• Advances in pediatric surgery
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• 제7권1호
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• pp.1-6
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• 2001

The aims of this study were to evaluate the prognostic predictabilities of the risk classifications (Waterston, Montreal, and Spitz), preoperative treatment of pneumonia and the length of esophageal gap in esophageal atresia. Twenty-five cases of esophageal atresia were reviewed retrospectively. The data was analyzed with Likelihood ratio test for trend and Fisher's exact test. Survival rates were 100.0 % in group A and B, and 60.0 % in group C according to Waters ton classification (p=0.027). By Montreal classification, 95.7 % in group I and 50.0 % in group II (p=0.086). By Spitz classification, 95.5 % in group I and 66.7% in group II (p=0.159). The survival rate was 85.7 % in the patients with pneumonia preoperatively treated and 94.4% in the patients without pneumonia. The difference was not significant (p=0.490). Survival rate in the patients with long gap (${\geq}$3cm) was 50.0 % and 100.0 % in patients with short gap (<3cm) with significant difference (p=0.020). The Waterston classification could be modified into two groups because the prognosis of both group A and B were the same. Preoperative pneumonia does not seem to be a risk factor. The length of the esophageal gap showed prognostic value.

• 대한두경부종양학회지
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• 제14권1호
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• pp.81-87
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• 1998

Fine needle aspiration cytology was used widely to select thyroid nodules for surgery. The result could be highly reliable for most malignancies and for benign nodules. The purpose of this study was to determine the value of frozen biopsy by directly comparing the results of preoperative fine needle aspiration cytology to frozen biopsy examination. In our university hospital, 103 patients with thyroid nodule were operated during the years 1996 through 1997. A comparison of accuracy of the fine needle aspiration cytology with frozen biopsy was made for 85 patients who underwent both procedures. The 85 patients were separated into two groups. The group I included 65 patients, whose preoperative fine needle aspiration cytology results were reported as benign or malignant lesion definitely. The group II included 85 patients, the patients whose reported fine needle aspiration cytologic result was suspicious for malignancy were regarded .as malignant lesion and results for follicular neoplasm were regarded as benign lesion. The accuracy of both procedures was compared on two group also. The sensitivity, specificity, and accuracy of frozen biopsy were 76.7%, 93.5%, and 85.2% in group I and 75.6%, 95.5%, and 85.9% in group II, respectively, compared with 63.3%, 87.1%, and 75.4% in group I and 65.4%, 81.8%, and 72.9% in group II for fine needle aspiration cytology. On benign lesion, the accuracy was 95.5% in frozen biopsy and 68.2% in fine needle aspiration cytology, 75.6% in frozen biopsy and 53.7% in fine needle aspiration cytology on malignant lesion. We conclude that although fine needle aspiration cytology is the reliable diagnostic test in the evaluation of thyroid nodule, frozen biopsy should be performed intraoperatively, because fine needle aspiration cytology is insufficiently sensitive for reliable surgical planning.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제20권4호
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• pp.300-304
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• 1998

Moderns have desire likely to be further good-looking concomitant with a qualitative advancement of the life. With one of this phenomenon, an orthognathic surgery performing at the dept. of oral and maxillofacial surgery have been becoming a more extensively. It's possible to occur many complications during the operations and especially, an excessive bleeding of those may be fatal and so a transfusion is performing for the prevention &management of that. But, because of the rate of increase of an blood-born infection like AIDS via transfusion, nowadays an autologous blood transfusion is interesting to us. We made a comparative study of an amount of blood loss &transfusion using hemoglobin value after classifying the orthognathic surgeries from Feb. '97 to Mar. '98 in single-jaw and doublejaw surgery. And we intended to set a standard against of a routine preoperative cross-matching deciding the amount of predictive homologous blood transfusion according to operative method. Simultaneously, we studied the realization &effectiveness of autologous blood transfusion with some cases, so would like to present. Results: 1. Single-jaw operation can be performed without blood transfusion or with homologous blood transfusion through only blood typing & screening. 2. We commonly transfuse two units of blood with double-jaw operation and an autologous blood transfusion has much more advantage than an homologous blood transfusion. 3. We can reduce charge associated with blood transfusion through precisely preoperative evaluation of patients and proper type of blood transfusion.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제37권1호
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• pp.43-48
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• 2011

Introduction: This study examined the anatomical morphology of the medial surface of the posterior mandible using 3-dimensional cone-beam computed tomography (CT) images to reduce the number of complications related to dental implant placement. Materials and Methods: Fifty patients were enrolled in this study with an average age (${\pm}$standard deviation) of 44.28 (${\pm}13.05$). On the coronal views cone-beam CT of the first molars, the distance between the top of the canal and alveolar crest vertical distance (VD), the distance between the upper-most point of the canal and the point perpendicular to the lingual cortical margin of the mandible lingual distance (LD), the location of the starting point of VD for reducing from the vertical reference line (VD point), and the inclination of the mandibular medial surface (lingual inclination) were measured, and a statistical evaluation was performed using SPSS for Windows version 15.0. Results: The mean VD0 was $16.91{\pm}2.47\;mm$ and VDx decreased with increasing x value. The mean LD was $5.27{\pm}1.36\;mm$. The VD began to decrease at the mean location of $6.12{\pm}0.96\;mm$ from the vertical reference line. The mean lingual inclination was $1.52{\pm}0.72^{\circ}$. Conclusion: These results will assist in the accurate placement of dental implants and the reduction of complications, particularly in the case of preoperative implant planning using only 2-dimensional imaging methods. (ex. panoramic radiography)

• 대한족부족관절학회지
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• 제7권1호
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• pp.21-29
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• 2003

Purpose: The purpose of this study is to review clinical and radiologic changes after arthroscopic operation without bone graft for osteochondral lesion with subchondral cyst on the talus. And we compared the results with those without cyst. Radiologic changes were also observed. Materials and Methods: Arthroscopic microfrature or abrasion arthroplasty was performed on 10 caeses of osteochondral lesions with subchondral cyst and 20 cases without cysts. Preoperative and postoperative symptoms were evaluated by Ankle-Hind foot scale of AOFAS and the score of two groups were compared(t-Test : Paired Two Test for Means). Radiologic evaluation was performed after operation on patients with osteochondral lesion with cyst. Results: On patients of osteochondral lesion with subchondral cyst on talus, there was clinical improvement compared to the preoperative status and compared to patients without cysts(P=0.01) after arthroscopic operation. We could get increase of density and decrease of size of cystic lesion on plain film with time passage. Conclusion: We report 10 cases with osteochondral lesion with subchondral cyst on talus which resulted in clinical and radiological improvement after arthroscopic microfracture or abrasion arthroplasty without bone graft.

• Archives of Plastic Surgery
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• 제44권1호
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• pp.19-25
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• 2017

Background Numerous condylar repositioning methods have been reported. However, most of them are 2-dimensional or are complex procedures that require a longer operation time and a highly trained surgeon. This study aims to introduce a new technique using a condylar repositioning plate and a centric relation splint to achieve a centric relationship. Methods We evaluated 387 patients who had undergone surgery for skeletal jaw deformities. During the operation, a centric relation splint, intermediate splint, final centric occlusion splint, and condylar repositioning plate along with an L-type mini-plate for LeFort I osteotomy or a bicortical screw for bilateral sagittal split ramus osteotomy were utilized for rigid fixation. The evaluation included: a physical examination to detect preoperative and postoperative temporomandibular joint dysfunction, 3-dimensional computed tomography and oblique transcranial temporomandibular joint radiography to measure 3-dimensional condylar head movement, and posteroanterior and lateral cephalometric radiography to measure the preoperative and postoperative movement of the bony segment and relapse rate. Results A 0.3% relapse rate was observed in the coronal plane, and a 2.8% relapse rate in the sagittal plane, which is indistinguishable from the dental relapse rate in orthodontic treatment. The condylar repositioning plate could not fully prevent movement of the condylar head, but the relapse rate was minimal, implying that the movement of the condylar head was within tolerable limits. Conclusions Our condylar repositioning method using a centric relation splint and miniplate in orthognathic surgery was found to be simple and effective for patients suffering from skeletal jaw deformities.

• Archives of Plastic Surgery
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• 제41권5호
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• pp.493-499
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• 2014

Background Maintaining stability and restoring the aesthetic appearance are the fundamental goals when managing zygomatic fractures. We aimed to evaluate the stability and anthropometric outcomes of zygomatic fracture patients who underwent two-point fixation involving the infraorbital rim and zygomaticomaxillary buttress via the transconjunctival and gingivobuccal approaches without any skin incisions. Methods We examined 15 zygomatic fracture patients who underwent two-point fixation during a 3-year period. Stability was evaluated using three-dimensional facial bone computed tomography. Superoinferior and anteroposterior displacement of the zygoma was quantified. The aesthetic appearance of the periorbital region was evaluated using indirect anthropometry with standardized clinical photographs. The ratios between the eye fissure height and width, and lower iris coverage ratio were used to evaluate aesthetical changes. The bony displacement and aesthetic ratios were analyzed using Wilcoxon or Friedman tests. The correlation between the preoperative zygoma position and anthropometric values was analyzed. Results The positions of the zygoma were similar to those on the contralateral side at the long-term follow-up. The preoperative anthropometric measurements on the fractured side differed from those on the contralateral side, although these values were close to the normal values at the long-term follow-up. Furthermore, we noted that the anteroposterior displacement strongly positively correlated with the lower iris coverage rate (Spearman's coefficient=0.678, P=0.005). Conclusions Two-point fixation of zygomatic fractures achieved stable outcomes on long-term follow-up, and also appeared to be reliable in restoring the aesthetic appearance of the periorbital region.

• Clinics in Shoulder and Elbow
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• 제20권1호
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• pp.30-36
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• 2017

Background: Isolated infraspinatus tear is very rare and clinical features are not as well known, therefore the purpose of this study was to evaluate clinical characteristics and outcomes of isolated infraspinatus tear that authors experienced. Methods: Authors reviewed 288 cases of full-thickness rotator cuff tear involving infraspinatus between 2010 and 2015, and retrospectively analyzed six cases of isolated infraspinatus tear. Perioperative clinical characteristics, postoperative functional outcomes of 6 months were investigated. Functional evaluation included visual analogue scale (VAS), range of motions, American Shoulder and Elbow Surgeons (ASES) score, and Constant score. Results: Calcific tendinitis was accompanied in 4 cases (66.7%). Three of them received steroid injection or aspiration or extracorporeal shockwave therapy. Mean preoperative pain VAS was 7.1 (range, 5-9), and mean postoperative pain VAS at 6 months later was 1.6 (range, 0-5). Preoperative muscle strength by isokinetic muscle performance test showed 52% deficit of abduction and 37.6% deficit of external rotation. All 6 patients had arthroscopic repair of the infraspinatus tendon. All the patients at the 6 months follow-up exhibited clinical improvement in the Constant score (67.8 [range, 45-77] to 89.3 [range, 81-100], p=0.029), and ASES score (52.3 [range, 30-77] to 90.0 [range, 80-100], p=0.002). There was no healing failure on imaging. Conclusions: Isolated infraspinatus tendon tear was frequently accompanied by calcific tendinitis, but pathophysiologic relationship should need more study. To rule out neurogenic etiology, magnetic resonance imaging and electromyography would be helpful. Arthroscopic infraspinatus tendon repair and supraspinatus debridement showed relatively good result in painful shoulder.

• 대한후두음성언어의학회지
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• 제8권2호
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• pp.166-172
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• 1997

Background : For example, aerodynamic study, vibratory study, acoustic study, neuro-muscular test and psychoacoustic evaluation, a number of objective methods are now available for assessing pathologic voice change. They help to differentiate pathologic condition from normal condition and to monitor pathologic and aging change. These laboratory analyses are used commonly to monitor speech therapy and to follow a patient's recovery after surgery. Objectives : We investigated the values of jitter, shimmer and NNE of normal person and hoarseness patients in Korea. The values of Jitter and shimmer might be meaningful parameters distinguishing pathologic vibration from normal and recovery after surgery. Materials and Methods : Statistical significance between normal control and 48 subjects taken microlaryngeal surgery were compared with Dr. speech science program that is computerized system for acoustic analysis of voice production employed to determine vocal characteristics of pitch perturbation(jitter) and amplitude perturbation(shimmer). Results : The mean normal values of jitter and shimmer were 0.226${\pm}$0.110(%), 2.200${\pm}$0.421(%) in male and 0.164${\pm}$0.060(%), 2.063 ${\pm}$0.575(%) in female. In patients with vocal nodule, the preoperative and postoperative values of jitter and shimmer were valueless. In patients with vocal polyps, the preoperative and postoperative values of jitter and shimmer were valuable. Conclusion : Dr. speech science program was effective to monitor laryngeal disease and aging changes.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1993년도 제27차 학술대회 초록집
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• pp.90-90
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• 1993

후두암의 치료계획에 있어 어려운 점들로는 종양의 3차원적 위치, 점막하를 통한 전파, 후두연골의 침윤 여부 등이다. 특히 후두연골 침윤은 국소재발과 경부전이의 빈도가 높아 예후가 좋지 않다. 저자들은 후두암의 전파와 후두연골에의 침윤 양상을 이해하고 술전 임상적 진단의 정확도를 높여 치료방향을 설정하는데 도움을 얻고자 1991년 4월부터 1992년 11월까지 후두암으로 혹은 전적출술을 시행했던 예중 18례의 후두표본을 대상으로 연속 대절편을 제작하여 병리조직학적 관찰을 하고 다음과 같은 결과를 얻었다. 1. 후두연골 침윤의 양상은 주로 연골의 골화된 부위를 침범하였고 골화되지 않은 연골의 침윤은 매우 드물었다. 2. 침윤된 골화연골에서는 연골막이 건전하더라도 골수를 통해 전파하였다. 3. 연골막은 종양전이의 아주 강한 방어벽이었다. 4. 후두연골 침윤의 빈도는 갑상연골, 피열연골, 윤상연골, 후두개연골 순이었고 횡성문암에서는 후두연골 침윤이 88.9 % 로 상당히 높았다. 5. 후두연골 침윤여부에 대한 술전 CT의 민감도는 100%, 특이도 62.5%, 정확도 82.3%이다.