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PURPOSE The purpose of this study was to estimate the frequency of and describe the clinical characteristics and complications of patients with nonsyndromic multiple mandibular supernumerary premolars. PATIENTS AND METHODS Among 110,500 patients seen between July 2003 and January 2007, 32 cases of multiple (2 or more) mandibular supernumerary premolars(More)
PURPOSE The aim of this study was to provide sex-matched three-dimensional (3D) statistical shape models of the mandible, which would provide cephalometric parameters for 3D treatment planning and cephalometric measurements in orthognathic surgery. MATERIALS AND METHODS The subjects used to create the 3D shape models of the mandible included 23 males and(More)
Accurate simulation and evaluation of mandibular movement is fundamental for the analysis of functional changes and effects of the mandible and maxilla before and after surgical treatments. We applied principal axes of inertia to the three-dimensional (3D) trajectories generated by patient-specific simulations of TMJ movements for the functional evaluations(More)
INTRODUCTION The palate is a suitable site for the placement of orthodontic mini-implants. This study was conducted to assess the bone thickness of the palate to provide a more reliable guide for mini-implant placement. METHODS Computed tomographic records of 18 adults (9 men, 9 women) 18 to 35 years old (mean age, 26.8 +/- 4.0 years) were used to measure(More)
BACKGROUND A paucity of reports exist on the use of botulinum toxin type A injections as an alternative noninvasive treatment for masseteric hypertrophy. OBJECTIVE To evaluate the effects of botulinum toxin type A on masseteric hypertrophy using computed tomography. METHODS Percutaneous intramuscular injections of botulinum toxin type A of 30 U per side(More)
OBJECTIVE We developed a new program for digital subtraction radiography (DSR) having useful functions to get the DSR image more accurately and efficiently. The purpose of this study was to evaluate the accuracy of the DSR image acquired using the new program as compared with the ready-made program. STUDY DESIGN Four observers performed the DSR process(More)
PURPOSE This study was performed to determine the accuracy of linear measurements on three-dimensional (3D) images using multi-detector computed tomography (MDCT) and cone-beam computed tomography (CBCT). MATERIALS AND METHODS MDCT and CBCT were performed using 24 dry skulls. Twenty-one measurements were taken on the dry skulls using digital caliper. Both(More)
OBJECTIVE To investigate the rotational variations of three-dimensional (3D) trajectories at anatomic landmarks by different mandibular kinematics, we applied principal axes of inertia to the 3D trajectories. The principal rotations were determined directly from the anatomy-based trajectories produced by a patient-specific temporomandibular joint(More)
OBJECTIVE To characterize the presentation of C-shaped canals in mandibular molars on dental panoramic radiographs. STUDY DESIGN The sample consisted of 290 patients who had undergone both panoramic dental radiography and computed tomography (CT). Initially the presence of mandibular molars with C-shaped canals was identified on this sample by the use CT.(More)
OBJECTIVES We evaluated the radiographic changes to the operational sites after orthognathic surgery by using fractal analysis. STUDY DESIGN Panoramic radiographs from 35 patients who underwent orthognathic surgery on the mandible without any complications during the osseous healing process were selected. The radiographs taken before the operation (stage(More)