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We have long considered pre-prosthetic treatment plans an integral part of our therapeutic arsenal. In fact, orthodontics offers many possible types of prostheses to improve treatment and to help ensure long-term results. Esthetically speaking, the appearance of the gingiva plays an absolutely critical role in overall esthetic perception, a fortiori for patients whose smile line is average or high. In these cases, having healthy gingiva does not in and of itself guarantee that orthodontic rehabilitation will be successful. Ideally, when someone smiles, the line of the necks of the teeth is parallel to both the plane of occlusion and the horizontal reference lines: the bi-commissural line and the bi-pupillary line (fig. 1 and 2). There should be a regular contour to the marginal gingiva that is perfectly symmetric, with scalloped mucosal margins, connecting the zenith gingival to the interdental papillae (fig. 3) Unfortunately, the ‘‘idyllic’’ smile lines described above are not always present when we perform an intra-oral exam. For

Esthetics and pre-prosthetic orthodontic treatment. Three clinical cases.