scholarly journals Automatic planning of paediatric craniofacial deformities: new virtual facial-symmetry operative detection

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Giuditta Mannelli ◽  
Antonio Marzola ◽  
Francesco Buonamici ◽  
Yari Volpe ◽  
Francesca Uccheddu ◽  
...  
Keyword(s):  
Preoperative Planning ◽  
Maxillofacial Surgery ◽  
Central Element ◽  
Patient Specific ◽  
Surgical Approaches ◽  
Computer Assisted ◽  
Case Presentation ◽  
Non Invasive ◽  
Automatic Planning ◽  
Orbital Region

Background: The correction of craniofacial deformities is an ongoing challenge in maxillofacial surgery. However, conventional measurement methods for treatment planning are not appropriate for craniofacial surgery. Computer-assisted approaches can improve surgical outcomes. A new, non-invasive, patient-specific automatic method, proposed here, has been tested for assisting the surgeon in preoperative planning. Case Presentation: In the case reported, the described method allows effective surgery planning that led to a significant decrease in asymmetries in the orbital region. Conclusion: The multidisciplinary collaborative approach is a central element for the construction of effective personalized procedures and for the conception of new surgical approaches. The here proposed technology offers a good level of feasibility and has an achievable potential for breakthroughs in the improvement of facial deformities surgical treatment, thus representing an overwhelmingly useful tool in a clinical setting.

scholarly journals Computer-Assisted Planning and Three-Dimensional-Printed Patient-Specific Instrumental Guide for Corrective Osteotomy in Post-Traumatic Femur Deformity: A Case Report and Literature Review

2018 ◽  
Vol 24 (1) ◽  
pp. 12-17 ◽  
Author(s):  
Lau Chi-Kay ◽  
Chui King-him ◽  
Lee Kin-bong ◽  
Li Wilson
Keyword(s):  
Lower Limb ◽  
New Technologies ◽  
Preoperative Planning ◽  
Corrective Osteotomy ◽  
Three Dimensional ◽  
Patient Specific ◽  
Computer Assisted ◽  
Limb Deformity ◽  
Satisfactory Outcome ◽  
Post Traumatic

Post-traumatic limb deformity is often multiplanar and thus is a difficult pathology to deal with surgically. Precise preoperative planning and accurate intraoperative execution are two main important steps that lead to satisfactory outcome. Computer-assisted planning and three-dimensional-printed patient-specific instrumental guides provide excellent aid to the two steps, respectively. We report a case of posttraumatic lower limb deformity in a patient who underwent closing wedge corrective osteotomy with the aid of the aforementioned new technologies.

Computer-Aided Design and Manufacturing of a Novel Maxillofacial Surgery Instrument: Application in the Sagittal Split Osteotomy

2016 ◽  
Vol 10 (4) ◽  
Author(s):  
Erol Cansiz ◽  
Fatih Turan ◽  
Yunus Ziya Arslan
Keyword(s):  
Computer Aided Design ◽  
Maxillofacial Surgery ◽  
Inferior Alveolar Nerve ◽  
Patient Specific ◽  
Computer Assisted ◽  
Lateral Side ◽  
Sagittal Split Osteotomy ◽  
Surgical Application

Mandibular sagittal split osteotomy (SSO) is an operation performed for the correction of mandibular deformities. In this operation, sharp rotary tools are used during osteotomies and this can induce some complications. For example, if the inferior alveolar nerve is damaged, paralysis of the teeth, the lateral side of the tongue, and the corner of the lip can occur. To decrease the occurrence of such possible complications, we designed and manufactured a novel computer-assisted, patient-specific SSO guide and soft tissue retractor in our previous study. And, we first tested this apparatus on a cadaveric bone in vitro. Now, in this study, a surgical application of the instrument, which was designed and manufactured according to the requirements of the mandibular sagittal split osteotomies, was performed. This paper gives and discusses the results obtained from in vivo application of the apparatus.

scholarly journals How precise are oral splints for frameless stereotaxy in guided ear, nose, throat, and maxillofacial surgery: a cadaver study

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Manfred Nilius ◽  
Minou Hélène Nilius
Keyword(s):  
Bone Markers ◽  
Maxillofacial Surgery ◽  
Computer Assisted Surgery ◽  
Ct Scanning ◽  
Cadaver Study ◽  
Computer Assisted ◽  
Frameless Stereotaxy ◽  
Fiducial Markers ◽  
Linear Regression Models ◽  
Non Invasive

Abstract Background Computer-assisted surgery optimises accuracy and serves to improve precise surgical procedures. We validated oral splints with fiducial markers by testing them against rigid bone markers. Methods We screwed twenty bone anchors as fiducial markers into different regions of a dried skull and measured the distances. After computed tomography (CT) scanning, the accuracy was evaluated by determining the markers’ position using frameless stereotaxy on a dry cadaver and indicated on the CT scan. We compared the accuracy of chairside fabricated oral splints to standard registration with bone markers immediately after fabrication and after a ten-time use. Accuracy was calculated as deviation (mean ± standard deviation). For statistical analysis, t test, Kruskal-Wallis, Tukey's, and various linear regression models, such as the Pearson's product–moment correlation coefficient, were used. Results Oral splints showed an accuracy of 0.90 mm ± 0.27 for viscerocranium, 1.10 mm ± 0.39 for skull base, and 1.45 mm ± 0.59 for neurocranium. We found an accuracy of less than 2 mm for both splints for a distance of up to 152 mm. The accuracy persisted even after ten times removing and reattaching the splints. Conclusions Oral splints offer a non-invasive indicator to improve the accuracy of image-guided surgery. The precision is dependent on the distance to the target. Up to 150-mm distance, a precision of fewer than 2 mm is possible. Dental splints provide sufficient accuracy than bone markers and may opt for higher precision combined with other non-invasive registration methods.

Intraoperative accuracy of non-invasive registration in computer assisted cranio–maxillofacial surgery

2001 ◽  
Vol 1230 ◽  
pp. 1239-1240 ◽  
Author(s):  
A. Schramm ◽  
N.-C. Gellrich ◽  
M. Nilus ◽  
R. Schön ◽  
R. Schimming ◽  
...  
Keyword(s):  
Maxillofacial Surgery ◽  
Computer Assisted ◽  
Non Invasive

scholarly journals Liver 3D modeling and hepatectomy simulation for the residents’ preoperative education

2015 ◽  
Author(s):  
Apollon Zygomalas ◽  
Vasileios Megalooikonomou ◽  
Dimitrios Koutsouris ◽  
Dimitrios Karavias ◽  
Ioannis Karagiannidis ◽  
...  
Keyword(s):  
Liver Resection ◽  
3D Modeling ◽  
Preoperative Planning ◽  
Medical Images ◽  
Patient Specific ◽  
Computer Assisted ◽  
Liver Imaging ◽  
Liver Segmentation ◽  
Preoperative Education ◽  
Liver Remnant

Background. Liver segmentation from medical images produces high quality patient specific 3D liver models which are used for preoperative planning and intraoperative guidance. These 3D models can be manipulated and visualized in various ways and can be useful for residents’ education. Objective. The aim of this study was to evaluate the implementation of a novel liver segmentation and hepatectomy simulation application as a tool for the residents’ preoperative education. Method. We developed in MATLAB® 2013a a liver segmentation and preoperative planning application. Ten liver imaging datasets of a prospectively selected random sample of patients undergoing elective hepatectomies at our institution were used for liver segmentation and 3D modeling. Residents were asked to identify anatomical and pathological structures and propose liver resection plans. Intraoperatively, they could consult the computer models in real time. Their surgical scenarios were evaluated and discussed with specialized liver surgeons. Learning objectives were defined and their accomplishment was evaluated using the Kirkpatrick’s four levels model. Results. The residents learned to 1) identify anatomical and pathological structures 2) calculate future liver remnant volume (FLR) from segmented liver images 3) propose liver resection plans based on FLR and liver vascular tree and tumor relations 4) consult liver medical images (CT and MRI) 5) understand the role of computer assisted surgery. They evaluated in-vivo their preoperative planning decisions and understood better the surgical operations. Conclusions. Our proposed liver segmentation and hepatectomy simulation application appears to be appropriate for the preoperative education of resident surgeons.

Computer Assisted Guided Placement of IMF Screws in Craniomaxillofacial Trauma: An Evolving Technique

FACE ◽  
2021 ◽  
pp. 273250162110086
Author(s):  
Joseph Kamal Muhammad
Keyword(s):  
Maxillofacial Surgery ◽  
Operation Time ◽  
Technical Note ◽  
Patient Specific ◽  
Computer Assisted ◽  
Intermaxillary Fixation ◽  
Surgical Guides ◽  
Craniomaxillofacial Trauma ◽  
Potential Benefits ◽  
Maxilla And Mandible

Intermaxillary fixation (IMF) screws have been introduced into maxillofacial trauma practice to reduce operation time and the complications associated with the placement of wire ligatures around teeth. Wires continue to be used to secure arch bars to teeth, form eyelets and long ligatures prior to putting a patient into maxillomandibular fixation (MMF). The application of wires to dental arches may result in sharp injuries to the operator, whereas injury to roots and nerves may arise from incorrect positioning of IMF screws in the jaws. The purpose of this technical note is to demonstrate how 3D patient specific (PS) surgical guides can be planned and fabricated to assist in the safe placement of IMF screws in the maxilla and mandible. It is proposed that PS IMF screw guides can be further developed to incorporate removable spoons and semi-circular access ports that not only facilitate safe screw placement but allow the guide to remain in position until all screw are secured. The potential benefits of PS IMF surgical guides include diminished risk of injury to facial structures and reduced operation time. The technique also lends itself to the placement of IMF screws via a robotic arm contributing to a safer operating environment for the maxillofacial surgery team.

Haptic computer-assisted patient-specific preoperative planning for orthopedic fractures surgery

2015 ◽  
Vol 10 (10) ◽  
pp. 1535-1546 ◽  
Author(s):  
I. Kovler ◽  
L. Joskowicz ◽  
Y. A. Weil ◽  
A. Khoury ◽  
A. Kronman ◽  
...  
Keyword(s):  
Preoperative Planning ◽  
Patient Specific ◽  
Computer Assisted

scholarly journals Orbital Fractures

2021 ◽  
pp. 1201-1250
Author(s):  
Ananthanarayanan Parameswaran ◽  
Madhulaxmi Marimuthu ◽  
Shreya Panwar ◽  
Beat Hammer
Keyword(s):  
Computer Assisted Surgery ◽  
Patient Specific ◽  
Surgical Approaches ◽  
Computer Assisted ◽  
Management Options ◽  
Orbital Trauma ◽  
Young Surgeon ◽  
Patient Specific Implants ◽  
Clinical Overview

AbstractSurgery for orbital trauma is challenging. A good understanding of the orbit, its normal form, function, and the varying patterns of its disruption due to trauma is essential for its proper management. The aim of this chapter is to provide a comprehensive clinical overview of all facets of orbital trauma for the young surgeon. The chapter has been structured to include the basics of (i) anatomy, (ii) biomechanics of injury, (iii) classification and their clinical implications, (iv) surgical approaches and (v) management options available for individual types of fractures. Special features of this chapter include descriptions of clinical features exclusive to orbital trauma with a section for management of orbital emergencies. A detailed note is provided for the management of fractures of the orbital floor including guidelines for deep orbital dissection and elaboration of the principles of reconstruction. The role of computer assisted surgery, intra-operative navigation and patient specific implants has also been added to explain the recent advances in this field of surgery.

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