116 Journal of Cranio-Maxillofacial Surgery 34(2006) Suppl. S1 Abstracts, EACFMS XVIII Congress anterolateral walls of the maxillary sinuses, midpalatal suture, and, eventually, separation of the pterygomaxillary sutures were performed. Results: Expansion proceeded at a rate of 0.33–0.66 mm per day and the devices were retained 2–3 months for consolidation. Active orthodontic therapy was started after 8–10 weeks. The distractor was inserted much faster and less manually demanding; the distraction evolved reliably with 1mm per full rotation with 2 to 3×1/3 rotations per day. Removal was simple and reliably performed in local anaesthesia. Conclusion: The presented palatal distractor can be considered a true simplification with at the same time smaller distractor volume. Further improvement is planned to avoid acute angula- tion of the base plates and resulting asymmetrical distraction as well as a paramedian sagittal osteotomy appears to yield more symmetrical results. O.426 Assessment of nasal changes after Le Fort I maxillary osteotomy in orthognathic surgery M. Schneider, S. Zeug, G. Lauer. Department of Maxillofacial Surgery, Universityhospital “Carl Gustav Carus” Technical University, Fetscherstrasse 74, 01307 Dresden, Germany Introduction: The impact of maxillary advancement on na- solabial aesthetics is a well known and often mentioned issue in the clinical practice and in medical publications. In the maxillary advancement surgery the main emphasis is placed on the enhanced occlusion and further predominant facial profile parameters. The assessment of soft tissue changes is based on the lateral cephalometric radiograph. Material and Methods: The sample comprised 73 patients who underwent maxillary advancement during bimaxillary dysgnathic surgery from 2002 to 2004. For quantitative assessment of nasal widening standardized preoperative and postoperative en Face radiographs were compared. Results: The averaged nasal widening was 8 (SD 7%). In one case a nasal narrowing of -14% was seen. The maximal nasal widening amounted to 25% in a case of maxillary backwards movement with distinct anterior intrusion osteotomy. That means, a nasal widening of 8 mm if an averaged nasal width of 33 mm is assumed. On average, a nasal widening of 2.5 mm can be expected in maxillary movement. Discussion: The secondary nasal changes in orthognathic surgery are varied. Particularly, in extreme maxillary movement it is very important to know and avoid these adverse effects by means of specific surgical measures. Nasal widening is primarily caused by changes of the skeletal base that can particularly be found in the intrusion osteotomy. Thereby, the apertura piriformis is shortened. Further reasons are the ablation of mimic muscles and destruction of the muscular nasal parts. O.427 Simultaneous segmentation of the maxilla and rinoplasty: results of the procedure S. Galioto, D. Sfondrini, M. Rabagliati, M. Pastori. Maxillofacial Surgin Department, University of Pavia and S. Matteo Hospital, Pavia, Italy Presently, about 90% of all patients undergoing orthognatic surgery are treated by Le Fort I and mandibular procedures. Maxillary repositioning is accomplished in approximately two- thirds of patient treated, by sectioning the maxilla into two, three, or four segments. Rinoplaststy, as mentoplasty some years ago, is usually performed, if necessary, at least 6 months after the orthognatic surgery. The reasons to postponed that kind of oper- ation was due for technical problem about surgery, anaesthesia and aesthetic. Only recently rinoplasty is performed in the same operation during orthognatic procedure to obtain a better eumorphy and avoiding a second operation to the patient. After rigid fixation of the maxilla and mandible, the nasotra- cheal tube is changed in orotracheal tube and the rinoplasty is performed. Ten consecutive cases of segmental maxillary surgery with rino- plasty are operated in general anesthesia without dental loss and bone necrosis. Rinoplasty is always performed a nasal os- teotomies, in nine cases with open technique and one with closed technique. Modification of the nose after the segmentation of the maxilla and the result of the rinoplasty are considered. Friday, 15 September 2006, 11.00-13.10 Hall 3 Cleft surgery O.428 Record and analysis of lip motion using an in-contacted motion capture system after cleft operation K. Kusumoto 1 , I. Yamamoto 2 , K. Kuniyoshi 1 , T. Takemoto 1 , T. Minakata 1 . 1 Department of Plastic and Reconstructive Surgery, Kansai Medical University, Japan; 2 Yamamoto Dental Clinic, Nishinomiya city, Japan Introduction and Objectives: An in-contacted motion capture system applying infra-red ray reflection is a three-dimensional motion recorder and analyser. In this time, lip motion after cleft lip operation was analysed using the motion capture system. Materials and Methods: Markers, which reflect against infra- red ray, were set on the mid-points between the angle and the top of the cupid bow in both sides in hemilateral cleft lip cases. Using IMCS (MacReflex Camera System; Qualisys, Sweden), three-dimensional coordinates were recorded detecting reflected infra-red ray from markers on the face and lip in four cameras at phonation in [u] and [i]. Three-dimensional coordinates were computer-analysed to make lines in X, Y, and Z axes on the time course. Results: (1) In the items of XY, XZ, YZ, X, Y, and Z , the motion in the affected side was smaller than one in the healthy side. (2) In some cases, the motion distance in the affected side was larger than the one in the healthy side. Conclusions: After cleft lip surgery, not only the static form but also the motion should be symmetrically reconstructed. In this time, we tried to record and analyse the lip motion after cleft lip operation. In the affected side the motion is less than in the healthy side. It is suspected that it is dependent upon the original tissue loss, the operation procedure and/or the operation scar. O.429 Secondary reconstruction of bilateral cleft patient who has undergone resection of premaxilla L. Zouloumis, S. Iordanidis, S. Tsodoulos, N. Lazaridis. Department of Oral and Maxillofacial Surgery, General Hospital, “G. Papanikolaou” Aristotle University, Thessaloniki, Greece Bilateral clefts of the palate pose difficult and unique problems in surgical rehabilitation. The premaxilla traditionally has been a controversil subject with a historic lack of uniformity protocol. In addition, it was shown how deformities develop as a condition