Comparison reproducibility between the facebow and a new technique based on a spirit level device

Area of Science:

• Dental prosthetics
• Craniomaxillofacial surgery
• Biomechanical analysis

Background:

• Accurate mounting of maxillary casts is crucial for dental prosthetics.
• The traditional facebow technique has limitations in reproducibility.
• A novel method is needed to improve the accuracy of cast mounting.

Purpose of the Study:

• To introduce and evaluate a novel spirit level device for mounting maxillary casts.
• To compare the reproducibility of the spirit level device against the conventional facebow.
• To assess the clinical applicability of the new spirit level technique.

Main Methods:

• Maxillary casts from 10 participants were mounted using three methods: facebow, spirit level (seated), and spirit level (standing).
• Each mounting was performed by three independent evaluators.
• Reproducibility was quantified using Technical Error of Measurement (TEM) and inter-evaluator Coefficient of Variation (CV).

Main Results:

• The spirit level device demonstrated lower mean absolute TEM (2.2 mm, 2.6 mm) compared to the facebow (4.3 mm).
• Relative TEM and CV values were also lower for the spirit level device across seated and standing positions.
• The new technique showed improved consistency across evaluators.

Conclusions:

• The spirit level device offers superior reproducibility in mounting maxillary casts compared to the facebow.
• This new technique is a viable and satisfactory alternative for clinical dental practice.
• The findings support the adoption of the spirit level device for enhanced accuracy in prosthodontic procedures.