| PD | Pocket Depth- depth of the Periodontal Pockets in millimeters. |
| CAL | Clinical Attachment Level- measurements in millimeters. |
| BoP | Bleeding on Probing |
| SRP | Scaling and Root Planing |
| aPDT | antimicrobial Photodynamic Therapy |
| Nd:YAG | Neodymium-Doped Yttrium Aluminum Garnet |
| Aa | Aggregatibacter Actinomycetemcomitans |
| Pg | Porphyromonas Gingivalis |
| Pi | Prevotella Intermedia |
| Td | Treponema Denticola |
| Tf | Tannerella Forsythia |
| DNA | Deoxyribonucleic Acid |
| PCR | Polymerase Chain Reaction |