The number of removed tracheal rings during laryngectomy does not seem to influence stoma depth. However, this study does not demonstrate that cleaving the sternocleidomastoid muscle (SCM) at the time of a laryngectomy will result in a geometrically flatter stoma.
van Kalkeren, T. A., van der Houwen, E. B., Duits, M. A. E., Hilgers, F. J., Hebe, A., Mostafa, B. E., Lawson, G., Martinez, Z., Woisard, V., Marioni, G., Ruske, D., Schultz, P., Post, W. J., Verkerke, B. J., & van der Laan, B. F. A. M. (2011). Worldwide, multicenter study of peristomal geometry and morphology in laryngectomees and its clinical effects. Head & Neck : journal for the sciences and specialities of the head and neck, 33(8), 1184-1190. https://doi.org/10.1002/hed.21595 (Original work published 2011)