Optimal Graft Thickness for Different Sizes of Tympanic Membrane Perforation in Cartilage Myringoplasty: A Finite Element Analysis

Lee, Chia-Fone; Chen, Jyh-Horng; Chou, Yung-Fa; Hsu, Lee-Ping; Chen, Peir-Rong; Liu, Tien‐Chen

doi:10.1097/mlg.0b013e318031f0e7

Cited by 56 publications

(40 citation statements)

References 21 publications

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“…But, the specimen has to be decalcified and embedded before the actual risky process of sectioning and mounting the slices on microscope glass plates. In 2007, Lee et al develop a finite element model using high-resolution computed tomography for cartilage myringoplasty [8]. However, some factors have not been considered in Lee's model, e.g., the middle cavity and the canal.…”

mentioning

confidence: 98%

Numerical analysis of ossicular chain lesion of human ear

Liu

Sun

2008

Acta Mech Sin

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Lesion of ossicular chain is a common ear disease impairing the sense of hearing. A comprehensive numerical model of human ear can provide better understanding of sound transmission. In this study, we propose a three-dimensional finite element model of human ear that incorporates the canal, tympanic membrane, ossicular bones, middle ear suspensory ligaments/muscles, middle ear cavity and inner ear fluid. Numerical analysis is conducted and employed to predict the effects of middle ear cavity, malleus handle defect, hypoplasia of the long process of incus, and stapedial crus defect on sound transmission. The present finite element model is shown to be reasonable in predicting the ossicular mechanics of human ear.

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mentioning

confidence: 98%

Numerical analysis of ossicular chain lesion of human ear

Liu

Sun

2008

Acta Mech Sin

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“…Lee et al [11] have developed a cartilage plate-TMcoupled model using high-resolution computed tomography and finite element analysis and from their study they concluded that the optimal thickness of a cartilage graft for myringoplasty appears to be 0.1-0.2 mm for medium and large TM perforations. For small perforations, a cartilage of less than 1.0 mm is a good compromise between mechanical stability and low acoustic transfer loss.…”

Section: Discussionmentioning

confidence: 98%

Comparison of Partial Thickness and Full Thickness Tragal Cartilage Graft During Modified Cartilage Shield Tympanoplasty for Type I Procedures

Vadiya

Bhatt

2015

Indian J Otolaryngol Head Neck Surg

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To compare the results, in terms of graft uptake and hearing improvement, of modified cartilage shield technique of tympanoplasty using either partial thickness tragal cartilage or full thickness tragal cartilage for type I procedures. 35 patients were included in group A where a partial thickness tragal cartilage was used and 27 patients included in group B where a full thickness tragal cartilage was used for modified cartilage shield tympanoplasty. Audiometry done at 4 months after surgery and the results compared. The graft take up rate for both these techniques is excellent. There had been no statistically significant difference in hearing gain between these two groups, except at 4,000 Hz, where hearing gain had been more in group A than group B with P value being 0.027. The modified cartilage shield tympanoplasty is a good technique for closure of tympanic membrane perforations. Hearing gain is very much similar between thin and thick cartilage groups, except at 4,000 Hz.

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“…16,27,30 The FE model can be used in our previous study on umbo and stapes vibration or Plontake's study on drugs applied to the round window membrane. 16,27,30 To prepare for FE model of the ear, all surfaces of the solid model were translated into two commercial FE model construction packages, Patran (MSC Software, Perth, Australia) and ANSYS (ANSYS, Canonsburg, PA, USA). Based on these surfaces, FE meshes of the ear were created by means of automatic and manual meshing capabilities in Patran.…”

Section: Image Processing and 3-d Reconstructionmentioning

confidence: 99%

“…6,8,11,13,15,19,22 Such an understanding could help us improve the design and function of prostheses and improve methodologies and planning of surgical procedures in the middle ear. 16,17,19 These aims require the modeling of all structures of the hearing organ, including bones and soft-tissue structure. 28 Previous studies have shown that the size and shape of structures change along the cochlea.…”

Section: Introductionmentioning

confidence: 99%

Registration of Micro-Computed Tomography and Histological Images of the Guinea Pig Cochlea to Construct an Ear Model Using an Iterative Closest Point Algorithm

Lee

Wan

et al. 2010

Ann Biomed Eng

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We present a practical and systematic method to reconstruct accurate physical models of the guinea pig ear (n = 1). The method uses a semi-automatic technique to create three-dimensional (3-D) models of the guinea pig cochlea by registration of micro-computed tomography (CT) and histological images. An iterative closest point algorithm was employed to minimize the sum of square errors with respect to the closest histological model and corresponding micro-CT model. This allowed creation of an accurate geometric ear model including external ear canal, tympanic membrane, middle ear cavity, auditory ossicles, and the cochlea. The characteristic cross-sectional areas of scala tympani, scala vestibuli, and scala media were measured. The length, thickness, and apex width of the guinea pig's basilar membrane were compared to the data found in literature. Some shape parameters were also compared among different species. The results confirmed that the geometric model created by this method was accurate. This method provides an effective way to visualize the 3-D structure and the detailed information about ear geometry required for finite element and multibody dynamic analysis.

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Optimal Graft Thickness for Different Sizes of Tympanic Membrane Perforation in Cartilage Myringoplasty: A Finite Element Analysis

Cited by 56 publications

References 21 publications

Numerical analysis of ossicular chain lesion of human ear

Numerical analysis of ossicular chain lesion of human ear

Comparison of Partial Thickness and Full Thickness Tragal Cartilage Graft During Modified Cartilage Shield Tympanoplasty for Type I Procedures

Registration of Micro-Computed Tomography and Histological Images of the Guinea Pig Cochlea to Construct an Ear Model Using an Iterative Closest Point Algorithm

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