molares inferiores - caique a. siqueira - anatomia dental
TRANSCRIPT
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Molares Inferiores
Anatomia Dental Prof. Caíque Araujo Siqueira
anatomiadental.com.br
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Molares Inferiores - Notação
• 36 e 46; • 37 e 47; • 38 e 48.
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Molares Inferiores
• Coroa cuboidal; • Maior comprimento mésio-distal de sua
coroa;
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Molares Inferiores
• Penta ou tetracuspidado; • 1º MI – normalmente penta, mas pode ser
tetra; • 2º MI – normalmente tetra, e as vezes penta.
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Molares Inferiores
• Volume: 1º MI > 2º MI
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Caíque Araujo Siqueira
1 Face Vestibular
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Formato - Trapezoidal
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Bossa - Vestibular
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Face Convexa nos Dois Sentidos
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Alargada no sentido MD
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Bastante Inclinada para Lingual
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Sulcos 1º MI
Sulco mésio-vestibular e sulco disto-vestibular.
CMVCVMEDCDV
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Sulcos 1º MI
CMVCDV
Sulco vestibular.
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Bordas 1º MI
Borda vestíbulo-oclusal: 03 segmentos em formato de “V” co r r e sponden te s a s c ú sp i de s CDV, CVMED e CMV. (CVMED>CMV>CDV); Borda vestíbulo-cervical: Dois segmentos côncavos voltados para raiz, separados por uma ponta de esmalte.
CMVCVMEDCDV
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Bordas 2º MI
CMVCDV
Borda vestíbulo-oclusal: 02 segmentos em formato de “V” correspondentes as cúspides CDV e CMV; Borda vestíbulo-cervical: Dois segmentos côncavos voltados para raiz, separados por uma ponta de esmalte.
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Caíque Araujo Siqueira
2 Face Lingual
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Formato Trapezoidal
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Bossa no 1/3 médio
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Convexa nos dois sentidos
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Alargada no sentido MD
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Sulco Lingual
CDLCML CML CDL
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Bordas
Borda línguo-oclusal: 02 segmentos em formato de “V” correspondentes as cúspides CDL e CML. (CML > CDL) Borda línguo-cervical: Dois segmentos côncavos voltados para raiz, separados por uma ponta de esmalte.
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Caíque Araujo Siqueira
3 Faces Proximais (Mesial e Distal)
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Formato Trapezoidal
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Bossa no 1/3 oclusal
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Distal menor, mais arredondada e mais convergente para o colo
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BordasBorda vestibular: convexa para vestibular; Borda lingual: convexa para lingual; Borda cervical: côncavo para raiz;
Borda Oclusal: Em forma de “V”, com o ápice truncado pela crista marginal.
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Caíque Araujo Siqueira
4.1 Face Oclusal1º MOLAR INFERIOR - PENTACUSPIDADO
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Formato trapezoidal
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Cúspides e seus volumes
CMV
CMLCDL
CDV
CVmedCMV
CVmed
CDV
1
2
3
4
5
CDV
CMLCDL
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Crista marginais mesial e distal - triangulares
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Sulcos Secundários – Não dividem cúspides
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FossetasPode ser considerado com 3 ou 5 fossetas; Mesial, central e distal; Mésio-central e disto-central.
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Sulcos PrincipaisSulco mésio-distal: sai da fosseta mesial, segue até a fosseta distal, separando as cúspides vestibulares e linguais; Sulco ocluso-vestibular: sai da fosseta central, segue para vestibular, separando cúspides MV e Vmed;
Sulco disto-vestibular: sai da fosseta distal, segue obliquamente para vestibular separando as cúspides DV e Vmed; Sulco ocluso-lingual: sai perpendicular ao sulco MD, segue para lingual separando as cúspides ML e DL.
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Sulco MD em forma de “W”
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Caíque Araujo Siqueira
4.2 Face Oclusal2º MOLAR INFERIOR - TETRACUSPIDADO
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Formato trapezoidal, podendo chegar a retangular
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Cúspides e seus volumes
CMV
CML
CDV
CDL
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Cristas marginais mesial e distal - triangulares
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Sulcos secundários – contido dentro das cúspides
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Fossetas – mesial, central e distal
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Sulcos PrincipaisSulco mésio-distal: sai da fosseta mesial, segue até a fosseta distal, separando as cúspides vestibulares e linguais;
Sulco vestíbulo-lingual: Atravessa a face no sentido vestíbulo-lingual, passando pela fosseta central e separa as cúspides mesiais das distais.
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• AUGUSTO LAMERI SIQUEIRA • CAÍQUE ARAUJO SIQUEIRA
Obrigado!
AULA MOLARES INFERIORES
anatomiadental.com.br
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