Evaluation of transverse maxillary growth on cone-beam computed tomography images

AbstractThis study aimed at quantifying the annual transverse growth of the maxilla using skeletal landmarks in three different regions on cone-beam computed tomography (CBCT) scans. CBCT scans taken before and after orthodontic treatment of 100 child and adolescent patients (50 male, 50 female) without maxillary transverse deficiencies were used to determine the transverse linear distances between the greater palatine foramina (GPFd), the lateral walls of the nasal cavity (NCd), and the infraorbital foramina (IOFd). We found that all distances increased significantly with growth in both genders (p < 0.001). The overall average annual change was 0.5 mm for GPFd, 0.3 mm for NCd, and 0.7 mm for IOFd. Males generally had greater annual changes than females for GPFd and IOFd, but not NCd. There were weak, statistically not significant (p > 0.05) correlations between patient age and the annual changes in GPFd, NCd, and IOFd. These results suggest that the positions of the greater palatine foramina, the lateral walls of the nasal cavity, and the infraorbital foramina change consistently with maxillary transverse growth. Clinicians can use the growth rates as population averages to more confidently estimate the amount of skeletal transverse deficiency or evaluate the long-term effects of maxillary expansion treatment.

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Evaluation of Soft Tissue Projection on Axial Cone Beam Computed Tomography Images After Surgically Assisted Rapid Maxillary Expansion

Meandros Medical And Dental Journal ◽

10.4274/meandros.galenos.2020.57625 ◽

2021 ◽

Vol 22 (1) ◽

pp. 70-76

Author(s):

Delal Dara Kılınç ◽

Emrah Dilaver

Keyword(s):

Computed Tomography ◽

Soft Tissue ◽

Cone Beam Computed Tomography ◽

Rapid Maxillary Expansion ◽

Cone Beam ◽

Maxillary Expansion ◽

Computed Tomography Images

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Upper airway assessment using four different maxillary expanders in cleft patients: A cone-beam computed tomography study

The Angle Orthodontist ◽

10.2319/032015-174.1 ◽

2015 ◽

Vol 86 (4) ◽

pp. 617-624 ◽

Cited By ~ 6

Author(s):

Carolina Morsani Mordente ◽

Juan Martin Palomo ◽

Martinho Campolina Rebello Horta ◽

Bernardo Quiroga Souki ◽

Dauro Douglas Oliveira ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Cone Beam ◽

Nasal Passage ◽

Maxillary Expansion ◽

Computed Tomography Images ◽

Intergroup Comparison ◽

Significant Difference

ABSTRACTObjective: To evaluate the anterior and posterior maxillary width, the nasal passage volume, the oropharyngeal minimum axial area, and volume changes in unilateral cleft lip and palate patients treated with one of the following four expanders: Hyrax, Fan-Type, inverted mini-hyrax supported on the first permanent molars (iMini-M), or inverted mini-hyrax supported on the first premolars (iMini-B).Materials and Methods: A total of 40 patients with transverse maxillary deficiency who were submitted for rapid maxillary expansion were divided in four groups according to type of expander used. Cone-beam computed tomography images were taken before and 3 months after expansion. One-way analysis of variance was used to analyze the differences among the groups, and paired t-tests were used to evaluate the changes in each group.Results: All groups showed a significant increase in the anterior maxillary width, with no intergroup differences. The iMini-B was the only group that did not show a significant increase in the posterior maxillary width. The intergroup comparison demonstrated differences among all groups except between Hyrax and iMini-M, which showed the greatest posterior expansions. The intragroup analysis showed a significant increase in the nasal passage volume in hyrax and inverted mini-hyrax on the molar groups, but the intergroup comparison revealed a significant difference only between Fan-Type and inverted mini-hyrax on the molars. None of the expanders caused significant changes in the oropharyngeal measurements.Conclusions: Only the Hyrax and inverted mini-hyrax on the molar expanders effectively increased the nasal passage volume, and none of the expanders evaluated in this study modified the oropharyngeal airway.

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Cone Beam Computed Tomography Evaluation of Maxillary Sinus Before and After Sinus Floor Elevation

Proceedings of the Latvian Academy of Sciences Section B Natural Exact and Applied Sciences ◽

10.2478/prolas-2019-0060 ◽

2019 ◽

Vol 73 (4) ◽

pp. 387-392

Author(s):

Laura Neimane ◽

Liene Zamure ◽

Vadims Klimecs ◽

Aleksandrs Grišuļonoks ◽

Andrejs Skaģers ◽

...

Keyword(s):

Computed Tomography ◽

Nasal Cavity ◽

Maxillary Sinus ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Sinus Lift ◽

Concha Bullosa ◽

Before And After ◽

Sinus Floor ◽

Mucosal Thickening

Abstract Sinus lift surgery elevation is a procedure that requires radiological maxillary sinus evaluation and procedure planning. The condition of the maxillary sinus before and after sinus lift surgery was assessed. Sixty-five sinuses of 49 patients were included in the study. Preoperative and postoperative cone beam computed tomography (CBCT) scans were performed. The sinuses were analysed radiologically for pathological changes: mucosal thickening, ostia obstruction and accessory opening. The presence of concha bullosa in nasal cavity and septa in the maxillary sinus were recorded. The sinus volume also was measured before and after surgery. Thickened mucosa was found more often in postoperative scans than in preoperative scans (63.1% and 67.7%, respectively). Concha bullosa was found in 30 preoperative scans and in 33 postoperative scans. A correlation between mucosal thickening and ostia obstruction was found. The mean sinus volume decreased after surgery and the changes were statistically significant. In conclusion, changes of the maxillarysinus and nasal cavity can be detected with CBCT. Sinus lift surgery does not excacerebate the existing conditions of the maxillary sinus; however, there is a tendency for pathological features to increase after surgery. Sinus lift surgery is a safe surgery with regard to the maxillary sinus if performed with care.

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Effect of rapid maxillary expansion on nasal cavity assessed with cone-beam computed tomography

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.25.3.039-045.oar ◽

2020 ◽

Vol 25 (3) ◽

pp. 39-45

Author(s):

Luciana Duarte Caldas ◽

Wilton M. Takeshita ◽

André Wilson Machado ◽

Marcos Alan Vieira Bittencourt

Keyword(s):

Computed Tomography ◽

Nasal Cavity ◽

Cone Beam Computed Tomography ◽

Rapid Maxillary Expansion ◽

Cone Beam ◽

Maxillary Expansion ◽

Linear Measurements ◽

Skeletal Deformity ◽

Anterior Portion ◽

Posterior Portion

ABSTRACT Introduction: Rapid maxillary expansion (RME) is assumed as a well established procedure; although, some effects on facial complex are not yet fully understood. Objective: The aim of this research was to verify, using cone-beam computed tomography, the effect on linear dimensions of the nasal cavity. Methods: Sample consisted of twenty patients aged 7 to 16 years, with skeletal deformity that justified the use of CT scans, and who required the RME as part of the orthodontic treatment planning. Scans were taken before clinical procedures were performed (T0) and after stabilizing the expander screw (T1). Dolphin Imaging v. 11.5 3D software was used to measure six areas on nasal cavity: three at the anterior portion (upper, middle, and lower) and other three at the posterior portion (also upper, middle, and lower). Data were statistically treated using Shapiro-Wilk test to verify normality. Differences between T0 and T1 were calculated using the Spearman correlation and paired Student’s t-test, with a significance level of 5%. Results: All linear measurements presented a significant increase (p< 0.05) after RME, both in the anterior and posterior regions, suggesting some parallelism on the opening pattern, especially at the lower portion (p< 0.001). Conclusions: RME was able to significantly modify the internal dimensions of the nasal cavity.

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