Title

Assessment of buccal corridor, maxillary interincisal midline and gingival display during smiling: A digital photographic analysis

Authors

Abdulrahman Ahmed Ismail^1,*, Shouq Abdulrahman Almathami¹, Mohammed Ghazi Sghaireen¹ & Doaa Abdelaziz A. Helal^1,2

Affiliation

¹Department of Prosthetic Dentistry, College of Dentistry, Jouf University, Sakaka 72345, Aljouf, Saudi Arabia; ²Department of fixed Prosthodontics, Beni-Suef University, Egypt; *Corresponding author

Email

Abdulrahman Ahmed Ismail - E-mail: abadyismail28@gmail.com
Shouq Abdulrahman AlMathami - E-mail: shou8.3.m@hotmail.com
Mohammed Ghazi Sghaireen - E-mail: abadyismail28@gmail.com
Doaa Abdelaziz A. Helal - E-mail: dr.mohammed.sghaireen@jodent.org

Article Type

Research Article

Date

Received April 1, 2026; Revised April 30, 2026; Accepted April 30, 2026, Published April 30, 2026

Abstract

Objective assessment of key smile aesthetic parameters such as buccal corridor width, midline deviation and gingival display remains insufficiently standardized across populations. Therefore, it is of interest to evaluate these parameters in 200 young adults with natural dentition using calibrated digital photographic analysis and software-based measurements. Standardized frontal smile photographs were analyzed to determine buccal corridor width ratio, maxillary midline deviation relative to facial midline and gingival display classification. The results showed a mean buccal corridor width ratio of 72.84 ± 6.32%, centered midline in 78.3% of participants and average gingival display in 55.0%, with significant gender differences observed in buccal corridor and gingival display. Thus, we show that moderate buccal corridor width, centered midline and average gingival display are common features, with minor midline deviations within 2 mm being clinically acceptable, supporting the use of digital photographic analysis for reliable aesthetic evaluation.

Keywords

Smile esthetics; buccal corridor; gingival display; midline deviation; digital smile analysis; photographic analysis

Citation

Ismail et al. Bioinformation 22(4): 2507-2513 (2026)

Edited by

Hiroj Bagde

ISSN

0973-2063

Publisher

Biomedical Informatics

License

This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.