CATEGORY 56 AUSTRALASIAN DENTIST A proper balance is needed to achieve a beautiful smile. Over-expanded arch eliminates the buccal corridor space, giving an unnatural smile or a denture-like smile. erefore, ideal smile aesthetics require the transverse dimension of the dental arch to be in harmony with the facial width, neither too narrow nor too broad. Smile Arc: the Mozart of Smile Symphony e curve formed by the incisal edges of the maxillary anterior teeth with the curvature of the lower lip is known as the "smile arc." is arc is considered an important entity in the overall aesthetic appeal of a smile. When the contour of the maxillary teeth follows the natural curvature of the lower lip during a smile, the smile arc is considered consonant. is parallel relationship between the teeth and the lower lip enhances facial harmony and creates a more youthful, attractive appearance. A consonant smile arc suggests dynamism, balance, and symmetry which draws the viewer’s eye naturally across the smile and conveys warmth and vitality [FIG 6]. In contrast, a at smile arc or reverse smile arc is a condition where the teeth appear straight or even slightly inverted in relation to the curve of the lower lip. is can result in a more aged or less expressive look. Such a at arc may occur due to tooth wear, improper orthodontic mechanics, or certain skeletal and dental relationships [Fig 7]. Nowadays, there is more attention given to the smile arc with increasing demand for natural looking aesthetically pleasing smile. With advanced imaging, digital smile design, and AI assisted analysis; clinicians can now plan and evaluate the smile arc with greater precision. is ensures nal results that complement every patient’s unique facial features. Upper lip curvature: It is the relationship of the upper lip with the upper incisors. ey may be at, elevated or depressed. e depressed upper lip is aesthetically unpleasing and gives a negative smile perception irrespective of the gingival display [Fig 8]. Conclusion: Mini-esthetics is the relationship between the lips with the dental components. It marks an important esthetic perspective for orthodontists and thus knowledge of the same is crucial to identify the deviations from the normal. u References 1. Contemporary orthodontics William pro t 6th edition 2. Ackerman MB, Ackerman JL. Smile analysis and design in the digital era. J Clin Orthod. 2002 Apr;36(4):221-36. PMID: 12025359. 3. Occlusal Plane changes with mini-implants to solve complex cases Cury, Sérgio et al.Seminars in Orthodontics, Volume 30, Issue 5, 673 – 683 4. Liang, Ling-Zhi & Hu, Wen-Jie & Zhang, YanLing & Chung, Kwok-Hung. (2013). Analysis of dynamic smile and upper lip curvature in young Chinese. International journal of oral science. 5. 10.1038/ijos.2013.17. CLINICAL Fig 6: Normal Smile arc Fig 8: Upper lip curvature4 Fig 9: Occlusal cant3 SOURCE: Occlusal Plane changes with mini-implants to solve complex cases Cury, Sérgio et al.Seminars in Orthodontics, Volume 30, Issue 5, 673 – 683 Fig 7: Flat smile arc ALL-BOND UNIVERSAL® Truly Simple. Truly Universal. Proudly distributed by Valid until 30/06/2026 amalgadent.com.au 1800 806 450 BUY 3 GET 1 FREE Enhanced durability Ultramild acidity Universal compatibility Hydrophobic for improved durability Flows readily into etched surfaces for both chemical and mechanical sealing Virtually no post-operative sensitivity No refrigeration needed! Smile symmetry and occlusal cant: is is a measure of roll discrepancy in the arch which gives rise to occlusal cant and an asymmetrical smile. e di erence in the posterior teeth exposure on the right and left sides gives this characteristic occlusal cant [Fig 9]. It can be due to underlying skeletal asymmetry or just the dental over extrusion on one side.
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