Publications by authors named "Li-Tung Chang"

Background: Slips, trips (STs), and falls are frequent events in childhood. As a child is likely to impact head-first in these events, craniofacial injuries are the most common trauma. We retrospectively surveyed our experience with pediatric craniofacial injuries and investigated the distributions of wound type and injury site, severity, and mechanism.

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Staphylococcal enterotoxins (SEs) are important causative agents in gastroenteritidis and food poisoning cases. They are serologically grouped into five major classical types, i.e.

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Objectives: To investigate the bond strength and fracture characteristics of various dentine bonding agents (DBAs) on wet or dry enamel.

Methods: Forty molar halves with enamel flattened were divided into 5 groups. Groups 1-4, teeth were acid-etched and treated separately with either an ethanol-based adhesive (Single Bond) or an acetone-based adhesive (Prime & Bond NT) on dry or wet enamel.

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Objectives: To investigate the influence of enamel wetness on marginal quality and enamel microcrack formation using various dentine bonding adhesives; and to determine the changes of marginal quality and enamel microcracks over time.

Methods: Forty extracted molars were each prepared with a cylindrical cavity and divided into five groups. Groups 1-4 were acid-etched and treated separately with either an ethanol-based adhesive (Single Bond) or an acetone-based adhesive (Prime&Bond NT) on either dry or wet enamel.

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Objective: To investigate the differences of lumbosacral kinematics between degenerative and induced spondylolisthetic subjects.

Design: Translations and angulations of spondylolisthetic spine from L1-L2 to L5-S1 were documented by taking X-ray films at flexion, standing and extension positions.

Background: The unstable mechanism of spondylolisthesis leads to lower back pain.

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This study compares the shear bond strengths of plastic brackets with a mechanical base and metal brackets using two different adhesives, and examines the modes of failure using a scanning electron microscope (SEM). Forty extracted human premolars were selected for bonding. Two types of brackets: metal and plastic-Spirit MB, and two orthodontic adhesives: System 1 + and Enlight, were used.

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