| PD | Probing Depth |
| CAL | Clinical Attachment Level |
| BOP | Bleeding on Probing |
| PI | Plaque Index |
| QH | Quigley Hein Plaque Index |
| FMD | Full-Mouth Disinfection |
| FMS | Full-Mouth Scaling |
| SRP | Scaling and Root Planing |
| Q-SRP | Quadrant-Based Scaling and Root Planing |
| FMDAP | Full-Mouth Disinfection with Air Polishing |
| SSRI | Selective Serotonin Reuptake Inhibitor |