| DWT | Direct Wavelet Transform |
| FTIR | Fourier Transform InfraRed spectroscopy |
| GCF | Gingival Crevicular Fluid |
| GNP | gold nano particles |
| -FTIR | Fourier Transform InfraRed micro-spectroscopy |
| -RS | micro-Raman spectroscopy |
| OTM | orthodontic tooth movement |
| SERS | surface enhanced Raman spectroscopy |
| SNV | standard normal variate |