Three-dimensional autologous cartilage framework fabrication assisted by new additive manufactured ear-shaped templates for microtia reconstruction

Zhou, Jiayu; Pan, Bo; Yang, Qinghua; Zhao, Yang; Ling, He; Lin, Lin; Sun, Huai; Song, Yupeng; Yu, Xin; Sun, Zhongyang; Jiang, Haiyue

doi:10.1016/j.bjps.2016.06.011

Cited by 34 publications

(35 citation statements)

References 19 publications

(15 reference statements)

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“…A previous study has demonstrated minimal differences in the screenshots of specimen surfaces obtained using a CT scan and an Artec Space Spider scanner (19). Blue light 3D scanning technology used in the Artec Spider does not emit radiation during the scanning process and is therefore harmless to patients (20).…”

Section: Discussionmentioning

confidence: 99%

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Standardized measurement of auricle: A method of high‑precision and reliability based on 3D scanning and Mimics software

et al. 2019

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Objective measurement is important for diagnosing congenital or acquired auricular abnormalities and the evaluation of therapeutic efficacy. However, methods applied in the past were mostly inaccurate and unreliable. The present study aimed to introduce five standardized indices for auricle measurement and present a highly precise and reliable methodology combining three-dimensional (3D) scanning techniques and the Materialise Mimics software for the evaluation of auricle sizes. A total of 20 normal ears were measured independently by four surgeons using the standardized digital method with 3D scanning technique and the traditional manual method. Parameters of the auricle, including the length and width, arc length, cranioauricular height and angle were measured using the Mimics software. Paired t-test, Wilcoxon signed rank test and intra-class correlation coefficients (ICC) were performed on the data to assess the precision, uniformity and observer independence of the method. Pearson's product moment correlation was calculated to assess the correlation between auricle length and width in addition to the correlation between cranioauricular height and angle. No significant differences were indicated between measurements of five auricular parameters made by two surgeons using the digital method. However, significant differences were found using the manual method (P<0.01). ICC values derived from digital measurements ranged from 0.901 to 0.987, whereas those derived from manual measurements ranged from 0.526 to 0.807. These results suggested that the standardized digital method was replicable and reliable compared with the traditional manual method. Pearson's coefficient analysis showed that there was a significant correlation between cranioauricular height and angle (P<0.05), but no correlations were found between the height and width of the auricle (P>0.05). Taken together, data from the present study suggested that measurements of the length and width, arch length, and cranioauricular height and angle of auricles using the standardized digital method combining 3D scanning with the Mimics software were comprehensive, precise, convenient, repeatable and reliable.

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Section: Discussionmentioning

confidence: 99%

“…Some diagnosis of ear deformations such as the prominent ear is dependent on cranioauricular angles (7). In addition, CH and CA are the key indices in diagnosing microtia (20). The ALA is becoming a very promising index in the diagnosis of constricted ear and other abnormalities which are associated with substantial helix changes (29).…”

Section: Discussionmentioning

confidence: 99%

Standardized measurement of auricle: A method of high‑precision and reliability based on 3D scanning and Mimics software

et al. 2019

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“…However, this approach has several limitations; first of all, the X-ray film-based acquisition is affected by an error due to the pressure that is exerted on the ear while the silhouette is traced. Such a pressure, in fact, causes a deformation of the external ear, thus leading to an inaccurate drawing of the structure [63]. Furthermore, the 2D template does not convey the necessary information about the three-dimensional geometry of the ear, i.e., height, thickness, depth features of the anatomical elements of the ear structure (helix, antihelix, tragus–antitragus, concha, and scapha [64]).…”

Section: Methods To Simulate Ear Reconstructionmentioning

confidence: 99%

“…Zhou et al [63] used a 3D scanner (Artec Spider, Artec Group, 11,000 €) with a resolution of 0.1 mm to obtain the auricular structure of 40 subjects affected by microtia. Data were processed using a Reverse Engineering CAD software (Geomagic Studio, 3D Systems, Rock Hill, SC, USA) and two different templates of the affected ear were designed and printed: a 2D sheet ear-shaped mold and a 3D template.…”

Section: Methods To Simulate Ear Reconstructionmentioning

confidence: 99%

Ear Reconstruction Simulation: From Handcrafting to 3D Printing

et al. 2019

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Microtia is a congenital malformation affecting one in 5000 individuals and is characterized by physical deformity or absence of the outer ear. Nowadays, surgical reconstruction with autologous tissue is the most common clinical practice. The procedure requires a high level of manual and artistic techniques of a surgeon in carving and sculpting of harvested costal cartilage of the patient to recreate an auricular framework to insert within a skin pocket obtained at the malformed ear region. The aesthetic outcomes of the surgery are highly dependent on the experience of the surgeon performing the surgery. For this reason, surgeons need simulators to acquire adequate technical skills out of the surgery room without compromising the aesthetic appearance of the patient. The current paper aims to describe and analyze the different materials and methods adopted during the history of autologous ear reconstruction (AER) simulation to train surgeons by practice on geometrically and mechanically accurate physical replicas. Recent advances in 3D modelling software and manufacturing technologies to increase the effectiveness of AER simulators are particularly described to provide more recent outcomes.

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“…In most studies [4][5][6][7], the data from a patient's tomographic examination are used to create digital models. In [8][9][10], the photogrammetry method was applied to transform photographic images into a three-dimensional model. The analysis of the research shows that to create the most complete anatomical shape of the ear, especially with an internal structure, it is preferable to use the graphical data of the patient's tomographic examination.…”

Section: Introductionmentioning

confidence: 99%

The Significance of Computer Modeling and 3D Printing Technology for Facial Ectoprosthetics

Cherebylo

Vnuk

Ippolitov

et al. 2020

Proceedings of the 30th International Conference on Computer Graphics and Machine Vision (GraphiCon 2020). Part 2

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The integration of information technologies in healthcare practice significantly changes the methods of diagnosis and treatment, the forms of interaction of doctors with patients and colleagues, the organization of treatment and recovery of health. The field of reconstruction of the auricle is still a huge challenge for facial plastic surgeons and requires at various techniques to find the best treatment for each patient. The paper describes the application of computer modeling and laser stereolithography technology in surgical practice for auricular surfaces ectoprosthetics. To improve the accuracy and quality of the surgical intervention the positioning of external prosthesis is applied with the aid of personal templates and computer navigation. The accuracy of ectoprosthesis positioning when using a plastic mask template was 0.3-0.4 mm, while computer navigation was 0.1 - 0.2 mm. Using personalized templates is a simpler and more intuitive way of positioning that does not require expensive computer navigation systems. This example of ectoprosthetics shows the possibilities of various reconstructions of facial organs, not only the ear, but also, for example, the nose, using computer modeling and 3d printing technologies

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Three-dimensional autologous cartilage framework fabrication assisted by new additive manufactured ear-shaped templates for microtia reconstruction

Cited by 34 publications

References 19 publications

Standardized measurement of auricle: A method of high‑precision and reliability based on 3D scanning and Mimics software

Standardized measurement of auricle: A method of high‑precision and reliability based on 3D scanning and Mimics software

Ear Reconstruction Simulation: From Handcrafting to 3D Printing

The Significance of Computer Modeling and 3D Printing Technology for Facial Ectoprosthetics

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