A machine learning based decision tree analysis of influential factor for the number of remaining teeth in Korean adults / 대한구강보건학회지

Objectives@#This study aims to investigate the effect of determinants on the number of remaining teeth in Korean adults using a machine learning-based decision tree analysis. @*Methods@#The study used data from the Korea National Health and Nutrition Examination Survey (KNHANES) VII (2016-2018) and a decision-tree analysis to explain the causes for the number of remaining teeth in adults. The determinants for the study are sex, age, house income, education level, diabetes, BMI, smoking, alcohol drinking, tooth brushing per day, and periodontitis. @*Results@#Age had the most significant effect on the number of remaining teeth, followed by house income. @*Conclusions@#This research is meaningful as it provides a systematic index in the number of remaining teeth in Korean adults based on a combination of numerous variables. These variables have already been validated against the results of previous studies that have attempted to elucidate new variables affecting the number of remaining teeth.

Impact of Response to Violence and Resilience to Burnout in Emergency Department Nurses / 임상간호연구

PURPOSE: The purpose of this study was to identify the relationship between response to violence, resilience and burnout and to investigate the factors that affect burnout in emergency room nurses. METHODS: Data from 237 nurses in 15 emergency rooms were collected using a structured questionnaire. Data were analyzed using SPSS 23.0, and the analyses included descriptive statistics, t-test, Mann-Whitney test, ANOVA, Kruskall Wallis test, Pearson correlation, and hierarchical multiple regression. RESULTS: Burnout was positively correlated with response to violence and negatively correlated with resilience in emergency room nurses. Response to violence (β=.466, p<.001), resilience (β=−.308, p<.001), and religion (β=−.131, p=.011) were significant predictors of burnout, and they explained 39.9% of emergency room nurses' burnout. CONCLUSION: Response to violence and resilience were identified as significant factors affecting burnout in emergency room nurses. Therefore, it is necessary to develop strategies to cope effectively with violence and to develop programs that can strengthen resilience.

Health effects from exposure to dental diagnostic X-ray

The purpose of this review is to summarize the results of studies on of the association between exposure to dental X-rays and health risk. To perform the systematic review, We searched the PUBMED, EMBASE, and MEDLINE databases for papers published before December 15, 2016. A total of 2 158 studies, excluding duplicate studies, were found. Two reviewers independently evaluated the eligibility of each study. The final 21 studies were selected after application of exclusion criteria. In terms of health outcomes, there were 10 studies about brain tumors, 5 about thyroid cancer, 3 about tumors of head and neck areas, and 3 related to systemic health. In brain tumor studies, the association between dental X-ray exposure and meningioma was statistically significant in 5 of the 7 studies. In 4 of the 5 thyroid-related studies, there was a significant correlation with dental diagnostic X-rays. In studies on head and neck areas, tumors included laryngeal, parotid gland, and salivary gland cancers. There was also a statistically significant correlation between full-mouth X-rays and salivary gland cancer, but not parotid gland cancer. Health outcomes such as leukemia, low birth weight, cataracts, and thumb carcinomas were also reported. In a few studies examining health effects related to dental X-ray exposure, possibly increased risks of meningioma and thyroid cancer were suggested. More studies with a large population and prospective design are needed to elaborate these associations further.

Health effects from exposure to dental diagnostic X-ray

The purpose of this review is to summarize the results of studies on of the association between exposure to dental X-rays and health risk. To perform the systematic review, We searched the PUBMED, EMBASE, and MEDLINE databases for papers published before December 15, 2016. A total of 2 158 studies, excluding duplicate studies, were found. Two reviewers independently evaluated the eligibility of each study. The final 21 studies were selected after application of exclusion criteria. In terms of health outcomes, there were 10 studies about brain tumors, 5 about thyroid cancer, 3 about tumors of head and neck areas, and 3 related to systemic health. In brain tumor studies, the association between dental X-ray exposure and meningioma was statistically significant in 5 of the 7 studies. In 4 of the 5 thyroid-related studies, there was a significant correlation with dental diagnostic X-rays. In studies on head and neck areas, tumors included laryngeal, parotid gland, and salivary gland cancers. There was also a statistically significant correlation between full-mouth X-rays and salivary gland cancer, but not parotid gland cancer. Health outcomes such as leukemia, low birth weight, cataracts, and thumb carcinomas were also reported. In a few studies examining health effects related to dental X-ray exposure, possibly increased risks of meningioma and thyroid cancer were suggested. More studies with a large population and prospective design are needed to elaborate these associations further.

Sonographic Appearance of Idiopathic Hypertrophy of the First Dorsal Interosseous Muscle of the Hand

We present a rare case of a 28-year-old man with a non-tender soft tissue enlargement on the dorsal side of the first web space of the right hand. Sonographic evaluation showed thickening of the dorsal thenar muscle (dorsal interosseous muscle) without a mass-like or cystic lesion, as compared with the left dorsal thenar muscle. On grasping position, this finding was more prominent and no significantly increased vascular flow was observed in this muscle. We were able to diagnose idiopathic hypertrophy of the first dorsal interosseous muscle solely by sonography. Ultrasonographic evaluation is a noninvasive and accessible tool for diagnosis of pseudotumors, such as idiopathic thenar muscle hypertrophy.

Pure Epidural Cavernous Hemangioma in Thoracic Region: A Case Report / 대한정형외과학회잡지

Cavernous hemangiomas are uncommon vascular malformations. In the spine, lesions of the vertebral bodies are most common. However, intramedullary and intradural extramedullary lesions of the spine are uncommon, and purely epidural lesions are very rare. We report upon a case of pure epidural cavernous hemangioma in the thoracic region.

Kummell's Disease Managed by Percutaneous Vertebroplasty / 대한척추외과학회지

STUDY DESIGN: Prospective study about fourteen consecutive patients with Kummell's disease who were treated by percutaneous vertebroplasty with bone cement. OBJECTIVES: To evaluate the results of percutaneous vertebroplasty using bone cement in the treatment of Kummell's disease. SUMMARY OF LITERATURE REVIEW: Kummell's disease is a rarely reported, poorly documented, and poorly understood phenomenon. It is associated with intravertebral vacuum phenomenon and clinically manifested by painful kyphosis. The treatment of the disease had been conservative or surgical reconstruction, but both conservative and operative treatment were not satisfactory in some patients. MATERIALS AND METHODS: A review was conducted of 14 patients with 18 vertebrae treated with percutaneous vertebroplasty from June 1999 to May 2000. They had posttraumatic vertebral collapse or Kummell's disease and had failed medical therapy. Immediate and long-term pain response and complications of percutaneous vertebroplasty with bone cement were evaluated. RESULTS: All patients reported complete relief of pain within the first 24 hours. Ten(71.5%) were evaluated as excellent; three(21.4%), good; one(7.1%), fair until 3 months postoperatively. Eight(57.2%) were evaluated as excellent; four(28.6%), good; fair(7.1%), one; poor(7.1%), one at final follow-up. Five(35.7%) patients had cement extrusion into the disc, paravertebral vessels and epidural space without significant systemic symptoms. CONCLUSIONS: For patients with posttraumatic vertebral collapse or Kummell's disease, percutaneous vertebroplasty technique using bone cement would be a minimally invasive treatment option to achieve immediate relief of pain and stabilization without significant side effects.

Reconstruction of Posterior Cruciate Ligament Using Bone-Patella Tendon-Bone Allograft - Two - to Four - Year Follow - Up Results

No Abstract Available.

Arthroscopic Anterior Cruciate Ligament Reconstruction Using Bone-Patellar Tendon-Bone Autograft: A Two-to Six-Years Follow-Up Evaluation / 대한정형외과학회잡지

PURPOSE: To evaluate the clinical stability and function after an arthroscopic anterior cruciate ligament (ACL) reconstruction using a bone-patellar tendon-bone autograft. MATERIALS AND METHODS: Fifty-nine patients could be evaluated and the mean follow-up period was 47 months (24-75 months). The evaluation included a detailed history, a physical examination, a KT-1000 arthrometer measurement, and the rating systems of Lysholm, IKDC and Shelbourne. RESULTS: Fifty-four patients (92%) had a negative pivot shift. Forty-five patients (77%) had a negative Lachman test. Forty-eight patients (82%) had less than a 3 mm difference of maximal manual difference by KT-1000 arthrometer. The prone heel height difference was less than 1 cm in 37 patients (63%). The mean Lysholm score was 89.5. Forty-five patients (76%) were normal or nearly normal for the measured parameters. Patello-femoral pain was not a significant problem for most of the patients who had a mean Shelbourne score of 88.5. CONCLUSION: Reconstruction of the ACL with a bone-patellar tendon-bone autograft resulted in a reliable and predictable outcome without having significant patello-femoral pain after 2 to 6 years'follow-up.