DSpace Coleção:https://repositorio.ufba.br/handle/ri/99382024-03-27T12:15:59Z2024-03-27T12:15:59ZRelação entre os espaços articulares e os deslocamentos do disco da atm: avaliação por ressonância magnéticaMariz, Ana Carolina Ramoshttps://repositorio.ufba.br/handle/ri/370062023-05-20T05:04:16Z2019-07-10T00:00:00ZTítulo: Relação entre os espaços articulares e os deslocamentos do disco da atm: avaliação por ressonância magnética
Autor(es): Mariz, Ana Carolina Ramos
Primeiro Orientador: Campos, Paulo Sergio Flores
Abstract: This study aimed to evaluate the relationship between amplitude of joint spaces of
the temporomandibular (TMJ) and different types of disc displacements, by means of
MRI exams. Included in the study were MRI exams of 305 patients (610 joints) with
ages ranging between 18-79 years (mean age 37.59 ± 13.85 years). Joint spaces
were measured in paracoronal (medial space, MS; central space, CS, and lateral
space, LS) and parasagittal (anterior space AS; superior space, SS, and posterior
space, PS) planes. The collected data were tabulated and Chi-Square and Student t
and Mann-Whitney tests were applied (p<0.05). Of joints, 348 (57%) presented
articular disc displacements. Partial anterolateral displacement was the most
common (27.9%) occurrence. Higher amplitude for MS and LS was associated with
medial (p=0.004) and lateral (p=0.001) articular disc displacements, respectively.
Lower amplitude for the CS was associated with posterior (p=0.001), anterior
(p=0.003), rotational anteromedial (p=0.040) and anterolateral (p=0.002)
displacements of the articular disc. Lower amplitude for the SS was associated with
posterior (p=0.001), anterior (p=0.001), rotational anteromedial (p=0.001) and
anterolateral (p=0.002) displacements of the articular disc. Lower amplitude for the
PS was associated with anterior in addition to rotational anteromedial and
anterolateral displacements (p=0.014) of articular discs. There was no association
between higher amplitude PS and posterior displacement (p=0.234) of the articular
disc. Our results revealed that disc displacements are significantly associated with
changes in condylar position in the mandibular fossa, both in the parasagittal and
paracoronal planes, and this information is essencial when evaluating images that do
not show the articular disc.
Editora / Evento / Instituição: UNIVERSIDADE FEDERAL DA BAHIA
Tipo: Tese2019-07-10T00:00:00ZAVALIAÇÃO DO OSSO TRABECULAR E CORTICAL DA MANDÍBULA DE PACIENTES ONCOLÓGICOS EM USO DE MEDICAMENTOS ANTIRREABSORTIVOSNÉRI, JÚLIA DOS SANTOS VIANNAhttps://repositorio.ufba.br/handle/ri/369442023-04-29T05:03:45Z2022-06-10T00:00:00ZTítulo: AVALIAÇÃO DO OSSO TRABECULAR E CORTICAL DA MANDÍBULA DE PACIENTES ONCOLÓGICOS EM USO DE MEDICAMENTOS ANTIRREABSORTIVOS
Autor(es): NÉRI, JÚLIA DOS SANTOS VIANNA
Primeiro Orientador: RAMALHO, LUCIANA MARIA PEDREIRA
Abstract: Abstract:
Purpose: To evaluate the changes and complexity of bone trabeculae of the jaw in individuals
with cancer who were or were not using antiresorptive drugs through panoramic morphometric
indices and fractal dimensions (FDs).
Methods: This was a retrospective study that analyzed clinical records and panoramic
radiographs of individuals with cancer. The risk group (RG) consists of 22 individuals using
zoledronic acid (ZA) or denosumab for a minimum period of 12 months. The control group
(CG) consisted of 26 individuals without a history of the use of any antiresorptive drugs. Linear
measurements were performed to obtain the panoramic radiomorphometric indices and the FD
in four different regions of interest (ROIs).
Results: In the RG, 72.7% of the patients were using ZA, while 27.3% were using denosumab.
Death was confirmed in 36.3% of RG patients, all due to cancer (p = 0.004). In the FD analysis,
the ROIs of the mandibular angle (p = 0.000) and premolar region (p = 0.005) of the RG showed
significant changes in bone complexity when compared to the CG. In the analysis of panoramic
radiomorphometric indices, the mental index showed a significant increase in linear
measurements of the RG when compared to the CG (p = 0.008).
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Conclusions: The FD analysis of the mandibular angle and premolar angle regions of the RG
showed greater bone complexity when compared to patients in the CG. In association with the
radiomorphometric analysis of the mental index, we suggest that these locations are possible
predictors of incipient changes in the mandibular bone trabeculate in cancer patients using
antiresorptive drugs.
Editora / Evento / Instituição: UNIVERSIDADE FEDERAL DA BAHIA
Tipo: Tese2022-06-10T00:00:00ZSegmentação automática da placa dentária com base em aprendizado profundoAndrade, Katia Montanha dehttps://repositorio.ufba.br/handle/ri/368012023-04-08T05:03:38Z2022-05-04T00:00:00ZTítulo: Segmentação automática da placa dentária com base em aprendizado profundo
Autor(es): Andrade, Katia Montanha de
Primeiro Orientador: Cury, Patrícia Ramos
Abstract: Dental plaque biofilm is the main etiologic factor for dental caries and periodontal
diseases. However, its visualization is difficult, and the use of disclosing agents is a
laborious and unpleasant process. Therefore, plaque identification through an
automatic process is important. The present research aimed to apply a Convolution
Neural Network (CNN) model to segment dental plaque in intraoral digital
photographs without the use of disclosing agents. The dataset used to evaluate the
proposed system included 480 intraoral photos including lateral and frontal views of
permanent and deciduous dentition, contemplating the presence and absence of
orthodontic appliances. The photographs were divided into three subsets: 360
images were used for training; 60 photos were used for validation; and 60 photos
were used for testing. All images have been labeled by a specialist dentist with over
30 years of experience. The U-Net architecture was used for image segmentation.
Metrics of accuracy, sensitivity, specificity and F1 score were used to evaluate the
performance of the model in each dental unit. The trained model obtained 91.8%
accuracy, 67.2% sensitivity, 94.4% specificity and 60.6% F1 score. These metrics
were chosen for their easy interpretability (accuracy), their use in health areas
(sensitivity and specificity) and for weighting unbalanced classes (F1 score). A
higher plaque fraction was observed in the lateral view images, as well as in the
images with orthodontic appliances. These images also exhibited higher F1 scores
(61.7% and 61.5%, respectively) and specificity (94.5% and 95.6%, respectively).
In conclusion, a deep learning method for segmenting dental biofilm in permanent
and deciduous dentitions is feasible and could be a visual aid tool to improve oral
hygiene and patient control of dental plaque.
Editora / Evento / Instituição: UNIVERSIDADE FEDERAL DA BAHIA
Tipo: Tese2022-05-04T00:00:00ZAspectos craniofaciais de pessoas com doença falciforme: uma avaliação radiomorfométrica tridimensionalBarbosa, Inêssa da Silvahttps://repositorio.ufba.br/handle/ri/367922023-04-01T05:03:40Z2019-07-15T00:00:00ZTítulo: Aspectos craniofaciais de pessoas com doença falciforme: uma avaliação radiomorfométrica tridimensional
Autor(es): Barbosa, Inêssa da Silva
Primeiro Orientador: Sarmento, Viviane Almeida
Abstract: The objective of this research was to perform a three-dimensional assessment of craniofacial
features on subjects with sickle cell disease. On this behalf, 70 TC face scans of individuals
with diagnosed SCD (test group), attending Dental Sevice at Edgard Santos University
Hospital (UFBA, Brazil). Those scans were paired up with clinically normal patients (control
group) regarding age and sex, on a 1:1 proportion. All images were assessed using Dolphin
Imaging® software version 11.5 Premium (Dolphin Imaging & Management Solutions,
Chatsworth, California, EUA) and we performed mandibular and condylar, linear and
volumetric, measurements on the 3D module; condyle qualitative assessment on multiplanar
reconstructions; evaluation of the skeletal pattern, through linear and angular values, on
cephalometric reformations; besides upper airways volume, area and linear measurements.
Results showed a very strong intra-examiner agreement (intraclass correlation coefficient of
0,998; p<0,0001) and statistically significant differences for condyle heights (p=0,02), Go-Gn
and Cou-Go (p= 0,008 and p< 0,0001, respectively), with differences also for Cop-Gn (p=
0,008) for men while no statisticaly significant differences were found for women. On
cephalometric analysis, both SN-GoGn (p= 0,02) and Co-A (p= 0,0011) values were increased
whilst the latter kept statistically significant in women (p= 0,001) when evaluation was made
according to the patient’s gender. Evaluation of the upper airways showed significant smaller
measurements for volume and area (p= 0,007 and p= 0,02 respectively) on test group. One can
conclude that these results indicate a tendency of a lower mandibular and condylar growth,
especially in men affected with SCD, which, combined with cephalometric finds cope with a
vertical growth resultant associated with maxillary protrusion, representing a hyperdivergent
Class II skeletal pattern. Upper airways are diminished on SCD subjects, which is in accordance
with the presented skeletal pattern.
Editora / Evento / Instituição: UNIVERSIDADE FEDERAL DA BAHIA
Tipo: Tese2019-07-15T00:00:00Z