ABSTRACT
OBJECTIVE: Accurate prediction of the surgical outcome is important in treating dentofacial deformities. Visualized treatment objectives usually involve manual surgical simulation based on tracing of cephalometric radiographs. Recent technical advancements have led to the use of computer assisted imaging systems in treatment planning for orthognathic surgical cases. The purpose of this study was to examine and compare the ability and reliability of digitization using Dolphin Imaging Software with traditional manual techniques and to compare orthognathic prediction with actual outcomes. MATERIALS AND METHODS: Forty patients consisting of 35 women and 5 men (32 class III and 8 class II) with no previous surgery were evaluated by manual tracing and indirect digitization using Dolphin Imaging Software. Reliability of each method was assessed then the two techniques were compared using paired t test. RESULT: The nasal tip presented the least predicted error and higher reliability. The least accurate regions in vertical plane were subnasal and upper lip, and subnasal and pogonion in horizontal plane. There were no statistically significant differences between the predictions of groups with and without genioplasty. CONCLUSION: Computer-generated image prediction was suitable for patient education and communication. However, efforts are still needed to improve accuracy and reliability of the prediction program and to include changes in soft tissue tension and muscle strain.
ABSTRACT
Treatment planning poses difficulties in edentulous patients for orthognathic surgery prediction and fixation.Treatment of severe class III malocclusion frequently requires orthognathic surgical procedures. For such patients, orthognathic surgery would be the only option before prosthetic rehabilitation.This clinical report describes step-by-step fabrication of a surgical splint for an edentulous 22-year-old patient with a severe class III malocclusion.The patient wound up in class I occlusions and stable prosthodontic rehabilitation.Using splints for planning and guiding the surgery in edentulous patients facilitates accurate positioning of the jaws and saves time in the operating room.
