• International Journal of Oral Biology
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• 제31권1호
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• pp.7-10
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• 2006

Mitis-salivarius sucrose bacitracin(MSB) medium is widely used in the selective isolation of mutans streptococci(MS), a designation for a group of oral cariogenic species. Recently, we have isolated three bacterial strains grown on MSB agar from human dental plaques. The three strains exhibited biochemical characteristics similar to those of the biotype IV of MS, with the exception that they manifested a positive reaction for arginine deaminase. The objective of this study was to identify and characterize these three clinical isolates. The bacteria were identified with biochemical tests as well as by 16S rDNA cloning and sequencing. In order to compare the antibiotics susceptibility of the clinical isolates with that of type strain, the minimum inhibitory concentrations of 9 antibiotics were determined using broth dilution assays. The results identified all of our three clinical isolates as Enterococcus faecalis. All E. faecalis strains were found to be susceptible to penicillin G, amoxicillin, augmentin, and vancomycin, but were resistant to ciprofloxacin, cefuroxim axetil, and clindamycin. Our findings indicate that E. faecalis is capable of growing on MSB agar, and suggest that the MSB medium be improved so that only MS should be recoverable on the medium, as originally devised for their selection.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권5호
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• pp.265-269
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• 2015

The purpose of this study was to investigate implant-supported restoration as a technique for restoring missing teeth in patients with aplastic anemia. Recurrent bleeding from wound sites leads to persistent release of iron in the tissue. Excessive iron in tissue is related to clinical findings, including fibrosis, poor wound healing, and high level of angiogenesis, which are possible etiological factors of reduced osseointegration. A 44-year-old female patient with aplastic anemia was treated with multiple endosseous implants throughout the mandible and in the posterior region of the maxilla. After 14 implants were placed, radiological and clinical parameters were assessed during the follow-up period. Marginal bone did not change significantly during the follow-up period. The fine trabecular bone in intimate contact and enclosing the implant fixture was sufficient for successful osseointegration. None of the 14 implants were associated with compilations during the seven-year experimental period. This study suggests that dental implant procedures are a safe and reliable treatment option for restoration of missing dentition in patients with aplastic anemia.

• 대한치과마취과학회지
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• 제10권1호
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• pp.1-6
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• 2010

Background: Articaine, commercially available in South Korea from 2004, is widely being used for dental treatments. In the surgical extraction of impacted mandibular third molars, one of the most common procedures in oral and maxillofacial surgery, the anesthetic efficacy of 4% articaine and 2% lidocaine, both with 1：100,000 epinephrine, was compared. Methods: A randomized double-blind clinical trial was conducted of 80 patients for bilateral surgical extraction of mandibular third molars with informed consents. One operator carried out the routine surgical procedures using local anesthetic 4% articaine or 2% lidocaine with the same concentration of vasoconstrictor. Latency, duration of anesthesia and the amount of anesthetic solution were recorded. A visual analog scale (VAS) was used to evaluate the intraoperative pain. Results: The pain VAS scores reported similar anesthetic effect with both local anesthetics. Not in the latency of anesthesia and the amount of anesthetic solution, statistically significant difference was found in the mean duration of anesthesia. Conclusions: It was concluded that 4% articaine could offer better or at least the same clinical feasibility compared to 2% lidocaine, particularly in terms of the duration of the local anesthesia for common dental treatments.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제16권3호
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• pp.508-514
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• 1994

For the complete cure of oral cancer suspected to have invaded the mandible in clinical & radiological evaluation, the mandible resection in planned. The aim of this clinical study was to help in decision making in the method & the extent of the mandibular resection surgery. This study was conducted on 46 oral cancer patients, who received cancer surgery including mandibulectomy. And we evaluated the relationship between the pathologic results of resected mandible and the location, size and clinical newk node involvement, tumor cell differentiation. The results are that ; (1) Hiher incidence of bone invasion patterns were observed in tumor of mouth floor & gingiva compared to those of tongue & tonsil, and (2) No significant relationship was found between bone invasion of tumor and tumor size, neck node involvement tumor cell differentiation. The approximation between tumor and bone seems to be the most reliable factor among the other factors in decision making of mandibular resection.

• Imaging Science in Dentistry
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• 제34권2호
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• pp.91-97
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• 2004

Purpose : This study was performed to evaluate the diagnostic value of both planar and SPECT imagings by comparing the results with the clinical and other imaging modalities findings. Materials and Methods: A total of 578 joints with TMJ complaints were examined using planar scintigraphy and SPECT. The planar scintigraphy and SPECT findings were analyzed and compared to the clinical findings of pain, clicking, crepitus and limitation of mouth opening. Moreover we compared the accuracy of the planar scintigraphy and SPECT methods with the one of the panoramic, transcranial, tomographic and MR imaging methods. Results: The planar scintigraphy and SPECT methods showed a high sensitivity of 0.76-0.84 and low specificity of 0.25-0.45 toward the clinical findings: pain, clicking, crepitus and mouth opening restriction. Simple radionuclide uptake ratio was high in each group of patients with pain, crepitus, limitation of mouth opening (p < 0.05) complaints, in each group with positive bone changes on panoramic, transcranial or tomographic images, and in disc displaced group. Conclusion: Although both planar and SPECT imagings have limited specificity, these techniques are sensitive for detection of internal derangement of the TMJ.

• Restorative Dentistry and Endodontics
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• 제14권1호
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• pp.85-96
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• 1989

In the Infected root canals, the majority of the isolated bacteria are either strict anaerobes or microaerophilic organisms. Among thease, Black-pigmented Bacteroides species are the most important and have relation with clinical symptoms. The purpose of this study were to investigate on the 7 different types of bacteria which include Black-pigmented Bacteroides - Black--pigmented Bacteroides, Actinobacillus actinomycetemcomitans, Streptococcus, Capnocytophaga, Eiknella corrodens, Fusobacterium, Actinomyces - and the interrelationship between these 7 bacterical species, and to compare Black-pigmented Bacteroides with the clinical symptoms in infected root canals. The canal contents of 15 necrotized teeth with 8 clinical symptoms were sampled and cultured aerobically and anaerobically for growth in 7 selective agar plates for 7 bacterial species. Black-pigmented Bacteroides and Streptococcus subspecies were identified by biochemical tests. The results were as follows; 1. 70.51% of the bacteria isolated were anaerobes and 29.49% were aerobes. 2. B. loescheii, B. intermedius, B. denticola were isolated in 8 cases, Streptococcus was isolated in 8 cases, Fusobacterium was isolated in 6 cases, Actinomyces was isolated in 5 cases and Eiknella corrodens, Actinobacillus actinomycetemcomitans, Capnocytophaga were not isolated. 3. There were mutual inhibition of growth between Black-pigmented Bacteroides and Streptococcus. (P<0.01) But Actinomyces and Fusobacterium showed mutual aids for growth. (P<0.05) 4. Black-Pigmented Bacteroides was found to be related both to sinus tract formation and to apical sensitivity to palpation.(P < 0.05).

• 대한치과마취과학회지
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• 제4권1호
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• pp.17-20
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• 2004

Chronic periodontitis is one of the most common disease in clinical dentistry, which needs various surgical interventions to treat the moderate to severe destruction of supporting periodontium. Most patients have fear and anxiety to these surgical procedures and some dentists also have problems to deal with these patients. Applying the conscious sedation technique in outpatient units, periodontists have become to manage their patients successfully without any fear and anxiety and increased the level of patients' satisfaction. Particularly, periodontal treatments require relative long chair-time and patients are usually reluctant to the periodontal instruments used in the oral cavity. This study is focused on the sedation procedure with intravenous midazolam infusioon performed in Department of Periodontology, Ewha Womans University Hospital. The whole procedure of intravenous midazolam sedation is briefly reviewed from patient selection to patient discharge.

• Imaging Science in Dentistry
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• 제33권2호
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• pp.107-112
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• 2003

Purpose : To determine the relationship between clinical symptoms and magnetic resoncance (MR) images in patients presenting with temoporomandibular joint (TMJ) disorders. Materials and Methods: This study was based on 172 joints in 86 patients presenting with TMJ disorders. Joint pain and sound during jaw opening and closing movements were recorded, and the possible relationship between disc positions and bony changes of the condylar head and the articular fossa in MR images in the oblique sagittal planes were examined. Data were analyzed by Chi-square test. Results : There was no statistically significant relationship between clinical symptoms and MR images in the patients with TMJ disorders. Conclusion: In the patient with TMJ disorders, joint pain and sound could not be specific clinical symptoms that are related with MR image findings, and asymptomatic joints did not necessarily imply that the joints are normal according to MR image findings.

• Journal of Periodontal and Implant Science
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• 제40권5호
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• pp.249-253
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• 2010

Purpose: The purpose of this study was to evaluate the improvement of periodontal health of generalized aggressive periodontitis (GAgP) diagnosed patients treated with non-surgical periodontal therapy accompanying systemic antibiotics administration. Methods: Two patients with GAgP were chosen for this study. Clinical indices were taken and a radiographic examination was performed at the baseline of the study and they were treated by periodontal therapy accompanying systemic antibiotics administration. Post-surgical visits were scheduled at regular intervals to check clinical and radiographic changes. Results: Through non-surgical periodontal therapy accompanying systemic antibiotics administration, GAgP patients showed decreased probing pocket depth, sulcus bleeding index, and increased attachment level and clinical index when comparing the initial and six month follow up data. In the six month follow-up radiographic examination after non-surgical periodontal therapy, resolution of the bony defect was observed. Conclusions: Non-surgical therapy combined with systemic antibiotics administration in GAgP patients is suggested to be an effective approach to enhance the periodontal health.

• Journal of Dental Anesthesia and Pain Medicine
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• 제23권2호
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• pp.59-67
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• 2023

General anesthesia may influence the postoperative sleep cycle; however, no clinical studies have fully evaluated whether anesthesia causes sleep disturbances during the postoperative period. In this scoping review, we explored the changes in postoperative sleep cycles during surgical procedures or dental treatment under general anesthesia. We compared and evaluated the influence of general anesthesia on sleep cycles and sleep disturbances during the postoperative period in adult and pediatric patients undergoing surgery and/or dental treatment. Literature was retrieved by searching eight public databases. Randomized clinical trials, observational studies, observational case-control studies, and cohort studies were included. Primary outcomes included the incidence of sleep, circadian cycle alterations, and/or sleep disturbances. The search strategy yielded six studies after duplicates were removed. Finally, six clinical trials with 1,044 patients were included. In conclusion, general anesthesia may cause sleep disturbances based on alterations in sleep or the circadian cycle in the postoperative period in patients scheduled for elective surgery.