• Journal of Chest Surgery
• /
• 제55권6호
• /
• pp.462-469
• /
• 2022

Background: Carotid endarterectomy (CEA) is used to treat carotid stenosis, which is associated with cerebral infarction and may result in neurologic deficits such as stroke, transient ischemic attack (TIA), and local nerve injury. To decrease surgery-related complications and improve patient satisfaction with esthetic outcomes, efforts have been made to minimize incision size instead of using a standard longitudinal incision. Methods: We performed a retrospective analysis of 151 cases of CEA, of which 110 used conventional incisions and 41 used high mini-skin incisions (HMIs), from March 2015 to December 2021 at a single institution. Short-term (30-day) postoperative results were evaluated for rates of mortality, stroke, TIA, and cranial/cervical nerve injuries. Risk factors for nerve injury were also assessed. Results: The HMI group showed significantly (p<0.01) shorter operative and clamp times than the conventional group. The HMI group also had significantly shorter incision lengths (5.3±0.9 cm) than the conventional group (11.5±2.8 cm). The rates of stroke, TIA, and death at 30 days were not significantly different between the 2 groups. There was no significant difference in the rate of cranial and cervical nerve injuries, and all injuries were transient. A high lesion level (odds ratio [OR], 9.56; 95% confidence interval [CI], 3.21-28.42; p<0.01) and the clamp time (OR, 1.07; 95% CI, 1.03-1.12; p<0.01) were found to be risk factors for nerve injuries. Conclusion: Use of the HMI in CEA for carotid stenosis was advantageous for its shorter operative time, shorter internal carotid artery clamp time, reduced neurologic complications, and improved esthetics.

• Archives of Plastic Surgery
• /
• 제48권6호
• /
• pp.614-621
• /
• 2021

Background Reconstruction of congenital microtia remains challenging, particularly in patients with a history of ear canaloplasty due to insufficient regional soft tissue. The insertion of a tissue expander prior to implantation of the cartilage framework has traditionally been employed. However, this procedure could induce additional morbidity. Herein, we present a method using V-Y advancement of a temporal triangular flap to gain additional soft tissue in these challenging cases. Methods Congenital microtia patients with a history of ear canaloplasty who underwent auricular reconstruction using the Nagata technique between 2016 and 2020 were reviewed. To obtain additional soft tissue, V-Y advancement of a temporal triangular flap was performed concurrently with implantation of the costal cartilage framework, without prior insertion of a tissue expander. The outcomes of these patients with respect to postoperative complications and esthetics were evaluated. Results Eight patients with bilateral lesions were included. No specific complications developed after the first-stage surgery. However, one patient experienced complications after the second stage (auricular elevation). An analysis of the esthetic results showed most patients had excellent outcomes, achieving a satisfactory convolution. The median number of operations needed to complete reconstruction was 2, which was fewer than required using the conventional method with prior insertion of a tissue expander. Conclusions In patients with a history of previous canaloplasty, V-Y advancement of a temporal triangular flap could serve as an alternative to tissue expansion for microtia reconstruction. This technique provided reliable and satisfactory results with a reduced number of surgical stages.

• 한국도서관정보학회지
• /
• 제53권3호
• /
• pp.1-24
• /
• 2022

본 연구는 체험경제이론을 반영한 북큐레이션 교육 프로그램을 개발, 실행한 후에 프로그램에 대한 인식이 지각된 가치와 지속적 참여 의도에 미치는 영향력을 분석하려는데 목적이 있다. 본 연구에서 개발한 북큐레이션 교육 프로그램은 체험경제이론에 따른 4가지 요소 즉, 오락적 경험, 교육적 경험, 현실 도피적 경험, 심미적 경험을 교수·학습 활동에 반영하였다. 이 연구는 프로그램의 효과를 측정하기 위해 프로그램에 참여한 195명을 대상으로 설문조사를 실시하였다. 이를 분석한 결과, 연구가설 1(북큐레이션 교육 프로그램의 경험에 대한 인식이 프로그램의 지각된 가치에 영향을 미친다)은 심미적 경험과 오락적 경험이 유의한 것으로 나타났으며, 연구가설 2(북큐레이션 교육 프로그램의 경험에 대한 인식이 지속적 참여 의도에 영향을 미친다)는 교육적 경험을 제외한 다른 모든 요인이 유의미한 것으로 나타났다.

• Journal of Periodontal and Implant Science
• /
• 제53권2호
• /
• pp.99-109
• /
• 2023

Purpose: The aim of this systematic review was to evaluate the effectiveness of the socket shield technique (SST), an innovative surgical method introduced in 2010, for reducing buccal bone plate resorption. Methods: The review was conducted following the PRISMA guidelines. Clinical studies conducted in humans and investigating the SST were searched on PubMed (MEDLINE), Embase, Web of Knowledge, and Google Scholar in November and December 2021. The implant survival rate, percentage of complications, and clinical parameters (marginal bone loss [MBL], pink esthetic score [PES], and buccal bone plate resorption [BBPR]) were analyzed using the collected data. Results: The initial search resulted in 132 articles. After article screening, the full texts of 19 studies were read and 17 articles were finally included in the review. In total, 656 implants were installed with the SST. Nine of the 656 implants experienced failure, resulting in an implant survival rate of 98.6%. The percentage of complications was about 3.81%. The analysis of clinical parameters (MBL, PES, and BBPR), showed favorable results for the SST. The mean MBL in implants placed with the SST was 0.39±0.28 mm versus 1.00±0.55 mm in those placed without the SST. PES had a better outcome in the SST group, with an average of 12.08±1.18 versus 10.77±0.74. BBPR had more favorable results in implants placed with the SST (0.32±0.10 mm) than in implants placed with the standard technique (1.05±0.18 mm). Conclusions: The SST could be considered beneficial for preserving the buccal bone plate. However, since only 7 of the included studies were long-term randomized controlled trials comparing the SST with the standard implant placement technique, the conclusions drawn from this systematic review should be interpreted with caution.

• Restorative Dentistry and Endodontics
• /
• 제46권2호
• /
• pp.23.1-23.11
• /
• 2021

Objectives: This study assessed the reliability of digital color measurements using images of resin composite specimens captured with a cellphone. Materials and Methods: The reference color of cylindrical specimens built-up with the use of resin composite (shades A1, A2, A3, and A4) was measured with a portable spectrophotometer (CIELab). Images of the specimens were obtained individually or pairwise (compared shades in the same photograph) under standardized parameters. The color of the specimens was measured in the images using RGB system and converted to CIELab system using image processing software. Whiteness index (WI_D) and color differences (ΔE₀₀) were calculated for each color measurement method. For the cellphone, the ΔE₀₀ was calculated between the pairs of shades in separate images and in the same image. Data were analyzed using 2-way repeated-measures analysis of variance (α = 0.05). Linear regression models were used to predict the reference ΔE₀₀ values of those calculated using color measured in the images. Results: Images captured with the cellphone resulted in different WI_D values from the spectrophotometer only for shades A3 and A4. No difference to the reference ΔE₀₀ was observed when individual images were used. In general, a similar ranking of ΔE₀₀ among resin composite shades was observed for all methods. Stronger correlation coefficients with the reference ΔE₀₀ were observed using individual than pairwise images. Conclusions: This study showed that the use of cellphone images to measure the color difference seems to be a feasible alternative providing outcomes similar to those obtained with the spectrophotometer.

• Restorative Dentistry and Endodontics
• /
• 제47권2호
• /
• pp.15.1-15.18
• /
• 2022

This review aimed to characterize the effect of direct restorative material types and adhesive protocols on marginal adaptation and the bond strength of the interface between the material and the proximal dentin/cementum. An electronic search of 3 databases (the National Library of Medicine [MEDLINE/PubMed], Scopus, and ScienceDirect) was conducted. Studies were included if they evaluated marginal adaptation or bond strength tests for proximal restorations under the cementoenamel junction. Only 16 studies met the inclusion criteria and were included in this review. These studies presented a high degree of heterogeneity in terms of the materials used and the methodologies and evaluation criteria of each test; therefore, only a descriptive analysis could be conducted. The included studies were individually evaluated for the risk of bias following predetermined criteria. To summarize the results of the included studies, the type of restorative material affected the test results, whereas the use of different adhesive protocols had an insignificant effect on the results. It could be concluded that various categories of resin-based composites could be a suitable choice for clinicians to elevate proximal dentin/cementum margins, rather than the open sandwich technique with resin-modified glass ionomers. Despite challenges in bonding to proximal dentin/cementum margins, different adhesive protocols provided comparable outcomes.

• Journal of Korean Dental Science
• /
• 제16권2호
• /
• pp.192-203
• /
• 2023

Purpose: This study is to investigate the distribution of natural tooth shades in the Korean elderly population to quantify the correlation and changes of tooth color with age and gender. In addition, the possible effects of habits on tooth color were assessed. Materials and Methods: The tooth color of one of the maxillary central incisors of 200 Korean individuals aged 50 to 89 years, males and female, was measured using the portable intraoral spectrophotometer (VITA Easyshade V). CIELab and CIELCh color coordinates were recorded. We conducted the survey about the tobacco smoking, chronic disease, medication, eating habits, oral health behaviors and satisfaction with tooth color. Experimental data were statistically analyzed by using the t-test (P<0.05), two-way analysis of variance and Pearson's correlation test. Result: The most frequent color in the Korean elderly population was 3M3 & A3.5 shade. L^* and h^* values decreased, whereas C^*, a^* and b^* values increased progressively with age. There was a significant interaction between age and color coordinates for b^* values (r=0.245, P<0.05). Males generally have significantly higher C^*, a^*, b^* values and lower L^*, h^* value compared to females. Individuals who consumed alcohol had a higher L^* value (P<0.05). Conclusion: Within the limitation of this study, the central incisors were getting darker, more reddish, and yellowish with age. Information on the chromatic range of natural teeth by age and gender could help to select colors for esthetic dental restorations.

• 대한소아치과학회지
• /
• 제51권2호
• /
• pp.176-184
• /
• 2024

This study aimed to compare color matching between single-shade composite resin-restored teeth with various pulp capping materials and the dentin surrounding the restoration through instrumental analysis and visual evaluation of the color difference. Fifty maxillary right central incisor acrylic resin teeth were prepared with standardized Class III cavities on the proximal surfaces. These teeth were divided into five groups: restored with single-shade composite resin only; Ultra-Blend^TM plus followed by single-shade composite resin; TheraCal PT^TM followed by single-shade composite resin; Endocem^® MTA premixed followed by single-shade composite resin; and Well-root PT^TM followed by single-shade composite resin. The color difference (ΔE_ab^*) between the restored area and the center of the resin teeth was measured using a spectrophotometer. No significant color difference was observed in groups restored with only single-shade composite resin, Ultra-Blend^TM plus, and TheraCal PT^TM. The visual evaluation revealed that Ultra-Blend^TM plus exhibited the best color matching score, whereas the Endocem^® MTA premixed and Well-root PT^TM groups showed significantly lower color matching scores than the single-shade composite resin-only group. When opting for single-shade composite resin usage for anterior tooth restorations with the aim of reducing chair time, pulp capping materials Ultra-Blend^TM plus and TheraCal PT^TM provide esthetically pleasing results.

• 한국컴퓨터정보학회논문지
• /
• 제29권5호
• /
• pp.55-66
• /
• 2024

본 연구는 Pine & Gilmore의 체험경제이론을 바탕으로 선행연구에 근거하여 소비자에게 차별화된 가치를 제공하는 라이브 커머스의 체험요소(4Es)를 선정하고 체험요소, 몰입, 태도, 구매의도 간의 관계를 분석하였다. 라이브 커머스 이용자를 대상으로 온라인 설문조사를 진행하여 수집된 데이터를 바탕으로 연구모형의 가설을 검증하기 위해 Smart PLS 4.0을 활용한 경로분석을 실시하였다. 연구결과로는 첫째, 체험요소에 해당하는 오락적 체험, 심미적 체험, 교육적 체험, 현실도피적 체험은 몰입에 모두 유의한 영향을 미치는 것으로 나타났다. 둘째, 오락적 체험, 교육적 체험은 태도에 유의한 영향을 미치는 것으로 나타났으나, 심미적 체험과 현실도피적 체험은 태도에 유의한 영향을 미치지 못하는 것으로 나타났다. 셋째, 몰입은 태도와 구매의도에 유의한 영향을 미치는 것으로 나타났다. 넷째, 태도는 구매의도에 유의한 영향을 미치는 것으로 나타났다. 본 연구의 결과는 라이브 커머스의 체험요소에 대한 이해를 바탕으로 후속 연구 및 마케팅 전략을 위한 시사점을 제공할 것으로 기대된다.

• 대한치과보철학회지
• /
• 제51권4호
• /
• pp.332-338
• /
• 2013

성공적인 보철 치료를 위해서는 정확한 진단이 근거가 되어야 한다. 즉, 처음 환자가 내원하였을 때, 환자의 주소를 바탕으로 한 문제점을 찾고, 그 원인을 분석하여 이에 입각한 치료 계획을 세웠을 때, 만족스러운 결과를 기대할 수 있을 것이다. 본 증례의 환자는 77세 여성으로, 저작 시 상 하악 좌측 소구치 부위의 통증 및 기존 보철물의 비심미성을 주소로 내원하였다. 임상적, 방사선학적 검사 및 모형 분석을 통해 문제점을 파악하였고, 여러 문헌에 근거하여 지대치 평가, 보철물의 여러 가지 디자인에 따른 예후 및 최종 보철물의 장착 시 유지 관리의 용이성 등을 고려하여 치료 계획을 수립하기로 하였다. 심미적 문제, 보철을 위한 악간 공간의 부족을 해소하고자 최소한의 수직 고경 증가를 동반한 전악 수복을 시행하기로 결정하였다. 기능, 심미성 및 교합의 안정을 통한 환자의 적응도를 평가하여 치료 계획의 적절성 여부를 판단할 수 있었다. 따라서, 최종적인 고정성 국소 의치를 제작하고 장착하여 만족스러운 결과를 얻었기에 이를 보고하는 바이다.