NEET PG DENTAL EXAM

Detailed explanation-1: -The average pH dropped from 5.12 +/-0.56 to 4.93 +/-0.45. On the basis of this pH drop, it is estimated that the ‘natural’ skin surface pH is on average 4.7, i.e. below 5.

Detailed explanation-2: -Skin pH is normally acidic, ranging between 4 and 6, while the body’s internal environment maintains a neutral to slightly alkaline pH ( 7.4). This creates a steep pH gradient of 2 to 3 units between the outermost layer of skin (i.e., the stratum corneum) and the systemic milieu.

Detailed explanation-3: -The sweat gland secretions contain amino acids and lactic acid, while the sebaceous gland secretions consist of sebum (fatty acids and “natural oils”). As indicated by its name, the acid mantle will naturally stay slightly acidic with a pH of around 4.5-5.5.

Detailed explanation-4: -Today, the term “normal skin pH” is understood to be the pH value of the surface of the skin of the lower arm of a healthy adult male Caucasian. Its mean value lies in the range 5.4-5.9. In most cases, it is determined by means of a flat glass electrode.