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aps. The flaps ranged from 5 cm × 7 cmo 6 cm × 8 cm in size, and were adjustedo the defect of the tongue. The vascularedicle included the radial artery and theephalic vein. In some cases the lateralntebrachial cutaneous nerves of the flapre coapted to the lingual nerve. The out-ome of reconstruction was evaluated byollow-up examinations, considering theontour and mobility of the reconstructedongue, the swallowing function and thepeech function.esults: All patients recovered unevent-

ully from surgery. All transplanted flapsurvived. The patients were followedp for average 2 years and 6 months.uring the follow-up period the contourf the reconstructed tongues was satis-actory. The patients demonstrated goodunctional mobility of the reconstructednd remaining tongue. Postoperatively,he swallowing and speech function wasearly at normal levels and the patientsould ingest a solid or semisolid diet.easonably effective sensory recoveryas observed in all the patients 1 yearostoperatively.onclusions: For the tongue canceratients who underwent hemiglossec-omy, microvascular reconstruction ofhe tongue with free forearm flaps isn ideal, safe and propagable method,hich allows preservation of tongue func-

ion together with good overall clinicalutcomes.

oi:10.1016/j.ijom.2009.03.662

190emitongue allotransplantation

n the canine model.Q. Liao ∗, Q. Li, Y.X. Su, H.C. Liu,

. Li, C.Z. Li, Q. WangDepartment of Oral and Maxillofacialurgery, Guanghua School of Stomatology,un Yat-Sen University, Guangzhou, China

ackground and Objectives: The aim ofhis study was to investigate the feasibil-ty of hemitongue allotransplantation in theanine model.ethods: Eight beagle dogs were enrolled

nto the allotransplant protocol, compris-ng 4 pairs with the same sex and sizes.tandard general endotracheal anaesthesiaas administered throughout the proce-ure. A vertical midline incision was madend we harvested the artery, vein and

erves. A transoral hemiglossectomy washen performed and the right hemitonguepsilateral to the vessel preparation waselivered by pharyngotomy into the neck.

second surgical team performed the

same operation. These two hemitongueswere exchanged and reanastomosis ofthe neurovascular structures were per-formed. Then the pairs were divided intotwo groups, one of which (Group B)used immunosuppressants (cyclosporin A;CsA) whereas the other (Group A) did not.After surgery we observed the general con-dition and survival time of the right grafts.Pathological researches were studied onthe base of survival time. If the grafts sur-vived over 3 months, we investigated theelectrophysiological test of the hypoglos-sal nerve.Results: All hemitongue grafts of GroupA had acute rejection. In Group B onegraft had the irreversible acute rejectionon 11th day after operation. Two animalswere dead due to infection of the neck. Thefourth animal in Group B survived for 100days with the hemitongue graft. On 100thday electrophysiological test of hypoglos-sal nerve of the hemitongue graft verifiedpartial conduction.Conclusion: It is feasible to establish theanimal model of hemitongue allotransplan-tation with beagle dogs. Aggressive dosageof CsA at first followed by maintenancedosage is effective to control the acuterejection.

doi:10.1016/j.ijom.2009.03.663

P191A new classification ofmandibular defects for surgicalreconstructionG.Q. Liao ∗, Y.X. Su, H.C. Liu, J. Li,N. Fahmha, Q. Wang, T.H. Zhang,C.Q. Wan, G.S. Zheng, Y.J. LiangDepartment of Oral and MaxillofacialSurgery, Guanghua School of Stomatology,Sun Yat-Sen University, Guangzhou, China

The deformity and disability caused bymandibular defects always decrease thequality of patients’ lives. The classificationof mandibular defects contributes to theguideline of clinical management andreconstruction. The goals of surgicalreconstruction and rehabilitation includenot only the restoration of appearance, butalso the recovery of functions—that is,the harmony of the occlusion-mandible-muscle-neural reflex. Here, we reviewthe current situation and advances inmandibular reconstruction, and put for-ward a new classification of mandibular

defects dependent on defects in functionalregions, muscle attachment and modernreconstructive methods.

doi:10.1016/j.ijom.2009.03.664

ee Papers—Poster Presentations 587

P192The lateral thoracic flap formaxillofacial defectreconstructionJ. Shi ∗, B. Xu, G.F. Shen, X.D. WangDepartment of Oral and MaxillofacialSurgery, Shanghai Ninth HospitalAffiliated to Shanghai Jiao TongUniversity, Shanghai, China

This study aimed to evaluate the usefulnessof lateral thoracic flap in reconstructingmaxillofacial sift tissue defects to improvethe quality of life of the patients. Totally17 cases with tissue defects in the maxillo-facial region, caused by various disease,were collected during 2004–2006. Theage of these patients ranged from 29–71years (average, 48.4 years), the ratio ofmale to female was 12:5. The lateralthoracic flap or combined with the scapu-lar flap were applied to reconstruct thedefect of soft tissue and/or bone tissue. Allthe flaps survived except one case whichpresented necrosis of the epidermis result-ing from the too fine supplying artery.After 3–32 months follow up, the mor-phology of the reconstructed region wassatisfied, and the scar in the donate sitewas inconspicuous. The application of tho-racic flap is a better choice to improvequality of life of the patients comparedwith other free flaps traditionally used inclinic.

doi:10.1016/j.ijom.2009.03.665

P193Preservation of inferior alveolarnerve during extensive segmentalresection and its reconstructionwith iliac bone for treatment ofodontogenic myxomaC.E.X.S. Ribeiro da Silva ∗,F.O.T. Pacca, M.N. dos Santos,A. Rodriguez, A. CerriDepartment of Oral Medicine, SantoAmaro University – UNISA, Rua Pelotas358, Brazil

Background and Objectives: The odon-togenic myxoma is a benign tumourof mesenchymal origin, locally invasive,recurrent with slow grow. While both jawscan be affected, this tumour is slightlymore common in the mandible. If leftuntreated, it can result in complicationswith increased possibility of morphofunc-tional damage. The therapeutic modalities

range from curettage to in block resec-tion. The aim of this study is to describea clinical case of an extensive mandibularsegmental resection for treatment of myx-oma, its immediate reconstruction with