Colour Doppler Ultrasonographic Tissue Perfusion Analysis in Peri-Implant Mucosa with and Without Low-Level Laser Therapy: A Prospective Randomized Double-Blind Clinical Trial

彩色多普勒超声组织灌注分析在有无低强度激光治疗的种植体周围黏膜中的应用：一项前瞻性随机双盲临床试验