Computer-Assisted Surgery in the Edentulous Jaw Based on 3 Fixed Intraoral Reference Points

Widmann, Gerlig; Keiler, Martin; Zangerl, Antoniette; Stoffner, Rudolf; Longato, Stefano; Bale, Reto; Puelacher, Wolfgang

doi:10.1016/j.joms.2009.10.008

Cited by 17 publications

(17 citation statements)

References 32 publications

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“…The average accuracy of the templatebased registration is between 1 to 2 mm. This device can be placed on the occlusal surface of patients, or be fixed to three intra-oral reference points (Widmann et al, 2010) in completely edentulous patients. However, this method has its disadvantage.…”

Section: Introductionmentioning

confidence: 99%

Validation of anatomical landmarks-based registration for image-guided surgery: An in-vitro study

Sun

Luebbers

Agbaje

et al. 2013

Journal of Cranio-Maxillofacial Surgery

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INTRODUCTION:Perioperative navigation is a recent addition to orthognathic surgery. This study aimed to evaluate the accuracy of anatomical landmarks-based registration. MATERIALS AND METHODS: Eighty-five holes (1.2 mm diameter) were drilled in the surface of a plastic skull model, which was then scanned using a SkyView cone beam computed tomography scanner. DICOM files were imported into BrainLab ENT 3.0.0 to make a surgical plan. Six anatomical points were selected for registration: the infraorbital foramena, the anterior nasal spine, the crown tips of the upper canines, and the mesial contact point of the upper incisors. Each registration was performed five times by two separate observers (10 times total). RESULTS: The mean target registration error (TRE) in the anterior maxillary/zygomatic region was 0.93 ± 0.31 mm (p < 0.001 compared with other anatomical regions). The only statistically significant inter-observer difference of mean TRE was at the zygomatic arch, but was not clinically relevant. CONCLUSION: With six anatomical landmarks used, the mean TRE was clinically acceptable in the maxillary/zygomatic region. This registration technique may be used to access occlusal changes during bimaxillary surgery, but should be used with caution in other anatomical regions of the skull because of the large TRE observed. Perioperative navigation is a recent addition to orthognathic surgery. This study aimed to evaluate the accuracy of anatomical landmark-based registration. Materials and methods: Eighty-five holes (1.2 mm diameter) were drilled in the surface of a plastic skull model, which was then scanned using a SkyView cone beam computed tomography scanner. DICOM files were imported into BrainLab ENT 3.0.0 to make a surgical plan. Six anatomical points were selected for registration: the infraorbital foramena, the anterior nasal spine, the crown tips of the upper canines, and the mesial contact point of the upper incisors. Each registration was performed five times by two separate observers (10 times total). Results: The mean target registration error (TRE) in the anterior maxillary/zygomatic region was 0.93 ± 0.31 mm (p < 0.001 compared with other anatomical regions). The only statistically significant interobserver difference of mean TRE was at the zygomatic arch, but was not clinically relevant. Conclusion: With six anatomical landmarks used, the mean TRE was clinically acceptable in the maxillary/zygomatic region. This registration technique may be used to access occlusal changes during bimaxillary surgery, but should be used with caution in other anatomical regions of the skull because of the large TRE observed.

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Section: Introductionmentioning

confidence: 99%

Validation of anatomical landmarks-based registration for image-guided surgery: An in-vitro study

Sun

Luebbers

Agbaje

et al. 2013

Journal of Cranio-Maxillofacial Surgery

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“…It is difficult to compare the outcomes of this research with those of previous ones that used mini-implants as a fixed reference aid in the retention and stabilization of scanning and surgical templates because two of the three studies found in the literature were case reports (12,13) and the other was a study that assessed another method using guided surgery without a stereolithographic surgical guide (14). In this latter research, the technique used is a kind of navigation system and the angular average was 2.8 degrees ± 2.2 degrees to 5.2 degrees ahead of average obtained in this research in the test group.…”

Section: Discussionmentioning

confidence: 99%

“…Others (12)(13)(14)(15) have used a computer-aided three-dimensional planning protocol in combination with previously placed mini-implants and computer-aided design/computer-assisted manufacture (CAD/CAM) technology to restore completely edentulous patients. Mini-implants were used to establish a setup for computerized tomographic imaging and a surgical template.…”

Section: Introductionmentioning

confidence: 99%

Linear and Angular Deviations of Implants Placed in Experimental Casts with Stereolithographic Drill Guides Fixed by O'ring Ortho Implant Devices

et al. 2013

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The aim of this study was to evaluate whether the introduction of a device, resulting from the combination of an o'ring attachment with an orthodontic implant (o'ring ortho implant, O'ROI), to affix the surgical template of CAD/CAM-guided implant surgery contribute to minimizing the deviations in the position and inclination of implants at the time of their placement. Ten models simulating bone tissue were fabricated and randomly divided into 2 groups: 5 with the scanning and surgical template of the usual technique, representing the Control Group (C), and 5 with scanning and surgical templates fixed by o'ring ortho implants (O'ROI), representing the Test Group (T). Forty implants measuring 4x11 mm were placed in the groups, using the respective templates. The results were evaluated by the fusion of CT images of the planned and placed implants. The locations and axes were compared. There were no statistically significant differences for the angular (Tukey's test F = 1.06 and p = 0. 3124) and linear (ANOVA F = 2.54 and p = 0.11) deviations. However, the angular values of Group T showed a lower standard deviation in comparison with those of Group C. The use of o'ring ortho implants (O'ROI) is able to minimize the angular and linear deviation of implants at the time of their placement.

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“…CBCT had comparable overall TREs to MSCT, with mean TREs of 1. 38 Abbreviations: CBCT, cone-beam computed tomography; MSCT, multislice spiral computed tomography; NS, not significant.…”

Section: Discussionmentioning

confidence: 99%

“…16,36,37 In edentulous patients, invasive template fixation using 3 fixed oral reference points may be recommended. 38 As an alternative to paired-point registration, modality-and surface-based registrations may be used. 10,17 The modality-based registration in MSCT allowed for mean TREs of 0.50 to 1.57 mm.…”

Section: Widmann Et Al Accuracy Of Craniofacial Navigation J Oral Mmentioning

confidence: 99%

Do Image Modality and Registration Method Influence the Accuracy of Craniofacial Navigation?

Widmann

Zangerl

Schullian

et al. 2012

Journal of Oral and Maxillofacial Surgery

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Computer-Assisted Surgery in the Edentulous Jaw Based on 3 Fixed Intraoral Reference Points

Cited by 17 publications

References 32 publications

Validation of anatomical landmarks-based registration for image-guided surgery: An in-vitro study

Validation of anatomical landmarks-based registration for image-guided surgery: An in-vitro study

Linear and Angular Deviations of Implants Placed in Experimental Casts with Stereolithographic Drill Guides Fixed by O'ring Ortho Implant Devices

Do Image Modality and Registration Method Influence the Accuracy of Craniofacial Navigation?

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