A study by Jayaprakash et al. revealed that the periodontitis group had a higher mean CRP level (2.49 ± 0.47 ng/mL) compared to the gingivitis group (1.40 ± 0.32 ng/mL) and healthy group (0.56 ± 0.20 ng/mL) [10]. Here, CRP is linked to gingivitis.