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rom this is make supplementary tests toonfirm it. The location of metastases inhe region molar and premolar mandibu-ar, may be due to a greater amount ofedullar bone and vascularization. Kid-
ey tumors in clear cell from the bark,eoplasms are morphologically similar tohe hypernephromas, clear cell carcino-
as, carcinomas of glandular cells andell carcinomas sarcomatoid, therefore, theistinction between benign neoplasms andalignant, primary tumors and metastases
equire expertise on the part of the pathol-gist and the clinician. Treatment andrognosis vary depending on the primaryesion.
Conflict of interest: None declared.
oi:10.1016/j.ijom.2011.07.537
75
opic: orthognathic andesthetic surgery
orrection of maxillary verticalxcess with guided revert boneransport. A case report of a newurgical technique
.A. Hernandez 1,∗, J. Gonzalez Lugo 2,. Baralt 3, E. Manduca 2
Oral Surgery, Centro Nacional de Cirugiaucomaxilofacial CIBUMAXI, VenezuelaOrtodoncista CIBUMAXI, VenezuelaResidente CIBUMAXI, Centro Nacionale Cirugia Buco Maxilo Facial emplantes, Caracas, Venezuela
Introduction: 30 percent of craniofa-ial abnormalities on patients have verticalaxillary excess. This condition is usually
ccompanied with great teeth exposure,ummy smile and mandible clock rotation.he following technique is an alternative ofconventional osteotomy Le fort I and is
ased on the turnover of hard and soft tis-ues through a corticotomy with light andontinues forces by Niti coils and microim-lants.
Materials and methods: The selec-ion criterion of the patients was that allndividuals had a dental class I and verti-al maxillary excess between 5 and 7 mm.o determine these parameters, all patientsad extra and intra oral photos, X ray films.
After the initial selection of patients,hey were treated by an orthodontist whoid the initial aligning and leveling of teethrior to the surgery. The procedure was
one under sedation at an ambulatory carenit.Results and conclusions: Because ofhe simplicity and low mortality rate of this
procedure, it can be done with sedation andat an ambulatory care unit. The success rateof this technique has been successful onall cases treated. Furthermore, it has sev-eral advantages compared to conventionalosteotomies such as, reduced operatorytime, general anesthesia is not necessaryneeded, less bleeding and therefore thepostoperative discomfort is quite reducedas well as the high medical cost.
Conflict of interest: None declared.
doi:10.1016/j.ijom.2011.07.538
2763D analysis and surgicalorientation of severeantero-posterior disharmonies:determinant parameters andthreshold valuesJ.H. Faure 1,∗, A. Oueiss 1, J. Braga 2
1 Dento-Facial Orthopedics, France2 Laboratoire CNRS Anthropobiologie FR2960, University of Toulouse 3, Toulouse,France
Severe maxilla-facial disharmoniesneed a complete three dimensionalanalysis.
This conference describes resultsof a social program financed by theFrench National Medical Insurance aimedat improving identification, diagnosis,follow-up and treatment of surgicalcases. Participating orthodontists selecteda group of 312 “border line surgery”patients who profited of CT scan exams.This work compared two sub-samplesof patients with severe antero-posteriordisharmonies evoking surgical direction(40 Class II and 34 Class III) with areference sample (40 patients).
Patient’s CT scan data are treated byspecific softwares elaborated in Toulouseusing 14 maxillo-facial landmarks associ-ated with trigeminal anatomy, and inertiamatrices calculus to localize dental ele-ments. This cephalometric analysis is ableto describe the anatomy with three lev-els: alveolo-dental level/basic bones/globalarchitecture or envelop.
The most determinant parameters andthe threshold values are determined by sta-tistical methods.
The importance of different kinds ofparameters for surgical orientation can beclassified:1. Alveolo-dental parameters are more
important than basic bone or architec-
tural parameters.2. Upper/lower gaps parameters are moreimportant than position of whateveranatomical element.
Abstracts 1185
3. Anterior landmarks are always moreimportant than medium or posteriorones.
Beyond orthodontist’s comportmentanalysis, this work proposes an help forparameters selection and can give warninglights for surgical orientation.
The long term target was to definegood practice behavior and to encourageorthodontists to avoid therapeutic relent-lessness by not focusing too narrowlyon orthodontic solutions. to the exclusionof other modalities such as surgery orto overuse orthodontic camouflage tech-niques:
• Alveolo-dental parameters are moreimportant than basic bone or architec-tural parameters.
• Upper/lower gaps parameters are moreimportant than position of whateveranatomical element.
• Anterior landmarks are always moreimportant than medium or posteriorones.
Conflict of interest: None declared.
doi:10.1016/j.ijom.2011.07.539
277Fistula rate for modified“Mongolian technique” forcongenital cleft palate repairG. Ayanga ∗, J. Erdenetsogt,R. Bayasgalan, D. Tserendulam,M. ErdenesaikhanMaxillo-Facial Surgery, MongolianMaternal and Child Health ResearchCenter, Ulaanbaatar, Mongolia
Background: The timing and tech-nique for palatoplasty is very controversial,recent literature advocates for early repair,between six and eighteen months of age. Itis using three kinds of techniques of palato-plasty mainly, two flap technique, Furlowdouble opposing z-plasty, and two-steppalatoplasty. Oro-nasal fistula formationis an one of most documented postoper-ative complication, and it’s rate is reportedbetween 6–42.3% in the literature. InMongolia patients often present in olderthan recommended age for palatoplasty,it provides surgeons with the challengeof managing wider defects, which havehigher rates of fistula formation and wounddehiscence. These complications forced
us to modify palatoplasty techniques forimproved outcomes.Objective: The objective is to comparethe efficacy of three established palato-