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Previous issue date: 2017-07-11 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES === The objectives of this study were to evaluate two types of rare
craniofacial and dento-skeletal anomalies: hemifacial microsomia (HFM) and
primary of failure eruption (PFE) of the permanent teeth.
A literature review addressed to the three-dimensional evaluation
methods of mandibular asymmetries in subjects with HFM, using conventional
computed tomography (CT) and cone beam (CBCT) was conducted (Paper 1).
CBCT data of 14 individuals with HFM and 35 subjects without HFM
were selected and mandibular dimensions were evaluated and compared.
Cephalometric landmarks were identified in the multiplanar images and
panoramic reconstructions, and linear and angular measurements were
performed for comparison between the right and left sides or affected and nonaffected
sides of the mandible. InVivo Dental Software (Anatomage, San Jose,
CA) was used in this evaluation. All variables showed a significant difference
between the affected and non-affected side of the mandible in the HFM group,
except the mandibular length, that presented similar dimensions on both sides.
In the comparison between HFM and control groups, the angular
measurements were significantly higher on the affected side and the mandibular
ramus length on the non-affected side of HFM individuals was higher than in the
control group. This type of growth pattern may be associated with bone
compensations in the mandible of HFM individuals (Paper 2).
In the study about rare dento-skeletal malformations, different
approaches for the orthodontic treatment in adults and children with PFE were
presented (Paper 3). Depending on the condition severity, the impact on the functional and
aesthetic aspects in affected individuals can be significant and difficult to treat. === O objetivo deste trabalho foi estudar dois tipos de anomalias craniofacias
e altera??es dento-esqueletais raras: microssomia hemifacial (MHF) e falhas de
erup??o prim?ria (FEP) dos dentes permanentes.
Foi realizada uma revis?o de literatura, que abordou os m?todos de
avalia??o tridimensional de assimetrias mandibulares em indiv?duos com MHF,
por meio de tomografia computadorizada convencional e cone beam (TCCB)
(artigo 1).
Exames de TCCB de 14 indiv?duos com MHF e de 35 sem MHF foram
selecionadas e as dimens?es mandibulares foram avaliadas e comparadas.
Pontos cefalom?tricos foram localizados nas imagens multiplanares e
reconstru??es panor?micas, sobre as quais medidas lineares e angulares
foram realizadas para compara??o entre os lados direito e esquerdo ou lados
afetado ou n?o da mand?bula. O software InVivo Dental (Anatomage, San Jose,
CA) foi utilizado para esta avalia??o. Todas as vari?ves apresentaram
diferen?a significativa entre o lado afetado e n?o afetado da mand?bula no
grupo MFH, exceto o comprimento mandibular, que apresentou dimens?es
semelhantes em ambos os lados. Na compara??o entre os grupos MHF e
controle, as medidas angulares foram significativamente maiores no lado
afetado e o comprimento do ramo mandibular do lado n?o afetado pela MHF foi
maior do que no grupo controle. Este tipo de padr?o de crescimento pode estar
associado a compensa??es ?sseas na mand?bula de indiv?duos com MHF
(artigo 2). No estudo que abordou altera??es dento-esqueletais raras, foram
apresentadas diferentes abordagens para tratamento ortod?ntico das FEP em
adultos e crian?as (artigo 3).
Deformidades faciais e dento-esqueletais raras podem promover
altera??es anat?micas complexas em diferentes estruturas craniofaciais.
Dependendo da severidade da condi??o, o impacto nos aspectos funcionais e
est?ticos dos indiv?duos acometidos pode ser significativo e de dif?cil
tratamento.
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