Impact of 2D:4D Ratio on Oral Hygiene and Gingival Health

Oral hygiene and gingival health of all patients were assessed using the Turesky Modification of the Quigley-Hein Plaque Index and the Gingival Index. Tooth brushing frequency was recorded. The 2D:4D ratio was calculated by dividing the second digit length by the fourth, with three measurements taken per finger to ensure reliability. A cut-off value of 1 was used to evaluate prenatal androgen influence, and participants were grouped by 2D:4D ratio (≥1 or \<1). All participants received standardized oral hygiene instructions from the same instructor, including Modified Bass brushing and interdental cleaning. A second clinical exam was performed one week later by the same examiner, and both indices were re-scored.