• Maxillofacial Plastic and Reconstructive Surgery
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• 제34권6호
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• pp.440-448
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• 2012

Purpose: The purpose of this study was to evaluate marginal bone loss of the alveolar crest on implants with or without guided bone regeneration and variables that have influenced. Methods: The clinical evaluation were performed for survival rate and marginal bone loss of 161 endosseous implants installed with guided bone regeneration (GBR) in 83 patients from September 2009 to October 2010 in relation to sex and age of patients, position of implant, implant system, length and diameter of implant. Study group (n=42) implant with GBR procedure, control group (n=41) implant without GBR technique. Simultaneous GBR approach using resorbable membranes combined with autogenous bone graft or freeze-dried bone allograft or combination. Radiographic examinations were conducted at healing abutment connection and latest visit. Marginal bone level was measured. Results: Mean marginal bone loss was 0.73 mm in study group, 0.63 mm in control group. Implants in maxillary anterior area (1.21 mm) were statistically significant in study group (P<0.05), maxillary posterior area (0.81 mm) in control group (P<0.05). Mean marginal bone loss 1.47 mm for implants with diameter 3.4 mm, 0.83 mm for implants of control group with diameter 4.0 mm (P<0.05). Some graft materials showed an increased marginal bone loss but no statistically significant influence of sex, implant type or length. Conclusion: According to these findings, this study demonstrated the amount of marginal bone loss around implant has maintained a relative stable during follow-up periods. We conclude that implants with GBR had similar survival rate and crestal bone level compared with implants in native bone.

• 척추신경추나의학회지
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• 제9권1호
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• pp.1-14
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• 2014

Objective : The purpose of this study is to offer a new approach to diagnostic X-ray in perspective of Chuna manual medicine for clinical application. Methods : Characteristics of each malposition in X-ray were analyzed comprehensively, based on the listing system. By verifying these results, find out the methods of X-ray diagnosis according to the each malposition. Results : 1. Vertebral malposition can be explained by alignment and relative position of vertebral body in the X-ray. To obtain more accurate estimation of subluxation, features of other structures should be considered, such as spinous process, intervertebral foramen and disc space. 2. Pelvic malposition can be determined by relative location of anterior superior iliac spine (ASIS) and posterior superior iliac spine (PSIS) in the X-ray. Also other pelvic parameters should be utilized to make a diagnosis of sacral malposition. Conclusions : Diagnostic X-ray should be applied to many clinicians for reasonable Chuna manual medicine application. And further studies are needed to use the diagnostic X-ray in the perspective of Chuna manual medicine.

• 대한치과교정학회지
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• 제34권5호
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• pp.458-464
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• 2004

교정치료에 있어서 고정원의 조절은 매우 중요한 요소이며, 상악에서 특히 그러하다. 이를 얻기 위해 많은 노력을 해 왔으나 대부분이 환자의 협조에 대한 의존이 필수적이었기 때문에 고정원 보강에 대하여 확신할 수 없었다. 하지만 최근 skeletal anchorage를 이용하여 환자의 협조를 최소화하면서도 보다 효과적으로 고정원 보강을 할 수 있는 방법이 시행되고 있다. 또한 과거의 골 융합성 임프란트와 달리 미니 스크류는 구강 내의 어느 부위에나 식립할 수 있을 정도로 식립 부위의 제한성이 적다는 장점이 있다. 저자는 titanium miniscrew를 구개 정중부의 약간 측방에 식립하고, indirect active P.S.A.(Palatal skeletal anchorage)를 이용하여 치료한 결과 상악 구치부에서의 고정원 보강을 얻을 수가 있었다. 이 치료 결과로 보아 PSA는 상악 구치부의 고정원 보강 역할을 할 수 있을 것으로 생각되며. 또한 transpalatal arch system의 다양한 design을 응용한다면 효율적인 치아 이동을 하는데 많은 도움이 될 것으로 생각된다.

• 대한치과교정학회지
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• 제41권5호
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• pp.361-370
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• 2011

Objective: Speedy surgical orthodontics (SSO), an innovative orthodontic treatment, involves the application of orthopedic forces against temporary skeletal anchorage devices following perisegmental corticotomy to induce movement of specific dental segments. Herein, we report the biological effects of SSO on the teeth and periodontal structures. Methods: Five beagle dogs were divided into 2 groups and their 6 maxillary incisors were retracted $en$ $masse$ by applying 500 g orthopedic force against a single palatal mini-plate. Retraction was performed without and with perisegmental corticotomy in groups I and II, respectively. All animals were killed on the 70th day, and their periodontal structures were processed for histologic analyses and scanning electronic microscopy (SEM). The linear distance between the third maxillary incisor and canine was used as a benchmark to quantify the retraction amount. Results: Retraction was markedly faster and retraction amount greater in group II than in Group I. Surprisingly, Group II did not show any root resorption despite extensive retraction, while Group I showed prominent root surface irregularities. Similarly, SEM showed multiple resorption lacunae in Group I, but not in Group II. Conclusions: SSO is an effective and favorable orthodontic approach for major en masse retraction of the maxillary anterior teeth.

• 구강회복응용과학지
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• 제28권4호
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• pp.407-421
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• 2012

악악면 부위의 교정적 문제는 크게 골격적인 문제와 치성적 문제로 나룰 수 있다. 치성적 문제로 인해서 많은 교합의 부조화가 발생하는데 이중 치아의 결손 또는 치아의 맹출 실패는 기능적 문제뿐만이 아니라 심미적 문제도 같이 유발한다. 또한 추가적으로 발생하는 심리적인 문제도 환자를 내원하게 만드는 중요한 이유이다. 상악골에 다수의 치아가 맹출 하지 못하는 경우에는 교합적, 심미적 문제 뿐만 아니라 치조골의 유지 또한 어렵게 하는 문제가 발생한다. 따라서 다수치의 맹출에 문제가 있는 경우에는 보다 단계적 접근이 필요하다. 본 증례의 환자는 #13, 12, 11, 23, 43이 맹출하지 못하는 문제를 주소로 내원하였으며, 상악 치아들을 맹출하게 하기위한 외과적 노출술 및 단계별 교정적 정출을 통하여 완벽한 교합을 이룰 수 있었다. 또한 추가적인 치주 처치를 통하여 치아맹출시 발생한 치은 퇴축을 제거하였다. 우측 매복 하악 견치는 자연스러운 악궁 확장과 leeway space를 이용하여 특별한 외과적 처치 없이 성공적으로 이루어졌다.

• Clinics in Shoulder and Elbow
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• 제12권2호
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• pp.221-225
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• 2009

목적: 저자들은 견갑하 건 단독 파열에 대한 쇄골하 삽입구를 이용함으로써 봉합나사못을 보다 적절한 각도로 삽입하고 충분한 작업공간을 확보하여 봉합갈고리를 이용한 건 봉합을 용이하게 할 수 있었다. 대상 및 방법: 기존의 방법은 일반적으로 전방 및 전외측 삽입구를 이용하여 견갑하 건의 견인과 부착부 족문 (footprint)의 변연절제술을 시행한 후 봉합나사못을 삽입하여 복원술을 시행하고 있으며, 저자들은 삽입관을 따로 위치시키지 않고 쇄골하 삽입구를 이용하여 피하 (subcutaneous)로 봉합나사못 삽입과 봉합고리를 이용한 봉합사 통과작업을 시행하고, 전방 삽입구에만 삽입관을 위치시켜 봉합사를 결찰하여 견갑하 건 복원술을 시행하였다. 결과 및 결론: 이 술식은 간단하며 견갑하 건의 부분 파열이나 퇴축이 많이 되지 않은 전 파열에 용이하게 사용될 수 있을 것으로 생각된다.

• Journal of Gynecologic Oncology
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• 제29권6호
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• pp.87.1-87.4
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• 2018

Objective: Upper paraaortic lymph node dissection (UPALD) to the infrarenal level is one of the most challenging robotic procedures. Because robotic system has the limitation in robotic arm mobility. This surgical video introduces a novel robotic approach, lower pelvic port placement (LP3), to perform optimally and simultaneously both UPALD and pelvic procedures in gynecologic cancer patients using da Vinci Xi system. Methods: The patient presented with high-grade endometrial cancer. She underwent robotic surgical staging operation. For the setup of the LP3, a line was drown between both anterior superior iliac spines. At 3 cm below this line, another line was drown and four robotic ports were placed on this line. Results: After paraaortic lymph node dissection (PALD) was completed, the boom of robotic system was rotated $180^{\circ}$ to retarget for the pelvic lateral displacement. Robotic ports were placed and docked again. The operation was completed robotically without any complication. Conclusion: The LP3 was feasible for performing simultaneously optimal PALD as well as procedures in pelvic cavity in gynecologic cancer patients. The advantage of LP3 technique is the robotic port placement that affords for multi-quadrant surgery, abdominal and pelvic dissection. The LP3 is facilitated by utilizing advanced technology of Xi system, including the patient clearance function, the rotating boom, and 'port hopping' that allows using every ports for a camera. The LP3 will enable surgeons to extend the surgical indication of robotic surgical system in the gynecologic oncologic field.

• Archives of Plastic Surgery
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• 제49권2호
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• pp.166-173
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• 2022

The introduction of acellular dermal matrix (ADM) to breast reconstruction has allowed surgeons to reexplore the prepectoral implant placement technique in postmastectomy breast reconstruction. Our institution adopted a novel approach using meshed ADM to lessen the financial burden of increased ADM utilization with the prepectoral breast reconstruction. This is a retrospective, single-center review of two-stage prepectoral breast reconstruction using meshed human-derived ADM for anterior prosthesis coverage. Patient demographics, oncologic data, perioperative characteristics, and complications were examined and reported as means with standard deviations. Cost-saving with the meshed technique was evaluated. Forty-eight patients (72 breasts) with a mean age of 48.5 ± 15.0 years (range 26-70 years) were included in the study. The mean follow-up time was 13.2 ± 4.4 months (range 4.1-25.8 months). Nineteen breasts (24.6%) experienced complications, with seromas being the most common complication (12.5%, n = 9). Expander removal and reoperation occurred at a rate of 8.3 and 9.7%, respectively. The average time to drain removal was 18.8 ± 6.6 days (range 8-32 days). Meshed ADM provided an average cost savings of $6,601 for unilateral and $13,202 for bilateral reconstructions. Our study found that human-derived meshed ADM can be safely used in two-staged prepectoral tissue expander-based breast reconstruction and can result in significant cost savings.

• 대한치과보철학회지
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• 제61권1호
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• pp.73-81
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• 2023

완전 무치악 환자에서 상악은 전통적인 총의치 치료를 통해 충분한 안정, 지지 및 유지를 얻기 용이하지만, 하악은 해부학적 한계로 인하여 치료에 어려움이 있기 때문에 임플란트를 동반한 치료를 고려할 수 있다. 구치부에 임플란트 식립이 어려운 경우에는 이공 전방에 4 - 5개의 임플란트를 이용하여 하악의 의치를 고정해주는 하이브리드 형 고정성 총의치로 치료할 수 있고, 구치부에 임플란트 식립이 가능한 경우라면 다수 유닛으로 구성되는 임플란트 지지 고정성 보철물을 고려할 수 있다. 이러한 접근방식은 시대가 지남에 따라 수술방식이나 사용하는 재료 등이 다양하게 변해왔다. 본 증례에서는 상악 총의치를 사용하는 완전 무치악 환자의 하악에서 임플란트를 이용한 고정성 보철 치료의 증례를 중심으로 치료 방법을 비교해 보고자 한다.

• Journal of Korean Neurosurgical Society
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• 제66권1호
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• pp.53-62
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• 2023

Objective : Deep learning is a machine learning approach based on artificial neural network training, and object detection algorithm using deep learning is used as the most powerful tool in image analysis. We analyzed and evaluated the diagnostic performance of a deep learning algorithm to identify skull fractures in plain radiographic images and investigated its clinical applicability. Methods : A total of 2026 plain radiographic images of the skull (fracture, 991; normal, 1035) were obtained from 741 patients. The RetinaNet architecture was used as a deep learning model. Precision, recall, and average precision were measured to evaluate the deep learning algorithm's diagnostic performance. Results : In ResNet-152, the average precision for intersection over union (IOU) 0.1, 0.3, and 0.5, were 0.7240, 0.6698, and 0.3687, respectively. When the intersection over union (IOU) and confidence threshold were 0.1, the precision was 0.7292, and the recall was 0.7650. When the IOU threshold was 0.1, and the confidence threshold was 0.6, the true and false rates were 82.9% and 17.1%, respectively. There were significant differences in the true/false and false-positive/false-negative ratios between the anterior-posterior, towne, and both lateral views (p=0.032 and p=0.003). Objects detected in false positives had vascular grooves and suture lines. In false negatives, the detection performance of the diastatic fractures, fractures crossing the suture line, and fractures around the vascular grooves and orbit was poor. Conclusion : The object detection algorithm applied with deep learning is expected to be a valuable tool in diagnosing skull fractures.