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KMID : 1004520230390030176
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Journal of Dental Rehabilitation and Applied Science
2023 Volume.39 No. 3 p.176 ~ p.185
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Positional deviation between CBCT-based digital facebow transfer and analog facebow transfer: case series
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Park Myung-Hyun
Son Keunbada
Ahn Hwi-Gyun
Lee Du-Hyeong
Kim So-Yeun
Lee Kyu-Bok
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Abstract
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Facebow transfer is essential for accurately mounting a dental cast onto a semi-adjustable articulator. The precision of traditional analog facebow transfer is influenced by both the accuracy of the equipment used and the skill level of the operator. Considering that substantial positional deviations can adversely affect the quality of a fabricated dental prosthesis; it is critical to assess the positional accuracy of casts mounted using analog facebow transfer. This case report evaluates the linear and angular deviations of the occlusal plane for maxillary casts mounted through both analog facebow transfer and cone-beam computed tomography-based methods. The findings indicate that analog facebow transfer produced a linear deviation ranging from 3 to 16 mm and an angular deviation of the occlusal plane between 5 to 7 degrees. This case report confirms that, across two patients, analog facebow transfer can result in varying degrees of positional deviation, thereby potentially leading to inaccuracies in the fabrication of dental prostheses. These results suggest that, in clinical practice, the use of analog facebow transfer may yield significant deviations during the process of mounting maxillary casts.
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KEYWORD
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facebow transfer, CBCT, mounting, positional deviation, occlusal plane, articulator
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