A comparative study on the accuracy of pedicle screw placement assisted by personalized rapid prototyping template between pre- and post-operation in patients with relatively normal mid-upper thoracic spine.

Purpose: The aim of this study was to assess the accuracy of rapid prototyping drill template technique for placing pedicle screws in the mid-upper thoracic vertebrae in clinics.

Methods: 151 consecutive patients underwent thoracic instrumentation and fusion for a total of 582 pedicle screws placed in the mid-upper thoracic vertebrae. Using computer software, the authors constructed drill templates that fit onto the posterior elements of the mid-upper thoracic vertebrae with drill guides designed to instrument the pedicles.

[Application of three-dimensional virtual technology in mandibular defects reconstruction with free fibular flap].

Purpose: To present a method for mandibular defects reconstruction with free fibular flap by three-dimensional virtual technology.

Methods: In 11 patients (8 with ameloblastomas, 1 with ossifying fibroma, 2 with carcinoma of the mandibular gingiva ), three-dimensional virtual technology was simulated with software. The osteotomies were translated into rapid prototyping guides.

Preservation of the inferior alveolar neurovascular bundle in the osteotomy of benign lesions of the mandible using a digital template.

Our aim was to evaluate the effect of a digital template in the preservation of the inferior alveolar neurovascular bundle during osteotomy for benign lesions of the mandible in 6 patients who were treated with mandibular osteotomies during 2013. Computed tomographic (CT) data were imported into ProPlan CMF 1.4 software.

Application of digital templates to guide total alloplastic joint replacement surgery with biomet standard replacement system.

Purpose: To design and manufacture digital templates to guide Biomet total alloplastic joint replacement surgery (Biomet, Warsaw, IN) and evaluate the clinical efficacy.

Materials And Methods: Six patients who underwent total alloplastic joint replacement surgery from November 2013 to March 2014 were included in this study. Before surgery, the Biomet standard prostheses were scanned and imported into the ProPlan CMF 1.

Deviation analysis of atlantoaxial pedicle screws assisted by a drill template.

Although C1-C2 pedicle screw fixation provides an excellent fusion rate and rigid fixation, this technique has a potential risk. It is essential to develop an accurate screwing method to avoid this neurovascular injury. To develop and validate the accuracy of a novel navigational template for C1-C2 pedicle screw placement in cadaveric specimens, computed tomography scans with 1-mm-wide cuts were obtained of 32 cadaveric cervical specimens.

Effect of digital template in the assistant of a giant condylar osteochondroma resection.

Purpose: Exostosis osteochondroma is usually resected with the whole condyle even part of it is not involved. This study was to report the effect of using digital template in the assistant of resection while protecting the uninvolved condyle.

Methods: We used computer-aided design technique in the assistant of making preoperative plan of a patient with giant condylar osteochondroma of exogenous type, including determining the boundary between the tumor and the articular surface of condyle, and designing the virtual tumor resection plane, surgical approach, and remove-out path of the tumor.

Digital occlusal splint for condylar reconstruction in children with temporomandibular joint ankylosis.

Purpose: A costochondral graft (CCG) is usually used for condylar reconstruction in children with temporomandibular joint (TMJ) ankylosis. The aim of the present study was to introduce the application of a digital occlusal splint (DOS) in the assistance of CCG to treat ankylosis and mandibular deviation simultaneously.

Materials And Methods: We designed and implemented a retrospective cohort study and enrolled a sample of growing pediatric patients with unilateral TMJ ankylosis and mandibular deviation who were treated for CCG at our department.

Deviation analysis of C1-C2 transarticular screw placement assisted by a novel rapid prototyping drill template: a cadaveric study.

Study Design: Cadaveric study.

Objective: The aim of this study was to develop and validate the accuracy of a novel navigational template for C1-C2 transarticular screw (C1C2TAS) placement in cadaveric specimens.

Summary Of Background Data: Currently, C1C2TASs are primarily positioned using a free-hand technique or under fluoroscopic guidance.

[A novel computer-assisted drill template for atlantoaxial pedicle screw placement:a cadaveric experimental study].

Objective: To validate the accuracy of atlanto-axial pedicle screw placement with a rapid prototyping drill guide template and analyze the factors of screw deviations.

Methods: Computed tomography (CT) scan was performed in 16 cervical specimens. And three-dimension cervical vertebrae was reconstructed by Mimics software.

Deviation analysis of C2 translaminar screw placement assisted by a novel rapid prototyping drill template: a cadaveric study.

Purpose: The goal of this study is to evaluate the accuracy of patient-specific CT-based rapid prototype drill templates for C2 translaminar screw insertion.

Methods: Volumetric CT scanning was performed in 32 cadaveric cervical spines. Using computer software, the authors constructed drill templates that fit onto the posterior surface of the C2 vertebrae with drill guides to match the slope of the patient's lamina.

A novel method of computer aided orthognathic surgery using individual CAD/CAM templates: a combination of osteotomy and repositioning guides.

The maxilla is usually positioned during orthognathic surgery using surgical splints, which has many limitations. In this preliminary study we present a new computer-aided design and manufacture (CAD/CAM) template to guide the osteotomy and the repositioning, and illustrate its feasibility and validity. Six patients with dental maxillofacial deformities were studied.

Dermatoglyphics from all Chinese ethnic groups reveal geographic patterning.

Completion of a survey of dermatoglyphic variables for all ethnic groups in an ethnically diverse country like China is a huge research project, and an achievement that anthropological and dermatoglyphic scholars in the country could once only dream of. However, through the endeavors of scientists in China over the last 30 years, the dream has become reality. This paper reports the results of a comprehensive analysis of dermatoglyphics from all ethnic groups in China.

Modular preoperative planning software for computer-aided oral implantology and the application of a novel stereolithographic template: a pilot study.

Purpose: In the field of oral implantology, there is a trend toward computer-aided implant surgery, especially the application of computerized tomography (CT)-derived surgical templates. However, because of relatively unsatisfactory match between the templates and receptor sites, conventional surgical templates may not be accurate enough for the severely resorbed edentulous cases during the procedure of transferring the preoperative plan to the actual surgery. The purpose of this study is to introduce a novel bone-tooth-combined-supported surgical guide, which is designed by utilizing a special modular software and fabricated via stereolithography technique using both laser scanning and CT imaging, thus improving the fit accuracy and reliability.