Evaluation of dental parameters perception by Lebanese prosthodontists, orthodontists and aesthetic doctors

Celine Kamel, Nadine Nachabe, Nada Osta, Carina Mehanna Zogheib


The aim of this study was to compare the effect of varying smile parameters with respect to three indices between Lebanese dentists (prosthodontists and orthodontists) and medical doctors. 245 participants were divided into 3 groups. A photograph of the smile that conforms to a woman’s aesthetic standards has been digitally altered to provide a reference image. Next, images where modified then evaluated. The collected data was analyzed. Dental professionals critically judged dental aesthetics by focusing on the gingivo-dental characteristics that make the smile less pleasant. Dental professionals detected minimal dental discrepancies in a smile, unlike doctors who assessed the smile in relation to the entire face since their judgment is global. Lebanese doctors have a different perception of oral aesthetics from Lebanese prosthodontists and orthodontists. 



Le but de cette étude était de comparer la perception de divers paramètres du sourire par rapport à trois indices entre les dentistes libanais (prosthodontistes et orthodontistes) et les médecins travaillant dans le domaine de l’esthétique. 245 participants ont été répartis en 3 groupes. Une photographie du sourire conforme aux normes esthétiques d’une femme a été modifiée numériquement pour avoir une image de référence. Ensuite, les images ont été modifiées puis évaluées. L’analyse des données a montré la présence d’une différence entre les orthodontistes et les prosthodontistes d’une part et entre les médecins d’autre part. Les professionnels dentaires jugent de manière critique l’esthétique dentaire en se concentrant sur les caractéristiques gingivo-dentaires qui rendent le sourire moins agréable. Les professionnels dentaires détectent des écarts dentaires minimes dans un sourire, contrairement aux médecins qui évaluent le sourire par rapport à l’ensemble du visage puisque leur jugement est global. Les médecins libanais ont une perception de l’esthétique buccale différente de celle des prosthodontistes et orthodontistes libanais. 

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Al-Fouzan AF, Mokeem LS, Al-Saqat RT, Alfalah MA, Alharbi MA, Al-Samary AE. Botulinum Toxin for the Treatment of Gummy Smile. The Journal of Contemporary Dental Practice. 2017 Jun;18(6):474–8.

Machado AW. 10 commandments of smile esthetics. Dental Press J Orthod. 2014;19(4):136–57.

Haas CF, Champion A, Secor D. Motivating factors for seeking cosmetic surgery: a synthesis of the literature. Plast Surg Nurs. 2008 Dec;28(4):177–82.

Faure J, Bolender Y. [Beauty judgment: review of the literature]. Orthod Fr. 2014 Mar;85(1):3–29.

Imadojemu S, Sarwer DB, Percec I, Sonnad SS, Goldsack JE, Berman M, et al. Influence of surgical and minimally invasive facial cosmetic procedures on psychosocial outcomes: a systematic review. JAMA Dermatol. 2013 Nov;149(11):1325–33.

Frame J, Shahrokh C, David J, Husain A. Aesthetic Surgery Techniques : A Case-based Approach. Edinburgh, Scotland: Elsevier. 2019;1st ed.

Koidou VP, Rosenstiel SF, Rashid RG. Celebrity smile esthetics assessment: Smile angulation. J Prosthet Dent. 2017 May;117(5):636–41.

Chan MYS, Mehta SB, Banerji S. An evaluation of the influence of teeth and the labial soft tissues on the perceived aesthetics of a smile. Br Dent J. 2017 Aug;223(4):272–8.

Mostafa D. A successful management of sever gummy smile using gingivectomy and botulinum toxin injection: A case report. International Journal of Surgery Case Reports. 2018;42:169–74.

Farzanegan F, Jahanbin A, Darvishpour H, Salari S. Which has a Greater Influence on Smile Esthetics Perception: Teeth or Lips? Iran J Otorhinolaryngol. 2013;(27):239–44.

Naini FB, Moss JP, Gill DS. The enigma of facial beauty: esthetics, proportions, deformity, and controversy. Am J Orthod Dentofacial Orthop. 2006 Sep;130(3):277–82.

An S-M, Choi S-Y, Chung Y-W, Jang T-H, Kang K-H. Comparing esthetic smile perceptions among laypersons with and without orthodontic treatment experience and dentists. Korean J Orthod. 2014;44(6):294.

Peck S, Peck L. Selected aspects of the art and science of facial esthetics. Semin Orthod. 1995 Jun;1(2):105–26.

Ioi H, Kang S, Shimomura T, Kim S-S, Park S-B, Son W-S, et al. Effects of vertical positions of anterior teeth on smile esthetics in Japanese and korean orthodontists and orthodontic patients. J Esthet Restor Dent. 2013 Aug;25(4):274–82.

Feu D, de Andrade FB, Nascimento APC, Miguel JAM, Gomes AA, Júnior JC. Perception of changes in the gingival plane affecting smile aesthetics. 2011 Jan;7.

Chakroborty G, Pal T, Chakroborty A. A study on gingival component of smile. Journal of the International Clinical Dental Research Organization. 2015 Jan 1;7:111.

Havens DC, McNamara JA, Sigler LM, Baccetti T. The role of the posed smile in overall facial esthetics. Angle Orthod. 2010 Mar;80(2):322–8.

Suzuki L, Machado AW, Bittencourt MAV. An evaluation of the influence of gingival display level in the smile aesthetics. Dental Press Journal of Orthodontics. 2011 Oct;16(5):1–10.

Moore T, Southard K, Casko J, Qian F, Southard T. Buccal corridors and smile esthetics. Am J Orthod Dentofacial Orthop. 2005 Feb 1;127(2).

Roden-Johnson D, Gallerano R, English J. The effects of buccal corridor spaces and arch form on smile esthetics. Am J Orthod Dentofacial Orthop. 2005 Mar;127(3):343–50.

Klimek L, Bergmann K-C, Biedermann T, Bousquet J, Hellings P, Jung K, et al. Visual analogue scales (VAS): Measuring instruments for the documentation of symptoms and therapy monitoring in cases of allergic rhinitis in everyday health care. Allergo J Int. 2017;26(1):16–24.

Ioi H, Nakata S, Counts AL. Effects of buccal corridors on smile esthetics in Japanese. Angle Orthod. 2009 Jul;79(4):628–33.

Sandler J. Systematized orthodontic treatment mechanics. Journal of Orthodontics. 2002 Jun 1;29(2):153–153.

Ker AJ, Chan R, Fields HW, Beck M, Rosenstiel S. Esthetics and Smile Characteristics From the Layperson’s Perspective. The Journal of the American Dental Association. 2008 Oct;139(10):1318–27.

Springer NC, Chang C, Fields HW, Beck FM, Firestone AR, Rosenstiel S, et al. Smile esthetics from the layperson’s perspective. Am J Orthod Dentofacial Orthop. 2011 Jan;139(1):e91–101.

Thomas M, Reddy R, Reddy BJ. Perception differences of altered dental esthetics by dental professionals and laypersons. Indian J Dent Res. 2011 Apr;22(2):242–7.

Machado AW, Moon W, Gandini LG. Influence of maxillary incisor edge asymmetries on the perception of smile esthetics among orthodontists and laypersons. Am J Orthod Dentofacial Orthop. 2013 May;143(5):658–64.

Rosa M, Olimpo A, Fastuca R, Caprioglio A. Perceptions of dental professionals and laypeople to altered dental esthetics in cases with congenitally missing maxillary lateral incisors. Prog Orthod. 2013 Oct 1;14.

Pinho S, Ciriaco C, Faber J, Lenza MA. Impact of dental asymmetries on the perception of smile esthetics. Am J Orthod Dentofacial Orthop. 2007 Dec;132(6):748–53.

Vig RG, Brundo GC. The kinetics of anterior tooth display. J Prosthet Dent. 1978 May;39(5):502–4.

Rai CD, Rai D, Rai A, Gill V, Rai T. Perception of Smile Esthetics: A comparative Evaluation in Orthodontist and Laypersons. 2013;3(1):29–36.

Abu Alhaija ESJ, Al-Shamsi NO, Al-Khateeb S. Perceptions of Jordanian laypersons and dental professionals to altered smile aesthetics. The European Journal of Orthodontics. 2011 Aug 1;33(4):450–6.

Stolz S, Lefebvre F, Bolender Y, Kanter D. Perception esthétique de la position verticale des bords libres des incisives latérales maxillaires dans l’arc du sourire. Orthod Fr. 2017 Sep 1;88(3):251–61.

Parekh SM, Fields HW, Beck M, Rosenstiel S. Attractiveness of variations in the smile arc and buccal corridor space as judged by orthodontists and laymen. Angle Orthod. 2006 Jul;76(4):557–63.

Almanea R, Modimigh A, Almogren F, Alhazzani E. Perception of smile attractiveness among orthodontists, restorative dentists, and laypersons in Saudi Arabia. Journal of Conservative Dentistry. 2019 Jan 1;22(1):69.

Saffarpour A, Ghavam M, Saffarpour A, Dayani R, Fard MJK. Perception of Laypeople and Dental Professionals of Smile Esthetics. J Dent (Tehran). 2016 Mar;13(2):85–91.

Peck S, Peck L, Kataja M. The gingival smile line. Angle Orthod. 1992;62(2):91–100; discussion 101-102.

Olivares A, Vicente A, Jacobo C, Molina Sm, Rodriguez A, Bravo La. Canting of the occlusal plane: Perceptions of dental professionals and laypersons. Med Oral. 2013;e516–20.

Sabri R. The 8 components of a balanced smile. J Clin Orthod. 2005 Jan 1;39:155–67.

Padwa BL, Kaiser MO, Kaban LB. Occlusal cant in the frontal plane as a reflection of facial asymmetry. J Oral Maxillofac Surg. 1997 Aug;55(8):811–6; discussion 817.

Miller CJ. The smile line as a guide to anterior esthetics. Dent Clin North Am. 1989 Apr;33(2):157–64.



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