We attempted to verify the reproducibility of treatment using surgical plates and articula tors made especially for surgicalorthodontic treatment, by making preoperative predic tions and conducting postoperative comparative reviews. We conducted a comparative analysis of preoperative cephalometric values, metrics obtained via "paper surgery", and postoperative cephalometric values. Furthermore, we examined the orthognathic surgery using preand postoperative data. The postoperative metrics were

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... imilar to the preop erative predictive values. The tendency to mandibular prognathism was improved. We concluded that surgical plates prepared using this articulator are effective and that this method is very useful for making postoperative predictions. (J Osaka Dent Univ 2019 ; 53 : 161169) Key words : Orthognathic surgery ; Skeletal mandibular protrusion ; Articulator for or thognathic surgery ; Prediction of dentofacial changes ; Surgical plate.