3D渲染的牙齿解剖结构，展示龋齿和牙髓暴露 - 4K分辨率 - 可循环播放视频

detailed 3D medical illustration of a human tooth cross-section showing advanced dental caries. The image displays visible enamel erosion, dentin decay, and pulp chamber inflammation, illustrating the progression of tooth decay in realistic detail. Set against a clean blue gradient background, this visual is ideal for dental education, healthcare presentations, and oral health awareness materials.