• 대한치과기공학회지
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• 제2권1호
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• pp.35-38
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• 1980

이 기술은 레진(acrylic resin) 또는 의과용 도재(dental porcelain)에 의한 치아 색깔의 전장부위를 갖고 있는 금속구치 block(metal posterior tooth block)의 개조에 대한 기술의 일면이다. 이 기술은 모든 가철식 보철물(removable dental restoration)에 적용할 수 있으며 특히 자연치열(natural dentition) 대합치에 가철식 국부의치(removable partial denture)를 갖고 있는 만성 이갈음 환자(chronic bruxing patient)에 적용할 수 있다.

• 분석과학
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• 제32권1호
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• pp.7-16
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• 2019

본 연구에서는 닥나무 인피섬유와 이를 이용하여 제조한 한지의 FT-NIR및 FT-MIR 스펙트럼 데이터를 각각PLS-DA에 적용하여 닥나무 인피섬유 및 한지의 원산지 판별 모델을 개발하고자 하였다. 본 연구를 위하여 서로 다른 원산지의 국내산 닥나무 인피섬유 10점을 채취하여 한지로 제조하였다. 상기시료의 FT-NIR 및 FT-IR 스펙트럼 데이터는 데이터 전처리 과정을 거쳐 PLS-DA를 수행하였다. 모델링 결과, 닥나무 인피섬유와 한지의 NIR 스펙트럼 데이터가 판별모델의 교차 검증결과 및 성능평가(정확도, 민감도, 특이도)에서 모두 100 %로 MIR 스펙트럼 데이터보다 우수한 판별 성능을 나타냈다. 또한 지역별로 4 개의 그룹을 형성하는 것을 확인 할 수 있었으며, 닥나무 인피섬유와 한지의 원산지 판별 모델 간 score 형태가 유사하게 나타내는 것을 확인하였다.

• 대한치과보철학회지
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• 제55권3호
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• pp.325-330
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• 2017

단일 치아 상실 시 전부피개관을 유지장치로 사용하는 고정성 보철이나 임플란트를 이용한 치료가 우선적으로 선택되어 사용되고 있다. 하지만 전부 피개관 지대치 형성을 위해서는 건전한 치질을 많이 삭제해야 한다는 단점이 있다. 임플란트의 경우 인접 치아의 손상을 피할 수 있으나 환자의 구강 상태와 전신 상태에 따라 불가능하거나 일정기간 연기해야 하는 경우도 있다. 본 증례에서는 최소한의 치질 삭제로 젊은 환자와 치은 퇴축이 있는 환자의 단일 치아 상실을 수복하기 위해 레진 접착 고정성 보철물을 선택하였다. 모든 환자들이 심미적, 기능적으로 만족하였기에 이를 보고하는 바이다.

• 대한치과기공학회지
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• 제35권1호
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• pp.49-56
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• 2013

Purpose: The deformation characteristics induced by non-destructive stresses using piezoelectric transducer(PZT) were analyzed for 3-unit fixed partial dentures manufactured PFM, Everest(CAD/CAM) and Zirkonzahn(copy milling, MAD/MAM) by electron speckle pattern interferometery(ESPI). Methods: The ESPI analysis after loading the restoration with PZT by applying electric voltage of 900mV at the points of 10 mm above the base of the prostheses. Results: PFM and All-Ceramic Everest prostheses showed about 0.1 ${\mu}m$ while that of All- Ceramic Zirkonzahn prostheses showed 0.085 ${\mu}m$, demonstrating that Zirkonzahn displaced less. For PFM and All-Ceramic Zirkonzahn prostheses, the displacements were large at just below the loading point, while generalize displacement was shown over the loading point and weak connector areas for All-Ceramic Everest prostheses. Conclusion: We could find that the deformation characteristics induced by non-destructive stresses using PZT analyzed by ESPI were similar to the fracture strengths evaluated using universal testing machine.

• Archives of Plastic Surgery
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• 제38권3호
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• pp.235-240
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• 2011

Purpose: Management of pressure sores has been improved, along with development of musculocutaneous flaps and perforator flaps. Nowadays, the treatment of pressure sore with perforator flaps has shown several advantages, including minimal donor site morbidity, relatively versatile flap design not only in primary cases but also in recurred cases and minimized anatomical rearrangement of regional muscle position. In this study, we report our clinical experience of gluteal perforator flap used in the treatment of a greater trochanteric pressure sore. Methods: A clinical study was performed on 7 patients who underwent total 10 operations. 1 superior gluteal artery perforator flap and 9 inferior gluteal artery perforator flaps were used to reconstruct the defect, followed by the mean observation duration of 22 months. Results: There were no total flap loss. We treated 2 cases of partial flap loss with debridement and primary repair. 2 recurred cases were successfully treated using the same method. Donor sites were all primarily repaired. Conclusion: The gluteal perforator flap could be considered as a safe and favorable alternative in the treatment of soft tissue defects in the greater trochanteric area. The advantages of the flap include low donor site morbidity and the possibility of versatile flap design not only in primary cases but also in recurred cases.

• Clinics in Shoulder and Elbow
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• 제23권2호
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• pp.80-85
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• 2020

Background: Atelocollagen has been studied for restoration of rotator cuff tendon. In this study, we attempted to evaluate the clinical outcome of ultrasound-guided atelocollagen injection in an outpatient clinic for patients with partial rotator cuff tear. Methods: We recruited 42 outpatients who visited our hospital from May 2019 to September 2019. Atelocollagen injection was performed in patients with partial rotator cuff tear diagnosed by magnetic resonance imaging and ultrasound. American Shoulder and Elbow Surgeons (ASES), Constant, Korean Shoulder Score (KSS) and Simple Shoulder Test (SST) scores, and range of motion were assessed before injection and after 2 months. Statistically, we analyzed the clinical results using the Wilcoxon signed-rank test. Results: Finally, 15 patients were enrolled for analysis. There was no significant difference between pre- and post-injection in terms of range of motion, ASES (57.0 vs. 60.4), Constant (56.4 vs. 58.9), KSS (64.6 vs. 68.5), and pain-visual analog scale (4.2 vs. 3.7), except function-visual analog scale (F-VAS; 6.3 vs. 7.1) and SST (6.6 vs. 6.9). A significant difference was found in SST (P=0.046) and F-VAS (P=0.009). According to the ultrasound results at 2 months, we found hyperechoic materials in three of seven patients. The most common complication of atelocollagen injection was post-injection pain (53%, 8/15). Conclusions: Ultrasound-guided atelocollagen injection for partial rotator cuff tear showed no significant change in terms of clinical outcomes, except for F-vas and SST score. Tendon regeneration was not clear due to the remnants of atelocollagen present at 2-month follow-up ultrasound. There seems to be alarming post-injection pain for 2 to 3 days in the patients who received atelocollagen injection in an outpatient clinic.

• 대한치과보철학회지
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• 제60권2호
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• pp.211-221
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• 2022

완전 무치악 악궁을 수복함에 있어 해부학적인 한계 또는 경제적인 제한이 있거나 환자가 광범위한 수술을 원하지 않을 경우에 임플란트 식립이 제한될 수 있다. 이러한 경우 전악 임플란트 고정성 보철물의 대안으로 임플란트 보조 국소의치를 이용할 수 있다. 본 증례는 치주질환으로 다수 치아를 발거하여 상악 완전 무치악과 하악 부분 무치악이 된 56세 여성 환자에서 상악 전방부에 4개의 임플란트를 식립하여 8본 서베이드 보철물과 임플란트 보조 국소의치로 수복하였고, 하악은 전치부 8본 고정성 가공 의치 및 구치부 임플란트 고정성 보철물로 수복하였다. 9년 간의 경과 관찰 시 심미적, 기능적으로 적절한 결과를 얻었기에 이를 보고하고자 한다.

• 대한치과보철학회지
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• 제61권2호
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• pp.135-142
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• 2023

일명 '메릴랜드 브릿지'로 불리는 Resin-bonded fixed partial denture (RBFPD)는 전치부 결손부위를 수복하는데 있어 침습범위를 최소화하는 보존적 보철치료로 잘 정립되어 있다. 하지만 RBFPD의 여러 이점에도 불구하고 높은 탈락률, 비심미성, 지지체 파절 등으로 인해 보편적인 치료방법으로 선택되지는 못하였다. 최근 치과 재료의 발달과 함께 지르코니아가 RBFPD의 새로운 재료로 도입되면서 강도와 심미성이 개선된 전치부 RBFPD의 적용에 적합한 재료로 평가받고 있다. 본 증례는 상악 좌측 측절치를 상실한 환자에서 지르코니아 RBFPD를 수복한 증례로, 전치부에서 비침습적이며 심미적인 보철물을 이용하여 치아상실부위를 수복하였고, 환자와 술자 모두 만족하는 결과를 얻었기에 본 증례를 보고하는 바이다.

• Archives of Plastic Surgery
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• 제43권5호
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• pp.438-445
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• 2016

Background The goal of reconstruction is to provide coverage of exposed vital structures with well-vascularized tissue for optimal restoration of form and function. Here, we present our clinical experience with the use of the scapular fascial free flap to correct facial asymmetry and to reconstruct soft tissue defects of the extremities. Methods We used a scapular fascial free flap in 12 cases for soft tissue coverage of the extremities or facial soft tissue augmentation. Results The flaps ranged in size from $3{\times}12$ to $13{\times}23$ cm. No cases of total loss of the flap occurred. Partial loss of the flap occurred in 1 patient, who was treated with a turnover flap using the adjacent scapular fascial flap and a skin graft. Partial loss of the skin graft occurred in 4 patients due to infection or hematoma beneath the graft, and these patients underwent another skin graft. Four cases of seroma at the donor site occurred, and these cases were treated with conservative management or capsulectomy and quilting sutures. Conclusions The scapular fascial free flap has many advantages, including a durable surface for restoration of form and contours, a large size with a constant pedicle, adequate surface for tendon gliding, and minimal donor-site scarring. We conclude that despite the occurrence of a small number of complications, the scapular fascial free flap should be considered to be a viable option for soft tissue coverage of the extremities and facial soft tissue augmentation.

• 대한치과보철학회지
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• 제33권2호
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• pp.241-268
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• 1995

Splint therapy, the immobilization of teeth, has been done for patient's masticatory comforts and an adjunctive aid in periodontal therapy. Mandibular premolars are frequently splinted in many distal extension removable partial denture cases. But splinting is an extensive restoration that may not be conservative of tooth structure and may prove to be quite costly to the patient. The two dimensional finite element analysis method was used to determine the magnitude and mode of distribution of the stresses of the periodontal ligament and supporting alveolar bone when abutments with different periodontal supports were splinted and distal-extension removable partial denture was subjected to different loading schemes. The results were as follows : 1. When abutments were splinted, stresses moved from apico-distal to apico-mesial of terminal abutment on a vertical force and from disto-alveolar crest to apex on a distally directed force. But stresses were generally diminished on a mesially directed force. 2. As vertical bone loss was proceeding, most of stresses were transmitted to residual ridge and the rest of stresses were concentrated on apex of distal abutment. But these apical stresses were minimized when abutments were splinted. 3. As mesially inclined bone loss was proceeding, it seemed to be dangerous that many stresses were concentrated on the distal alveolar crest, especially in the distally directed load case. Abutments splinting decreased the alveolar crestal stresses but not enough. 4. For all vertical stresses were effectively decreased on splinting, stresses were concentrated as highly on apico-mesial area of distal abutment in distally directed load cases as the distal inclination of bone level was severe. 5. The directions and magnitudes of abutment movements were decreased with teeth splinting.