Mesial Rotation of the Upper First Molar: Association with Anterior Dental Crowding in Mixed and Permanent Dentition
Abstract
1. Introduction
2. Materials and Methods
3. Results
3.1. Subjects with Mixed Dentition
3.2. Subjects with Permanent Dentition
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Number of Subjects (% in the Group) with Mixed Dentition (n = 180) | |
---|---|
Molar mesiorotation: | |
Correct position | 16 (8.89%) |
Mesiorotated molar | 164 (91.11%) |
Occlusal relationship: | |
Molar class I relationship | 52(28.89%) |
End-to-end molar class | 78 (43.33%) |
Molar class II relationship | 15 (8.33%) |
Molar class III relationship | 35 (19.44%) |
Crowding/Diastema: | |
Space excess in the dental arch | 7 (3.89%) |
No crowding | 19 (10.56%) |
Light crowding | 42 (23.33%) |
Moderate Crowding | 77 (42.78%) |
Severe crowding | 35 (19.55%) |
Number of Subjects (% in the Group) with Permanent Dentition (n = 169) | |
---|---|
Molar mesiorotation: | |
Correct position | 14 (8.28%) |
Mesiorotated molar | 155 (91.72%) |
Occlusal relationship: | |
Molar class I relationship | 83 (49.11%) |
End-to-end molar class | 50 (29.59%) |
Molar class II relationship | 26 (15.38%) |
Molar class III relationship | 10 (5.92%) |
Crowding/Diastema: | |
Space excess in the dental arch | 10 (5.92%) |
No crowding | 19 (11.24%) |
Light crowding | 48 (28.40%) |
Moderate Crowding | 63 (37.28%) |
Severe crowding | 29 (17.16%) |
Mixed Dentition (n = 180) Number of Subjects (% on Group) | Permanent Dentition (n = 169) Number of Subjects (% on Group) | |||
---|---|---|---|---|
Occlusal Class | Correct Position | Mesiopalatal Rotation | Correct Position | Mesiopalatal Rotation |
Molar class I | 11 (21.15%) | 41 (78.85%) | 6 (7.23%) | 77 (92.77%) |
Molar class II | 2 (2.56%) | 76 (97.44%) | 4 (8.0%) | 46 (92%) |
End-to-end relationship | 0 (0%) | 15 (100%) | 3 (11.54%) | 23 (88.46%) |
Molar class III | 3 (8.57%) | 32 (91.43%) | 1 (10%) | 9 (91.72%) |
Pearson chi-square | 14.98 (p = 0.002) | n.s. 1 | ||
Likelihood Ratio | 15.24 (p = 0.002) | n.s. 1 | ||
Linear-by-Linear Association | 3.85 (p = 0.05) | n.s. 1 |
Mixed Dentition (n = 180) Number of Subjects (% on Group) | Permanent Dentition (n = 169) Number of Subjects (% on Group) | |||
---|---|---|---|---|
Crowding/Diastema | Correct Position | Mesiopalatal Rotation | Correct Position | Mesiopalatal Rotation |
No crowding | 3 (15.79%) | 16 (84.21%) | 4 (21.05%) | 15 (78.95%) |
Light crowding | 5 (11.9%) | 37 (88.1%) | 6 (12.5%) | 42 (87.5%) |
Moderate crowding | 6 (7.79%) | 71 (92.21%) | 4 (6.35% | 59 (93.65%) |
Severe crowding | 2 (5.71%) | 33 (94.29%) | 0 (0%) | 29 (100%) |
Space excess in the dental arch | 0 (0%) | 7 (100%) | 0 (0%) | 10 (100%) |
Pearson chi-square | n.s. | 9.03 (p = 0.05) | ||
Likelihood Ratio | n.s. | 11.03 (p = 0.026) | ||
Linear-by-Linear Association | n.s. | 8.46 (p = 0.004) |
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Quinzi, V.; Tecco, S.; Nota, A.; Caggiati, E.; Mummolo, S.; Marzo, G. Mesial Rotation of the Upper First Molar: Association with Anterior Dental Crowding in Mixed and Permanent Dentition. Appl. Sci. 2020, 10, 5301. https://doi.org/10.3390/app10155301
Quinzi V, Tecco S, Nota A, Caggiati E, Mummolo S, Marzo G. Mesial Rotation of the Upper First Molar: Association with Anterior Dental Crowding in Mixed and Permanent Dentition. Applied Sciences. 2020; 10(15):5301. https://doi.org/10.3390/app10155301
Chicago/Turabian StyleQuinzi, Vincenzo, Simona Tecco, Alessandro Nota, Eleonora Caggiati, Stefano Mummolo, and Giuseppe Marzo. 2020. "Mesial Rotation of the Upper First Molar: Association with Anterior Dental Crowding in Mixed and Permanent Dentition" Applied Sciences 10, no. 15: 5301. https://doi.org/10.3390/app10155301
APA StyleQuinzi, V., Tecco, S., Nota, A., Caggiati, E., Mummolo, S., & Marzo, G. (2020). Mesial Rotation of the Upper First Molar: Association with Anterior Dental Crowding in Mixed and Permanent Dentition. Applied Sciences, 10(15), 5301. https://doi.org/10.3390/app10155301