• 대한두개안면성형외과학회지
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• 제18권1호
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• pp.59-61
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• 2017

As the number of people who have undergone augmentation rhinoplasty has increased recently, nasal fractures are becoming more common after rhinoplasty. A silicone implant can affect the nasal fracture pattern, but there is no significant difference in treatment methods commonly. A 28-year-old female who had undergone augmentation visited our clinic with a nasal fracture. Computed tomography revealed that the silicone implant was sandwiched between the intact nasal bones with fractured bone fragments. In this case, open reduction was inevitable and a new silicone implant was inserted after reduction. Migration of the silicone implant beneath the nasal bone is a very rare phenomenon, but its accurate prevention and diagnosis is important because a closed reduction is impossible.

• 대한치과의사협회지
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• 제54권7호
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• pp.501-512
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• 2016

We evaluated a self-inflatable osmotic tissue expander for its utility in creating sufficient soft tissue elongation for primary closure after bone grafting. Six patients with alveolar defects who required vertical augmentation of >6 mm before implant placement were enrolled. All had more than three prior surgeries, and flap advancement for primary coverage was restricted by severely fibrosed scars. Expanders were inserted beneath the flap and fixed with a screw. After 4 weeks, expander removal and bone grafting were performed simultaneously. A vertical block autograft and guided bone regeneration and distraction osteogenesis were performed. Expansion was sufficient to cover the grafted area without additional periosteal incision. Complications included mucosal perforation and displacement of the expander. All augmentation procedures healed uneventfully and the osseous implants were successfully placed. The tissue expander may facilitate primary closure by increasing soft tissue volume. In our experience, this device is effective, rapid, and minimally invasive, especially in fibrous scar tissue.

• The Korean Journal of Pain
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• 제34권4호
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• pp.375-393
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• 2021

Percutaneous osteoplasty (POP) is defined as the injection of bone cement into various painful bony lesions, refractory to conventional therapy, as an extended technique of percutaneous vertebroplasty (PVP). POP can be applied to benign osteochondral lesions and malignant metastatic lesions throughout the whole skeleton, whereas PVP is restricted to the vertebral body. Common spinal metastases occur in the thoracic (70%), lumbosacral (20%), and cervical (10%) vertebrae, in order of frequency. Extraspinal metastases into the ribs, scapulae, sternum, and humeral head commonly originate from lung and breast cancers; extraspinal metastases into the pelvis and femoral head come from prostate, urinary bladder, colon, and uterine cervical cancers. Pain is aggravated in the dependent (or weight bearing) position, or during movement (or respiration). The tenderness and imaging diagnosis should match. The supposed mechanism of pain relief in POP is the augmentation of damaged bones, thermal and chemical ablation of the nociceptive nerves, and local inhibition of tumor invasion. Adjacent (facet) joint injections may be needed prior to POP (PVP). The length and thickness of the applied needle should be chosen according to the targeted bone. Bone cement is also selected by its osteoconduction, osteoinduction, and osteogenesis. Needle route should be chosen as a shortcut to reach the target bony lesions, without damage to the nerves and vessels. POP is a promising minimally invasive procedure for immediate pain relief. This review provides a technical survey for POPs in painful bony lesions.

• 대한치과보철학회지
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• 제48권3호
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• pp.202-208
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• 2010

연구 목적: 이 연구의 목적은 골형성단백질 (recombinant human Bone Morphogenetic Protein-2; rhBMP-2)이 코팅된 임플란트가 치조골 증대에 미치는 영향을 알아보는 것이다. 연구 재료 및 방법: 6마리의 비글견이 실험에 사용되었다. 6개의 8 mm 길이의 임플란트가 발치 후 6개월 이상의 충분한 치유기간이 경과한 비글견의 치조골에 5 mm 깊이로 식립되었다. 각각의 동물에 좌측과 우측의 악궁-분할형으로 임의추출하여 한쪽에는 1.5 ml/mg 농도의 rhBMP-2가 코팅된 임플란트를, 반대편에는 코팅되지 않은 대조군 임플란트를 식립하고 임플란트 주변 골에 round bur를 이용하여 피질골 천공을 시행하였다. 점막골막판막에 이완절개를 시행하여 판막을 접합시키고 봉합하여 임플란트가 피개되도록 하였다. 방사선 사진 촬영은 수술 직후 (기준치), 수술 4주후, 수술 8주 후에 시행하였다. 측정은 각 방사선 사진의 임플란트 덮개나사 최상방에서 변연골까지의 거리를 측정하여 골 형성량을 계산하였다. 수술 직후와 수술 8주 후에 임플란트 안정도 (Implant Stability Quotient value; ISQ value)를 측정하였다. 통계분석을 위해 SPSS software를 사용하여 Man-Whitney ranksum test와 Wilcoxon signed ranksum test를 시행하였다. 통계적 유의수준은P=.05를 기준으로 하였다. 결과: 골형성단백질이 코팅된 임플란트에서 수직 결손부 상방으로 약 0.6 mm의 골 형성이 관찰되었다. 대조군에서는 제한된 양의 골 형성 혹은 골 소실이 일어났다. 각 시기에 따른 실험군과 대조군간의 골 형성량에 유의한 차이가 있었다 (P<.05). ISQ value는 수술 직후에는 실험군과 대조군의 유의한 차이가 없었지만 수술 8주 후에는 실험군에서 대조군 보다 유의하게 높게 증가되었다 (P<.05). 결론: 골형성단백질이 코팅된 임플란트는 완전히 치유된 치조골에서 임상적으로 유의한 골 증대 효과가 있는 것으로 보인다.

• Clinics in Shoulder and Elbow
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• 제13권2호
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• pp.237-243
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• 2010

목적: 관절경적 회전근 개 봉합술 시 뼈에 봉합 나사못을 안정적으로 고정하는 것이 중요하다. 그러나 고령의 환자에서 상완골 결절부위에 골다공증이 있는 경우 봉합 나사못이 빠지거나 고정이 불안정할 수 있다. 이에 저자들은 관절경적 회전근 개 봉합술에서 봉합 나사못의 고정 실패시 골 시멘트를 이용한 봉합 나사못 구멍 보강 기법을 소개하고 그 결과를 보고하고자 한다. 대상 및 방법: 2005년부터 2009년까지 관절경적 회전근 개 봉합술을 시행받은 223명 중 골 시멘트로 봉합 나사못 구멍을 보강했던 15명을 대상으로 하였다. 모두 여자로 평균 65 (49~77)세였고, 평균 추시 기간은 16 (6~32)개월 이었다. 주사기를 이용해 골 시멘트를 걸쭉한 액상의 상태에서 봉합 나사못 구멍에 주입한 후 압박기로 압력을 가하였으며 항아리 모양의 시멘트 맨틀을 만들도록 노력하였다. 시멘트가 굳어가기 시작할 무렵 봉합 나사못을 구멍에 삽입하였다. 최종 임상적 평가는 시각척도 통증 점수, 능동적 관절 운동범위, age-sex matched Constant score, UCLA score 등을 이용하여 분석하였다. 결과: 수술 전 촬영한 방사선 사진상, 상완골 대결절부의 낭종성 변화 또는 피질골의 위축 등이 전 예에서 보였다. 최종 추시 방사선 사진상 시멘트 음영의 변화는 볼 수 없었으며, 충진된 시멘트는 원래의 형태를 그대로 유지하였다. UCLA score는 평균 31점 (28~35점) 이었으며 최우수 6예, 우수 8예이었으며 1예는 보통의 결과를 보였다 (p-value 0.008). Age-sex matched Constant score는 평균 90점 (74~98점)으로 상승하였다 (p-value 0.008). 결론: 관절경적 회전근 개 봉합술에서 상완골 대결절부의 골위축이 있는 경우에도 골 시멘트를 이용한 봉합 나사못 구멍 보강술에 의하여 관절경적 봉합술을 시행할 수 있었으며 골 시멘트의 사용이 수술 후 결과에 부정적 영향을 미치지 않는 것으로 보인다.

• Journal of Periodontal and Implant Science
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• 제48권6호
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• pp.360-372
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• 2018

Purpose: It has been suggested that resonance frequency analysis (RFA) can measure changes in the stability of dental implants during osseointegration. This retrospective study aimed to evaluate dental implant stability at the time of surgery (primary stability; PS) and secondary stability (SS) after ossseointegration using RFA, and to investigate the relationship between implant stability and cortical bone thickness. Methods: In total, 113 patients who attended the Tohoku University Hospital Dental Implant Center were included in this study. A total of 229 implants were placed in either the mandibular region (n=118) or the maxilla region (n=111), with bone augmentation procedures used in some cases. RFA was performed in 3 directions, and the lowest value was recorded. The preoperative thickness of cortical bone at the site of implant insertion was measured digitally using computed tomography, excluding cases of bone grafts and immediate implant placements. Results: The mean implant stability quotient (ISQ) was $69.34{\pm}9.43$ for PS and $75.99{\pm}6.23$ for SS. The mandibular group had significantly higher mean ISQ values than the maxillary group for both PS and SS (P<0.01). A significant difference was found in the mean ISQ values for PS between 1-stage and 2-stage surgery (P<0.5). The mean ISQ values in the non-augmentation group were higher than in the augmentation group for both PS and SS (P<0.01). A weak positive correlation was observed between cortical bone thickness and implant stability for both PS and SS in all cases (P<0.01). Conclusions: Based on the present study, the ISQ may be affected by implant position site, the use of a bone graft, and cortical bone thickness before implant therapy.

• Journal of Periodontal and Implant Science
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• 제45권6호
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• pp.238-246
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• 2015

Purpose: The purpose of this study was to evaluate bone formation around recombinant human bone morphogenetic protein (rhBMP-2)-coated implants placed with or without absorbable collagen sponge (ACS) in rabbit maxillary sinuses. Methods: The Schneiderian membrane was elevated and an implant was placed in 24 sinuses in 12 rabbits. The space created beneath the elevated membrane was filled with either blood (n=6) or ACS (n=6). In the rabbits in which this space was filled with blood, rhBMP-2-coated and non-coated implants were alternately placed on different sides. The resulting groups were referred to as the BC and BN groups, respectively. The AC and AN groups were produced in ACS-grafted rabbits in the same manner. Radiographic and histomorphometric analyses were performed after eight weeks of healing. Results: In micro-computed tomography analysis, the total augmented volume and new bone volume were significantly greater in the ACS-grafted sinuses than in the blood-filled sinuses (P<0.05). The histometric analysis showed that the areas of new bone and bone-to-implant contact were significantly larger in the AC group than in the AN group (P<0.05). In contrast, none of the parameters differed significantly between the BC and BN groups. Conclusions: The results of this pilot study indicate that the insertion of ACS after elevating the Schneiderian membrane, simultaneously with implant placement, can significantly increase the volume of the augmentation. However, in the present study, the rhBMP-2 coating exhibited limited effectiveness in enhancing the quantity and quality of regenerated bone.

• Archives of Plastic Surgery
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• 제39권3호
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• pp.209-215
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• 2012

Background : Among all facial fractures, nasal bone fractures are the most common, and they have been reduced by closed reduction (CR) for a long time. But several authors have reported suboptimal results when using CR, and the best method of nasal bone reduction is still being debated. We have found that indirect open reduction (IOR) through an endonasal incisional approach is a useful method for more accurate reduction of the nasal bone. Methods : A retrospective chart review was performed of 356 patients who underwent reduction of a nasal bone fracture in our department from January, 2006, to July, 2011. We treated 263 patients with IOR. We assessed patients' and doctors' satisfaction with surgical outcomes after IOR or CR. We evaluated the frequency of nasal bleeding owing to mucosal injury, and followed the surgical outcomes of patients who had simultaneous dorsal augmentation rhinoplasty. Results : According to the analysis of the satisfaction scores, both patients and doctors were significantly more satisfied in the IOR group than the CR group (P<0.05). Mucosal injury with nasal bleeding occurred much less in the IOR group (5.3%) than the CR group (12.9%). Dorsal augmentation rhinoplasty with IOR was performed simultaneously in 34 cases. Most of them (31/34) showed satisfaction with the outcomes. Conclusions : IOR enables surgeons to manipulate the bony fragment directly through the endonasal incisional approach. However, we propose that CR is the proper technique for patients under 16 and for those with comminuted nasal bone fractures because submucosal dissection in IOR can damage the growth or circulation of nasal bone.

• Clinics in Shoulder and Elbow
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• 제23권3호
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• pp.156-158
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• 2020

PHILOS plate fixation in osteoporotic proximal humerus fracture of old age is well-known for high complication rate, especially metal failure, providing various augmentation techniques, such as calcium phosphate cement, allogenous or autologous bone graft. We report a case of polymethyl methacrylate augmentation to provide appropriate reduction with a significant mechanical support. This can be a treatment option for displaced unstable osteoporotic proximal humerus fracture with marked bony defect.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제45권6호
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• pp.351-356
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• 2019

Maxillary sinus floor augmentation (MSFA) is an essential procedure for implant installation in the posterior maxillary area with vertical alveolar bone deficiency. For the past several decades, MSFA has been refined in terms of surgical methods along with technical progress, accumulation of clinical studies, and development of graft materials and surgical instruments. Although some complications in MSFA are inevitable in clinical situations, management of those complications in MSFA has been well established thanks to many clinicians and researchers. Nevertheless, some rare complications may arise and can result in fatal results. Therefore, clinicians should be well aware of such rare situations and complications associated with MSFA. In this review, the authors present several rare complications regarding MSFA, along with corresponding management strategies through a thorough review of the literature.