The effect of anterior TEETH shapes on aesthetic parameters in patients with HİGH smile line, Baskent University institute of health sciences

Smiling is one of the best ways of non-verbal communication in which people express themselves. It is very important to determine the anterior tooth shapes in cases where the smile needs to be redesigned for not only aesthetic concerns but also for tooth loss. Especially in patients with high gingival visibility (gummy smile), tooth shapes makes a difference in terms of the space they occupy during smiling. Although anterior tooth shapes are associated with face shape in various doctrines, there are also studies suggesting that there is no such connection. Studies have shown that individuals with a gummy smile are very common in the population. Therefore, it can be assumed that the majority of patients who apply to the clinic will have a gummy smile. Restorative procedures to be applied in gummy smile patients will also be more aesthetically challenging. In the thesis study, tooth form differences are evaluated in terms of aesthetic acceptability, especially in patients with high gingival visibility. Afterwards, it is aimed to compare the face shapes and tooth shapes and how to achieve more aesthetically acceptable results by changing the anterior tooth shapes in daily clinical use. An unidentified face was created, using the Adobe Photoshop CS program, combining the faces of the models whose consent was taken. Later, this face was adjusted in accordance with the doctrine, in square, oval and triangular forms. The dental photographs obtained from the models were combined with the faces that were brought into square, oval and triangular forms in the doctrine. The gingival levels were adjusted to be normal and gummy smile levels in the joined faces. In order to evaluate the perception of gingival color and lip color, new models were obtained by increasing and decreasing the red color in the lip and gingival color by 20%. Obtained models were turned into a mobile compatible survey using the Free Online Surveys (www.freeonlinesurveys.com) website. According to the results of the study, no substantial harmony was observed between the tooth shapes and face shapes in the groups, and the square models with the highest tooth visibility at the gummy smile gingival level were preferred the least. Oval and triangular tooth forms with a more balanced gingival distribution were preferred at a higher rate. According to the results, 20% redder lip color was highly preferred by all study groups, and in terms of gingival color, normal gingival color was found to be more aesthetically pleasing. It is aimed that the results of the study would be guidance for clinicians on how to increase the rate of appreciation by changing the tooth forms in anterior region restorations applied especially to patients with high aesthetic expectations and gummy smile. This study was approved by the Baskent University Medical and Health Sciences Research Board (Project no: D-KA22/01) and was supported by the Baskent University Research Fund. Keywords: Tooth shape, Gummy smile, Face shape.