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0.05).CONCLUSION: The PRF-mixed group showed more bone formation than the porcine cancellousbonegroup (TS-GBB), butthere was a no significant difference. The PRF may not lead to enhanced bone healing when grafted with the porcine cancellous bone.
Assuntos
Animais , Coelhos , Regeneração Óssea , Fibrina , Osteogênese , Crânio , Transplante Heterólogo , TransplantesRESUMO
A calcifying epithelial odontogenic tumor (CEOT) was first described as a separate entity in 1955 by Pindborg, and has since been referred to as Pindborg tumor. CEOT is characterized by the presence of squamous-cell proliferation, calcification and amyloid deposits, and accounts for only 1% of all odontogenic tumors. CEOT is a benign, though occasional locally invasive, slow-growing neoplasm. It is located either intraosseously or extraosseously, and is usually associated with an unerupted permanent tooth. A 24 year-old female visited our clinic, presenting with a palatal swelling and intra-oral ulcer. After an incisional biopsy, the lesion was confirmed to be odontogenic tumor. A tumor resection and reconstruction surgery with tongue flap were performed.
Assuntos
Feminino , Humanos , Biópsia , Neoplasias Maxilomandibulares , Tumores Odontogênicos , Palato , Placa Amiloide , Neoplasias Cutâneas , Língua , ÚlceraRESUMO
Maxillary sinus lift and bone graft are used to reconstruct atrophic maxilla molar area for endosseous dental implants. Many different grafting materials and techniques can be used for maxillary sinus bone graft. Bio-Oss(R) has been proposed as bone substitute and successfully utilized as osteoconductive filler. Platelet rich plasma (PRP) is an autologous material with many growth factors, such as PDGF, TGF-beta, IGF, VEGF, facilitating bone healing process. And Platelet poor plasma (PPP) is the by-product in procedure of producing PRP. Six rabbits were used as experimental animal. Both maxillary sinus were grafted with Bio-Oss(R) and PRP, and Bio-Oss(R) and PPP. Rabbits were sacrificed at 4, 8 and 12 weeks. The grafting sites were evaluated by histomorphometric analysis. As a result, using PRP showed excellent bone formation in the early stage, but no further significant effect after that. In late stage, the ability of bone formation of using PRP was even worse than using PPP. The further studies need to be considered in this case.
Assuntos
Animais , Coelhos , Plaquetas , Substitutos Ósseos , Implantes Dentários , Peptídeos e Proteínas de Sinalização Intercelular , Maxila , Seio Maxilar , Dente Molar , Osteogênese , Plasma , Plasma Rico em Plaquetas , Fator de Crescimento Transformador beta , Transplantes , Fator A de Crescimento do Endotélio VascularRESUMO
Assuntos
Animais , Humanos , Camundongos , Gordura Abdominal , Tecido Adiposo , Células-Tronco Adultas , Fosfatase Alcalina , Anestesia Local , Biologia , Osso e Ossos , Medula Óssea , Regeneração Óssea , Cálcio , Durapatita , Ensaio de Imunoadsorção Enzimática , Células-Tronco Mesenquimais , Camundongos Nus , Microscopia de Fluorescência , Osteoblastos , Osteocalcina , Osteócitos , Osteogênese , Osteopontina , Células-Tronco , Células EstromaisRESUMO
Assuntos
Animais , Ratos , Osso e Ossos , Medula Óssea , Regeneração Óssea , Hidrogéis , Hidrogéis , Células-Tronco Mesenquimais , Osteoblastos , Osteogênese , Poliésteres , Polietilenoglicóis , TransplantesRESUMO
Assuntos
Adulto , Humanos , Adipócitos , Tecido Adiposo , Células-Tronco Adultas , Fosfatase Alcalina , Anestesia Local , Biologia , Medula Óssea , Contagem de Células , Condrócitos , Colágeno Tipo I , Durapatita , Sialoproteína de Ligação à Integrina , Lipectomia , Células-Tronco Mesenquimais , Microscopia de Fluorescência , Mioblastos , Osteoblastos , Osteocalcina , Osteócitos , Osteogênese , Células-Tronco Pluripotentes , Células-Tronco , Engenharia TecidualRESUMO
PURPOSE: This study was done to know the usefulness of fractal analysis when evaluating the radiologic changes after decompression on jaw bone cystic lesions using fractal analysis. MATERIALS AND METHODS: 30cases of cystic lesions were followed up after decompression. Panoramic image was used to observe radiologic changes around the cystic lesion. The part of the panoramic image which showed radiologic change was defined as region of interest(ROI); The fractal dimension of the ROI was calculated using box-counting method. RESULTS: Using sign-rank test, there was a statistically significant difference in fractal dimensions after decompression therapy(P<;0.0001). The fractal dimensions statistically increased after decompression(the median of D:0.12). CONCLUSIONS: The ROI after decompression showed higher fractal dimensions which offer the objective proof of the bone healing around cystic lesions after decompression treatment.
Assuntos
Cistos Ósseos , Descompressão , Fractais , Arcada OsseodentáriaRESUMO
Assuntos
Animais , Humanos , Camundongos , Ratos , Regeneração Óssea , Encéfalo , Tecido Conjuntivo , Matriz Extracelular , Fibronectinas , Células-Tronco Mesenquimais , Camundongos SCID , Camundongos Transgênicos , Modelos Animais , Neurônios , Osteoblastos , Osteogênese , Publicações , Células-Tronco , Doadores de TecidosRESUMO
Assuntos
Cádmio , Linhagem Celular , Linhagem Celular Transformada , Sobrevivência Celular , Cromo , Proteínas de Choque Térmico , Proteínas de Choque Térmico HSP27 , Íons , Chaperonas Moleculares , Osteoblastos , Osteogênese , TitânioRESUMO
Assuntos
Adulto , Humanos , Anestésicos , Anestésicos Locais , Arteríolas , Glicemia , Clínicas Odontológicas , Epinefrina , Glucose , Homeostase , Lidocaína , Refeições , Cirurgia BucalRESUMO
Assuntos
Animais , Humanos , Ratos , Aumento do Rebordo Alveolar , Durapatita , Fator VIII , Adesivo Tecidual de Fibrina , Fibrina , Fibrinogênio , Hemostasia , Polímeros , Pele , Espaço Subdural , Cirurgia Bucal , Suturas , Trombina , Adesivos Teciduais , Extração Dentária , Transplantes , CicatrizaçãoRESUMO
This study was to analyze the changes of levels of alkaline phosphatase before and after enucleation of jaw cysts combined with bone grafting, and to evaluate biochemically the effectiveness of the early detection of bone healing and infection as a prognostic marker. Eighteen patients (13 males, 5 females) with cystic lesions of the jaws were divided into two groups. The bone graft group underwent enucleation and bone graft. The control group underwent only enucleation. Both groups were measured levels of ALP before surgery, and plus-minus 4 weeks postoperatively. The more discriminating results were obtained in the bone graft group. The results were as follows : 1. Levels of ALP after enucleation of jaw cysts were decreased in all patients with and without bone graft. 2. The bone graft group showed more marked decrease in variation of levels of ALP than the control group.(p=0.008) This should be considered as a result of increased osteoblastic activity and new bone formation. 3. Such variation could be used as a prognostic marker for bone healing after cyst operation. In the cost/benefit ratio, measurement of ALP activity could be useful as a convenient procedure in routine clinical practice.
Assuntos
Humanos , Masculino , Fosfatase Alcalina , Transplante Ósseo , Cistos Maxilomandibulares , Arcada Osseodentária , Cistos Odontogênicos , Osteoblastos , Osteogênese , TransplantesRESUMO
Bone grafts are widely used in the reconstruction of osseous defects in the oral and maxillofacial region. Autogenous bone grafts are considered the gold standard in grafting of the oral and maxillofacial region, because of its osteoconductive and osteoinductive properties. Mandibular symphysis & ascending ramus bone graft have been used more frequently because of easy surgical access, reduced operative time, and following minimal morbidity. However, even though the frequent use of the anterior part of ascending ramus and the different regions of mandible, rare of the reports provide information about the quantity of bone available in this donor site. So this study was taken to evaluate & quantify the amount of bone graft material in the anterior ascending ramus regions. This study was made on 36 samples of CT image. In 3D volume image, imaginary osteotomy & segmentation were done and the dimensions and volume of the bone grafts were measured and evaluated. the average volume of the graft materials obtained from the ascending ramus was 3656.83+/-108.19mm3, and the average dimensions of graft materials were (33.68+/-0.48)x(34.92+/-0.51)x(15.96+/-0.27)x(9.05+/-0.27)mm.
Assuntos
Humanos , Autoenxertos , Transplante Ósseo , Mandíbula , Duração da Cirurgia , Osteotomia , Doadores de Tecidos , TransplantesRESUMO
No abstract available.
RESUMO
Assuntos
Humanos , Anormalidades Congênitas , Deformidades Dentofaciais , Estética , Lábio , Nariz , Cirurgia Ortognática , Osteotomia , Prognóstico , Estudos RetrospectivosRESUMO
Assuntos
Animais , Cães , Humanos , Absorção , Celulose , Celulose Oxidada , Odontologia , Inflamação , Arcada Osseodentária , Mandíbula , Maxila , Membranas , Osteogênese , Periósteo , Pesquisadores , TíbiaRESUMO
The purpose of this study is to find the histopathological pattern of cysts. We reviewed the hospital chart, out-patient chart, roentgenogram, histopathologic report and operation report of 152 patients who had been diagnosed as cyst and treated at the department of Oral and Maxillofacial Surgery of Korea university hospital between Jan. 1, 1995 and Dec. 31, 1998. And then we studied clinically with regard to pathological classification, age and sex distribution, anatomical distribution and so on. The results were as follows : 1. In pathologic classification, radicular cyst (97cases, 64%), dentigerous cyst (35cases, 23%), odontogenic keratocyst (8cases, 5.3%) were dominant among cases of cyst. 2. The pattern of age distribution in cases of radicular cyst, dentigerous cyst and odontogenic keratocyst was similar to that found in previous studies. The peak incidence was in the second decade (27%) and third decade (29%) in overall cases. 3. The male-to-female ratio was 1.9 : 1. 4. Radicular cyst occured most frequently in the maxillary incisor teeth area, dentigerous cyst in mandibular wisdom teeth area, and odontogenic keratocyst in mandibular molar area.
Assuntos
Humanos , Distribuição por Idade , Classificação , Cisto Dentígero , Incidência , Incisivo , Arcada Osseodentária , Coreia (Geográfico) , Dente Molar , Dente Serotino , Cistos Odontogênicos , Pacientes Ambulatoriais , Cisto Radicular , Distribuição por Sexo , Cirurgia Bucal , DenteRESUMO
0.05) postoperatively. 3. In the facial index, hard tissue decreased(0.23+/-2.21%), but soft tissue increased(2.41+/-3.46%) with statistical significance. CONCLUSION: One of the main purpose of orthognathic surgery is to achieve facial esthetics and harmony. In order to fullfill this purpose, it is important to carry out a precise presurgical treatment planning by estimating the changes of frontal profile after surgery.
Assuntos
Humanos , Masculino , Deformidades Dentofaciais , Estética , Má Oclusão , Mandíbula , Cirurgia Ortognática , Osteotomia Sagital do Ramo MandibularRESUMO