Background: Carbapenem-resistant Acinetobacter baumannii (CRAB) represents a devastating and growing global threat, calling for new antibiotic treatments. In Korea, the challenge of treating CRAB is compounded by high nosocomial acquisition rates and limited availability of novel antibiotics. Minocycline, a semisynthetic tetracycline derivative, has been proposed as a therapeutic option for CRAB infections. Nonsusceptibility to minocycline may occur through the efflux pump, TetB. The prevalence of tetB in A. baumannii has increased, along with higher minocycline minimum inhibitory concentrations (MICs). We aimed to evaluate minocycline susceptibility rates in clinical strains of CRAB, and the association between tetB carriage and minocycline susceptibility across different genotypes. Materials and Methods: Representative CRAB blood isolates were collected from Asan Medical Center, Seoul.Minocycline susceptibility was assessed using the Clinical and Laboratory Standards Institute (CLSI) breakpoint (≤4 mg/L) and the proposed pharmacokinetics (PK)/pharmacodynamics (PD) breakpoint (≤1 mg/L). Tigecycline was used as a comparator, and its susceptibility breakpoint for Enterobacterales defined by EUCAST was applied (≤0.5 mg/L).The presence of tetB was detected by PCR, and multilocus sequence typing (MLST) was performed using seven housekeeping genes. Results: Of the 160 CRAB blood isolates, 83.8% were susceptible to minocycline by the CLSI criteria, and 50.6% were PK-PD susceptible by the PK-PD criteria. The minocycline minimum inhibitory concentration (MIC)50 /MIC90 was 1/8 mg/L. tetB was present in 49% of isolates and was associated with a higher minocycline MIC (MIC50/90 2/8 mg/L vs. 1/2 mg/L). No clear correlation was observed between tetB positivity and tigecycline MIC. Nine MLSTs were identified, with significant differences in tetB carriage rates between the major sequence types. Notably, ST191, associated with non-tetB carriage and greater susceptibility to minocycline, declined over the study period (P=0.004), while ST451, associated with tetB carriage, increased. Conclusion tetB was present in 49% of CRAB isolates and was associated with higher MICs and non-susceptibility by both CLSI and PK-PD criteria. However, absence of tetB was not a reliable predictor of minocycline PK-PD susceptibility. Additionally, shifts over time towards genotypes with reduced minocycline susceptibility were observed. Further research is needed to correlate these findings with clinical outcomes and identify additional resistance mechanisms.

Background: Carbapenem-resistant Acinetobacter baumannii (CRAB) represents a devastating and growing global threat, calling for new antibiotic treatments. In Korea, the challenge of treating CRAB is compounded by high nosocomial acquisition rates and limited availability of novel antibiotics. Minocycline, a semisynthetic tetracycline derivative, has been proposed as a therapeutic option for CRAB infections. Nonsusceptibility to minocycline may occur through the efflux pump, TetB. The prevalence of tetB in A. baumannii has increased, along with higher minocycline minimum inhibitory concentrations (MICs). We aimed to evaluate minocycline susceptibility rates in clinical strains of CRAB, and the association between tetB carriage and minocycline susceptibility across different genotypes. Materials and Methods: Representative CRAB blood isolates were collected from Asan Medical Center, Seoul.Minocycline susceptibility was assessed using the Clinical and Laboratory Standards Institute (CLSI) breakpoint (≤4 mg/L) and the proposed pharmacokinetics (PK)/pharmacodynamics (PD) breakpoint (≤1 mg/L). Tigecycline was used as a comparator, and its susceptibility breakpoint for Enterobacterales defined by EUCAST was applied (≤0.5 mg/L).The presence of tetB was detected by PCR, and multilocus sequence typing (MLST) was performed using seven housekeeping genes. Results: Of the 160 CRAB blood isolates, 83.8% were susceptible to minocycline by the CLSI criteria, and 50.6% were PK-PD susceptible by the PK-PD criteria. The minocycline minimum inhibitory concentration (MIC)50 /MIC90 was 1/8 mg/L. tetB was present in 49% of isolates and was associated with a higher minocycline MIC (MIC50/90 2/8 mg/L vs. 1/2 mg/L). No clear correlation was observed between tetB positivity and tigecycline MIC. Nine MLSTs were identified, with significant differences in tetB carriage rates between the major sequence types. Notably, ST191, associated with non-tetB carriage and greater susceptibility to minocycline, declined over the study period (P=0.004), while ST451, associated with tetB carriage, increased. Conclusion tetB was present in 49% of CRAB isolates and was associated with higher MICs and non-susceptibility by both CLSI and PK-PD criteria. However, absence of tetB was not a reliable predictor of minocycline PK-PD susceptibility. Additionally, shifts over time towards genotypes with reduced minocycline susceptibility were observed. Further research is needed to correlate these findings with clinical outcomes and identify additional resistance mechanisms.

Background: Carbapenem-resistant Acinetobacter baumannii (CRAB) represents a devastating and growing global threat, calling for new antibiotic treatments. In Korea, the challenge of treating CRAB is compounded by high nosocomial acquisition rates and limited availability of novel antibiotics. Minocycline, a semisynthetic tetracycline derivative, has been proposed as a therapeutic option for CRAB infections. Nonsusceptibility to minocycline may occur through the efflux pump, TetB. The prevalence of tetB in A. baumannii has increased, along with higher minocycline minimum inhibitory concentrations (MICs). We aimed to evaluate minocycline susceptibility rates in clinical strains of CRAB, and the association between tetB carriage and minocycline susceptibility across different genotypes. Materials and Methods: Representative CRAB blood isolates were collected from Asan Medical Center, Seoul.Minocycline susceptibility was assessed using the Clinical and Laboratory Standards Institute (CLSI) breakpoint (≤4 mg/L) and the proposed pharmacokinetics (PK)/pharmacodynamics (PD) breakpoint (≤1 mg/L). Tigecycline was used as a comparator, and its susceptibility breakpoint for Enterobacterales defined by EUCAST was applied (≤0.5 mg/L).The presence of tetB was detected by PCR, and multilocus sequence typing (MLST) was performed using seven housekeeping genes. Results: Of the 160 CRAB blood isolates, 83.8% were susceptible to minocycline by the CLSI criteria, and 50.6% were PK-PD susceptible by the PK-PD criteria. The minocycline minimum inhibitory concentration (MIC)50 /MIC90 was 1/8 mg/L. tetB was present in 49% of isolates and was associated with a higher minocycline MIC (MIC50/90 2/8 mg/L vs. 1/2 mg/L). No clear correlation was observed between tetB positivity and tigecycline MIC. Nine MLSTs were identified, with significant differences in tetB carriage rates between the major sequence types. Notably, ST191, associated with non-tetB carriage and greater susceptibility to minocycline, declined over the study period (P=0.004), while ST451, associated with tetB carriage, increased. Conclusion tetB was present in 49% of CRAB isolates and was associated with higher MICs and non-susceptibility by both CLSI and PK-PD criteria. However, absence of tetB was not a reliable predictor of minocycline PK-PD susceptibility. Additionally, shifts over time towards genotypes with reduced minocycline susceptibility were observed. Further research is needed to correlate these findings with clinical outcomes and identify additional resistance mechanisms.

Background: This study examined gender differences in occupational stress, depressive symptoms, and suicidal ideation by considering the potential moderating effect of grit on Korean employees. Methods: A total of 11,369 participants (7,735 men and 3,634 women) aged 19–65 years, employed across 18 private companies and local government organizations in Korea, completed questionnaires including the Short Grit Scale, Korean Occupational Stress Scale, and Center for Epidemiologic Studies Depression Scale between April 2020 and March 2022.Suicidal ideation was assessed based on its presence or absence. Mediation and moderation analyses were performed using the Statistical Package for the Social Sciences PROCESS macro. Results: Depressive symptoms partially mediated the relationship between occupational stress and suicidal ideation in male employees, whereas depressive symptoms fully mediated the relationship in female employees. Grit moderated the relationship between depressive symptoms and suicidal ideation in male employees but not in female employees.Furthermore, the moderated mediating effect of grit in male employees on the relationship between occupational stress and suicidal ideation provided less protection in cases of severe depression. The cross-sectional design does not allow for causal inferences. Conclusion These findings contribute to understanding of the gender differences in the impact of depressive symptoms on the relationship between occupational stress and suicidal ideation, as well as the protective effect of grit. These findings highlight the need for genderspecific approaches to prevent suicidal ideation among employees.

Background: This study examined gender differences in occupational stress, depressive symptoms, and suicidal ideation by considering the potential moderating effect of grit on Korean employees. Methods: A total of 11,369 participants (7,735 men and 3,634 women) aged 19–65 years, employed across 18 private companies and local government organizations in Korea, completed questionnaires including the Short Grit Scale, Korean Occupational Stress Scale, and Center for Epidemiologic Studies Depression Scale between April 2020 and March 2022.Suicidal ideation was assessed based on its presence or absence. Mediation and moderation analyses were performed using the Statistical Package for the Social Sciences PROCESS macro. Results: Depressive symptoms partially mediated the relationship between occupational stress and suicidal ideation in male employees, whereas depressive symptoms fully mediated the relationship in female employees. Grit moderated the relationship between depressive symptoms and suicidal ideation in male employees but not in female employees.Furthermore, the moderated mediating effect of grit in male employees on the relationship between occupational stress and suicidal ideation provided less protection in cases of severe depression. The cross-sectional design does not allow for causal inferences. Conclusion These findings contribute to understanding of the gender differences in the impact of depressive symptoms on the relationship between occupational stress and suicidal ideation, as well as the protective effect of grit. These findings highlight the need for genderspecific approaches to prevent suicidal ideation among employees.

Background: This study examined gender differences in occupational stress, depressive symptoms, and suicidal ideation by considering the potential moderating effect of grit on Korean employees. Methods: A total of 11,369 participants (7,735 men and 3,634 women) aged 19–65 years, employed across 18 private companies and local government organizations in Korea, completed questionnaires including the Short Grit Scale, Korean Occupational Stress Scale, and Center for Epidemiologic Studies Depression Scale between April 2020 and March 2022.Suicidal ideation was assessed based on its presence or absence. Mediation and moderation analyses were performed using the Statistical Package for the Social Sciences PROCESS macro. Results: Depressive symptoms partially mediated the relationship between occupational stress and suicidal ideation in male employees, whereas depressive symptoms fully mediated the relationship in female employees. Grit moderated the relationship between depressive symptoms and suicidal ideation in male employees but not in female employees.Furthermore, the moderated mediating effect of grit in male employees on the relationship between occupational stress and suicidal ideation provided less protection in cases of severe depression. The cross-sectional design does not allow for causal inferences. Conclusion These findings contribute to understanding of the gender differences in the impact of depressive symptoms on the relationship between occupational stress and suicidal ideation, as well as the protective effect of grit. These findings highlight the need for genderspecific approaches to prevent suicidal ideation among employees.

Cleidocranial dysplasia is a rare genetic disorder characterized by a congenital autosomal dominant condition. It leads to hypoplasia of the clavicles, abnormal formation of the teeth, and issues with skeletal and craniofacial bones. This condition is caused by a mutation in the Runt-related transcription factor 2, which is essential for the formation of teeth, cartilage, and bone. Patients with cleidocranial dysplasia exhibit typical polyostotic features, including underdeveloped clavicles, delayed closure of cranial fontanels and sutures, multiple woven bones in the skull, and dental anomalies such as failure of permanent tooth eruption, lack of deciduous tooth resorption, and multiple impacted and supernumerary teeth. This article presents a case of cleidocranial dysplasia in a 22-year-old female patient, aiming to highlight the clinical and radiological aspects of diagnosis.

Background: This study examined gender differences in occupational stress, depressive symptoms, and suicidal ideation by considering the potential moderating effect of grit on Korean employees. Methods: A total of 11,369 participants (7,735 men and 3,634 women) aged 19–65 years, employed across 18 private companies and local government organizations in Korea, completed questionnaires including the Short Grit Scale, Korean Occupational Stress Scale, and Center for Epidemiologic Studies Depression Scale between April 2020 and March 2022.Suicidal ideation was assessed based on its presence or absence. Mediation and moderation analyses were performed using the Statistical Package for the Social Sciences PROCESS macro. Results: Depressive symptoms partially mediated the relationship between occupational stress and suicidal ideation in male employees, whereas depressive symptoms fully mediated the relationship in female employees. Grit moderated the relationship between depressive symptoms and suicidal ideation in male employees but not in female employees.Furthermore, the moderated mediating effect of grit in male employees on the relationship between occupational stress and suicidal ideation provided less protection in cases of severe depression. The cross-sectional design does not allow for causal inferences. Conclusion These findings contribute to understanding of the gender differences in the impact of depressive symptoms on the relationship between occupational stress and suicidal ideation, as well as the protective effect of grit. These findings highlight the need for genderspecific approaches to prevent suicidal ideation among employees.

Purpose: The purpose of this study is to investigate the stress response and sleep state of the new patients who visit the hospital for prosthodontic treatment due to tooth loss to make reference to further treatment direction. Materials and methods: Examinations, consultations, and surveys were conducted on 236 patients (94 males, 142 females, and 24-86 years old), who newly registered at the department of prosthodontics at Pusan national university hospital, for 2 years from 2018. The number of remaining teeth, edentulous arch, possibility of mastication, and future prosthetic treatment directions were recorded. The visual analogue scale (VAS), stress response inventory (SRI) and Insomnia severity index (ISI) were used as tools to measure patient’s subjective discomfort, stress response, and sleep status. Results: Among the entire prosthodontic patient group, the average value of ‘fatigue’ was significantly higher among the 7 items of SRI, and the value of ‘aggression’ was significantly lower (P<.001). There are a significant difference between the edentulous and full dentition in the oral discomfort value measured by VAS (P=.004). In cases where less than 20 teeth remain, mastication is impossible, and patients who are planning treatment with removable prostheses, VAS value and ‘depression’ and ‘fatigue’ values in SRI were higher than those in the reverse case (P<.05).The patients showed severe level in VAS value have high value of ‘tension’, ‘somatization’, ‘depression’, ‘fatigue’and ‘frustration’in SRI than non-serious patients (P<.05). Clinical insomnia occurred in 11.4% of all patients, and women had significantly lower sleep quality than men (P=.044). Patients with insomnia showed significantly higher scores on the VAS value and all 7 SRI items than those of normal sleepers (P<.05). Conclusion The new prosthetics had high ‘fatigue’ value among the 7 items of SRI. The oral condition, number of residual teeth and mastication function and clinical insomnia affected oral discomfort and the stress response.

Calcium hydroxide has been widely used for root canal dressing material in endodontic treatment. This report describes that when the accurate diagnosis and proper nonsurgical endodontic retreatment is applied to periapical lesion with accidentally extruded calcium hydroxide paste, the lesion can be successfully treated. Overfilled calcium hydroxide can affect the healing process, so the overextension of calcium hydroxide agent should be avoided.