Craniomaxillofacial deformities/cosmetic surgerySplint Sterilization—A Potential Registration Hazard in Computer-Assisted Surgery
Section snippets
Materials and Methods
To investigate deformation caused by hydrogen peroxide–based plasma sterilization, a CT scan of the splint was acquired before and after 5 low-temperature sterilization cycles. Quantitative evaluation was based on point-to-point registration and subsequent surface distance measurement of registered scans before and after sterilization.
Results
Calculating the point-based registration of fiducial markers on CT scans before and after sterilization resulted in a mean fiducial distance (fiducial registration error) of 0.74 mm; maximal fiducial distance was 0.81 mm. The mean distance of the 6 target points, the TRE, in the mouthpiece was 0.15 mm; maximal distance was 0.26 mm.
Surfaces generated as described earlier resulted in 422,580 triangles before sterilization and 378,638 triangles after sterilization. The 2 directed Hausdorff
Discussion
Medical devices that have contact with sterile body tissues or fluids are considered critical items. These items, such as a splint used in a sterile operation field, must be sterile when used because any microbial contamination can result in infection. If these items are resistant to heat, the recommended sterilization process is steam sterilization because it has the largest margin of safety. However, reprocessing heat- and moisture-sensitive items such as splints requires a low-temperature
Acknowledgment
This publication was supported by the Austrian Research Promotion Agency FFG (grant 818041B1), proposed and managed by Dr Schicho. Dr Weber and Dr Figl were partly supported by FWF project P19931. A preliminary version of this study was part of a poster presentation by Christoph Weber et al at the SPIE Medical Imaging Conference, San Diego, 2009.
References (17)
- et al.
Locking acrylic resin dental stent for image-guided surgery
J Prosthet Dent
(2000) - et al.
Image-to-patient registration techniques in head surgery
Int J Oral Maxillofac Surg
(2006) - et al.
Seven years of clinical experience with teleconsultation in craniomaxillofacial surgery
J Oral Maxillofac Surg
(2005) - et al.
Point-to-point computer-assisted navigation for precise transfer of planned zygoma osteotomies from the stereolithographic model into reality
J Oral Maxillofac Surg
(2006) - et al.
Basic research and 12 years of clinical experience in computer-assisted navigation technology: A review
Int J Oral Maxillofac Surg
(2005) - et al.
Comparison of laser surface scanning and fiducial marker-based registration in frameless stereotaxyTechnical note
J Neurosurg
(2007) - et al.
Accuracy of treatment planning based on stereolithography in computer assisted surgery
Med Phys
(2006) - et al.
Sterilization by vapour condensation
Pharm Technol Eur
(1996)
Cited by (5)
Soft Tissue Changes in Patients Undergoing Intraoral Quadrangular Le Fort II Osteotomy Versus Conventional Le Fort I Osteotomy
2018, Journal of Oral and Maxillofacial SurgeryCitation Excerpt :However, 3D CT- or CBCT-based analysis represents a reliable option for soft and underlying hard tissue analysis, allowing the evaluation of changes between surfaces or selected landmarks.26 The Hausdorff distance has been used frequently to evaluate changes between 2 registered surfaces and requires a precise definition of a region of interest.24,27 The typical anatomy of the IR with its edge into the orbit limits the method in this particular region.
Use of Hausdorff Distance and Computer Modelling to Evaluate Virtual Surgical Plans with Three-Dimensional Printed Guides against Freehand Techniques for Navicular Bone Repair in Equine Orthopaedics
2021, Veterinary and Comparative Orthopaedics and TraumatologyInvestigational clinical trial of a prototype optoelectronic computer-aided navigation device for dental implant surgery
2018, International Journal of Oral and Maxillofacial Implants