Smile Design refers to the many scientific and artistic principles that considered collectively can create a beautiful smile. These principles are established through data collected from patients, diagnostic models, dental research, scientific measurements, and basic artistic concepts of beauty. From the patient’s perspective, beauty measures that individual’s perception of beauty as noted in the saying: ‘‘Beauty is in the eye of the beholder.’’ That perception of beauty may also be influenced by cultural, ethnic, or racial concepts of beauty and may vary The principles of Smile Design require an integration of esthetic concepts that harmonize facial esthetics with the dental facial composition and the dental composition. The dental facial composition includes the lips and the smile as they relate to the face. The dental composition relates more specifically to the size, shape, and positions of the teeth and their relationship to the alveolar bone and gingival tissues. Therefore, Smile Design includes an evaluation and analysis of both the hard and soft tissues of the face and smile Using a comprehensive approach to diagnosing and treatment planning of esthetic cases can help achieve the smile that best enhances the overall facial appearance of the patient and provides the additional benefit of enhanced oral health.