솔레노이드 인젝터와 피에조 인젝터의 파형과 분사량 분석을 위한 실험적 연구

강성구,김철수 한국기계기술학회 2020 한국기계기술학회지 Vol.22 No.1

In this paper, we investigate the relationship between control system of Bosch system and that of Delphi system by measuring the high and low voltage waveform, current waveform and fuel injection quantity of D-2 and R- engines. Waveform measurements are used the PICO scope and the CDS tester. The injectors of D-2 and R-engines were tested under no load condition using injector with normal fuel injection quantity, injector with small fuel injection quantity and injector with many fuel injection quantity. The relation between current energy and fuel injection quantity shows that the injector variation rate of D2-engine is much larger than that of R-engine. The injector current energy of the D2-engine was more linear than that of the R-engine, therefore making the system more stable. Although the control system of the D2-engine is a more stable system only in terms of the durability of the internal parts of the injector, the injector of the R-engine has a good response because the current value is large.

구순열 환자의 비 성형술

민승기,이의석,이동근 大韓顎顔面成形再建外科學會 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.1

초음파 지방흡입술과 유선 및 피부 절제술을 이용한 부유방 수술

윤상엽,강민구 대한미용성형외과학회 2009 Archives of Aesthetic Plastic Surgery Vol.15 No.2

One Stage Surgical Treatment of the Tuberous Breast: Augmentation ombined with an Unfurling Procedure

Beatrix Munder,Katrin Seidenstucker,Stefan Langer,Philipp Richrath,Christoph Andree 대한미용성형외과학회 2009 Archives of Aesthetic Plastic Surgery Vol.15 No.2

For the patients-especially for the young women - the congenital deformity of the breast is a problem for the psychosocial development in the adolescence. Many operative procedures for correction of tuberous breast have been described in recent years. Most of these methods however fail to address the issue of the contracting ring with unstable results. Our surgical technique for the correction of tuberous breast deformities is a single stage approach with a combination of an augmentation with anatomical silicone implant for the hypoplasia of the gland. A form correction of the breast glandular tissue by an unfurling procedure is done to correct the constricting ring that herniates into the nipple-areola complex. We describe our surgical technique with suggestions for achieving optimal results. Our combined treatment is based on the fact that the existing breast hypoplasia treated with a silicone implant would not correct the deformity of the breast gland. Therefore, the simultaneous correction of the constricted breast gland is performed and gives patients a longlasting stable result in one single procedure.

삼엽형 선천성 이개열의 새로운 교정법

서병철,전영준,김영진 대한미용성형외과학회 2009 Archives of Aesthetic Plastic Surgery Vol.15 No.2

보툴리눔독소 A를 이용한 잇몸 웃음 교정 시 올바른 주사 위치에 대한 연구

김영진,전영준,배준성 대한미용성형외과학회 2006 Archives of Aesthetic Plastic Surgery Vol.12 No.2

Gummy smile refers to the excessive exposure of the upper gum when a one smiles, more than 2-3 mm, accompanying the elevation of upper lip. Recently, it is of an increasing concern that the injection of botulinum toxin A to levator labii superioris alaeque nasi muscle and levator labii superioris muscle which are major lip-elevating muscles, has the corrective effect by weakening of these muscles. It is important to understand anatomical marker of the targeted muscle to which safe and effective injection can be performed. This study was performed to investigate the marker to find the targeted muscle easily applicable in practice by reviewing previous literatures. From January 2004 to May 2005, on 5 females that have a gummy smile, we marked injection points to the target muscle, and confirmed their effectivity, accuracy, and safety by EMG. Then we injected botulinum toxin A, and investigate amount of the gum exposure when smiles and occurrence of the side effect serially. 4 weeks after injection, we observed satisfied result without any side effects. Conclusively, as injection points of botulinum toxin A which we presented, are comparatively correct by anatomy, they are easily applicable in practice.

안면부 파라핀 종양의 부분제거 후 진피지방이식 및 얼굴당김술을 이용한 동시 재건술

이윤호,이상우 대한미용성형외과학회 2006 Archives of Aesthetic Plastic Surgery Vol.12 No.1

Paraffin injection for aesthetic purpose by unauthorized people has many problems. One of the most common complication is the paraffinoma. Because of problems after paraffinoma removal, such as flap necrosis and facial nerve injury, the treatment of the choice is only partial removal. But there can be some depression and sagging of the cheek left after paraffinoma removal. So we have treated 8 patients who have suffered from paraffinoma in forehead and cheek by partial removal of paraffinoma and correction of the depression and the sagging of the cheek with dermofat graft and face lift. Through the extended preauricular incision, after skin flap elevation we removed paraffinoma as much as possible. Dermofat graft from the gluteal area was performed at paraffinoma removed site. And we prevented the sagging of the cheek skin by the suspension pull through suture. The follow up period was from 2 to 26 months(mean, 12 months). All the patients were satisfied with the reduction of the paraffinoma and they did not complain any deformity. One patient had flap necrosis on nasal dorsum and postauricular area, but they healed with dressing only in two weeks. We concluded that one-stage reconstruction with dermofat graft and face lift after partial removal of paraffinoma is reliable method in treating of paraffinoma in forehead and cheek.

피부 밑 진피파판법과 관통봉합 및 쌈지봉합을 이용한 심한 함몰유두 교정

윤상엽,강민구 대한미용성형외과학회 2009 Archives of Aesthetic Plastic Surgery Vol.15 No.2

Efficacy of artificial intelligence-based skin analysis for calculating wrinkle improvement and skin firmness after simultaneous radiofrequency and high-intensity focused ultrasound therapy: a retrospective clinical study

Woohyuk Yoon,신혜경 대한미용성형외과학회 2025 Archives of Aesthetic Plastic Surgery Vol.31 No.2

Background Quantitative skin assessments have transitioned from subjective evalua tions to objective approaches. However, clinical application has remained limited due to high costs and reliance on specialized equipment. High-intensity focused ultrasound and radiofrequency are the two most widely used noninvasive modalities for skin tight ening and wrinkle improvement. This study investigated investigate the efficacy of arti ficial intelligence (AI)-based skin analysis as a more accessible and cost-effective tool for assessing skin firmness and wrinkle improvement. Methods A retrospective analysis was conducted on 34 patients treated simultaneous ly with high-intensity focused ultrasound and bipolar radiofrequency between January and February 2025. AI-based skin assessments, evaluating firmness and wrinkle scores, were obtained pre-treatment, immediately post-treatment, and at a 2-month follow up. Standardized clinical photographs were independently evaluated by two blinded human raters. Logistic regression and correlation analyses were conducted to deter mine alignment between AI and human evaluations. Results AI analysis showed significant improvements in both firmness and wrinkle scores immediately after treatment and at the 2-month follow-up (P<0.05). Human evaluations demonstrated high inter-rater agreement (Cohen’s κ=0.72–0.91). Logistic regression analyses indicated that changes in AI scores significantly predicted human rated treatment effectiveness at both time points (area under the curve [AUC] for firmness=0.86; AUC for wrinkles=0.73–0.93). Spearman correlation coefficients and the Mann-Whitney U test further supported strong alignment between AI and human assessments. Conclusions This study validates the clinical utility of AI-based skin analysis as a reliable quantitative measure for evaluating wrinkle improvement and skin tightening follow ing energy-based rejuvenation treatments. Its predictive validity aligns well with expert human judgment, particularly at delayed follow-up.

외상에 의한 상안검 변형의 교정

이근철,권용석,김석권,김민수,차병훈 대한미용성형외과학회 2007 Archives of Aesthetic Plastic Surgery Vol.13 No.1

The most common type of emergency treatment in the field of plastic and reconstructive surgery is for facial soft tissue injuries. Especially upper lid injury cases can easily be treated by primary closure. However, primary closure of lid results vary from just scar formation to loss of double fold and ptosis. Having successfully performed correction of the traumatic upper lid deformity by various methods with satisfactory results, we now report these results. We performed correction on 24 patients, who visited our hospital primarily because of traumatic upper lid deformity. They had diverse main symptoms, including the loss of double fold, asymmetric eyelid, ectropion and ptosis after trauma. The surgical method was removal of previous scar tissues to prevent deformity by adhesion, followed by complete release of adhesive tissues around aponeurosis. If there was ptosis or loss of double fold, we fixed the cut levator aponeurosis to the tarsal plate, or fixed the posterior surface of the orbital septum or levator aponeurosis to the dermal plane of the lower line of skin incision or superior tarsal border. In cases of ectropion or lagophthalmos, adhesive scars were sufficiently detached from levator aponeurosis to enable eye closure. All patients showed improvement of previous deformities and there was no relapse or any newly developed deformities by adhesive scars. As traumatic upper lid noticeable deformities usually have excessive adhesion of scars and distortion of normal anatomical structures, preoperative evaluation with careful and accurate techniques suitable for each cause, are thought to be essential for obtaining good results.