Use of Occlusal Splint for Noninvasive Fixation of a Reference Frame in Orbital Navigation Surgery

Iwai, Toshinori; Mikami, Taro; Yasumura, Keisuke; Tohnai, Iwai; Maegawa, Jiro

doi:10.1007/s12663-015-0860-8

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…However, the soft tissue could shift and deform during the operation, which will greatly affect the precision of these two methods. Occlusal splints provide a noninvasive, highly accurate registration method that is steadily fitted to stable bony landmark-dental cups 23–25 . Due to its advantages, this method has been widely used in cranio-maxillo-facial surgical navigation.…”

Section: Discussionmentioning

confidence: 99%

Precision of a Novel Craniofacial Surgical Navigation System Based on Augmented Reality Using an Occlusal Splint as a Registration Strategy

Jiang

Zhu

Chai

et al. 2019

Sci Rep

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The authors have developed a novel augmented reality (AR)-based navigation system (NS) for craniofacial surgery. In this study, the authors aimed to measure the precision of the system and further analyze the primary influencing factors of the precision. The drilling of holes into the mandibles of ten beagle dogs was performed under the AR-based NS, and the precision was analyzed by comparing the deviation between the preoperational plan and the surgical outcome. The AR-based NS was successfully applied to quickly and precisely drill holes in the mandibles. The mean positional deviation between the preoperative design and intraoperative navigation was 1.29 ± 0.70 mm for the entry points and 2.47 ± 0.66 mm for the end points, and the angular deviation was 1.32° ± 1.17°. The precision linearly decreased with the distance from the marker. In conclusion, the precision of this system could satisfy clinical requirements, and this system may serve as a helpful tool for improving the precision in craniofacial surgery.

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Section: Discussionmentioning

confidence: 99%

Precision of a Novel Craniofacial Surgical Navigation System Based on Augmented Reality Using an Occlusal Splint as a Registration Strategy

Jiang

Zhu

Chai

et al. 2019

Sci Rep

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“…With this, the occlusal splint can provide a noninvasive, high-precision registration method, because it can be stably installed on the teeth with bony structures. 32 , 37 , 38 Therefore, we use the occlusal relationship of the teeth to make the fiducial markers tightly integrated with the skull. Cutting et al 39 studied the use of sharp bony marks for registration in AR systems, that is, through the bite plate positioning mark, the final control error is less than 1.5 mm, and the rotation error of any axial position is <3°.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the irregular shape of the teeth makes it easy to form a mosaic state with other materials. With this, the occlusal splint can provide a noninvasive, high-precision registration method, because it can be stably installed on the teeth with bony structures 32,37,38 . Therefore, we use the occlusal relationship of the teeth to make the fiducial markers tightly integrated with the skull.…”

Section: Discussionmentioning

confidence: 99%

A Novel Precise Optical Navigation System for Craniomaxillofacial Surgery Registered With an Occlusal Splint

Hou

Chai

2021

Journal of Craniofacial Surgery

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Background: An augmented reality tool allows visual tracking of real anatomical structures and superimposing virtual images, so it can be used for navigation of important structures during surgery. Objectives: The authors have developed a new occlusal splint-based optical navigation system for craniomaxillofacial surgery. In this study, the authors aim to measure the accuracy of the system and further analyze the main factors influencing precision. Methods: Ten beagle dogs were selected and a three-dimensional model was established through computed tomography scanning, dental model making, and laser scanning, and then registration was performed according to the tooth marking points. The bilateral mandibular osteotomy was performed on Beagle dogs under navigation system based on the occlusal splint. The left side was taken to compare the deviation between the preoperative plan and the surgical results, and the accuracy of distance and angle and the stability of the system were analyzed. Results: The average position deviation between the preoperative design and intraoperative navigation was: 0.01 ± 0.73 mm on the lateral height of the mandibular ramus, 0.26 ± 0.57 mm on the inner height of the mandibular ramus, and 0.20 ± 0.51 mm on the osteotomy length. The average angle deviation is 0.94° ± 1.38° on the angle between the mandibular osteotomy plane and ramus plane and 0.66° ± 0.97° on the angle of the retained mandibular angle. And most of the data showed good consistency. Conclusions: In summary, the accuracy of the system can meet clinical requirements and can be used as a useful tool to improve the accuracy of craniomaxillofacial surgery.

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“…Several studies have proposed designs of a Dynamic Reference Frame supported by a splint 20 – 31 . This position of the Dynamic Reference Frame may be less invasive than fixation on the patient’s cranium 32 . Registration outside the patient has been proposed, both with a fiducial-based 20 – 23 , 25 – 27 and automatic method 28 – 31 .…”

Section: Discussionmentioning

confidence: 99%

Registration-free workflow for electromagnetic and optical navigation in orbital and craniofacial surgery

Schreurs

Baan

Klop

et al. 2021

Sci Rep

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The accuracy of intra-operative navigation is largely dependent on the intra-operative registration procedure. Next to accuracy, important factors to consider for the registration procedure are invasiveness, time consumption, logistical demands, user-dependency, compatibility and radiation exposure. In this study, a workflow is presented that eliminates the need for a registration procedure altogether: registration-free navigation. In the workflow, the maxillary dental model is fused to the pre-operative imaging data using commercially available virtual planning software. A virtual Dynamic Reference Frame on a splint is designed on the patient’s fused maxillary dentition: during surgery, the splint containing the reference frame is positioned on the patient’s dentition. This alleviates the need for any registration procedure, since the position of the reference frame is known from the design. The accuracy of the workflow was evaluated in a cadaver set-up, and compared to bone-anchored fiducial, virtual splint and surface-based registration. The results showed that accuracy of the workflow was greatly dependent on tracking technique used: the workflow was the most accurate with electromagnetic tracking, but the least accurate with optical tracking. Although this method offers a time-efficient, non-invasive, radiation-free automatic alternative for registration, clinical implementation is hampered by the unexplained differences in accuracy between tracking techniques.

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Use of Occlusal Splint for Noninvasive Fixation of a Reference Frame in Orbital Navigation Surgery

Cited by 10 publications

References 3 publications

Precision of a Novel Craniofacial Surgical Navigation System Based on Augmented Reality Using an Occlusal Splint as a Registration Strategy

Precision of a Novel Craniofacial Surgical Navigation System Based on Augmented Reality Using an Occlusal Splint as a Registration Strategy

A Novel Precise Optical Navigation System for Craniomaxillofacial Surgery Registered With an Occlusal Splint

Registration-free workflow for electromagnetic and optical navigation in orbital and craniofacial surgery

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