• 보존과학회지
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• 제38권4호
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• pp.301-313
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• 2022

We made a Korean white porcelain or Joseon Baekja jar and based on the raw materials used and reproductions of each stage, we aimed to compare and analyze the physicochemical changes of the raw materials such as clay at each manufacturing stage, as well as identify the characteristics and correlations. Although the basic main components of clay and glaze material are similar, their texture becomes denser in the process of bisque firing pottery (Chobeol-pyeon) and glaze firing pottery (Jaebeol-pyeon), and we confirmed that in addition to the tendency of increasing vitrification, low-temperature minerals such as mica and illite gradually disappeared, while high-temperature minerals such as cristobalite were newly created. This phenomenon has also been verified by the rapid decrease in absorption rate while the change in specific gravity was small. In addition, the color was greatly affected by the firing atmosphere, and the yellow-red chromaticity of the raw materials was higher during bisque firing but showed a rapidly decreasing characteristic during glaze firing. The value of magnetic susceptibility, which is related to iron (Fe) component, showed a tendency to decrease in glaze firing pottery. CT images were confirmed as a method that can indirectly estimate the change in the material properties of the object step-by-step for the entire object. In conclusion, the study of manufacturing stages of reproduction can provide basic data for scientific research on the estimation of porcelain and pottery making technology and changes in raw materials.

• Journal of Acupuncture Research
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• 제40권1호
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• pp.16-34
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• 2023

Herpes zoster (HZ) results from the reactivation of a varicella-zoster virus infection and is accompanied by moderate-to-severe pain in most patients. The most common treatment is medication; however, there are still limitations. Acupuncture reportedly has meaningful therapeutic effects and is a possible alternative option in HZ. However, no systematic reviews examining the use of acupuncture and electro-acupuncture (EA) alone have been published; in this study, we therefore aimed to systematically review those techniques. We searched for clinical trials of acupuncture and EA treatment for HZ up to October 2022. Trials that used acupuncture were included. Outcomes were visual analog scale (VAS) and effective rate. Secondary outcomes were time to pain relief, time to pain elimination, incrustation, decrustation, lastly incidence of post-herpetic neuralgia (PHN). In total, 22 randomized controlled trials were included in this research. Compared with conventional medication therapy, acupuncture was associated with a significant improvement in VAS, effective rate, and times to pain relief and elimination. Times to new blister cessation, incrustation, and decrustation (days) were significantly improved. Furthermore, the incidence rate of PHN was lower in acupuncture groups. The results suggest that acupuncture could be a reasonable treatment option for patients with HZ who suffer from pain and accompanying symptoms.

• Journal of Acupuncture Research
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• 제40권1호
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• pp.35-43
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• 2023

Background: This study aimed to examine the effect of Scutellaria baicalensis extract (SBE) on ameliorating pain response and inflammation in an animal model. Methods: The effects of SBE on joint inflammation-induced rats and pain writhing response were measured. In rats with monosodium iodoacetate (MIA)-induced knee osteoarthritis (OA), the weight-bearing distribution of the hind legs was measured, the actual joint condition was visually confirmed, and serum cytokines were extracted from whole blood and measured. In addition, the acetic acid-induced pain was measured by the number of abdominal wall contractions and writhing responses. Results: 1. The weight-bearing distribution of the hind limbs of the SBE group was remarkably improved compared with that of the control group 7 days after MIA treatment, and the SBE 300 group was improved similarly to that of the indomethacin group. 2. Cartilage erosion was significantly recovered in the SBE and indomethacin groups, and the degree of healing of cartilage erosion by SBE was similar to that by indomethacin. 3. The serum levels of cytokines interleukin-1β, tumor necrosis factor-α, and interleukin-6 were significantly decreased in the SBE group compared with that in the control group, and the SBE 300 group had reduced levels of cytokines similar to the indomethacin group. 4. As regards acetic acid-induced writhing response, the number of writhes was significantly reduced in the SBE and ibuprofen groups, and the SBE 600 group had fewer writhes than the ibuprofen group. Conclusion: SBE significantly improves knee OA and pain and is expected to show similar therapeutic effects to indomethacin and ibuprofen.

• Journal of Acupuncture Research
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• 제40권2호
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• pp.111-128
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• 2023

Trigger finger is a common cause of hand disability that results in finger catching, clicking, or locking. Conventional treatment options such as medication, injection, and surgery have limitations. Studies have indicated that acupuncture and acupotomy can be effective in treating trigger finger. However, no review regarding these treatment modalities has been published yet. This review included randomized controlled trials published until January 2023, investigating acupuncture-related interventions. The primary outcomes of interest included the effectiveness rate (ER) and pain intensity, measured using a visual analog scale (VAS) and Numerical Rating Scale (NRS), and secondary outcomes were the Quinnell grade (QG) and recurrence rate (RR). Adverse events (AEs) have also been reported wherever available. Overall, 19 studies were included, and results demonstrated that arcedge acupuncture improved the ER and QG and reduced NRS, and acupuncture was effective in reducing VAS. Compared with conventional surgery, acupotomy alone improved the ER and QG and lowered VAS and RR, with relatively fewer AEs. Acupotomy add-on treatment was more effective than conventional treatment; however, careful interpretation is needed for VAS. Acupotomy add-on treatment was more effective than acupotomy alone. However, the overall results must be interpreted with caution because of study quality, small sample size, and heterogeneity of the results.

• Journal of Acupuncture Research
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• 제40권3호
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• pp.238-244
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• 2023

Background: Occipital neuralgia (ON) is an established risk factor for headaches in the posterior cervical region. Several conservative treatments by nerve decompression and pain relief are available for ON, but these treatments have limitations. Acupuncture treatment, which is known to demonstrate analgesic effects, involves various stimulation methods, and several studies have reported their clinical benefit. No recent systematic review (SR) has compared each acupuncture type for ON treatment. Thus, this SR aims to investigate the clinical effectiveness of each acupuncture type for treating ON. Methods: We will identify relevant studies using electronic databases, including EMBASE, MEDLINE, Cochrane Library, China National Knowledge Infrastructure (CNKI), Korean Studies Information Service System (KISS), Korean Medical Database, KoreaMed, and National Digital Science Library (NDSL) from the inception until August 2023. The primary outcome will include the numerical change of pain symptoms (visual analog scale and numerical rating scale) and effective rate. Safety and secondary outcomes will include adverse events and quality of life. We will compare the conservative treatment with the acupuncture treatment using network meta-analysis. The Cochrane Collaboration "risk of bias" tools will be used to assess the quality of included trials. The Grades of Recommendation, Assessment, Development, and Evaluation will be used to examine the evidence level. Conclusion: This study will provide clinical evidence of several acupuncture types for ON and help clinicians decide on the best.

• Journal of Acupuncture Research
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• 제40권3호
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• pp.252-264
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• 2023

Background: The primary aim of this study is to statistically analyze and compare the difference in treatment outcomes based on the frequency and duration of acupotomy treatment for lumbar disk herniation. Methods: The evaluation of efficacy and safety involved using visual analog scale (VAS), numeric rating scale (NRS), Roland Morris disability questionnaire (RMDQ), EuroQol 5-dimention (EQ-5D), and similar parameters. This was achieved through the establishment of a comparable cohort using propensity score matching. Group A comprised 46 patients who underwent 4 sessions of acupotomy treatment for 2 weeks, while Group B consisted of 15 patients who received 6 acupotomy sessions for 3 weeks. Results: For Group A, the average amount of change in VAS values at weeks 4 and 6 was significantly decreased. However, the average amount of change in RMDQ values was not significant. Notably, the average amount of change of EQ-5D values at week 6 increased significantly. As for Group B, the average amount of change of NRS values in weeks 2 and 3 was significantly decreased. Conversely, the average amount of change in RMDQ and EQ-5D values was not significant. In comparing the 2 groups at the final follow-up, the average amount of change in all evaluation values was not significant. Further, no significant interaction effect was observed in the changes over time in all evaluation values between the 2 groups. Conclusion: This study establishes that there was no statistically significant difference in pain reduction, functional impairment, and quality of life improvement between 2 group.

• Journal of Acupuncture Research
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• 제40권3호
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• pp.214-237
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• 2023

This study aimed to evaluate the clinical efficacy and safety of acupuncture and electroacupuncture for temporomandibular joint disorder (TMD). We searched 11 databases to find randomized-controlled trials (RCTs) published between January 2018 and January 2023 that used acupuncture and electroacupuncture to treat patients with TMD. We performed a meta-analysis of 18 RCTs involving 1,109 patients. Nine studies reported that the treatment and control groups showed improvement in the evaluation index post-treatment. The results of the meta-analysis showed that the treatment groups receiving acupuncture combined with manual therapy had significantly improved visual analog scale score and dysfunction index than the control groups receiving manual therapy. Moreover, the treatment groups receiving acupuncture combined with Western medicine had statistically improved maximum mouth opening than the control groups using Western medicine. In conclusion, acupuncture and electroacupuncture have clinical effects on TMD patients. Given that 11 studies were obtained from the Chinese database, a regional bias would be considered. Furthermore, the included studies had high a risk of bias in terms of randomization, concealment, and blinding. Further studies are required to correct these limitations.

• Journal of Acupuncture Research
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• 제39권2호
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• pp.96-104
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• 2022

This study aimed to examine the clinical efficacy of electroacupuncture treatment for carpal tunnel syndrome by reviewing published randomized controlled trials. Among the 186 studies retrieved from 7 online databases (PubMed, Cochrane library, CNKI, NDSL, RISS, OASIS, KMbase) on October 29, 2021, 4 studies were selected according to the inclusion, exclusion criteria, and were evaluated using risk of bias. Control groups for electroacupuncture were wearing a splint at night, traditional acupuncture, and medication. Methods such as total effective, functional status scale, symptom severity scale, electromyography, tip pinch strength, visual analogue scale, numeric rating scale, and ultrasound were used to evaluate the therapeutic effect. Electroacupuncture was reported to have significant treatment results compared with the control group in methods such as total effectiveness, electromyography, and tip pinch strength. However, the quality of the studies (using risk of bias) does not allow reliable conclusions to be made. Many high quality (low risk of bias) randomized controlled trials are needed to examine the efficacy of electroacupuncture treatment for carpal tunnel syndrome.

• 박물관보존과학
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• 제1권
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• pp.37-42
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• 1999

국립김해박물관 개관전시 유물인 가야시대 토기(土器) 기대(器臺) 2점과 중앙박물관의 특별전 "고대국가의 형성" 전시회 출품 유물인 청자사이호(靑磁四耳壺)에 대한 보존처리를 수행하였다. 육안 및 실체현미경 관찰을 통하여 처리전 상태, 문양(文樣)과 제작기법(製作技法) 등을 파악하였고 이를 토대로 각 유물의 특성에 맞는 보존처리를 실시하였다. 기대는 결실부분이 커 에폭시계(系) 복원재료를 이용해 파손된 토기 면(面)과 직접 접착시켜 형태를 복원하고 문양과 색, 질감을 유사(類似)하게 처리하였다 청자는 토기와 같은 복원재를 이용했지만 파손된 청자 면과 분리(分離)시켜 형태를 복원하여 해체가 가능하도록 조치한 다음 색과 질감도 구분이 되도록 처리하였다.

• 한국재료학회지
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• 제33권2호
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• pp.63-70
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• 2023

In this study, crystallization was effectively suppressed in Al-based metallic glasses (Al-MGs) during pulverization by cryo-milling by applying an extremely low processing temperature and using a surfactant. Before Al-MGs can be used as an additive in Ag paste for solar cells, the particle sizes of the Al-MGs must be reduced by milling. However, during the ball milling process crystallization of the Al-MG is a problem. Once the Al-MG is crystallized, they no longer exhibit glass-like behavior, such as thermoplastic deformation, which is critical to decrease the electrical resistance of the Ag electrode. The main reason for crystallization during the ball milling process is the heat generated by collisions between the particles and the balls, or between the particles. Once the heat reaches the crystallization temperature of the Al-MGs, they start crystallization. Another reason for the crystallization is agglomeration of the particles. If the initially fed particles become severely agglomerated, they coalesce instead of being pulverized during the milling. The coalesced particles experience more collisions and finally crystallize. In this study, the heat generated during milling was suppressed by using cryo-milling with liquid-nitrogen, which was regularly fed into the milling jar. Also, the MG powders were dispersed using a surfactant before milling, so that the problem of agglomeration was resolved. Cryo-milling with the surfactant led to D50 = 10 um after 6 h milling, and we finally achieved a specific contact resistance of 0.22 mΩcm² and electrical resistivity of 2.81 μΩcm using the milled MG particles.