Publications by authors named "Ryan P Leary"
Importance: The contribution of columellar strut grafts (CSGs) to nasal tip support has not been determined via structural mechanics. Optimal graft dimensions have yet to be objectively determined.
Objectives: To use a finite element model (FEM) of the human nose to (1) determine the effect of the CSG on nasal tip support and (2) identify how suture placement contributes to tip support.
A Finite Element Model to Simulate Formation of the Inverted-V Deformity.
JAMA Facial Plast Surg
July 2016
Article Synopsis
- Computational modeling, specifically using the finite element method (FEM), can help predict the long-term impacts of surgical procedures on the nasal structure, particularly the inverted-V deformity (IVD).
- The study utilized a computer-generated nose model based on human CT data to simulate various conditions: partial fusion and full separation of upper lateral cartilages (ULCs) from the nasal septum, alongside a control model.
- Results showed that complete separation of the ULCs led to significant stress and morphological changes in the nasal framework, illustrating the potential for FEM to assist in understanding complications arising from surgical techniques in rhinoplasty.
Finite Element Model Analysis of Cephalic Trim on Nasal Tip Stability.
JAMA Facial Plast Surg
April 2016
Article Synopsis
- Alar rim retraction commonly results from excessive resection of the lateral crural cartilage in rhinoplasty, but the remodeling process leading to this issue is poorly understood.
- The study aimed to model how trimming the cephalic portion of the cartilage affects stress distribution and internal forces in the nose during movements like tip depression.
- Using a finite element model, simulations showed that more aggressive cartilage trimming leads to higher stress and noticeable changes in nasal tip position, including alar rim retraction and upward rotation.
Objective: We employ a nasal tip finite element model (FEM) to evaluate contributions of two of the three major tip support mechanisms: attachments between the upper and lower lateral cartilages and attachment of the medial crura to the caudal septum.
Study Design: The nasal tip FEM computed stress distribution and strain energy density (SED) during nasal tip compression. We examined the impact of attachments between the upper and lower lateral cartilages and the attachment of the medial crura to the caudal septum on nasal tip support.