• Title/Summary/Keyword: Non-clinical trial

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Clinical comparison of marginal fit of ceramic inlays between digital and conventional impressions

  • Franklin Guillermo Vargas-Corral;Americo Ernesto Vargas-Corral;Miguel Angel Rodríguez Valverde;Manuel Bravo;Juan Ignacio Rosales Leal
    • The Journal of Advanced Prosthodontics
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    • v.16 no.1
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    • pp.57-65
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    • 2024
  • PURPOSE. The aim of this stuldy was to compare the clinical marginal fit of CAD-CAM inlays obtained from intraoral digital impression or addition silicone impression techniques. MATERIALS AND METHODS. The study included 31 inlays for prosthodontics purposes of 31 patients: 15 based on intraoral digital impressions (DI group); and 16 based on a conventional impression technique (CI group). Inlays included occlusal and a non-occlusal surface. Inlays were milled in ceramic. The inlay-teeth interface was replicated by placing each inlay in its corresponding uncemented clinical preparation and taking interface impressions with silicone material from occlusal and free surfaces. Interface analysis was made using white light confocal microscopy (WLCM) (scanning area: 694 × 510 ㎛2) from the impression samples. The gap size and the inlay overextension were measured from the microscopy topographies. For analytical purposes (i.e., 95-%-confidence intervals calculations and P-value calculations), the procedure REGRESS in SUDAAN was used to account for clustering (i.e., multiple measurements). For p-value calculation, the log transformation of the dependent variables was used to normalize the distributions. RESULTS. Marginal fit values for occlusal and free surfaces were affected by the type of impression. There were no differences between surfaces (occlusal vs. free). Gap obtained for DI group was 164 ± 84 ㎛ and that for CI group was 209 ± 104 ㎛, and there were statistical differences between them (p = .041). Mean overextension values were 60 ± 59 ㎛ for DI group and 67 ± 73 ㎛ for CI group, and there were no differences between then (p = .553). CONCLUSION. Digital impression achieved inlays with higher clinical marginal fit and performed better than the conventional silicone materials.

Study Trends on Acupuncture Treatment of Cancer (암(癌)에 대한 침치료(鍼治療)의 연구(硏究) 동향(動向))

  • Nam, Dong-Woo;Lee, Jae-Dong;Choi, Do-Young
    • Journal of Acupuncture Research
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    • v.24 no.1
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    • pp.209-216
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    • 2007
  • Objectives : To review and summarize the existing evidence on acupuncture treatment for cancer and cancer related symptoms. Methods: Literature searches were made through domestic and international databases. Data were extracted according to pre-defined criteria. The methodological quality was assessed using the Modified Jadad scale. Results: Seven studies were included. Two of the studies were high in methodological quality. One study concerning acupuncture treatment for cancerous dyspnea reported insignificant differences between the treatment group and placebo group. The other study concerning auricular acupuncture for cancer related pain showed significant pain relief compared with the control group. All the other studies were non-blinded or uncontrolled trials. Conclusion : The hypothesis that acupuncture may be effective for the treatment of cancer is not supported by the data in recent clinical trials. More accurately designed randomized control trials (RCT) are needed.

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Surgical Management of Esophageal Carcinoma after Esophageal Prosthesis (인공 식도를 삽입한 식도암 환자의 수술치험 4례)

  • 박승훈
    • Journal of Chest Surgery
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    • v.28 no.1
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    • pp.90-95
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    • 1995
  • Effective relief of dysphagia in unresectable esophageal cancer patients not only prolong survival but also is prerequisite for other treatment modalities.We tried surgical resection in 4 patients who had unresectable esophageal cancer,managed initially with esophageal prosthesis then followed by chemotherapy with good response. Curative resection was possible in 2 patients and palliative resection in one and exploration only in one case.Curatively resected patients are alive without recurrence for 57 months,8 months,each.Other non-curatively resected patients died after 10 months,7 months. Above results suggest that initial esophageal prosthesis to relieve dysphagia followed by chemotherapy in unresectable esophageal cancer may provide another chances for curative resection that promise better survival and need more clinical experience and trial.

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Sodium-Glucose Cotransporter 2 Inhibitors for Chronic Kidney Disease: A Comprehensive Review (SGLT2 억제제와 만성 콩팥병)

  • Su Hyun Song;Eun Hui Bae
    • The Korean Journal of Medicine
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    • v.99 no.2
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    • pp.61-68
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    • 2024
  • Chronic Kidney Disease (CKD) is a major global health burden. Sodium-glucose cotransporter-2 (SGLT2) inhibitors have demonstrated potential in slowing CKD progression. We evaluated the expanding role of SGLT2 inhibitors, emphasizing their renoprotective benefits in diabetic and non-diabetic CKD patients. We also investigated the underlying mechanisms, including the reduction of glomerular hypertension via modulation of tubuloglomerular feedback. Our study critically analyzed current indications for SGLT2 inhibitor therapy based on recent clinical trial data. To optimize patient outcomes, we present a comprehensive analysis of practical considerations for the prescription of SGLT2 inhibitors, including the potential initial decline in the estimated glomerular filtration rate and a review of adverse events.

A Review on Clinical Research Trends in the Treatment of Hatha-Style Yoga for Post Traumatic Stress Disorder (외상후 스트레스장애에 대한 하타 스타일 요가 치료의 해외 임상연구 동향)

  • Hong, Hee-Yeon;Hong, Min-Ho;Koo, Byung-Su;Kim, Geun-Woo
    • Journal of Oriental Neuropsychiatry
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    • v.31 no.1
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    • pp.13-23
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    • 2020
  • Objectives: The purpose of this study was to review the research trends in the treatment of hatha-style yoga on Post Traumatic Stress Disorder (PTSD). Methods: We searched articles in Pubmed and the China National Knowledge Infrastructure (CNKI) January 2010-December 2019, for studies to treat PTSD using hatha-style yoga. Selected studies were evaluated by the CLEAR-NPT (A Checklist to Evaluate a Report of a Non-pharmacological Trial). Results: Seven randomized controlled clinical trials were selected. PSS-I (PTSD Symptom Scale-Interview) was the most frequently used as diagnostic criteria. The PCL (PTSD Checklist) was also the most commonly used outcome measurement. Of the seven articles, most studies reported that hatha-style yoga was effective to reduce symptoms of PTSD. Conclusions: Hatha-style yoga practice intervention can be used to relieve symptoms of PTSD. More studies should be conducted to make hatha-style yoga as protocol (complementary therapy) for PTSD patients.

Survival rates against fracture of endodontically treated posterior teeth restored with full-coverage crowns or resin composite restorations: a systematic review

  • Suksaphar, Warattama;Banomyong, Danuchit;Jirathanyanatt, Titalee;Ngoenwiwatkul, Yaowaluk
    • Restorative Dentistry and Endodontics
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    • v.42 no.3
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    • pp.157-167
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    • 2017
  • This systematic review aims to summarize the current clinical studies that investigated survival rates against fracture of endodontically treated posterior teeth restored with crowns or resin composite restorations. Literature search were performed using keywords. Publications from 1980 to 2016 were searched in PubMed, ScienceDirect, ISI Web of SCIENCE, MEDLINE, and SCOPUS. Included studies were selected based on inclusion and exclusion criteria. Three clinical studies were included: 1 randomized controlled trial and 1 prospective and 1 retrospective cohort studies. Pooled survival rates ranged from 94%-100% and 91.9%-100% for crowns and resin composite, respectively. The majority of teeth had no more than 3 surface loss of tooth structure. The studies included were heterogeneous, and were not appropriate for further meta-analysis. Current evidence suggested that the survival rates against the fracture of endodontically treated posterior teeth restored with crowns or resin composites were not significantly different in the teeth with minimum to moderate loss of tooth structure.

Non-inferiority study of the efficacy of two hyaluronic acid products in post-extraction sockets of impacted third molars

  • Yang, Hyunwoo;Kim, Junghun;Kim, Jihong;Kim, Dongwook;Kim, Hyung Jun
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.42
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    • pp.40.1-40.5
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    • 2020
  • Background: Hyaluronic acid (HA) is well known to exert an anti-inflammatory effect during oral wound healing and is commonly applied after tooth extraction. However, no double-blind randomized controlled study comparing two hyaluronate mouthwash products has been conducted so far. The aim of this study was to comparatively analyze the efficacy of Mucobarrier® and Aloclair® in terms of clinical symptoms. Results: A total of 112 patients were randomly assigned to assess the degree of discomfort, pain reduction, redness, burning sensation, and swelling between two groups on the day of surgery and 7 days later in a double blind test, with a total 56 Aloclair patients and 56 Mucobarrier patients. There was no statistically significant difference in the overall discomfort, degree of pain reduction, redness, burning sensation, and swelling between the Mucobarrier and Aloclair groups. Conclusion: The local application of hyaluronic acid mouth wash after wisdom tooth extraction is beneficial in reducing overall discomfort and pain reduction, and the clinical utility of Mucobarrier® is no different from Aloclair®. Trial registration: Institutional Review Board of Yonsei University College of Dentistry, 2-2018-0036. Registered 10 September 2018-prospectively registered, https://eirb.yuhs.ac/

Effects of Oral Gargling with Aroma Solution in Psychiatric Inpatients: A Non-Randomized Controlled Trial (입원 정신질환자의 아로마용액 구강함수 효과: 비무작위 대조군 설계)

  • Jung, Yun Ah;Kim, Hee Sook
    • Journal of Korean Academy of Nursing
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    • v.50 no.2
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    • pp.200-209
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    • 2020
  • Purpose: The purpose of this study was to examine the effects of oral gargling with an aromatic solution on xerostomia, objective oral status, and oral health-related quality of life in psychiatric inpatients. Methods: A nonequivalent control group with a non-synchronized design was used in this study. The experimental group (n=34) received oral gargling with an aroma solution, while the control group (n=33) gargled with 0.9% normal saline. Dependent variables were measured at pre-, post-, and follow-up test. Data were analyzed using an χ2-test, Fisher's exact probability test, t-tests, and repeated measures ANOVA using SPSS/WIN v.21.0. Results: After the intervention, significant differences were revealed in xerostomia (F=15.30, p<.001), objective oral status (F=38.44, p<.001), and oral health-related quality of life (F=62.70, p<.001) with an interaction effect between group and time. Conclusion: These findings indicate that gargling with an aroma solution is more effective than 0.9% normal saline for the oral health of psychiatric inpatients. Therefore gargling with an aroma can be safely recommended as a brief, economical, and positive intervention in clinical settings.

Estimating survival distributions for two-stage adaptive treatment strategies: A simulation study

  • Vilakati, Sifiso;Cortese, Giuliana;Dlamini, Thembelihle
    • Communications for Statistical Applications and Methods
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    • v.28 no.5
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    • pp.411-424
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    • 2021
  • Inference following two-stage adaptive designs (also known as two-stage randomization designs) with survival endpoints usually focuses on estimating and comparing survival distributions for the different treatment strategies. The aim is to identify the treatment strategy(ies) that leads to better survival of the patients. The objectives of this study were to assess the performance three commonly cited methods for estimating survival distributions in two-stage randomization designs. We review three non-parametric methods for estimating survival distributions in two-stage adaptive designs and compare their performance using simulation studies. The simulation studies show that the method based on the marginal mean model is badly affected by high censoring rates and response rate. The other two methods which are natural extensions of the Nelson-Aalen estimator and the Kaplan-Meier estimator have similar performance. These two methods yield survival estimates which have less bias and more precise than the marginal mean model even in cases of small sample sizes. The weighted versions of the Nelson-Aalen and the Kaplan-Meier estimators are less affected by high censoring rates and low response rates. The bias of the method based on the marginal mean model increases rapidly with increase in censoring rate compared to the other two methods. We apply the three methods to a leukemia clinical trial dataset and also compare the results.

Effects of Ankle and Hip Strategy Training on Improving the Center of Pressure Movements and Limits of Stability in Stroke Patients

  • Park, Shinjun;Park, Sunghyun;Kim, Yongyoun
    • Journal of International Academy of Physical Therapy Research
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    • v.10 no.3
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    • pp.1823-1829
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    • 2019
  • Background: Stroke patients have leg muscle weakness and impaired balance resulting in compensatory changes. To restore balance in these patients, functional training using postural strategy is needed. Objective: To examine the effects of ankle and hip strategy training on the center of pressure (COP) movement and limits of stability (LOS) in standing posture in stroke patients. Design: The study was an assessor-blinded and randomized-controlled clinical trial. Methods: Thirty patients were randomly assigned to an ankle strategy training group and a ankle/ hip strategy training group. Patients in the ankle strategy training group underwent ankle strategy exercise for 30 min, and those in the ankle/ hip strategy training group underwent 15 min of ankle strategy exercise and 15 min of hip strategy exercise. Both groups underwent training thrice a week for four weeks. Forward, backward, paretic side, and non-paretic side COP movements and LOS were measured using BioRescue. Results: After the intervention, except for the backward area in the ankle strategy training group, the COP movement area and the LOS were significantly improved in both the groups. In addition, these improvements were significantly higher in ankle/ hip strategy training group than that in the ankle strategy training group. Conclusions: Ankle strategy training in addition to hip strategy training improves COP movement (forward-backward, paretic side area, and non-paretic side area) and LOS in stroke patients.