Three-Dimensional Photography for Evaluating the Effectiveness of Botulinum Toxin Injection for Masseter Hypertrophy.

Background: Masseter hypertrophy is a common condition that causes a undesirable square face, and often treated with botulinum toxin type A (BoNTA). Subjective assessments of BoNTA effectiveness vary from physician to patient, necessitating an objective approach for evaluation. This study introduces three-dimensional photography (3DP) for the first time in clinical assessment to evaluate BoNTA treatment for masseter hypertrophy.

Significantly reducing the presurgical preparation time for anterior pelvic fracture surgery by faster creating patient-specific curved plates.

Background: To shorten the preoperative preparation time, reconstruction plates were designed using the computed tomography (CT)-based three-dimensional (3D) medical imaging surgical planning software OOOPDS. In addition, 3D printing was used to generate curved plates for anterior pelvic fracture surgeries.

Methods: This study analyzed two groups with the same 21 patients who underwent surgery for traumatic anterior pelvic ring fractures.

Evaluation of the potential denture covering area in buccal shelf with intraoral scanner.

Background/purpose: The characteristic of soft tissue changes in buccal shelf area during function is unclear. This study aimed for evaluating the potential denture covering area in buccal shelf area in different ranges of mouth opening by a digital approach.

Materials And Methods: Nineteen qualified dentate participants were enrolled.

Engineering Additive Manufacturing and Molding Techniques to Create Lifelike Willis' Circle Simulators with Aneurysms for Training Neurosurgeons.

Neurosurgeons require considerable expertise and practical experience in dealing with the critical situations commonly encountered during difficult surgeries; however, neurosurgical trainees seldom have the opportunity to develop these skills in the operating room. Therefore, physical simulators are used to give trainees the experience they require. In this study, we created a physical simulator to assist in training neurosurgeons in aneurysm clipping and the handling of emergency situations during surgery.

The rise of 3D Printing entangled with smart computer aided design during COVID-19 era.

During the current Pandemic, seven and a half million flights worldwide were canceled which disrupted the supply chain of all types of goods such as, personal protective gears, medical health devices, raw materials, food, and other essential equipments. The demand for health and medical related goods increased during this period globally, while the production using classical manufacturing techniques were effected because of the lockdowns and disruption in the transporation system. This created the need of geo scattered, small, and rapid manufacturing units along with a smart computer aided design (CAD) facility.

Passive Magnetic-Flux-Concentrator Based Electromagnetic Targeting System for Endobronchoscopy.

In this paper, we demonstrate an innovative electromagnetic targeting system utilizing a passive magnetic-flux-concentrator for tracking endobronchoscope used in the diagnosis process of lung cancer tumors/lesions. The system consists of a magnetic-flux emitting coil, a magnetic-flux receiving electromagnets-array, and high permeability silicon-steel sheets rolled as a collar (as the passive magnetic-flux-concentrator) fixed in a guide sheath of an endobronchoscope. The emitting coil is used to produce AC magnetic-flux, which is consequently received by the receiving electromagnets-array.

Surgical Treatment for Posterior Dislocation of Hip Combined with Acetabular Fractures Using Preoperative Virtual Simulation and Three-Dimensional Printing Model-Assisted Precontoured Plate Fixation Techniques.

Background And Purpose: Hip dislocation combined with acetabular fracture remains a challenging condition for orthopedic surgeons. In this study, we utilized a computer-assisted simulation and three-dimensional (3D) printing technology to treat patients with hip dislocation combined with acetabular fracture. We hypothesized that the 3D printing-assisted method would shorten the internal fixation time and surgical time.

Feasibility and Clinical Effectiveness of Three-Dimensional Printed Model-Assisted Nuss Procedure.

Background: The Nuss procedure is a minimally invasive technique for correcting pectus excavatum. We hypothesized that three-dimensional (3D) simulation may shorten operation time and provide better morphologic outcome. This study aimed to demonstrate the feasibility of the 3D model-assisted Nuss procedure and to compare its potential benefits with those of the traditional Nuss procedure.

Pre-operative virtual simulation and three-dimensional printing techniques for the surgical management of acetabular fractures.

Purpose: Surgical treatment of acetabular fractures with plate fixation is challenging for orthopaedic surgeons because of variations of the surface curvature and complex fracture patterns of the acetabulum. We present our experience with pre-operative computer-assisted virtual simulation and three-dimensional (3D) printing techniques for the surgical treatment of acetabular fractures, especially in terms of operative time and surgical outcomes.

Methods: Twenty-nine patients with acetabular fractures treated with locking plates were included in this retrospective study (conventional locking plate fixation, n = 17; 3D-printing-assisted precontoured locking plate fixation, n = 12).

Conventional plate fixation method versus pre-operative virtual simulation and three-dimensional printing-assisted contoured plate fixation method in the treatment of anterior pelvic ring fracture.

Purpose: Treating pelvic fractures remains a challenging task for orthopaedic surgeons. We aimed to evaluate the feasibility, accuracy, and effectiveness of three-dimensional (3D) printing technology and computer-assisted virtual surgery for pre-operative planning in anterior ring fractures of the pelvis. We hypothesized that using 3D printing models would reduce operation time and significantly improve the surgical outcomes of pelvic fracture repair.

The Role of Three-Dimensional Printing in the Nuss Procedure: Three-Dimensional Printed Model-Assisted Nuss Procedure.

Background: The Nuss procedure is a minimally invasive surgery for pectus excavatum. Success of the Nuss procedure is dependent on a previously bent pectus bar that is shaped to the desired curvature of the chest wall. Traditionally, the size and curvature of the metallic pectus bar are determined by trial and error.

Exposure to fine particulate matter causes oxidative and methylated DNA damage in young adults: A longitudinal study.

An increased understanding is needed of the physiological effects and plausible biological mechanisms that link PM (particulate matter with an aerodynamic diameter below 2.5μm) exposure to mortality and morbidities such as atherosclerosis and respiratory disease. PM causes carcinogenic health effects.