• Archives of Plastic Surgery
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• 제44권2호
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• pp.166-169
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• 2017

The goal of auricular cartilage harvest is to obtain a sufficient amount for reconstruction and to minimize the change in ear shape. The cartilage can be harvested by a posterior or anterior approach, and each method has advantages and disadvantages. The posterior approach presents the advantage of scar concealment, but there are limits to the amount of cymba cartilage that may be harvested. In contrast, the anterior approach may cause a noticeable scar. However, as cartilage is collected, the anterior approach provides a view that facilitates the preservation ear structure. In addition, it is possible to obtain a greater amount of cartilage. From January 2014 to December 2015, we harvested auricular cartilage graft material in 17 patients. To prevent the development of trapdoor scars or linear scar contracture, short incisions were made on the superior border of the cymba and cavum. Two small and narrow incisions were made, resulting in suboptimal exposure of the surgical site, which heightens the potential for damaging the cartilage when using existing tools. To minimize this, the authors used a newly invented ball-type elevator. All patients recovered without complications after surgery and reported satisfaction with the shape of the ear.

• Journal of Chest Surgery
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• 제33권7호
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• pp.570-575
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• 2000

Background; Surgical resection remains the mainstay of treatment for esophageal cancer. Despite recent advances in surgical therapy, i.e. en bloc resection and extended lymphadenectomy, the overall long-term prognosis of patients with esophageal carcinoma has not, however, improved during the last decades. One of the major reasons in its relatively high recurrence rate. Material and Method; A retrospective review of recurrent patte군 of cancer in 42 patients who underwent curative surgery for primary esophageal cancer was performed clinically and histo-phthologically. Result; Nineteen patients had developed recurrece during the 18 to 52 months(mean 34.2 nonths), 8 had local recurrences, 1 had both, and 11 had systemic recurrences. Twelve patients(63%) had developed recurrence within 1 year, 5 patients(26%) between 1 year to 2 patients(11%) after 2 years. The recurrence rate according to growth pattern of tumor or presence of microinvasive findings was not statistically significant, but it increased significantly in clinical tumor stage III than stage IIA, B and in patients with the number of metastatic lymph node over ten. Conclusion; Post-operative recurrences of esophageal cancer appear as a high rate even though curative wide resection was done. Several clinical and histo-pathological factors correlate with the recurrence.

• 한국동물위생학회지
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• 제35권1호
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• pp.77-82
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• 2012

Inflammatory pseudotumor (IPT) is a term defining a mass characterized microscopically by a proliferation of bland mesenchymal spindle cells infiltrated by diffuse mixed inflammatory cells with a predominance of plasma cells and lymphocytes. Here, we show the primo vessel-like structure of the primo-vascular system (PVS) in a dog with IPT. A 6-years old male Mongrel dog was diagnosed with an abnormal mass (diameter 5.5 cm, weight 22 g) near left preputial area. The dog was submitted to the surgical detectomy of the mass. During the surgical operation, we observed primo vessel-like material. After fixations, the masses appeared macroscopically as lipoid-like, firm, white to grey masses, measuring $5{\times}8cm$. Histologically, cellular infiltration into the muscular layers was frequently seen. The mesenchymal proliferation remained the main component of the mass and was composed of myofibroblastic-like spindle cells characterized by globular, irregular nuclei containing open chromatin and a prominent nucleolus. On the basis of the histopathologic lesions, the subcutaneous mass was diagnosed as IPT. Also, we detected a primo vessel-like structures in some areas of the IPT tissues. These were observed as novel thread-like structures and bundle of tubular structures. To our knowledge, this report is the first case of primo vessel-like structure in a dog with IPT.

• Restorative Dentistry and Endodontics
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• 제41권4호
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• pp.310-315
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• 2016

Two case reports describing a new technique of creating a repositionable piezoelectric bony window osteotomy during apicoectomy in order to preserve bone and act as an autologous graft for the surgical site are described. Endodontic microsurgery of anterior teeth with an intact cortical plate and large periapical lesion generally involves removal of a significant amount of healthy bone in order to enucleate the diseased tissue and manage root ends. In the reported cases, apicoectomy was performed on the lateral incisors of two patients. A piezoelectric device was used to create and elevate a bony window at the surgical site, instead of drilling and destroying bone while making an osteotomy with conventional burs. Routine microsurgical procedures - lesion enucleation, root-end resection, and filling - were carried out through this window preparation. The bony window was repositioned to the original site and the soft tissue sutured. The cases were re-evaluated clinically and radiographically after a period of 12 - 24 months. At follow-up, radiographic healing was observed. No additional grafting material was needed despite the extent of the lesions. The indication for this procedure is when teeth present with an intact or near-intact buccal cortical plate and a large apical lesion to preserve the bone and use it as an autologous graft.

• Journal of Periodontal and Implant Science
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• 제32권1호
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• pp.69-87
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• 2002

Implant material, implant design, surface quality, status of the bone, surgical technique, and implant loading conditions were regarded as prerequisites for osseointegration which is a prime condition for implant success. The aim of this review paper was to investigate the survival rate of single implants in relation to the prerequisites for osseointegration. Fifty-eight papers reporting survival rates of single implants were selected by use of the 'PubMed' and hand searching. The survival rate of single implants were assessed with reference to factors influencing osseointegration. The results showed that single implants in general showed a high survival rate except a few failures in certain extreme conditions and early stages. Those failures and complications such as screw loosening and esthetic problem were almost solved with the development of implant components and surgical techniques and a better understanding of biology around a single implant. Single-tooth implant-replacement is now considered as a reliable and predictable treatment option for a single missing tooth and its application seems to expand to compromised situations which were previously thought to be impossible for single implant therapy.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제40권
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• pp.7.1-7.5
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• 2018

Background: Oroantral communicating defects, characterized by a connection between the maxillary sinus and the oral cavity, are often induced by tooth extraction, removal of cysts and benign tumors, and resection of malignant tumors. The surgical defect may develop into an oroantral fistula, with resultant patient discomfort and chronic maxillary sinusitis. Small defects may close spontaneously; however, large oroantral defects generally require reconstruction. These large defects can be reconstructed with skin grafts and vascularized free flaps with or without bone graft. However, such surgical techniques are complex and technically difficult. A buccal fat pad is an effective, reliable, and straightforward material for reconstruction. Case presentation: This report describes three cases of reconstruction of large oroantral defects, all of which were covered by a pedicled buccal fat pad. Follow-up photography and radiologic imaging showed successful closure of the oroantral defects. Furthermore, there were no operative site complications, and no patient reported postsurgical discomfort. Conclusion: In conclusion, the use of the pedicled buccal fat pad is a reliable, safe, and successful method for the reconstruction of large oroantral defects.

• Restorative Dentistry and Endodontics
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• 제25권2호
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• pp.159-169
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• 2000

The purpose of this study was to examine the tissue response to experimental furcation perforations immediately treated with Super EBA, Ketac Silver, MTA and Emdogain using surgical microscope. Forty experimental furcation perforations were created in the mandibular and maxillary premolars and molars of 4 adult dogs and immediately repaired with experimental materials. The animals were sacrificed after 16 weeks and radiographic and histologic results were evaluated. The results were as follows. 1 All materials tested in this experiment revealed a certain degree of extrusion of the filling materials and infiltration of inflammatory cells into the periodontal space. Except MTA group, epithelial down-growth of the surrounding gingiva was found in all experimental groups. 2. Both Ketac Silver and Emdogain group showed the greatest degree of inflammatory reaction and bone resorption. 3. Super EBA group showed moderate inflammation and newly bone formation under the perforation area. 4. MTA group showed minor inflammation, new bone regeneration toward restorative materials and partially cementum growth onto the surface of the material. This group demonstrated a favorable prognosis.

• 대한두개안면성형외과학회지
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• 제16권1호
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• pp.29-30
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• 2015

In cleft palate surgery, the environment is especially critical when suturing. Encum-bered, obstructive space in the environment can hinder a suture while using the Dingman mouth gag. We introduced a novel but simple draping technique. A simple hand towel is placed over the gag. A hole is cut out in the middle according to each patient's mouth. After making the hole, the hand towel is soaked in water and gently squeezed. Then the towel is properly placed over the Dingman mouth gag. Dripping water on the hand towel during the suture helps keep it in place. Using this draping technique, we cut 14 minutes of operation time compared to the average operation time of the past 2 years. There were several disadvantages in previous draping method. First, long suture material may easily get caught. Second, the operation field can easily be contaminated. Third, focusing on the operation becomes difficult due to the obstruction. This draping technique can compensate for the disadvantages of the previous Dingman mouth gag.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제47권4호
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• pp.279-285
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• 2021

Objectives: Wound healing is an integral part of any surgical procedure. Appropriate wound closure is critical to any successful surgical procedure, especially intraoral procedures. Various factors aid in wound healing, both pharmacological and non-pharmacological. Dehydrated human amniotic/chorionic membrane (dHACM) is an emerging bioinert material that contains anti-inflammatory properties, angiogenetic properties, osteogenic potential, and various growth factors. The purpose of this study was to evaluate the efficacy of wound healing properties of dHACM in bilateral alveoloplasty patients. Materials and Methods: A prospective split-mouth study was conducted on 10 patients. Site A received sutures with dHACM and site B was sutured without dHACM. Wound healing was assessed with the Landry, Turnbull, and Howley Index. Results: Sites A and site B were compared. A P<0.05 and a test value of 22 was obtained, indicating a statistical difference between the two sites. Conclusion: Our study showed better healing with dHACM than without.

• Journal of Chest Surgery
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• 제35권12호
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• pp.871-875
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• 2002

급성 심근경색 후 발생한 심실중격결손은 조기에 적극적인 치료에도 수술 사망률이 매우 높은 질환이다. 저자들은 10년간 급성 심근경색 후 심실중격결손으로 수술한 환자들의 수술 결과와 장기 결과를 분석하였다. 대상 및 방법: 1991년 1월부터 2001년 5월까지 연세대학교 흉부외과에서 급성 심근경색 후 발생한 심실중격결손으로 수술 받은 17명을 조사하였다. 환자들의 평균 나이는 63.2$\pm$9.1세로 남자가 10명, 여자가 7명이었으며, 16명의 환자는 전방부 중격결손 이었고, 1명은 하부 중격결손 이었다. 12명의 환자는 수술 전 심인성 쇽으로 대동맥내풍선펌프를 삽입하였다. 심근경색 후 심실중격결손 발생까지의 기간은 평균 5.6일이었으며, 급성기에 수술 한 환자는 14례로, 심실중격결손 진단 후 수술까지의 평균 기간은 2.5일 이었다. 11명의 환자들은 관상동맥 우회술을 함께 시행받았다. 결과: 수술 후 4명이 30일 이내에 사망하였으며(30일 사망률＝23.5%), 이는 모두 심인성 쇽이 있던 12명의 환자군에서 발생하였다(사망률＝33.3%). 평균 52개월간의 관찰기간에서 1명의 환자가 원인 불명으로 사망하였으며, 퇴원한 환자들의 10년 생존률은 66.7%였다. 추적이 되지 않은 1명을 제외한 10명의 환자들은 마지막 외래 관찰시 모두 NYHA functional class I이나 II였다. 결론: 급성 심근경색 후 발생한 심실중격결손은 가능한 조기에 수술하는 것이 환자의 생존에 매우 중요하다고 생각하며, 장기 결과도 양호 하다고 생각한다.