The tissue biotype is one of the critical factors that determine the result of the prosthetic treatment. Initial gingival thickness predicts the outcome of any implant procedure or restorative treatment. It has been documented that patients with thin gingival biotypes were more likely to experience gingival recession following implant and restorative procedures. [2] The thicker biotype prevents mucosal recession, hides the margins of the restoration and camouflages the shadows of the titanium implants. It also preserves the biological seal around the implants, thus reducing crestal bone resorption. Thick biotypes include flat soft tissue and bony architecture, denser, fibrotic soft tissue with a large amount of attached masticatory mucosa, are more resistant to any acute trauma, and respond to disease by pocket formation and intrabony defects. Gum thickness affects treatment outcome probably due to the difference in the amount of blood supply to the underlying bone and susceptibility to resorption. [8],[12],[15] The thin gingival biotype is related to a thin band of keratinized tissue and scalloped gingival contour that suggests thin bony architecture and is more sensitive to any inflammation or trauma.[8], [13] ,[14]Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay The ability of the gum tissue to cover any underlying material is essential to achieve aesthetic results, especially in cases of implant, restorative dentistry, where subgingival metal restorations are mainly used. In this study, the metallic periodontal probe was used in the sulcus to evaluate the thickness of the gingival tissue because it is a reliable, objective, economical and minimally invasive method since periodontal probing procedures are routinely performed during any aesthetic, restorative and implant treatment .[2 ],[16] In the present study the gingival biotype presented a significant difference between male and female subjects. These results are in agreement with the studies conducted by Muller et al., [18] who stated that 1/3 of the sample were females with a thinner biotype and Vandana et al, studied on 32 individuals showed thicker gums in males who reported a thinner gingiva generalized masticatory mucosa for females. [26] RG Shiva manjunath et al stated that 44.7% of females have thin gingival biotype and 76.9% of males have thick biotype. The gingival biotype in females varies with age unlike males. [19] De Rouck et al., in his study, also stated a significant difference between male and female subjects. It concluded that 84% of all measured central incisors of male participants exhibited a thicker biotype than female participants.[4] According to a survey conducted by Bhat et al., the thicker biotype is more prevalent in the male population while the female population consists of a thin and scalloped biotype.[24] The present study showed a significant correlation between biotype and crown height, sulcus depth, width of attached gingiva, papilla height. This is in agreement with the studies conducted by Anand et al who stated that a lower sulcus depth is expected in teeth with thin biotype, [25] Malhotra et al where there is a significant correlation between crown height, width of the attached gingiva and height of the papilla. [1] Whereas the study conducted by Zweers et al, showed a narrow area of ​​attached gingiva in teeth with thick biotype and a wide area of ​​attached gingiva in teeth. [22]