Publications (2)3.2 Total impact
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Article: Immediate postoperative outcome of orthognathic surgical planning, and prediction of positional changes in hard and soft tissue, independently of the extent and direction of the surgical corrections required.
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ABSTRACT: Our purpose was to evaluate the immediate postoperative outcome of preoperatively planned and predicted positional changes in hard and soft tissue in 100 prospectively and consecutively planned and treated patients; all had various dentofacial deformities that required single or double jaw orthognathic correction using the computerised, cephalometric, orthognathic, surgical planning system (TIOPS). Preoperative cephalograms were analysed and treatment plans and prediction tracings produced by computerised interactive simulation. The planned changes were transferred to models and finally to operation. Five to 6 weeks postoperatively, the changes in profile actually obtained in the hard and soft tissue were cephalometrically assessed. The mean accuracy was relatively high. At the cephalometric reference points where significant differences between planned or predicted, and actually obtained, positional changes in hard and soft tissue were apparent and the inaccuracies were, except for the predicted horizontal position of the lower lip, relatively small. However, the variability of the predicted outcome in individual hard and soft tissues was relatively high. Using the TIOPS planning system with the presently included soft tissue algorithms, the current study shows relatively high mean predictability of the immediately postoperative hard and soft tissue outcome, independent of the extent and direction of required orthognathic correction. Because of the relatively high individual variability, caution is required when presenting the planned and predicted positional changes in the hard and soft tissue preoperatively in individual patients.British Journal of Oral and Maxillofacial Surgery 07/2011; 49(5):386-91. · 1.95 Impact Factor -
Article: Accuracy of combined maxillary and mandibular repositioning and of soft tissue prediction in relation to maxillary antero-superior repositioning combined with mandibular set back A computerized cephalometric evaluation of the immediate postsurgical outcome using the TIOPS planning system.
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ABSTRACT: The purpose of the present study was to evaluate the immediate postsurgical outcome of planned and predicted hard and soft tissue positional changes in relation to maxillary antero-superior repositioning combined with mandibular set back using the computerized, cephalometric, orthognathic surgical planning system (TIOPS). Out of 100 prospectively and consecutively treated patients, 52 patients manifested dentofacial deformities requiring bimaxillary orthognathic surgery with maxillary antero-superior repositioning combined with mandibular set back and so were included. All patients were managed with rigid internal fixation (RIF) and without intermaxillary fixation (IMF). Preoperative cephalograms were analyzed and treatment plans and prediction tracings produced by computerized surgical interactive simulation. The planned horizontal and vertical hard tissue positional changes were transferred to model surgery on a three-dimensional articulator system (SAM) and finally to surgery. Five to six weeks after surgery, the actually obtained hard and soft tissue profile changes were cephalometricly assessed. The mean accuracy of the planned and predicted hard and soft tissue outcome was relatively high varying from 0.0mm to 0.5mm from one cephalometric reference point to another. At the cephalometric reference points where significant differences between planned/predicted, and actually obtained hard and soft tissue positional changes were demonstrated, these significant inaccuracies were, except for the predicted horizontal position of the lower lip, relatively small, varying from 0.2mm to 1.1mm. However, the variability of the predicted hard and soft tissue individual outcome was relatively high. The current study demonstrates from a mean point of view relatively high predictability of the immediate postsurgical hard and soft tissue outcome. However, as the variability of the predicted individual outcome seems to be relatively high, caution should be taken when presenting the planned and predicted hard and soft tissue positional changes to the individual patient, preoperatively.Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery 02/2009; 37(5):279-84. · 1.25 Impact Factor
