scholarly journals THE USE OF CAD/CAM TECHNOLOGY IN SURGICAL TREATMENT OF CONDYLAR HEAD FRACTURE

2019 ◽  
Vol 112 (4) ◽  
pp. 23-31
Author(s):  
Tetiana Pavlychuk ◽  
Denis Chernogorskyi ◽  
Yurii Chepurnyi ◽  
Andrii Kopchak
Keyword(s):  
Surgical Treatment ◽  
Maxillofacial Surgery ◽  
Three Dimensional ◽  
Mouth Opening ◽  
Surrounding Tissue ◽  
Patient Specific ◽  
Number Of Patients ◽  
Two Component ◽  
Cad Cam ◽  
Condylar Head

Management of the condylar head fractures is still one of the most controversial issues of the maxillofacial surgery. The aim of the present study was to increase the accuracy and quality of the surgical treatment of condylar head fracture with the use of navigation surgical guide and patient specific reinforcement two-component plate and individualized fixator with the use of CAD/CAM technology. In study was included 8  patient with 10 condylar head fractured. In 5 cases was used navigation guides, in 4 cases (the biomechanical unfavorable)  was used the patient specific two-component plate and only in one case we used  individualized patient specific plate. A CT scan was done immediately after the operation. The reduction of the fragments and the location of the screws, plate and fixator were checked on the same view in the preoperative and postoperative pictures on the computer. The relation between the screw and the cortical bones was clearly shown on CT, and the sizes of the bicortical screws were suitable with no injury to the articular cartilage or surrounding tissue. The three-dimensional objects showed that the screw was in the designated position and the condyle had been replaced and fixed in the normal position. The height of the ramus on the fractured side was restored immediately postoperatively. The malocclusion was corrected and the passive mouth opening of each patient was never less than 3 cm. One  patients had transient paralysis of the temporal branch of the facial nerve postoperatively, which gradually recovered within a 2 month. Postoperative clinical examination showed good occlusion and mouth opening of at least 3 cm in all patients after 3 months without pain. All patients regained normal mandibular movements and had short and invisible scars at 6 months’ follow-up. Given the small number of patients, this issue needs further study in randomized prospective studies involving more patients and evaluating long-term postoperative outcomes

Comparative Study between IMF and Pure Conservation in Management of Condylar Head Fracture in Children

2018 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Closed Reduction ◽  
Surgical Intervention ◽  
Maxillofacial Surgery ◽  
Mouth Opening ◽  
Clinical Results ◽  
Number Of Patients ◽  
Condylar Head ◽  
Group 2 ◽  
Group 1

Background: The purpose of the present study was to compare IMF and pure conservation in management of condylar head fracture in children treated at the Department of Maxillofacial Surgery, Faculty of Medicine, Assiut University, Egypt, between 2011G - 2016G. Methods: Twenty four patients with condylar head fractures were included in this study, 14 males and 10 females ranging in ages from 5 – 15 years. They were divided into two equal groups. In group 1, twelve patients were treated by closed reduction for 2-3 weeks followed by physiotherapy, while group 2 patients were managed by pure conservation only for the same period. Outcome results on clinical and radiological parameters were evaluated during the follow up period. Results: In group 1, the maximum mouth opening after 2 months was ranged from 28-36 mm (average 32mm),while signs of development of ankylosis were reported in 3 patients. In group 2, the maximum interincisal opening was ranged from 28-37 mm (average 32.5mm) with absence of ankylosis. Pain in TMJ was noted in 3 cases of bilateral condylar head fractures of this group, but subsided gradually on the follow up. Conclusions: This study concluded that treatment of patients by closed reduction give satisfactory clinical results, though the condyle is not anatomically normal in radiographs. Whereas management of patients by pure conservation only without any surgical intervention showed excellent results clinically as well as radiographically. Perhaps a study conducted on larger number of patients with longer post operative follow up will throw more light on this subject.

An Enhanced Development of 3D Intra-Oral Scanner Using Fringe-Projection Technique for Dentistry

2016 ◽  
Author(s):  
Hong-Seok Park ◽  
Chintal Shah ◽  
Rima Shah
Keyword(s):  
Oral Cavity ◽  
Light Source ◽  
Phase Distribution ◽  
Three Dimensional ◽  
Mouth Opening ◽  
Vital Role ◽  
Fringe Projection ◽  
Mapping Algorithm ◽  
Novel Approach ◽  
Cad Cam

3D shape recognization technique is rapidly advancing from last decade in the fields of manufacturing, computer science, entertainment and medical technology. Due to the restriction of size and area of cavity, it’s challenging to develop such non-contact optical technologies for scanning. 3D digitization technology plays a vital role in the field of dentistry benefiting dentists and patients by eliminating long time procedures for making the prosthesis/abutments and results into ultimate comfort. In this paper, we have recounted a design of a prototype for a three-dimensional intra-oral scanner using the principle of fringe projection and active triangulation method. LED as a light source passed through the liquid crystal on silicon (LCoS) which radiates the light into three colors and strikes onto the collimating lens assembly and then passed through the optical deflectors. Once the light strikes the object through scanning window it is guided back through the flat reflectors and the fringe pattern on the object is stored into the gray encoding plate. With the help of camera all these images are stored. After the acquisition of images, firstly it will calculate the phase distribution using four-step phase shifting algorithm and unwrap the wrap phase which helps us in getting accurate images. Later, we get display of scanned oral cavity onto the computer screen. Phase-height mapping algorithm has been realized for the reconstruction of the 3D real time reconstruction of the scanned oral cavity which helps us in fast scanning with accurate data. A novel approach of LED as a light source and LCoS display for scattering light fragments into three different colors helps us to scan more effectively for registration of dental surfaces from the patient’s mouth more accurately. Apart from that, its sleek design helps to scan with less pain to the patient’s having low mouth opening. Experiment was performed on the prototype of denture and using this proposed method we have achieved the accuracy of 25μm and it took around 180 sec for the full arc scan of the lower oral cavity. The result of scanned data was checked using the CAD/CAM software for dentistry and compared with the prototype data of denture. Further this image can be used for making prosthesis/abutment directly into production using 3D printing machine or the milling machine. Thus, an abutment or prosthesis obtained with this method is of high quality and eliminates conventional long procedures which helps in reducing pain of patient’s and helps dentists to attain more patients in less time.

Ankylosis and pseudoankylosis of the temporomandibular joint in 10 dogs (1993–2015)

2016 ◽  
Vol 29 (05) ◽  
pp. 409-415 ◽  
Author(s):  
Peter Strøm ◽  
Boaz Arzi ◽  
Derek Cissell ◽  
Frank Verstraete
Keyword(s):  
Surgical Treatment ◽  
Range Of Motion ◽  
Temporomandibular Joint ◽  
Three Dimensional ◽  
Case Series ◽  
Patient Specific ◽  
Three Dimensional Printing ◽  
Temporomandibular Joint Ankylosis ◽  
Dimensional Printing ◽  
Joint Ankylosis

SummaryObjective: To describe the clinical features and results of treatment of true ankylosis and pseudoankylosis of the temporomandibular joint in dogs.Methods: This study was a retrospective case series. Ten client-owned dogs that were presented for inability to open the mouth or a severely decreased range of motion of the temporomandibular joint were included. Information on the surgical procedures performed and the perioperative complications were documented. Three-dimensional printing of the skull was performed in four dogs.Results: Two dogs were diagnosed with temporomandibular joint ankylosis and seven dogs with pseudoankylosis. One dog had evidence of combined temporomandibular joint ankylosis and pseudoankylosis. Of the seven dogs with pseudoankylosis, six had an osseous fusion involving the zygomatic arch and mandible. Surgical treatment was performed in nine dogs and a revision surgery was needed in one dog. Follow-up ranged from five months to eight years (mean: 48.6 months). Eight out of nine dogs that were treated surgically regained the ability to open their mouth, but six dogs never regained a fully normal temporomandibular joint range of motion.Clinical significance: Temporomandibular joint ankylosis and pseudoankylosis are uncommon in the dog. Surgical treatment for temporomandibular joint ankylosis or pseudoankylosis in dogs is a successful option and carries a prognosis dependent on patient-specific abnormalities. Computed tomography complemented with three- dimensional printing is valuable for understanding the extent of abnormalities and for preoperative planning.Supplementary material for this paper is available online at http://dx.doi.org/10.3415/VCOT-15-11-0189.

Robot Guided Sheaths (RoGS) for Percutaneous Access to the Pediatric Kidney: Patient-Specific Design and Preliminary Results

2013 ◽  
Author(s):  
Tania K. Morimoto ◽  
Michael H. Hsieh ◽  
Allison M. Okamura
Keyword(s):  
Three Dimensional ◽  
The Body ◽  
Surrounding Tissue ◽  
Patient Specific ◽  
Three Dimensional Model ◽  
Specific Design ◽  
Surgical Access ◽  
Minimally Invasive Surgical ◽  
Area Of Interest ◽  
Ct Data

Robot-guided sheaths consisting of pre-curved tubes and steerable needles are proposed to provide surgical access to locations deep within the body. In comparison to current minimally invasive surgical robotic instruments, these sheaths are thinner, can move along more highly curved paths, and are potentially less expensive. This paper presents the patient-specific design of the pre-curved tube portion of a robot-guided sheath for access to a kidney stone; such a device could be used for delivery of an endoscope to fragment and remove the stone in a pediatric patient. First, feasible two-dimensional paths were determined considering workspace limitations, including avoidance of the ribs and lung, and minimizing collateral damage to surrounding tissue by leveraging the curvatures of the sheaths. Second, building on prior work in concentric-tube robot mechanics, the mechanical interaction of a two-element sheath was modeled and the resulting kinematics was demonstrated to achieve a feasible path in simulation. In addition, as a first step toward three-dimensional planning, patient-specific CT data was used to reconstruct a three-dimensional model of the area of interest.

scholarly journals Annual Clinical Audit of Indoor, Dhaka Dental College and Hospital (January 2004 - December 2005)

2015 ◽  
Vol 5 (2) ◽  
pp. 37-39
Author(s):  
Nasir Uddin ◽  
MU Ahmed ◽  
IA Haider ◽  
AKM Sobhan Morol
Keyword(s):  
Surgical Treatment ◽  
Clinical Audit ◽  
Elective Surgery ◽  
Maxillofacial Surgery ◽  
Oral And Maxillofacial Surgery ◽  
Dental Research ◽  
Number Of Patients ◽  
Research And Education

Clinical audit of indoor, Dept. of Oral and Maxillofacial Surgery, Dhaka Dental College and Hospital was performed for two years, January 2004 to December 2005. Data included all the indoor patients who were admitted for elective surgery. Day cases were excluded from the study. The audit was performed to assess the nature of pathology and number of patients admitted for surgical treatment. Bangladesh Journal of Dental Research and Education Vol.5(2) 2015: 37-39

scholarly journals Application of CAD/CAM technology for surgical treatment of condylar head fractures: A preliminary study

2020 ◽  
Vol 10 (4) ◽  
pp. 608-614
Author(s):  
Tetiana Pavlychuk ◽  
Denis Chernogorskyi ◽  
Yurii Chepurnyi ◽  
Andreas Neff ◽  
Andrii Kopchak
Keyword(s):  
Surgical Treatment ◽  
Cad Cam ◽  
Condylar Head ◽  
Preliminary Study

Surgical Treatment of Cherubism with the Use of Three-Dimensional Virtual Planning and CAD-CAM Resection Guides

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Sanna Järvinen ◽  
Juho Suojanen ◽  
Anni Suomalainen ◽  
Patricia Stoor
Keyword(s):  
Surgical Treatment ◽  
Three Dimensional ◽  
Virtual Planning ◽  
Cad Cam ◽  
Cam Resection

scholarly journals Ankylosis of the temporomandibular joint—impression free CAD/CAM based joint replacement using patient-specific implants

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
D G E Thiem ◽  
B Al-Nawas ◽  
P W Kämmerer
Keyword(s):  
Temporomandibular Joint ◽  
Computer Aided Design ◽  
Mouth Opening ◽  
Patient Specific ◽  
Patient Specific Implants ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printed ◽  
Aided Design

Abstract In recent years, alloplastic temporomandibular joint (TMJ) replacement has become a permissible procedure for the reconstruction of severely destroyed TMJs. The use of computer-aided design/computer-aided manufacturing (CAD/CAM) has extended the range of applications to complex anatomical situations. The aim of the treatment is to improve the usually restricted mouth opening and thus oral hygiene and nutrition, which leads to a regular improvement in the general quality of life. The following case report describes the bilateral replacement of ankylotically destroyed TMJs using patient-specific endoprostheses with simultaneous displacement of the maxilla. Innovative in the case described is the impression-free CAD/CAM planning, whereby the upper and lower prostheses were produced on the basis of 3D printed patient models.

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