Then the marginal precision of the crowns, surface roughness and hardness were measured.
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2. 目的探讨前牙根折至龈下铸造冠桩修复的体会。
ObjectiveTo probe casting veneer peg prosthesis for anterior remnant root.
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3. ③硬度快速包埋方法和慢速包埋方法对铸造冠的硬度影响无差别。
Hardness The hardness of quick-heating methods groups and slow-heating method groups show no significance statistical difference.
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4. 这是一种镍基软质合金，用于铸造冠、桥，因合金质软所以减轻对颌牙磨损，易操作。
This is a soft nickel-based alloy used for making dental crown and bridge. Since is relatively soft, it can reduce wear of paired jaw teeth. Its processing is easy.
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5. 这是一种镍基软质合金，用于铸造冠、桥，因合金质软所以减轻对颌牙磨损，易操作。
This is a soft nickel-based alloy used for making dental crown and bridge. Since the alloy is relatively soft, it can reduce wear of paired jaw teeth. Its processing is easy.
Metal artifact around the crown was found on all images with different size and shape. In the T1, T2, PD, GRE images, the artifacts were circular. While in the GE EPI images which were patch-shaped.
Objective To investigate the influence of three dental alloys casting crowns on the artifacts of MRI imaging during the examination of 3.0T MRI and 1.5T MRI.
Objective To investigate the influence of three dental alloys casting crowns on the artifacts of MRI imaging during the examination of 3.0T MRI and 1.5T MRI.
