scholarly journals Development, conception and modulization of patient-specific miniplate in maxillofacial surgery

2021 ◽  
pp. 100136
Author(s):  
Ouassime Kerdoud ◽  
Rachid Aloua ◽  
Faiçal Slimani ◽  
Abdellah Boualam
Keyword(s):  
Maxillofacial Surgery ◽  
Patient Specific

scholarly journals 3D printed bone models in oral and cranio-maxillofacial surgery: a systematic review

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Matteo Meglioli ◽  
Adrien Naveau ◽  
Guido Maria Macaluso ◽  
Sylvain Catros
Keyword(s):  
Systematic Review ◽  
Fused Deposition Modeling ◽  
Haptic Feedback ◽  
Treatment Time ◽  
Data Extraction ◽  
Meta Analysis ◽  
Maxillofacial Surgery ◽  
Patient Specific ◽  
Fused Deposition ◽  
3D Printed

Abstract Aim This systematic review aimed to evaluate the use of three-dimensional (3D) printed bone models for training, simulating and/or planning interventions in oral and cranio-maxillofacial surgery. Materials and methods A systematic search was conducted using PubMed® and SCOPUS® databases, up to March 10, 2019, by following the Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) protocol. Study selection, quality assessment (modified Critical Appraisal Skills Program tool) and data extraction were performed by two independent reviewers. All original full papers written in English/French/Italian and dealing with the fabrication of 3D printed models of head bone structures, designed from 3D radiological data were included. Multiple parameters and data were investigated, such as author’s purpose, data acquisition systems, printing technologies and materials, accuracy, haptic feedback, variations in treatment time, differences in clinical outcomes, costs, production time and cost-effectiveness. Results Among the 1157 retrieved abstracts, only 69 met the inclusion criteria. 3D printed bone models were mainly used as training or simulation models for tumor removal, or bone reconstruction. Material jetting printers showed best performance but the highest cost. Stereolithographic, laser sintering and binder jetting printers allowed to create accurate models with adequate haptic feedback. The cheap fused deposition modeling printers exhibited satisfactory results for creating training models. Conclusion Patient-specific 3D printed models are known to be useful surgical and educational tools. Faced with the large diversity of software, printing technologies and materials, the clinical team should invest in a 3D printer specifically adapted to the final application.

Is instant messaging the future of workplace communication for oral and maxillofacial surgery?

2015 ◽  
Vol 6 (4) ◽  
pp. 180-186 ◽  
Author(s):  
Cristina Verea Linares ◽  
Johno Breeze
Keyword(s):  
Instant Messaging ◽  
Maxillofacial Surgery ◽  
Mobile Telephone ◽  
Patient Specific ◽  
Oral And Maxillofacial Surgery ◽  
Junior Doctors ◽  
Specific Information ◽  
Workplace Communication ◽  
Phone Calls ◽  
Near Future

Mobile telephone texts are the primary method of communication among junior doctors, superseding phone calls and bleeps. However, instant messaging is now one of the most common methods of social communication worldwide, and will likely supersede texting in the near future – but concerns over its security suggest further research is urgently required into the content of such communications, if it is to transmit patient specific information.

scholarly journals Imaging, Virtual Planning, Design, and Production of Patient-Specific Implants and Clinical Validation in Craniomaxillofacial Surgery

2012 ◽  
Vol 5 (3) ◽  
pp. 137-143 ◽  
Author(s):  
Per Dérand ◽  
Lars-Erik Rännar ◽  
Jan-M Hirsch
Keyword(s):  
Additive Manufacturing ◽  
Treatment Plan ◽  
Maxillofacial Surgery ◽  
Bone Substitutes ◽  
Patient Specific ◽  
Virtual Design ◽  
Patient Specific Implants ◽  
Cutting Guide ◽  
Ablative Surgery ◽  
Cutting Guides

The purpose of this article was to describe the workflow from imaging, via virtual design, to manufacturing of patient-specific titanium reconstruction plates, cutting guide and mesh, and its utility in connection with surgical treatment of acquired bone defects in the mandible using additive manufacturing by electron beam melting (EBM). Based on computed tomography scans, polygon skulls were created. Following that virtual treatment plans entailing free microvascular transfer of fibula flaps using patient-specific reconstruction plates, mesh, and cutting guides were designed. The design was based on the specification of a Compact UniLOCK 2.4 Large (Synthes®, Switzerland). The obtained polygon plates were bent virtually round the reconstructed mandibles. Next, the resections of the mandibles were planned virtually. A cutting guide was outlined to facilitate resection, as well as plates and titanium mesh for insertion of bone or bone substitutes. Polygon plates and meshes were converted to stereolithography format and used in the software Magics for preparation of input files for the successive step, additive manufacturing. EBM was used to manufacture the customized implants in a biocompatible titanium grade, Ti6Al4V ELI. The implants and the cutting guide were cleaned and sterilized, then transferred to the operating theater, and applied during surgery. Commercially available software programs are sufficient in order to virtually plan for production of patient-specific implants. Furthermore, EBM-produced implants are fully usable under clinical conditions in reconstruction of acquired defects in the mandible. A good compliance between the treatment plan and the fit was demonstrated during operation. Within the constraints of this article, the authors describe a workflow for production of patient-specific implants, using EBM manufacturing. Titanium cutting guides, reconstruction plates for fixation of microvascular transfer of osteomyocutaneous bone grafts, and mesh to replace resected bone that can function as a carrier for bone or bone substitutes were designed and tested during reconstructive maxillofacial surgery. A clinically fit, well within the requirements for what is needed and obtained using traditional free hand bending of commercially available devices, or even higher precision, was demonstrated in ablative surgery in four patients.

A New Software Suite in Orthognathic Surgery : Patient Specific Modeling, Simulation and Navigation

2018 ◽  
Vol 26 (1) ◽  
pp. 5-20 ◽  
Author(s):  
Jean-Christophe Lutz ◽  
Alexandre Hostettler ◽  
Vincent Agnus ◽  
Stéphane Nicolau ◽  
Daniel George ◽  
...  
Keyword(s):  
Navigation System ◽  
Orthognathic Surgery ◽  
Soft Tissues ◽  
Maxillofacial Surgery ◽  
Patient Specific ◽  
Routine Practice ◽  
Software Suite ◽  
Augmented Virtuality ◽  
Dentofacial Deformities ◽  
Surgery Patient

Orthognathic surgery belongs to the scope of maxillofacial surgery. It treats dentofacial deformities consisting in discrepancy between the facial bones (upper and lower jaws). Such impairment affects chewing, talking, and breathing and can ultimately result in the loss of teeth. Orthognathic surgery restores facial harmony and dental occlusion through bone cutting, repositioning, and fixation. However, in routine practice, we face the limitations of conventional tools and the lack of intraoperative assistance. These limitations occur at every step of the surgical workflow: preoperative planning, simulation, and intraoperative navigation. The aim of this research was to provide novel tools to improve simulation and navigation. We first developed a semiautomated segmentation pipeline allowing accurate and time-efficient patient-specific 3D modeling from computed tomography scans mandatory to achieve surgical planning. This step allowed an improvement of processing time by a factor of 6 compared with interactive segmentation, with a 1.5-mm distance error. Next, we developed a software to simulate the postoperative outcome on facial soft tissues. Volume meshes were processed from segmented DICOM images, and the Bullet open source mechanical engine was used together with a mass-spring model to reach a postoperative simulation accuracy <1 mm. Our toolset was completed by the development of a real-time navigation system using minimally invasive electromagnetic sensors. This navigation system featured a novel user-friendly interface based on augmented virtuality that improved surgical accuracy and operative time especially for trainee surgeons, therefore demonstrating its educational benefits. The resulting software suite could enhance operative accuracy and surgeon education for improved patient care.

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 Adapting the Pore Size of Individual, 3D-Printed CPC Scaffolds in Maxillofacial Surgery

2021 ◽  
Vol 10 (12) ◽  
pp. 2654
Author(s):  
David Muallah ◽  
Philipp Sembdner ◽  
Stefan Holtzhausen ◽  
Heike Meissner ◽  
André Hutsky ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cell Migration ◽  
Pore Size ◽  
High Pressures ◽  
Maxillofacial Surgery ◽  
Patient Specific ◽  
Porous Scaffolds ◽  
Bone Augmentation ◽  
3D Printed

Three dimensional (3D) printing allows additive manufacturing of patient specific scaffolds with varying pore size and geometry. Such porous scaffolds, made of 3D-printable bone-like calcium phosphate cement (CPC), are suitable for bone augmentation due to their benefit for osteogenesis. Their pores allow blood-, bone- and stem cells to migrate, colonize and finally integrate into the adjacent tissue. Furthermore, the pore size affects the scaffold’s stability. Since scaffolds in maxillofacial surgery have to withstand high forces within the jaw, adequate mechanical properties are of high clinical importance. Although many studies have investigated CPC for bone augmentation, the ideal porosity for specific indications has not been defined yet. We investigated 3D printed CPC cubes with increasing pore sizes and different printing orientations regarding cell migration and mechanical properties in comparison to commercially available bone substitutes. Furthermore, by investigating clinical cases, the scaffolds’ designs were adapted to resemble the in vivo conditions as accurately as possible. Our findings suggest that the pore size of CPC scaffolds for bone augmentation in maxillofacial surgery necessarily needs to be adapted to the surgical site. Scaffolds for sites that are not exposed to high forces, such as the sinus floor, should be printed with a pore size of 750 µm to benefit from enhanced cell infiltration. In contrast, for areas exposed to high pressures, such as the lateral mandible, scaffolds should be manufactured with a pore size of 490 µm to guarantee adequate cell migration and in order to withstand the high forces during the chewing process.

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