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The Influence of Molar Extraction in Mandible on the Bone Remodeling Process under Different Chewing Conditions

Anna Tomaszewska

Anna Tomaszewska

Institute of Biomedical Engineering, Faculty of Mechanical Engineering, Bialystok University of TechnologyBialystok,
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Tomaszewska, Anna
  
Mar 31, 2025
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Published Online: Mar 31, 2025
Page range: 148 - 152
Received: Dec 03, 2024
Accepted: Jan 12, 2025
DOI: https://doi.org/10.2478/ama-2025-0017
Keywords
© 2025 Anna Tomaszewska, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1.

Geometric models prepared for the study: a) basic anatomical model before extraction; b) anatomical model after tooth extraction
Geometric models prepared for the study: a) basic anatomical model before extraction; b) anatomical model after tooth extraction

Fig. 2.

The cross-section A-A of the molar tooth and the mandibular bone
The cross-section A-A of the molar tooth and the mandibular bone

Fig. 3.

Representation of the force vectors exerted by the main muscles acting on the mandible. The vectors are labeled (e.g. RM: Right Masseter, LT: Left Temporalis) to correspond with the muscle names listed in Table 1. The directions and magnitudes of the vectors were determined based on the values provided in Tab. 1
Representation of the force vectors exerted by the main muscles acting on the mandible. The vectors are labeled (e.g. RM: Right Masseter, LT: Left Temporalis) to correspond with the muscle names listed in Table 1. The directions and magnitudes of the vectors were determined based on the values provided in Tab. 1

Fig. 4.

Cross-section of the tooth and mandibular bone highlighting the zone: a) for cancellous bone; b) for cortical bone
Cross-section of the tooth and mandibular bone highlighting the zone: a) for cancellous bone; b) for cortical bone

Fig. 5.

Distribution of HMH stress [MPa] in cancellous bone before tooth extraction
Distribution of HMH stress [MPa] in cancellous bone before tooth extraction

Fig. 6.

Distribution of HMH stress [MPa] in cancellous bone after tooth extraction
Distribution of HMH stress [MPa] in cancellous bone after tooth extraction

Fig. 7.

Distribution of HMH stress [MPa] in cortical bone before tooth extraction
Distribution of HMH stress [MPa] in cortical bone before tooth extraction

Fig. 8.

Distribution of HMH stress [MPa] in cortical bone after tooth extraction
Distribution of HMH stress [MPa] in cortical bone after tooth extraction

Fig. 9.

Division into areas for: a) cancellous bone; b) cortical bone
Division into areas for: a) cancellous bone; b) cortical bone

Change in cortical bone density [g/cm3] in the analyzed areas for the model after tooth extraction compared to the model before tooth extraction

Region Incisiors Molars Molars right Molars left
CR1 [%] 0 102 −9 −12
CR2 [%] −12 27 −9 −2
CR3 [%] 285 28 52 2
CR4 [%] −7 49 −5 3
CR5 [%] 323 −4 127 0
CR6 [%] −72 181 0 0
CR7 [%] −10 −4 9 0
CR8 [%] 0 48 0 −17
CR9 [%] 0 3 0 0
CR10 [%] 0 8 0 0

Change in cancellous bone density in the analyzed areas [g/cm3] for the model after tooth extraction compared to the model before tooth extraction

Region Incisiors Molars Molars right Molars left
CN1 [%] 938 −72 505 27
CN2 [%] 82 −56 103 725
CN3 [%] 80 0 59 483
CN4 [%] −24 −18 28 1415
CN5 [%] 37 0 189 49
CN6 [%] 68 0 2059 0

Values exerted by the muscles(17)

Muscles description A B C
Middle temporalis [N] 5.7 64.0 63.0
Deep masseter [N] 21.2 48.9 17.1
Superficial masseter [N] 76.1 114.2 137.0
Anterior temporalis [N] 1.6 91.6 115.4
Medial pterygoid [N] 136.4 104.9 146.9
Language:
English
Publication timeframe:
4 times per year
Journal Subjects:
Engineering, Electrical Engineering, Electronics, Mechanical Engineering, Mechanics, Bioengineering and Biomedical Engineering, Biomechanics, Civil Engineering, Environmental Engineering
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