Conservative treatment of extensive keratocyst odontogenic tumor

Abstracts Conclusions: The one case out of 62 to have osteonecrosis will be described. This is a higher incidence of ONJ than previously described; this in turn highlights the need for continual oral examination of patients receiving Avastin chemotherapy. Conflict of interest: None declared. doi:10.1016/j.ijom.2011.07.1011 44 Conservative treatment of extensive keratocyst odontogenic tumor G. Florez Maxillofacial Phatology, Cayetano Heredia Peruvian University, Lima, Peru Keratocyst Odontogenic Tumor (KCOT) is a benign intraosseus neoplasm that occurs between the second and third decade of life. The main location is the third molar and angle region of the mandible and could extend towards the ramus or body. Its importance lies in the high rate recurrence, understanding histological variants allow predict prognosis and tumor aggressiveness. To reduce the high recurrence rate of KCOT, it is essential to eradicate the epithelial component of the cyst completely, occasional association with basal cell nevus syndrome. However, radical treatment is associated with numerous complications, including facial deformity, missing teeth, infection of transplanted bone, and permanent numbness of the region innervated by the mental nerve when OKC involves the inferior alveolar nerve. Among the surgical conservative treatments include marzupialization or decompression, but according to the literature does not rule out the possibility of more aggressive treatments such as partial or total removal of the mandible. We report a case of 59 years old female patient, who present a growing overinfected intraosseus right mandibular KCOT. She was treated by marzupializion. Further, the decreased tumor was completely removed. No recurrence and new bone formation was observed in 1 year. Conflict of interest: Conservative treatment of extensive KOCT by marzupialization.

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calibration spheres were used but no facial support was needed. Radio-opaque spheres transferred the true horizontal that was determined clinically for each patient just before the image was taken. Conclusion: It is possible to obtain 3D images that are correctly oriented, calibrated and that accurately reproduce a spacial reference such as the true horizontal, as well as not altering the soft tissues, with is necessary in order to integrate these images with the clinical photographs of the patient. Conflict of interest: None declared. doi:10.1016/j.ijom.2011.07.1013 46 Genioplasty: techniques and functional and esthetic considerations ˜ A. Diaz ∗ , R. Munoz, J. Golaszewski, F. Chirinos Carabobo University, Valencia, Venezuela Dentofacial deformities are commonly associated with the chin area when it is inappropriate in size, shape and position. When three-dimensional facial analysis is made, the chin becomes an important part within the same since it can significantly alter the symmetry, balance, and facial shape. The genioplasty was first described by Hofer in 1942 and has had multiple changes through the years by multiple authors such as Converse, Trauner, Obwegeser, Reichebach, Neuner, Epker among others. It is a surgical procedure that through different techniques can descend, reduce, advance or retract the projection of the chin. This technique is helpful in the treatment of dentofacial deformities due to its versatility and different techniques. In experienced hands the risks are almost non-existent and can improve the normal symmetry and harmony of the face. Therefore in this research the different techniques will be presented as well as its aesthetic and functional considerations in the treatment of dentofacial deformities and the submission of multiple clinical cases where we have used different techniques described as well as modifications of these techniques. Conflict of interest: None declared. doi:10.1016/j.ijom.2011.07.1014

doi:10.1016/j.ijom.2011.07.1012 Topic: Orthognathic and Aesthetic Surgery 45 Using 3D imaging in the treatment planning of orthognathic patients

47 Minimally invasive surgically assisted rapid palatal expansion with limited approach under sedation: a report of 335 cases F. Hernández-Alfaro 1,2,∗ , J. Mareque-Bueno 2 , R. GuijarroMartinez 2 , J. Gimeno-Medina 2 1

X.N. Toledo 1,∗ , J.V. Ruiz 2 1

Ortodoncia y Ortopedia Dentomaxilar, Universidad de Chile, Chile 2 Orthodontics, ICOR, Santiago, Chile The Cone Beam computerized tomography system (CBCT) is used worldwide by medical and dental professionals. The purpose of this system is to correct distortions in the orientation of the tomographic images obtained so that the diagnosis and treatment plan is determined with greater precision. Objective: Integrate 3D imaging to the protocol study and treatment planning for orthognatic patients. Materials and method: 3D images taken with a Kodak 9500D Cone Beam with the patient in natural head position. Image size

Oral and Maxillofacial Surgery, Universitat Internacional de Catalunya, Spain 2 Oral and Maxillofacial Surgery, Teknon Medical Center, Barcelona, Spain An adequate transverse maxillary dimension is one of the critical aspects of a functional and stable occlusion. SARPE consists of a surgical liberation of the sites of resistance combined using orthopedic forces. Most technical descriptions advocate the use of general anesthesia with hospital admission. Object: The aim of this paper is to present our ten year experience with a minimally invasive, limited approach for Surgically Assisted Rapid Palatal Expansion. Methods: Between March 2000 and December 2010, SARPE was performed on 335 consecutive cases with transverse skeletal