This book contains papers from the First International Workshop on Oral and Dental Image Analysis, ODIN 2025, the ToothFairy3: Fast Multi-class Segmentation in CBCT Volumes Challenge, and the Semi-supervised Teeth Segmentation and Registration, STSR 2025 Challenge, which took place in conjunction with MICCAI 2025 in Daejeon, South Korea, during September 2025.ODIN 2025 received 13 submissions, out of which 9 papers were accepted for publication; ToothFairy3 had 18 final submissions, of which 6 were accepted for publication; and for STSR 2025, 5 papers are included from 78 teams registered in the segmentation task and 52 teams in the registration task.