The Shikani Optical StyletTM or SOS （Clarus Medical, USA） was developed as an aid to intubation for difficult airways.^1 The-SOS is composed of a J-shaped malleable body and a lens and light source at the tip and an...The Shikani Optical StyletTM or SOS （Clarus Medical, USA） was developed as an aid to intubation for difficult airways.^1 The-SOS is composed of a J-shaped malleable body and a lens and light source at the tip and an eyepiece at the proximal end. It combines the features of a fiberoptic bronchoscope and a lightwand. It can be used alone or combined with a camera or monitor and both adult and pediatric versions are available.^2.3展开更多
We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classi...We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classifications and skeletal patterns. The medical records and lateral cephalogrammes of 1 403 malocclusion cases taken before treatment were measured to evaluate compensation of molar angulation in relation to the skeletal jaw. The cases were stratified by age, Angle classification and skeletal patterns. Differences in the mesiodistal angulation of the first molars were compared among the stratifications. We observed three main phenomena. First,angulation of the upper first molar varied significantly with age and tipped most distally in cases aged,12 years and least distally in cases aged.16 years. The lower first molar did not show such differences. Second, in Angle Class II or skeletal Class II cases, the upper first molar was the most distally tipped, the lower first molar was the most mesially tipped, and opposite angulation compensation was observed in Class III cases. Third, in high-angle cases, the upper and lower first molars were the most distally tipped, and opposite angulation compensation was observed in low-angle cases. These data suggest that the angulation of the molars compensated for various growth patterns and malocclusion types. Hence, awareness of molar angulation compensation would help to adjust occlusal relationships, control anchorage and increase the chances of long-term stability.展开更多
文摘目的评价计算机辅助设计与制造(computer aided design and computer aided manufacturing,CAD/CAM)新型纳米复合陶瓷Lava Ultimate髓超嵌体和长石质瓷Vita TriLuxe髓超嵌体修复根管治疗后牙体缺损的临床效果。方法选取2017年1—12月于南京市口腔医院牙体牙髓病科就诊的58例患者根管治疗后缺损磨牙60颗,随机均分为两组,其中观察组30颗,采用Lava Ultimate髓超嵌体修复;对照组30颗,采用Vita TriLuxe髓超嵌体修复。根据改良美国公共卫生署(United States Public Health Service,USPHS)标准,比较两组临床修复效果。结果 60颗修复体均效果良好,无修复体脱落,仅在对照组发现1例修复体折裂情况;观察组在边缘密合性、完整性、继发龋和牙龈炎症方面与对照组比较,差异无统计学意义(P> 0.05);但观察组的对颌牙磨耗情况轻于对照组,差异有统计学意义(P <0.05)。结论 Vita TriLuxe髓超嵌体和Lava Ultimate髓超嵌体皆可用于修复根管治疗后的牙体缺损,新型纳米复合陶瓷Lava Ultimate相较于长石质瓷Vita TriLuxe更能减少对颌牙的磨耗,值得临床推广应用。
文摘The Shikani Optical StyletTM or SOS （Clarus Medical, USA） was developed as an aid to intubation for difficult airways.^1 The-SOS is composed of a J-shaped malleable body and a lens and light source at the tip and an eyepiece at the proximal end. It combines the features of a fiberoptic bronchoscope and a lightwand. It can be used alone or combined with a camera or monitor and both adult and pediatric versions are available.^2.3
基金supported by the Specific Research Project of Health Pro Bono Sector, Ministry of Health, China (200802056)
文摘We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classifications and skeletal patterns. The medical records and lateral cephalogrammes of 1 403 malocclusion cases taken before treatment were measured to evaluate compensation of molar angulation in relation to the skeletal jaw. The cases were stratified by age, Angle classification and skeletal patterns. Differences in the mesiodistal angulation of the first molars were compared among the stratifications. We observed three main phenomena. First,angulation of the upper first molar varied significantly with age and tipped most distally in cases aged,12 years and least distally in cases aged.16 years. The lower first molar did not show such differences. Second, in Angle Class II or skeletal Class II cases, the upper first molar was the most distally tipped, the lower first molar was the most mesially tipped, and opposite angulation compensation was observed in Class III cases. Third, in high-angle cases, the upper and lower first molars were the most distally tipped, and opposite angulation compensation was observed in low-angle cases. These data suggest that the angulation of the molars compensated for various growth patterns and malocclusion types. Hence, awareness of molar angulation compensation would help to adjust occlusal relationships, control anchorage and increase the chances of long-term stability.
