In the past decade there has been a rapid increase in the use of mobile devices, particularly smartphones, for communication and internet browsing. A recent study shows that 79% of the population between the age 18-44 years have their cell phones with them almost all the time, with only 2 hours of their walking day spend without their cell in hand. Extensive use of smartphones can be associated with physical health–related problems, such as pain in the wrists and neck, and it also exposes hands to intense stresses that may lead to pain and musculoskeletal disorders of the hand and thumb. Single-hand-held smartphone use compels individuals to engage in repetitive flexion/extension of the wrist and thumb. Continuous repetitive movements with the thumb have been identified as risk factors which may lead to disorders of its musculature causing musculoskeletal disorders (MSD) like tendinosis of the extensor pollicis longus (EPL) and flexor pollicis longus tendon (FPL) and the joints of the thumb. To date, little is known about the possible adverse effects of mobile phone overuse on the hand and thumbs. Case reports suggest a link between high keystroke counts and hand disorders, such as first carpometacarpal osteoarthritis and De Quervain tenosynovitis. Severity of this condition in the hands is correlated with impaired functional ability. Hence, many people with MSD in their hands are unable to maintain proper oral hygiene, resulting in accumulation of plaque and calculus, which increases the likelihood of dental caries and periodontal disease. Few studies have been reported about this substantial increase in the number of smartphone users and its association with musculoskeletal discomfort but not on its impact on oral cavity or oral hygiene maintenance. Hence, the aim of this present study is to assess the level of smart phone addiction and its association with hand grip strength and its impact on oral hygiene.