1.Cone-beam computed tomography texture analysis can help differentiate odontogenic and non-odontogenic maxillary sinusitis
Andre Luiz Ferreira COSTA ; Karolina Aparecida Castilho FARDIM ; Isabela Teixeira RIBEIRO ; Maria Aparecida Neves JARDINI ; Paulo Henrique BRAZ-SILVA ; Kaan ORHAN ; Sérgio Lúcio Pereira de Castro LOPES
Imaging Science in Dentistry 2023;53(1):43-51
Purpose:
This study aimed to assess texture analysis (TA) of cone-beam computed tomography (CBCT) images as a quantitative tool for the differential diagnosis of odontogenic and non-odontogenic maxillary sinusitis (OS and NOS, respectively).
Materials and Methods:
CBCT images of 40 patients diagnosed with OS (N=20) and NOS (N=20) were evaluated. The gray level co-occurrence (GLCM) matrix parameters, and gray level run length matrix texture (GLRLM) parameters were extracted using manually placed regions of interest on lesion images. Seven texture parameters were calculated using GLCM and 4 parameters using GLRLM. The Mann-Whitney test was used for comparisons between the groups, and the Levene test was performed to confirm the homogeneity of variance (α=5%).
Results:
The results showed statistically significant differences (P<0.05) between the OS and NOS patients regarding 3 TA parameters. NOS patients presented higher values for contrast, while OS patients presented higher values for correlation and inverse difference moment. Greater textural homogeneity was observed in the OS patients than in the NOS patients, with statistically significant differences in standard deviations between the groups for correlation, sum of squares, sum of entropy, and entropy.
Conclusion
TA enabled quantitative differentiation between OS and NOS on CBCT images by using the parameters of contrast, correlation, and inverse difference moment.
2.Aggressive unicystic ameloblastoma affecting the posterior mandible: late diagnosis during orthodontic treatment.
Sérgio Lúcio PEREIRA DE CASTRO LOPES ; Isadora Luana FLORES ; Thiago DE OLIVEIRA GAMBA ; Rivea Ines FERREIRA-SANTOS ; Mari Eli LEONELLI DE MORAES ; Aline ALVAREZ CABELLO ; Paula NASCIMENTO MOUTINHO
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2017;43(2):115-119
Maxillofacial images must be examined to find pathologies not identified during clinical examination. Unicystic ameloblastoma (UA) extending to the mandibular body and ramus was neglected on initial panoramic radiographic examination. After orthodontic therapy, a huge lesion was observed clinically and through imaging exams. After the conservative surgery, no recurrence was observed during five years of follow-up. This case emphasized the need for careful evaluation of patient images focusing on the oral diagnosis before any dental treatment planning, including orthodontic therapy.
Ameloblastoma*
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Delayed Diagnosis*
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Dentistry
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Diagnosis, Oral
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Diagnostic Imaging
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Follow-Up Studies
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Humans
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Mandible*
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Pathology
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Recurrence