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Mini-microplate: Adoption of finite element model in order to evaluate a new plate design
Free oral communications 25 was 2-fold. First, whether mucosa could be expanded and second, expansion of the mucosa during flap prefabrication. The Phase 1 study was carried out on 6 Hanford minipigs. A buccal mucosa graft was harvested from cheek and divided into several 1 x 1 cm square 'postage grafts'. The grafts were applied to both the deep fascia and the galea with a 5-15 mm distance between them. They were then excluded from raw area by a silicon sheet. Between 2 and 7 weeks after the initial grafting, the skin flap was re-elevated and the mucosa grafts examined both macroscopicalty and histologically. The initial mucosa harvest was a mean 6.32 cm~ and the mean area of the mucosal lining of the flap was 11.67 cm 2. The increased surface area was 33% after 12 days and 110% at post grafting in the 7th week. The Phase 2 study was established to apply this mucosa expansion to a mueosa lined free flap prefabrication for intraoral defect reconstruction. Three adult dogs were studied. The left groin flap was elevated based on deep circumflex iliac artery. 2 x 4 cm buccal mucosa graft was taken, divided into postage stamp grafts, and the edges were marked with India ink. The grafts were then sutured underneath the flap with a distance of 1 cm between them. Marlex mesh was placed on the flap donor site to prevent the raw surface from healing. Three weeks later, the flap was harvested on deep circumflex artery. The surface area of the mucosal lining was calculated with a transparent sheet and a full thickness biopsy was taken from flap. The DCI artery mucosa lined free flaps were transferred to composite cheek defects that included skin, subcutaneous tissue and mucosa. All the flaps survived. However, one animal had mucous drainage from the flap area prior the transfer, The mucosal grafts were found to have increased their surface area by a mean of 25%, Histologic examination revealed new mucosa formation between the old mucosal stamp grafts. This study has shown that mucosa will increase in size on the undersurface of skin. This allows the formation of a composite flap, which can be transferred by microsurgical technique to successfully construct full-thickness cheek defects in the dog. The potential of this is considerable.
Mini-Microplate: Adoption of Finite Element Model in Order to Evaluate a New Plate Design Carta M J, Righi E. 1, Bruzzone A.A. 2, Lonardo P.M. 2, Marinaro E.~, Pastorino A. ~
1Department of Maxillo-Facial Surgery, EO Ospedali Galliera, Genoa, Italy 2Department of Production Engineering, University of Genoa, Genoa, Italy 3Department of Pathological Anatomy and Histopathology, EO Ospedali Galliera, Genoa, Italy In a previous paper, the authors indicated the results of an experimental analysis conducted on titanium miniplates subject to shearing loads. The experimental evidence, the microscopic data and computer models suggest that the area of the plate subject to most stress is the nearest to the osteotomic line. A new plate design, therefore, is needed in which miniplate structure is used to redesign the plate area proximal to the bone section and microplate structure is used to redesign the distal portion. The agreement between the experimental data and the computed results obtained in the previous analysis suggested to adopt a finite element model to evaluate the new plate design shearing loads and elastoplastic deformations are assumed.
Open Surgical Treatment of Temporo-Mandibular Disorders: Long-Term Results of a Personal Technique Caseone P., Di Paoio C., Spallaceia F., Panti F.
Department of Maxillofacial Surgery, University of Rome La Sapienza, Rome, Italy Temporomandibular disorders represent one of the most common pathology observed in outpatients at the Department of Maxillofacial Surgery at University of Rome La Sapienza. The patients with structural non-reversible alteration of the TMJ components undergo open surgery. Since 1988, arthroscopy of the upper compartment, condylar shaving, disk repositioning and lateral ligament plasty are the 'one-step' surgical procedure used routinely for condilar-disk incoordination. Clinical, radiological and kinesiographic pre- and postoperative findings have been analyzed. Surgical management problems and postoperative complications are reported and discussed. The authors report the long-term follow-up of this therapeutic procedure.
Morpho-Functional Long-Term Results in Rigid External Fixation of the Mandibular Condyle Fractures Cascone P., Govoni F.A., Rivaroli A., Dei Deo V.
Department of Maxillofacial Surgery, University of Rome La Sapienza, Rome, Italy The surgical treatment of the mandibular condyle fractures has always been considered a controversial subject in maxillofacial surgery. The aims of the open treatment are the anatomic restoration of the mandible and the functional rehabilitation of the temporomandibular joint, The authors present their experience with a new device specifically designed for the surgical reduction and the rigid external fixation of the fractures of the mandibular condyle, They report the long-term follow-up results obtained on a sample of 28 cases of dislocated condylar fractures with luxation of the condylar head out of the glenoid fossa. Clinical, radiologic and kinesiographic pre- and postoperative findings have been analyzed to evaluate the anatomical changes that occurred to the repositioned condyles and the function of the operated temporomandibular joints. Surgical management problems and postoperative complications are reported and discussed. The results of this study demonstrate that the advantages of this new technique of rigid external fixation, such as the low-grade injury reduction of the dislocated condylar head and the immediate postoperative mobilization of the traumatized joint, can contribute significantly to improve the anatomical and functional process of articular rehabilitation.
The Use of Titanium Mesh in Orbital Wall Reconstruction: Our Experience CasteUani A.
Department of MaxillofaciaI Surgery, Spedali Civili di Brescia, Brescia, Italy Reconstruction of orbital walls is necessary after: (i) bone fractures, (ii) demolition of one or more orbital parts in ontological surgery, and (iii) bone replacements in craniofacial surgery, The main objective of the surgeon must be
Mini-Microplate: Adoption of Finite Element Model in Order to Evaluate a New Plate Design Carta M J, Righi E. 1, Bruzzone A.A. 2, Lonardo P.M. 2, Marinaro E.~, Pastorino A. ~
1Department of Maxillo-Facial Surgery, EO Ospedali Galliera, Genoa, Italy 2Department of Production Engineering, University of Genoa, Genoa, Italy 3Department of Pathological Anatomy and Histopathology, EO Ospedali Galliera, Genoa, Italy In a previous paper, the authors indicated the results of an experimental analysis conducted on titanium miniplates subject to shearing loads. The experimental evidence, the microscopic data and computer models suggest that the area of the plate subject to most stress is the nearest to the osteotomic line. A new plate design, therefore, is needed in which miniplate structure is used to redesign the plate area proximal to the bone section and microplate structure is used to redesign the distal portion. The agreement between the experimental data and the computed results obtained in the previous analysis suggested to adopt a finite element model to evaluate the new plate design shearing loads and elastoplastic deformations are assumed.
Open Surgical Treatment of Temporo-Mandibular Disorders: Long-Term Results of a Personal Technique Caseone P., Di Paoio C., Spallaceia F., Panti F.
Department of Maxillofacial Surgery, University of Rome La Sapienza, Rome, Italy Temporomandibular disorders represent one of the most common pathology observed in outpatients at the Department of Maxillofacial Surgery at University of Rome La Sapienza. The patients with structural non-reversible alteration of the TMJ components undergo open surgery. Since 1988, arthroscopy of the upper compartment, condylar shaving, disk repositioning and lateral ligament plasty are the 'one-step' surgical procedure used routinely for condilar-disk incoordination. Clinical, radiological and kinesiographic pre- and postoperative findings have been analyzed. Surgical management problems and postoperative complications are reported and discussed. The authors report the long-term follow-up of this therapeutic procedure.
Morpho-Functional Long-Term Results in Rigid External Fixation of the Mandibular Condyle Fractures Cascone P., Govoni F.A., Rivaroli A., Dei Deo V.
Department of Maxillofacial Surgery, University of Rome La Sapienza, Rome, Italy The surgical treatment of the mandibular condyle fractures has always been considered a controversial subject in maxillofacial surgery. The aims of the open treatment are the anatomic restoration of the mandible and the functional rehabilitation of the temporomandibular joint, The authors present their experience with a new device specifically designed for the surgical reduction and the rigid external fixation of the fractures of the mandibular condyle, They report the long-term follow-up results obtained on a sample of 28 cases of dislocated condylar fractures with luxation of the condylar head out of the glenoid fossa. Clinical, radiologic and kinesiographic pre- and postoperative findings have been analyzed to evaluate the anatomical changes that occurred to the repositioned condyles and the function of the operated temporomandibular joints. Surgical management problems and postoperative complications are reported and discussed. The results of this study demonstrate that the advantages of this new technique of rigid external fixation, such as the low-grade injury reduction of the dislocated condylar head and the immediate postoperative mobilization of the traumatized joint, can contribute significantly to improve the anatomical and functional process of articular rehabilitation.
The Use of Titanium Mesh in Orbital Wall Reconstruction: Our Experience CasteUani A.
Department of MaxillofaciaI Surgery, Spedali Civili di Brescia, Brescia, Italy Reconstruction of orbital walls is necessary after: (i) bone fractures, (ii) demolition of one or more orbital parts in ontological surgery, and (iii) bone replacements in craniofacial surgery, The main objective of the surgeon must be