• Maxillofacial Plastic and Reconstructive Surgery
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• 제28권3호
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• pp.242-246
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• 2006

Objective : This is to report the criteria of success of intraoral distraction osteogenesis for alveolar augmentation in the severely atrophied alveolar defects through clinical result of 2 cases. Subjects and Methods : Anterior segmental osteotomy was performed and alveolar distractors (Martin and Leibinger, Germany) were applied each in 2 patients with severely defected anterior maxillary area. The osteomized alveolar segments were distracted by 1mm a day after latency period. After the consolidation period implants were installed with removal of distractor. The implants were evaluated clinically and radiographically. Results : In Case I, the distracted bone was directed to the palatal side, and another augmentation treatment - block bone graft, guided bone regeneration - was needed. In Case II, the successful alveolar bone augmentation was achieved. Dental implant was placed on distracted alveolar bone, and showed good osseointegration and good function without any complication. Conclusion : Distraction osteogenesis can be a good choice for alveolar ridge augmentation of severely atrophied ridges. However, the anterior esthetic prosthetics relies on the control of the vector, the kind of distractor, the healing capacity of patient and the etiology of atrophy. Therefore another study of each category would be needed.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제34권4호
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• pp.252-259
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• 2012

Purpose: This study evaluated the postoperative stability of counter clockwise rotation of the mandibular plane in anterior openbite patients, who have had one jaw surgery performed. Methods: This study includes patients with skeletal class III malocclusion accompanied by anterior openbite among the patients who have had BSSRO performed, resulting in counter clockwise rotation of the mandibule. We excluded the patients with genioplasty and segmental surgery, and included 23 patients who underwent BSSRO. Results: We found no statistical significance between the amount of counter clockwise rotation in the mandible in the Pearson correlation test. Also, there was no significant difference between Group 1 (< $3^{\circ}$) and Group 2 (> $3^{\circ}$). Conclusion: This study evaluated the amount of horizontal relapse, and the degree of relapse. Stable results were obtained. Although there was no statistical significance between the degree of openbite and the amount of horizontal relapse, the group with a greater amount of openbite had a greater amount of relapse.

• Journal of Chest Surgery
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• 제28권12호
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• pp.1178-1182
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• 1995

We experienced one case of endobronchial hamartoma on left lower lobar bronchus in sixty year old male patient. Less than 1 % of lung tumors are benign, and the prevalence of endobronchial hamartoma is reported to be from 3 % to 40 %. The mean age was 52.9 years, and equal gender prevalence.Symptoms were related to intraluminal growth, including fever, chill, productive cough, hemoptysis, exertional dyspnea, recurrent pneumonia and so on. Bronchoscopic finding was tumor present as polypoid mass in the lumen of a left main stem bronchus,distal to 3 cm from carina. Biopsy was done. The histopathologic pattern showed several nodules of loose myxoid tissue and islands of cartilage. We performed partial resection of the affected bronchus,1cm anterior to the superior segmental bronchial opening to just distal from superior segmental orifice. Including superior segmentectomy, partial resection of the left lower lobar bronchial resection and end-to-end anastomosis with 4-0 Poly dioxanone sutere materials interruptedly. We report this case with the brief review of literatures.

• Journal of Korean Neurosurgical Society
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• 제64권4호
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• pp.552-561
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• 2021

Objective : To compare the anterior cervical discectomy and fusion (ACDF) and posterior cervical fusion (PCF) with wide facetectomy in the treatment of parallel-shaped bony foraminal stenosis (FS). Methods : Thirty-six patients underwent surgery due to one-or-two levels of parallel-shaped cervical FS. ACDF was performed in 16 patients, and PCF using CPS was performed in 20 patients. All patients were followed up at 1, 3, 6, and 12 months postoperatively. Standardized outcome measures such as Numeric rating scale (NRS) score for arm/neck pain and Neck disability index (NDI) were evaluated. Cervical radiographs were used to compare the C2-7 Cobb's angle, segmental angle, and fusion rates. Results : There was an improvement in NRS scores after both approaches for radicular arm pain (mean change -6.78 vs. -8.14, p=0.012), neck pain (mean change -1.67 vs. -4.36, p=0.038), and NDI score (-19.69 vs. -18.15, p=0.794). The segmental angle improvement was greater in the ACDF group than in the posterior group (9.4°±2.7° vs. 3.3°±5.1°, p=0.004). However, there was no significant difference in C2-7 Cobb angle between groups (16.2°±7.9° vs. 14.8°±8.5°, p=0.142). As a complication, dysphagia was observed in one case of the ACDF group. Conclusion : In the treatment of parallel-shaped bony FS up to two surgical levels, segmental angle improvement was more favorable in patients who underwent ACDF. However, PCF with wide facetectomy using CPS should be considered as an alternative treatment option in cases where the anterior approach is burdensome.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제27권4호
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• pp.365-371
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• 2005

In esthetic treatment of bimaxillary protrusion, it is important to move backward the anterior teeth segment. For the backward movement of the anterior teeth segment, orthodontic force and segmental osteotomy have been applied on the clinical treatment until recently. These methods caused long treatment time, anchorage loss, the possibility of root resorption and the complication followed by segmental osteotomy. Therefore, corticotomy has become a major concern lately. This research has been conducted to study the efficiency of corticotomy in the treatment of bimaxillary protrusion comparing the profile change, canine retraction velocity and space closing time. The research compared and analyzed space closing time, canine retraction velocity and profile change in two groups of patients. Both groups were formed out of patients over 18 years old who visited the department of dentistry in Hanyang University for treatments. The experimental group who was treated by corticotomy and Skeletal Anchorage System(SAS). The control group who received orthodontic treatment using SAS. The following results are produced after analyzing both groups. The significant statistic difference in space closing time has been observed in the experimental group as compared with the control group(p<0.05). In the experimental group, the significant statistic increase in canine retraction velocity was also observed(p<0.05). There was no significant difference in profile change between the control group and the experimental group(p<0.05). As a result, orthodontic treatment using corticotomy has a reasonable efficiency in space closing time as compared with the existing orthodontic treatment. Therefore, it is concluded that corticotomy with orthodontic treatment can be reasonably applied to dentofacial abnormality.

• 대한치과교정학회지
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• 제39권1호
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• pp.54-65
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• 2009

본 증례보고는 성인형 치주염으로 인해 전반적인 치조골 소실을 보이고 양악 전돌을 동반한 II급 부정교합으로 진단된 50세 10개월 된 여자환자의 치료를 소개하고자 한다. 치주 치료를 진행한 후 양악 전돌을 해소하기 위해 양악 제1소구치를 발치하고, 상악 전치부는 피질골 절단술 시행 후 악정형적 견인을, 하악 전치부는 6전치의 전방부 분절골 절단술[Anterior segment osteotomy(ASO)]을 국소마취하에 시행하였다. 총 치료기간은 9개월이 소요되었고 안정적인 교합관계와 안모의 개선이 이루어졌다. 하지만 치료 후에 하악 전치부에 약간의 치근 흡수 소견이 관찰되었다. 치료 27개월 후에도 안정적인 치료결과가 유지되었다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제39권
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• pp.16.1-16.6
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• 2017

Background: Mandibular reconstruction is performed after segmental mandibulectomy, and precise repositioning of the condylar head in the temporomandibular fossa is essential for maintaining preoperative occlusion. Methods: In cases without involvement of soft tissue around the mandibular bone, the autopolymer resin in a soft state is pressed against the lower border of the mandible and buccal and lingual sides of the 3D model on the excised side. After hardening, it is shaved with a carbide bar to make the proximal and distal parts parallel to the resected surface in order to determine the direction of mandibular resection. On the other hand, in cases that require resection of soft tissue around the mandible such as cases of a malignant tumor, right and left mandibular rami of the 3D model are connected with the autopolymer resin to keep the preoperative position between proximal and distal segments before surgical simulation. The device is made to fit the lower border of the anterior mandible and the posterior border of the mandibular ramus. The device has a U-shaped handle so that adaptation of the device will not interfere with the soft tissue to be removed and has holes to be fixed on the mandible with screws. Results: We successfully performed the planned accurate segmental mandibulectomy and the precise repositioning of the condylar head by the device. Conclusions: The present technique and device that we developed proved to be simple and useful for restoring the preoperative condylar head positioning in the temporomandibular fossa and the precise resection of the mandible.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.187-188
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• 2006

A 3-D finite element model of human thoracolumbar spine (T12-L2) was reconstructed from CT images. Various anterior and posterior instrumentation techniques were performed with long cage after corpectomy. Six loading cases were applied up to 10 Nm, espectively. The rotations of T12 with respect to L2 were measured and the stiffnesses were calculated as the applied forces divided by the segmental rotations. The posterior fixation technique increased the stiffness of the spine the most. The addition of anterior rod from 1 to 2 increased the stiffness significantly without posterior fixation, but no effect was found with posterior fixation. We found that different fixation techniques changed the stiffness of the spine.

• Journal of Chest Surgery
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• 제38권9호
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• pp.652-655
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• 2005

폐실질내 과오종에 비해 기관지 내 과오종은 드문 질환으로 폐실질 내 과오종이 우연히 발견되는 것에 비해 기관지 내 과오종은 기관지 폐색에 의한 증상이 유발되어 발견되는 경우가 많다. 47세 남자가 한 달간의 기침을 주소로 내원하였다. 기관지 내시경에서 좌상엽 전구역을 페쇄하고 있는 과오종이 발견되었으며 좌상엽전구역 절제술로 제거되었다. 저자들은 좌상엽 전구역 절제술로 제거된 기관지내 과오종을 경험하여 보고하는 바이다.

• Journal of Korean Neurosurgical Society
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• 제61권2호
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• pp.224-232
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• 2018

Objective : Cervical ossification of the posterior longitudinal ligament (OPLL) can be treated via anterior or posterior approach, or both. The optimal approach depends on the characteristics of OPLL and cervical curvature. Although most patients can be successfully treated by a single surgery with the proper approach, renewed or newly developed neurological deterioration often requires repeat surgery. Methods : Twenty-seven patients with renewed or newly developed neurological deterioration requiring salvage surgery for multi-segment cervical OPLL were enrolled. Ten patients (group AP) underwent anterior approach, and 17 patients (group PA) underwent posterior approach at the initial surgery. Clinical and radiological data from initial and repeat surgeries were obtained and analyzed retrospectively. Results : The intervals between the initial and repeat surgeries were $102.80{\pm}60.08months$ (group AP) and $61.00{\pm}8.16months$ (group PA) (p<0.05). In group AP, the main OPLL lesions were removed during the initial surgery. There was a tendency that the site of main OPLL lesions causing renewed or newly developed neurological deterioration were different from that of the initial surgery (8/10, p<0.05). Repeat surgery was performed for progressed OPLL lesions at another segment as the main pathology. In group PA, the main OPLL lesions at the initial surgery continued as the main pathology for repeat surgery. Progression of kyphosis in the cervical curvature (Cobb's angle on C2-7 and segmental angle on the main OPLL lesion) was noted between the initial and repeat surgeries. Group PA showed more kyphotic cervical curvature compared to group AP at the time of repeat surgery (p<0.05). Conclusion : The reasons for repeat surgery depend on the type of initial surgery. The main factors leading to repeat surgery are progression of remnant OPLL at a different segment in group AP and kyphotic change of the cervical curvature in group PA.