Three dimensional evaluation of facial asymmetry after mandibular reconstruction: validation of a new method using stereophotogrammetry

Verhoeven, Tim J.; Coppen, Casper; Barkhuysen, R.; Bronkhorst, Ewald M.; Merkx, Matthias A.W.; Bergé, Stefaan; Maal, T.J.J.

doi:10.1016/j.ijom.2012.05.036

Cited by 58 publications

(39 citation statements)

References 25 publications

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“…The method is a modified version of the method described by Verhoeven et al in 2012 [10]. The intra- and inter-observer performance scores (0.02 mm and 0.04 mm respectively) of the method described by Verhoeven et al were mainly influenced by two manually performed steps in the procedure.…”

Section: Discussionmentioning

confidence: 99%

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Unilateral Condylar Hyperplasia: A 3-Dimensional Quantification of Asymmetry

et al. 2013

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PurposeObjective quantifications of facial asymmetry in patients with Unilateral Condylar Hyperplasia (UCH) have not yet been described in literature. The aim of this study was to objectively quantify soft-tissue asymmetry in patients with UCH and to compare the findings with a control group using a new method.Material and MethodsThirty 3D photographs of patients diagnosed with UCH were compared with 30 3D photographs of healthy controls. As UCH presents particularly in the mandible, a new method was used to isolate the lower part of the face to evaluate asymmetry of this part separately. The new method was validated by two observers using 3D photographs of five patients and five controls.ResultsA significant difference (0.79 mm) between patients and controls whole face asymmetry was found. Intra- and inter-observer differences of 0.011 mm (−0.034–0.011) and 0.017 mm (−0.007–0.042) respectively were found. These differences are irrelevant in clinical practice.ConclusionAfter objective quantification, a significant difference was identified in soft-tissue asymmetry between patients with UCH and controls. The method used to isolate mandibular asymmetry was found to be valid and a suitable tool to evaluate facial asymmetry.

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Section: Discussionmentioning

confidence: 99%

“…Asymmetry quantification of the whole face was achieved using an existing method priorly published by Verhoeven et al [10], which includes the following steps:…”

Section: Methodsmentioning

confidence: 99%

Unilateral Condylar Hyperplasia: A 3-Dimensional Quantification of Asymmetry

et al. 2013

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“…The four-step method to quantify soft-tissue facial asymmetry described by Verhoeven et al was applied in this study [28]. Because the original method evaluates facial asymmetry and the aim of this study was to quantify nasolabial asymmetry, the method was supplemented with additional steps.…”

Section: Calculation Of Mean Absolute Nasolabial Asymmetrymentioning

confidence: 99%

Nasolabial symmetry and esthetics in cleft lip and palate: analysis of 3D facial images

et al. 2015

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“…IH height and volume were determined using a distance map (3dMD Vultus Software, 3dMD, Atlanta, GA, USA). 49 …”

Section: Methodsmentioning

confidence: 99%

Infantile hemangioma status by dynamic infrared thermography: A preliminary study

et al. 2016

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Background Infantile hemangiomas (IH) are initially warm due to increased proliferation perfusion then involute with apoptosis and reduced perfusion. Objective quantitative evaluation of IH treatment response is essential for improving outcomes. We applied a functional imaging method, dynamic infrared (IR) thermography, to investigate IH status versus control skin and over time. Materials and Methods A preliminary prospective observational study was conducted among twenty-five subjects with superficial or mixed IHs (< 19 months) over 59 clinic visits. Infrared images of IHs and control sites, standardized color images and three-dimensional images were obtained. Tissue responses following application and removal of a cold stress were recorded with video IR thermography. Outcomes included areas under the curve during cooling (AUCcool) and rewarming (AUCrw) and thermal intensity distribution maps. Results AUCcool and AUCrw were significantly higher and cooling rate slower for IHs versus uninvolved tissue indicating greater heat, presumably due to greater perfusion and metabolism for the IH. IR distribution maps showed specific areas of high and low temperature. Significant changes in IH thermal activity were reflected in the difference (AUCcool – AUCrw), with 6.2 at 2.2 months increasing to 37.6 at 12.8 months. IH cooling rate increased with age, indicating slower recovery, and interpreted as reduced proliferation and/or involution. Conclusions Dynamic IR thermography was a well-tolerated, quantitative functional imaging modality appropriate for the clinic, particularly when structural changes, i.e., height, volume, color, were not readily observed. It may assist in monitoring progress, individualizing treatment and evaluating therapies.

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Three dimensional evaluation of facial asymmetry after mandibular reconstruction: validation of a new method using stereophotogrammetry

Cited by 58 publications

References 25 publications

Unilateral Condylar Hyperplasia: A 3-Dimensional Quantification of Asymmetry

Unilateral Condylar Hyperplasia: A 3-Dimensional Quantification of Asymmetry

Nasolabial symmetry and esthetics in cleft lip and palate: analysis of 3D facial images

Infantile hemangioma status by dynamic infrared thermography: A preliminary study

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