma were found at autopsy.
Subject(s)
Female , Humans , Infant, Newborn , Astrocytoma , Autopsy , Cyanosis , Dyspnea , Heart Neoplasms , Rhabdomyoma , Tuberous SclerosisABSTRACT
The unilateral megalencephaly is a rare brain malformation characterized by cerebral asymmetry and cortical dysplasia caused by faulty migration of the subependymal neuroblasts. We experienced a case of unilateral megalencephaly in a two day-old male with the chief complaint of asymmetric head appearance. Large left hemisphere with agyria, pachygyria, dilatation of lateral ventricle, and the thick cortex of the ipsilateral hemisphere were showed in brain MRL, Clinical findings in this case were intractable seizure, hemiparesis, and psychomotor retardation. A review of literatures was also presented briefly.
Subject(s)
Humans , Male , Brain , Dilatation , Head , Lateral Ventricles , Lissencephaly , Malformations of Cortical Development , Paresis , SeizuresABSTRACT
No abstract available.
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No abstract available.
Subject(s)
Finite Element Analysis , Prostheses and Implants , ToothABSTRACT
No abstract available.
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No abstract available.
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No abstract available.