A facebow-free technique for mechanical articulator remounting using computed tomography.

Area of Science:

• Dental Technology
• Biomedical Imaging
• Prosthodontics

Background:

• Traditional dental cast mounting on articulators often requires a facebow.
• Accurate transfer of the maxillomandibular relationship is crucial for dental restorations.
• Limitations exist in current methods for precise and repeatable dental cast remounting.

Purpose of the Study:

• To introduce a novel technique for remounting dental casts using computed tomography (CT) without a facebow.
• To develop a jig-based method for precise alignment and transfer of virtual dental casts to a virtual articulator.
• To enhance the accuracy and reproducibility of capturing the patient's maxillomandibular relationship.

Main Methods:

• Utilized computed tomography (CT) to reconstruct virtual dental casts of the upper and lower jaws.
• Developed a custom positioning jig and splint to preserve the spatial relationship between the midface and mandible.
• Aligned virtual dental casts to reconstructed jaw models and transferred them to a virtual articulator using anatomical landmarks.

Main Results:

• The proposed jig method ensures precise remounting of dental casts.
• The technique accurately preserves the spatial relationship between the midface and mandible.
• The method allows for quick, repeatable, and accurate transfer of the maxillomandibular relationship.

Conclusions:

• The CT-based jig technique offers a reliable alternative for remounting dental casts without a facebow.
• This method enhances the accuracy and efficiency of transferring patient-specific jaw relationships to articulators.
• The technique is valuable for digital dentistry workflows and prosthetic applications.