Results of the surgical treatment of concomitant strabismus with preliminary modeling of operation by using three-dimensional biomechanical eye's model

2014 ◽  
Vol 92 ◽  
pp. 0-0
Author(s):  
NN BUSHUYEVA ◽  
DV ROMANENKO
Keyword(s):  
Surgical Treatment ◽  
Three Dimensional ◽  
Concomitant Strabismus

scholarly journals Facial Mobility after Maxilla-Mandibular Advancement in Patients with Severe Obstructive Sleep Apnea Syndrome: A Three-Dimensional Study

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Laura Verzé ◽  
Francesca Antonella Bianchi ◽  
Niccolò Barla ◽  
Serena Maria Curti ◽  
Giovanni Gerbino ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Surgical Treatment ◽  
Sleep Apnea ◽  
Obstructive Sleep Apnea Syndrome ◽  
Sleep Apnea Syndrome ◽  
Three Dimensional ◽  
Severe Obstructive Sleep Apnea ◽  
Facial Movements ◽  
Obstructive Sleep ◽  
Apnea Syndrome

Introduction. The functional results of surgery in terms of facial mobility are key elements in the treatment of patients. Little is actually known about changes in facial mobility following surgical treatment with maxillomandibular advancement (MMA). Objectives. The three-dimensional (3D) methods study of basic facial movements in typical OSAS patients treated with MMA was the topic of the present research. Materials and Methods. Ten patients affected by severe obstructive sleep apnea syndrome (OSAS) were engaged for the study. Their facial surface data was acquired using a 3D laser scanner one week before (T1) and 12 months after (T2) orthognathic surgery. The facial movements were frowning, grimace, smiling, and lip purse. They were described in terms of surface and landmark displacements (mm). The mean landmark displacement was calculated for right and left sides of the face, at T1 and at T2. Results. One year after surgery, facial movements were similar to presurgical registrations. No modifications of symmetry were present. Conclusions. Despite the skeletal maxilla-mandible expansion, orthognathic surgical treatment (MMA) of OSAS patients does not seem to modify facial mobility. Only an enhancement of amplitude in smiling and knitting brows was observed. These results could have reliable medical and surgical applications.

The Use of Eye Tracking to Discern the Threshold at Which Metopic Orbitofrontal Deformity Attracts Attention

2020 ◽  
Vol 57 (12) ◽  
pp. 1392-1401
Author(s):  
Mark P. Pressler ◽  
Emily L. Geisler ◽  
Rami R. Hallac ◽  
James R. Seaward ◽  
Alex A. Kane
Keyword(s):  
Surgical Treatment ◽  
Graduate Students ◽  
Eye Tracking ◽  
Dwell Time ◽  
Surgical Intervention ◽  
Three Dimensional ◽  
Average Dwell Time ◽  
Eye Tracker ◽  
Gaze Patterns ◽  
Areas Of Interest

Introduction and Objectives: Surgical treatment for trigonocephaly aims to eliminate a stigmatizing deformity, yet the severity that captures unwanted attention is unknown. Surgeons intervene at different points of severity, eliciting controversy. This study used eye tracking to investigate when deformity is perceived. Material and Methods: Three-dimensional photogrammetric images of a normal child and a child with trigonocephaly were mathematically deformed, in 10% increments, to create a spectrum of 11 images. These images were shown to participants using an eye tracker. Participants’ gaze patterns were analyzed, and participants were asked if each image looked “normal” or “abnormal.” Results: Sixty-six graduate students were recruited. Average dwell time toward pathologic areas of interest (AOIs) increased proportionally, from 0.77 ± 0.33 seconds at 0% deformity to 1.08 ± 0.75 seconds at 100% deformity ( P < .0001). A majority of participants did not agree an image looked “abnormal” until 90% deformity from any angle. Conclusion: Eye tracking can be used as a proxy for attention threshold toward orbitofrontal deformity. The amount of attention toward orbitofrontal AOIs increased proportionally with severity. Participants did not generally agree there was “abnormality” until deformity was severe. This study supports the assertion that surgical intervention may be best reserved for more severe deformity.

scholarly journals Customized acrylic implants for reconstruction of extensive skull defects: an exception approach for selected patients

2017 ◽  
Vol 44 (2) ◽  
pp. 154-162 ◽  
Author(s):  
RAFAEL DENADAI PIGOZZI DA SILVA ◽  
CESAR AUGUSTO RAPOSO-AMARAL ◽  
MARCELO CAMPOS GUIDI ◽  
CASSIO EDUARDO RAPOSO-AMARAL ◽  
CELSO LUIZ BUZZO
Keyword(s):  
Surgical Treatment ◽  
Retrospective Analysis ◽  
Three Dimensional ◽  
Surgical Results ◽  
Facial Symmetry ◽  
Skull Defects ◽  
Additional Surgery

ABSTRACT Objective: to present our experience in the surgical treatment of extensive skullcap defects with customized acrylic implants. Methods: we conducted a retrospective analysis of patients with extensive skull defects undergoing acrylic cranioplasties between 2004 and 2013. We carefully selected all patients and classified surgical results based on three scales (craniofacial esthetics, improvement of facial symmetry and need for additional surgery). Results: fifteen patients underwent cranioplasty with intraoperative acrylic implants, whether manually customized (46.67%) or made with prototyped three-dimensional biomodels (53.33%). There were two (13.33%) complications (one infection with implant withdrawal and one seroma). We considered the craniofacial aesthetics excellent (50%), the degree of improvement of craniofacial symmetry satisfactory (57.14%), and the overall mean of surgical results according to the need for new surgeries was 1.5±0.52. Conclusion: cranioplasties of patients with extensive skullcap defects should obey careful and predetermined criteria, both for selection and for the acrylic implant customization method.

scholarly journals 3D Rotational Angiography: Recent Experience in the Evaluation of Cerebral Aneurysms for Treatment

2000 ◽  
Vol 6 (2) ◽  
pp. 85-94 ◽  
Author(s):  
S. Ishihara ◽  
I.B. Ross ◽  
M. Piotin ◽  
A. Weill ◽  
H. Aerts ◽  
...  
Keyword(s):  
Decision Making ◽  
Surgical Treatment ◽  
Endovascular Treatment ◽  
Three Dimensional ◽  
Cerebral Aneurysms ◽  
Early Experience ◽  
Recent Experience ◽  
Rotational Angiography ◽  
3D Images ◽  
3D Rotational Angiography

Three dimensional (3D) reconstruction techniques providing volume rendered 3D images from rotational angiography data now exist. We report the design and early experience with one such system. 237 aneurysms were studied. Information was obtained on the morphology of the aneurysm itself and the vascular architecture in and around the aneurysm. 218 (92%) aneurysms went on to have endovascular treatment. The 3D images provided valuable information on aneurysmal anatomy, including relationships with the parent and adjacent vessels. This technique allowed fast and safe decision-making regarding the feasibility of endovascular or surgical treatment and provided useful information for performing the chosen treatment.

Three-dimensional Reconstructed Images after Rotational Angiography in the Evaluation of Intracranial Aneurysms: Surgical Correlation

Neurosurgery ◽  
2000 ◽  
Vol 47 (4) ◽  
pp. 866-871 ◽  
Author(s):  
Shuichi Tanoue ◽  
Hiro Kiyosue ◽  
Hiroyuki Kenai ◽  
Takaharu Nakamura ◽  
Masanori Yamashita ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Intracranial Aneurysms ◽  
Surface Display ◽  
Three Dimensional ◽  
Cerebral Aneurysms ◽  
Maximum Intensity Projection ◽  
Rotational Angiography ◽  
Neck Size ◽  
Visualization Techniques ◽  
Biplane Angiography

Abstract OBJECTIVE To evaluate the diagnostic accuracy of three-dimensional reconstructed images from rotational subtraction angiography in the surgical treatment of intracranial aneurysms. METHODS Twenty-two patients with 34 intracranial aneurysms underwent biplane angiography (40 degrees per s, 4.5 degrees per image, 8.8 frames per s). Three-dimensional (3-D) reconstructed images were obtained at a separate Advantage 3.1 workstation (General Electric, Milwaukee, WI) after the rotational images were transferred. The available visualization techniques included maximum intensity projection, shaded surface display, and virtual endoluminal view. All images were evaluated in correlation with intrasurgical visual data recorded on videotapes. RESULTS 3-D reconstructed images correlated well with surgical findings. The shape of the aneurysms, their neck size, and their relationships to the parent vessels and other branches were depicted clearly, especially compared with images obtained by two-dimensional conventional subtraction angiography and magnetic resonance angiography. CONCLUSION 3-D subtraction angiography enables the surgeon to understand the 3-D structure of lesions and is very useful in planning the surgical treatment of cerebral aneurysms.

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