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Effect of Depressor Septi Nasi Muscle Activity on Nasal Lengthening With Time

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Abstract

Background

The depressor septi nasi (DSN) muscle is an important muscle in nose dynamics. Its hyperactivity causes smile deformity including nasal tip depression. The nasal tip of individuals with a hyperactive DSN muscle depresses repeatedly while they are speaking and smiling. This may result in nasal lengthening as they age.

Methods

Pairs of cases consisting of a child and one of his or her parents were studied in two groups: case group (with DSN muscle hyperactivity) and the control group (with DSN muscle inactivity in both child and parent). Nasal length from nasion to tip and facial length from nasion to menton were measured during repose and during smiling.

Results

This study investigated 80 pairs of children and parents. In both groups, a significant linear correlation between the nasal length of the parent and the child was found. In both groups (case and control), the nasal length of the child differed significantly from that of the parent. The increase in the nasal length of the parents compared with the children was greater in the control group.

Conclusions

This study demonstrated that nasal length increases with age and that DSN muscle hyperactivity is not an effective factor in this increase. This unpredictable result may affect the presumption that patients with DSN muscle hyperactivity will have longer noses in the future. Long-term prospective studies investigating cohort groups are required to clarify the variables affecting nasal lengthening with aging, and interventional studies are needed to examine the effects of DSN muscle resection on this phenomenon.

Level of Evidence III

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Acknowledgments

The results described in this study formed part of a thesis submitted by the fourth author for a postgraduate degree in general surgery. The study was supported by the Vice Chancellor of Research of Mashhad University of Medical Sciences.

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Authors and Affiliations

  1. Surgical Oncology Research Center, Imam Reza Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

    Arash Beiraghi-Toosi, Mehdi Jabbari Nooghabi & Shahram Izadpanah

  2. Endoscopic and Minimally Invasive Surgery Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

    Ezzatollah Rezaei

  3. Department of Statistics, Faculty of Mathematical Sciences, Ferdowsi University of Mashhad, Mashhad, Iran

    Mehdi Jabbari Nooghabi

Authors
  1. Arash Beiraghi-Toosi
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  2. Ezzatollah Rezaei
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  3. Mehdi Jabbari Nooghabi
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  4. Shahram Izadpanah
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Corresponding author

Correspondence to Arash Beiraghi-Toosi.

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Beiraghi-Toosi, A., Rezaei, E., Jabbari Nooghabi, M. et al. Effect of Depressor Septi Nasi Muscle Activity on Nasal Lengthening With Time. Aesth Plast Surg 37, 984–988 (2013). https://doi.org/10.1007/s00266-013-0137-x

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  • DOI: https://doi.org/10.1007/s00266-013-0137-x

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