| Abbreviation | Definition |
|---|---|
| NDBA | National Dental Board of Anesthesiology |
| NDCS | National Dental Centre of Singapore |
| NDDS | Northern District Dental Society |
| NDPL | National Dental Pulp Laboratory |
| NDS | Northern Dental Specialists |
| NELDA | National Entry Level Dental Assistant |
| NGFD | North Garland Family Dental |
| NIDCR | National Institute of Dental and Craniofacial Research |
| NLDB | Newfoundland and Labrador Dental Board |
| NMDA | New Mexico Dental Association |
| NNDS | Northern Nevada Dental Society |
| NODA | New Orleans Dental Association |
| NODC | New Orleans Dental Conference |
| NOTI | Need for Orthodontic Treatment Index |
| NPDS | Naval Postgraduate Dental School |
| NSDS | Napa Solano Dental Society |
| NSID | Nepalese Society of Implant Dentistry |
| NTOA | North Texas Orthodontic Associates |
| NYPC | North York Periodontal Centre |
| NZDA | New Zealand Dental Association |