Rabbit model for the study of nasal tip plasty: a comparative cephalometric analysis after rhinoplasty

Myung-Good Kim,Jeong-Ho Ryu,Dong Min Lee,Tae-Seo Park,Ji-An Choi 대한미용성형외과학회 2023 Archives of Aesthetic Plastic Surgery Vol.29 No.4

Background Open rhinoplasty and septoplasty have emerged as popular surgical techniques for both functional and aesthetic procedures. To study open rhinoplasty with or without septoplasty, the use of animals is necessary. However, no reports have been published on radiologic methods for evaluating rhinoplasty or nasal tip plasty in animals using cephalometry. In this study, a validated model of open rhinoplasty and septoplasty was utilized in rabbits to establish radiographic guidelines for assessing the degree of tip plasty in these animals. Methods Eight adult New Zealand rabbits were used to establish an autologous septal extension graft (SEG) model. The rabbits underwent concurrent submucosal septal resection and open rhinoplasty. The SEG was implanted using nasal septal cartilage. To evaluate the results of nasal tip plasty, lateral-view X-ray images were obtained preoperatively, as well as 2 days, 2 months, and 12 months postoperatively. Results This open rhinoplasty rabbit model appears to be a practical tool for studying open rhinoplasty and tip plasty, demonstrating statistically significant results following SEG implantation. Furthermore, it is suitable for training purposes, specifically for the submucosal resection of septal cartilage. Conclusions This study presents a statistical analysis of the long-term (1-year) postoperative results of SEG implantation, using experimental procedures like those utilized in humans. Through a cephalometric comparison of rabbit noses, the effect of various SEG and tip plasty methods on the rabbit nose can be objectively measured.

Micropipette tip intubation in rats as a replacement for conventional endotracheal tube intubation

Myung-Good Kim,Jeong-Ho Ryu,Dong Min Lee,Tae-Seo Park,Ji-An Choi 대한두개안면성형외과학회 2023 Archives of Craniofacial Surgery Vol.24 No.2

Endotracheal intubation is often necessary in the course of animal experiments, especially in craniofacial surgery. However, endotracheal intubation can be a major burden in this context. The authors performed simple and cost-saving method using a 200 μL yellow micropipette tip, and the success of this method was demonstrated by X-ray and autopsy. We used a total of 30 rats. After the rats were fixed with a plaster, the trachea and vocal cords were visualized with the tongue pulled back. Under direct visualization of the vocal cords, a curving micropipette tip was advanced into the trachea. This method can be learned quickly and applied successfully by general experimenters. We successfully intubated all 30 rats without any complications. The success rate of micropipette tip intubation was 100%. This procedure was performed by one experimenter within 2 to 3 minutes after induction of anesthesia. We demonstrated its superiority by X-ray and autopsy. Herein, we describe endotracheal intubation of rats using micropipette tips. To the best of our knowledge, this method is novel and represents the simplest and most efficient means of intubation in rats, providing an alternative to conventional endotracheal intubation.

Bone Framework Graft through an Intraoral Approach in a Patient with Columellar Scar Contracture

Myung-Good Kim,Ie Hyon Park,Chang Sik Pak,Baek-Kyu Kim,Jae Hoon Jeong 대한미용성형외과학회 2016 Archives of Aesthetic Plastic Surgery Vol.22 No.3

We present our experience with calvarial bone framework insertion through an intraoral approach for a patient who was at risk for columellar necrosis due to a previous open rhinoplasty. A 58-year-old woman exhibited severe columellar contracture, so that the columellar tissue was too fragile to be touched. We could not incise the columella and insert a new nasal implant through the bilateral rim incision. Moreover, the patient had septal cartilage perforation and collapse. The patient needed columellar support as well as nasal dorsum reconstruction. The authors decided to graft an autogenous L-strut bone framework through an intraoral approach. Two pieces of 5-cm × 1-cm sized split calvarial bone were harvested and trimmed to fit the width and length of the nasal dorsum and columella. The right-angle-shaped bone framework was made with an absorbable plate and screws. Through a gingivobuccal incision, the bone framework graft was inserted and the graft was fixed with absorbable screws. The patient did not experience complications such as skin necrosis or inflammation. A bone framework grafted through an intraoral approach can be a good choice for patients who have experienced scar contracture in the columella, septal cartilage perforation, and collapse.

An Intermaxillary Fixation Screw Traction Wire: An Aid for Facial Bone Fracture Repair

Kim, Myung-Good,Yoo, Roh-Eul,Chang, Hak,Kwon, Sung-Tack,Baek, Rong-Min,Minn, Kyung-Won Lippincott Williams Wilkins, Inc. 2009 Annals of plastic surgery Vol.63 No.1

We have devised a new technique to improve stabilization of fractured facial bone fractures (frontal sinus fractures, zygomatic fractures, mandibular condyle fractures) by intermaxillary fixation screw traction wires (stainless steel wires through intermaxillary fixation screws). A retrospective study evaluating intermaxillary fixation screw traction wires was performed.We have used this technique for 3 cases of frontal sinus fractures, 9 cases of zygomatic fractures, and 7 cases of mandibular condyle fractures. After dissection of a fractured site, a hole is drilled on the fractured bone where it does not interfere with positioning the plate across the fracture line. After an intermaxillary fixation screw is inserted, a stainless steel wire is tied through a hole in the screw head. By the aid of wire for traction, the displaced fractured bone is easily aligned to the proper position. Plates and screws are applied readily on the predetermined area. A retrospective study on 19 patients using intermaxillary fixation screw traction wires was performed. The diagnoses and associated complications of the cases were recorded.No associated complication as a result of using this technique was identified. The use of intermaxillary fixation screw traction wire enhances stabilization and visualization without possible risk for surrounding soft tissue injury using, a sharp traction device like a bone hook.An intermaxillary fixation screw traction wire is an useful aid for visualization and stabilization during facial bone fracture reduction, particularly where exposure is difficult such as in the condylar region of the mandible. And unlike a classic traction wire, the intermaxillary fixation screw traction wire has almost no risk of having it loosened from the screw.

Removal of an intraosseous hemangioma of the frontal bone through an anterior hairline incision: a case report

Myung-Good Kim,Jeong-Ho Ryu,Dong Min Lee,Tae-Seo Park,Ji-An Choi,Keun-Cheol Lee,Song-Hee Han Korean Cleft Palate-Craniofacial Association 2023 Archives of Craniofacial Surgery Vol.24 No.4

An intraosseous hemangioma of the frontal bone is typically removed via a coronal incision. This procedure, while effective, can be lengthy and may result in complications such as a prominent scar and hair loss. An alternative approach involves a direct incision in the forehead, which leaves a less noticeable scar and allows a quicker recovery. However, in this specific case, the patient declined both coronal surgery and surgery through a direct forehead incision due to cosmetic concerns. Therefore, we proposed an anterior hairline incision. A 35-year-old woman presented with a firm, non-mobile, palpable mass on her right forehead. Preoperative non-contrast computed tomography revealed a heterogeneous osteolytic lesion. We performed an excisional biopsy through the anterior hairline. Postoperative non-contrast computed tomography was conducted 2 and 6 months after surgery. The wound was clean and free of complications, and there was no local recurrence. Partial resection can reduce scarring for patients who are concerned about cosmetic outcomes. However, the potential for recurrence remains a significant concern. We present this case of an anterior hairline incision for a hemangioma located in the forehead, evaluated using serial computed tomography for both preoperative and postoperative imaging.

당뇨병 환자에서의 혈청치질 및 Hemoglobin Alc에 관한 연구

김명식,박병국,허성호,유석희,신순현 중앙대부설한국의과학연구소 1982 한국의과학 Vol.14 No.2

관골궁 골절의 정복 시 술중 이동식 CT의 유용성

김명국,노용준,이훈영,김민호,이신철,Kim, Myung-Good,Noh, Yong-Joon,Lee, Hoon-Young,Kim, Min-Ho,Lee, Sin-Chul 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.1

Purpose: The purpose of this study is to describe the usefulness of intraoperative mobile CT scans in the reduction of zygomatic arch fracture. Method: Two patients with zygomatic arch fractures were selected who were indications of closed reduction by Gilles' approach. After the reduction was done in the operating room with zygomatic arch elevator, intraoperative CT scan was done to check the extent of reduction. Additional reduction was performed according to the obtained images from the intraoperative mobile CT scan. Examination of the preoperative CT, intraoperative CT after the reduction, and postoperative plain X-ray films were done for documentation and analysis. Results: Reduction was carried out successfully to the patients without any complications. Both patients were satisfied with the postoperative cosmetic and functional outcome. Revisional surgery was not necessary during the 6 months follow up. Conclusion: The advantage of this method is that it is easier to obtain three dimensional relationships of the fracture site. Furthermore, the operator is less exposed to radiation hazards compared to other methods that obtain intraoperative images such as the C-arm. In conclusion, intraoperative mobile CT scan can be a useful surgical aid in the reduction of zygomatic arch fractures.

두피에 발생한 혈관육종의 수술시 Mapping Biopsy의 유용성

강민구(Min Gu Kang),박종림(Jong Lim Park),김명국(Myung Good Kim),장 학(Hak Chang),민경원(Kyung Won Minn),고경석(Kyung Suck Koh) 대한두경부종양학회 2007 대한두경부 종양학회지 Vol.23 No.1

Objectives :Cutaneous angiosarcoma is an infrequent but aggressive neoplasm involving the skin of the face and scalp. Unfamiliarity with the clinical manifestations of cutaneous angiosarcoma frequently leads to misdiagnosis and delay in treatment. Complete surgical resection requires the performance of preoperative staging biopsies to determine the true extent of the neoplasm. Intraoperative frozen section analysis to determine the adequacy of the surgical resection is unreliable due to the high false negative rate. Material and Methods :In five scalp angiosarcoma cases, mapping biopsies were performed at far from the suspected edge of the neoplasm. On permanent pathology, we obtained tumor free margin with occasional focal involvement of the tumor. Results :Frozen-section analysis of the resected margins is inconclusive, for the subtle diagnostic features of angiosarcoma are distorted by the tissue processing required for frozen-section analysis. The characteristic dermal vessels lined by their malignant cells are collapsed by the freezing process. This results in a high rate of false-negative reports and possibly leads to incomplete resection of the neoplasm. Conclusion :Our recommendation is to establish the margins of the tumor by performing preoperative eval-uations by mapping biopsies.

Case Reports : Aneurysmal Benign Fibrous Histiocytoma with Atrophic Features

Jung Won Shin,Hyun Sun Park,Byoung Kwon Kim,Young A Kim,Myung Good Kim,Chong Hyun Won,So Yun Cho 대한피부과학회 2009 Annals of Dermatology Vol.21 No.1