Humans have teeth of different sizes and shapes, a condition known as heterodonty, allowing different teeth to be specialized for different tasks. Dental formulae are used to indicate the number of each type of tooth which is required for maintaining records and better communication between dentists. There are different types of teeth (incisors, canines, premolars and molars) which have specific form to perform their functions like mastication, aesthetics, speech and protection. To perform all these functions to the optimal level, teeth should have normal form and proper alignment. Form and alignment of anterior as well as posterior teeth helps in articulation of sounds which has an important effect on phonetics. For aesthetics, anterior teeth also need to have proper form and alignment. Similarly proper form and alignment of teeth help in maintenance of teeth in dental arches along with the development and the protection of the periodontium which support them. Therefore, we should always make an effort to make dental restoration that would comply with normal form and alignment for periodontal physiology and health.