• Journal of Oral Medicine and Pain
• /
• 제32권4호
• /
• pp.413-419
• /
• 2007

다양한 종류의 정량적 통각검사들의 연관성을 알아보기 위하여 56 명의 측두하악장애 환자를 대상으로 측두근, 교근, 측두하악관절 부위, 그리고 경골근의 냉통각역치 (Cold Pain Threshold, CPT), 열통각역치 (Heat Pain Threshold, HPT), 열통증인내역치 (Heat Pain Tolerance Threshold, PTT), 압력통각역치 (Pressure Pain Threshold, PPT)를 측정하였으며, 각기 다른 통각 역치 간의 상관관계와 측정 부위 별 통각 역치 간의 상관 관계를 분석하였다. CPT, HPT, PTT를 포함한 온도통각역치의 성별간 차이는 나타나지 않았다. 그러나 PPT는 여성이 남성에 비하여 모든 부위에서 유의하게 낮은 역치를 나타내었다. CPT, HPT, PTT를 포함한 세 가지의 온도통각역치들은 모든 측정 부위에서 약정도에서 강정도 (mild to high)의 상관관계를 나타내었다 (r= 0.324-0.754, p<0.05). PPT 값은 각각의 온도통각역치와 통계적으로 유의한 상관관계를 나타내지 않았다. 모든 측정 부위의 통각역치값들은 서로간에 약정도에서 강정도 (mild to high)의 상관관계를 나타내었다 (r= 0.284-0.878, p<0.05). 측두하악장애 환자의 온도통각역치와 열통각인내역치 사이에는 유의한 상관관계가 존재하나 온도통각역치와 압력통각역치 간에는 상관관계가 나타나지 않는 것이 관찰되었으며, 각기 다른 부위에서 측정된 통각역치 간에는 비교적 높은 상관관계가 나타났다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제34권3호
• /
• pp.383-387
• /
• 2008

The calcifying odontogenic cyst(COC) is considered to occupy a position between a cyst and an odontogenic tumor-having charateristics of both. Gorlin and col. described the COC for first time as an own pathological entity in 1962. Clinically, the COC represents 1% of the odontogenic lesion. It is possible to be found from the first decade to the eight decade but is more frequent during the second decade. It affects in same proportion the maxilla and jaw, being the most in tooth-bearing area of the jaw. This case of COC associated with an unerupted tooth which appeared in the right mandible of 22-year-old woman, was reported. This case report is to present a review of the literature relates to this case of COC and its treatment, discuss clinical, radiographic, histological and therapeutic aspects.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제34권3호
• /
• pp.300-305
• /
• 2008

Purpose: The purpose of our study was to evaluate the volume of pre- and post operative masseter muscle and bite force in mandibular prognathic patients treated with SSRO with the use of the 3D CT imaging technique and occlusal force meter. Materials and methods: The study group consisted of 12 patients with mandibular prognathism (5 males and 7 females) who underwent mandibular setback surgery (BSSRO) in the Department of Oral and Maxillofacial Surgery, Samsung medical center. Bite force was measured at pre op, post op 3, 6 and 12 months by occlusal force meter(GM10, Nagano Keiki, Japan) The preoperative CT examination of subjects was performed between one month prior to operation and one year after to operation. And muscle volume was measured. Result: As compared to preoperative measurements at 1 year postoperatively the masseter & internal pterygoid muscle volume were diminished (p<0.05) The bite force steadily recovered, so at postoperatively 6 months reached the preoperative level. And at 1 year after operation, the maximum bite force was significantly greater than preoperative levels. No significant correlation was presented between masseter muscle and bite force (p>0.05), internal pterygoid muscle and bite force (p>0.05). Conclusion: In this study, the results showed that volume and bite force of the masticatory muscles decreased significantly immediate after orthognathic surgery for mandibular set-back. However, reduction of maximum bite force disappears within 6 months after surgery.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제17권2호
• /
• pp.137-152
• /
• 1995

This study was designed to evaluate the bone formation capability of the bone substitute when compared with autogenic bone, freeze-dried demineralized allogeneic bone and bioglass into parietal bone of the rats. We made the parietal bone defects in $7{\times}7mm$ size on rats and has performed the bone graft in each experimental groups. Postoperatively 1, 2, 4, 6, 8, weeks, each specimen stained with H & E, Masson's trichrome methods. We evaluated the osteogensis capability in each groups. The result were as follow : 1. Inflammatory cell infiltration approached at 1 week and disappeared at 4 weeks in all experimental group, expecially severe in freeze-dried demineralized allogeneic bone group. 2. New capillry proliferation was increased in autogeneic bone graft group than any other groups and was increased till 2 weeks and decreased in freeze-dried demineralized allogeneic bone group and was few in bioglass group. 3. Osteoblastic activity increased in autogeneic bone and freeze-dried demineralized allogeneic bone groups till 4 weeks, and decreased in 6 weeks which no difference between these groups. But, few occurred in bioglass group till 6 weeks. 4. Initial osteoclastic activity was prominent in freeze-dried demineralized allogeneic bone group and few in autogeneic bone group. 5. New bone formation bega at 1 week in autograft and freeze-dried demineralized allogenic bone groups, but, mild new bone formation at 8 weeks in bioglass.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제17권2호
• /
• pp.109-129
• /
• 1995

Many patients with malignancies of the head and neck undergo radiation therapy, either as the only method of treatment or in combination with surgery. Radiation therapy has great effect in the case of fairly advanced malignancies which can't be operated radically. But the complication of radiation therapy arise because of damage to the peri- and operated area. It is fully known that irradiated tissue shows retarded healing process in the skin, mucosa and especially vascuslar tissue. The purpose of this study was to observe the healing process of irradiated free or island flap after operation. As Experimental Models, Femoral arterial and venous anastomosis (Group 1), Epigastric-island flap (Group 2) and free Epigastric falp(Group 3) with irradiated postoperative 24 hrs were made on 30 rats/group. As Control Model(Group 4), Free Epigastric flap was not irradiated after operation was chosen on 30 rats. The amount of irradiation was single fraction of 20 Gy using as linear megavoltage accelerator. Difference between Experimental and Control group was evaluated by the method of clinical examination, histopatholoical findings, biochemical analysis and DNA activity at postoperative 1, 3, 7, 14 and 28 days. The results were as follows, 1. Skin color and new epithelization in group 2 and 3 was similar to control group clinically. 2. Postoperarive patency of femoral artery and vien showed 5% and 22% of ischemity. 3. The externa, media and intima of irradiated femoral artery and vein were similar to control group histopathlogically. 4. Granulation and collagen tissue accumulation of irradiated groups were more active due to degenerative and fibrotic changes than control group at postoperative 7 days histopathologically. 5. The hydroxyproline content of all experimental groups were reduced till 14 days and the group 2 was most prominent at postoperative 7 and 28 days(p<0.05). 6. DNA activities of all groups were reduced till 3 days, but begun to recover at 7 days and more activities in control group than irradiated group(p<0.05). Based on the above results, the clinical healing process of free flaps with irradiated postoperative 24 hrs little difference from control group without complications.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제15권1호
• /
• pp.49-61
• /
• 1993

The transplantation of cartilage, especially auricular cartilage, has assumed a role of importance in the field of plastic and reconstructive surgery. From long years ago, many reports have appeared in the literature describing the experimental and clinical results of the use of cartilage. At present, the evidence for survival of autograft of cartilage is admitted, But, the results for interrelationship between the bone and cartilage grafts with or without perichondrium is not so conclusive. The purpose of this study were observed as to whether autogenous cartilage grafts were fixed by means of tie with 4-0 vicryl and fibrin adhesive on the femur or microscopic findings of union state in 16 rabbits. We sacrified the experimental animals after 1, 2, 4, 6 weeks postoperatively and made the specimens as a routine laboratory procedures and stained with Hematoxylin-Eosin stain, Verhoeff-van Gieson elastic fiber stain, and alcian blue periodic acid-Schiff(AB-PAS) for mucopolysaccharide. Histologic evaluation was performed under microscope. The obtaind results were as follows : 1. Fibrous union was formed between the grafting cartilage and the femur, nor any findings of calcification and formation of new bone. 2. Partial fibrous adhesion was observed in fibrin adhesive groups on 6 weeks postoperatively. 3. Appositional growth has performed more in fibrin adhesive groups than tie groups. 4. There are little difference in both for new copillary proliferation and fibroblast activations. 5. Degenerative changes have apperared more in tie groups than adhesive groups, but not related to the healing periods.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제15권1호
• /
• pp.11-20
• /
• 1993

Bony ankylosis is an intraarticular condition where there is fusion of the bony surfaces of the joint : The condyle and the glenoid fossa. It occurs in both children and adults, unfortunately more frequently in the former, in whom early recognition and correction is particularly critical. Trauma is well proven to be the predominant cause of TMJ ankylosis. Infection, rheumatoid arthritis and neoplasm are another, significant cases of TMJ ankylosis. The necessity for using an interpositional material to prevent TMJ reankylosis has been widely discussed and many interpositional materials have been used, including temporal muscle and fascia, dermis, auricular cartilage, fascia lata, fat, Lyo-dura, Silastic and various metals. The temporal muscle and fascia have been widely used pedicled flap for head and neck reconstruction. The use of a temporal muscle and fascia for reconstruction of the TMJ, particularly in cases of ankylosis is a very reasonable option. Its principle advantages are its autogenous nature, resilience, and proximity to the joint, allowing for a pedicled transfer of vascularized tissue into the joint area. However, the viability of temporal muscle and fascia is a critical question. We treated 2 cases of TMJ ankylosis with temporal muscle and fascia transfer and one case with temporal fascia. We obtained satisfactory results as to functional aspects.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제20권3호
• /
• pp.241-245
• /
• 1998

The plunging ranula or cervical ranula is amucous extravasation cyst of the sublingual gland. It is slightly common in females, shows no side preference, and is more prevalent in the second and third decades of life. It typically manifests as a painless, nonmobile swelling in the neck. The pathogenesis of plunging ranula is the discontinuities of the mylohyoid muscle in a position that would allow extravasation of sublingual gland mucin. The histologic appearance is characteristically of a cyst, devoid of epithelium or endothelium, with a vascular fibro-connective tissue wall containing some chronic inflammatory cells and macrophages stuffed with mucin. The correct diagnosis is essential for the most effective treatment, which is exicision of the sublingual gland. The plunging ranula must be differentiated clinically and histomorphologically from thyroglossal duct cyst, dermoid cyst, branchogenic cyst, lymphangioma, laryngocele, lipoma, hemangioma, cervial thymic cyst, cysts of the parathyroid or thyroid gland, lymphadenopathy, abscess, or tumor. We report a case and review the literatures, in our case, 23-year old man were diagnosis as plunging ranula after have been taken sialogam, MRI, etc. He underwent surgery via a cervical approach. The ranula reached the anterior neck by passing through a dehiscence in the mylohyoid muscle. A pseudocyst was extirpated. Although total sublingual gland excision was not performed, no recurrence was observed during 6 months follow-up periods.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제12권3호
• /
• pp.34-41
• /
• 1990

The pilomatricoma (calcifying epithelioma of Malherbe) is rare benign hard, spherical and freely movable cutaneous tumor, which was differentiated from hair cells, particulary hair cortex cells. It is usually occured as a single, asymptomatic, 0.5 cm to 3.0 cm sized, deep seated, firm nodule, covered by normal or pink skin. It arises chiefly in young people, including children, and most often in the head, neck and upper extrimites. The authers experienced a case of pilomatricoma which occured in preauricular region. This case was summarized as follows. 1. 10 years old female has suffered from hard subepidermal mass on preauricular area and she visited our out patient clinic. So we performed surgical extirpation and the excised specimen was pathologically examined. 2. Grossly the tumor measures 2.0 cm in diameter and firm, bosselated, spherical shaped which covered by a thin layer of fibrous tissue. On cut section, it shows spicular gritty surfaces, well encapsulation, interwoven and keratotic lamellae. 3. Histopathologically, the epithelial masses of the tumor are composed of two type of cells, basophilic cells and shodow cells. The basophilic cells resemble hair matrix cells which posses round or elogated, deeply basophilic nuclei and scanty cytoplasm. The shadow cells show a central, unstained shadow at the site of the lost nucleus. Gradual development of basophilic cells into shadow cells can be observed. Foci of calcification are present within the lobule of shadow cells. The stroma of the tumor shows a considerable foreign body giant cell reaction adjacent to the shadow cells. 4. No recurrence was observed until post-operative 40 months.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제16권1호
• /
• pp.33-42
• /
• 1994

본교실에서는 심한 하악골 전동증 환자 5례에서 Obwegeser II method와 과두 위치 보존술 및 견고한 골간 고정을 상요하여 추적조사결과 다음과 같은 결과를 얻었다. 1. Obwegeser II method는 15mm이상의 하악골 후방이동이 요구되거나 심한 개교합의 외과적교정시에 원심골편을 수동적으로 이동시킬 수 있는 방법이라 판단된다. 2. 술후 하악과두의 위치 변화가 많은 증례 V에서 술직후 비교적 많은 재발을 경험하였다. 3. 하악과두위치의 보존과 견고한 골간고정을 통하여 악간고정기간의 단축과 술후 안정성 및 심미적 기능적 개선을 얻었다.