temporal and infratemporal region part 4

HeadandNeckTemporalandInfratemporalregionspartIV

MaxillaryArteryandtempromandibularjoint

Dr.MohamedElFikyProfessorofAnatomyandembryology

MaxillaryArteryOrigin:IsthelargerofthetwoterminalbranchesoftheexternalcaroEdartery.Arisesbehindtheneckofthe

mandiblewithinthe,substanceofTheparoEdgland.Courseandrela5ons:fordescripEvepurpose

theartery isdivided into threepartsby thelateralpterygoidmuscle.(1) The first part: runs horizontally first

between the neck of the mandible and thesphenomandibular ligament. and thenalong

thelowerborderofthelateralptrygoid.(2) The second part: runs upwards and

forwards either superficial or deep to thelowerheadofthelateralpterygoid.(3) The third part:passes between the two

heads of the lateral pterygoid and throughthe pterygomaxillary fissure to enter thepterygopalaEnefossa.

ExternalCaroEdArtery

MaxillaryArtery

LateralPterygoid

SphenomandibularLigament

MedialPterygoidMuscle

MaxillaryArtery

MaxillaryArtery

SphenomandibularLigament

NeckoftheMandible

DeepHeadofMedialPterygoid

BranchesofMaxillaryArtery

3-Middllemeningeal

4-Accessorymeningeal

1-Deepauricular2-Anteriortympanic

5-Inferioralveolar

1-BranchesofTheFirstPart

Inferioralveolarartery

MandibularForamen

MentalArtery

MylohyoidArtery

MylohyoidMuscle(MylohyoidDiaphragm)

MylohyoidArteryandNerve

1-Deeptemporal

2-Pterygoidarteies

3-Massetericartery4-Buccalartery

2-BranchesofTheSecondPart

2-Posteriorsuperioralveolar

1-DescendingpalaEne

3-SphenopalaEne4-ArteryofPterygoidcanal

5-Pharyngealartery

6-Infraorbitalartery

LesserPalaEne

GreaterPalaEne

3-BranchesofTheThirdPart

Pterygoidplexusofveins

MaxillaryVein

SuperficialTemporalVein

RetromandibularVein

MaxillaryVeinandPterygoidPlexusofVeins

PterygoidPlexusofVeinsMaxillaryVein

SuperficialTemporalVein

RetromandibularVein

PterygoidPlexusofVeins

1-AnteriorFacialVein

2-CavernousSinus3-InferiorOphthalmicVein

4-ToPharyngealPlexusofVeins

DeepFacialVein

Communica5onsofPterygoidPlexusofVeins

MandibularFossaArEcularEminence

HeadofTheMandible

Type:Condylarvarietyofsynovialjoint.Ar5cularsurfaces:(A)Fromabove:(1)arEculartubercle(eminence);and(2)mandibularfossa.(B)Frombelow:headofmandible.Capsule:Isa\achedtothemarginsofthearEcularsurfaces.(A)Above:tothearEculartubercleandthecircumference.ofmandibularfossa.(B)Below:totheneckofthemandible.Synovialmembrane:Linesthecapsuleandtheneckofthemandible.

TypeandArEcularSurfaces

Intra-arEcularDisc

SynovialSaddleVariety

CondylarSaddleVariety

Ar5culardisc

*IsanovalplateoffibrousEssuethatdividesthejointintoupperandlowercompartments.*ItsuppersurfaceisconcavoconvextofitthearEculartubercleandthemandibularfossa.*Itslowersurfaceisconcavetofitintotheheadofthemandible.*Isa\achedbyitscircumferencetotheinnersurfaceofthecapsule.

1-LateralTemporomandibular

2-TheSphenomandibularLigament

3-TheStylomandibularLigament

4-PterygomandibularLigament

AccessoryLigamentsofTMJ1-LateralTemporomandibular2-TheSphenomandibularLigament3-TheStylomandibularLigament4-PterygomandibularLigament

Buccinator

Superiorconstrictor

Pterygomandibularligament

MaxillaryArtery

SuperficialTemporalArtery

BloodSupplyofTMJ

AuriculotemporalNerve

FromNervesToMusclesofMasEcaEon

NerveSupplyofTMJ

1-PosiEonatRest

1-slightintervalbetweenupperandlowerteeth2-Lowerteethlieslightlybehindtheleveloftheupperteeth.

Movements2-OcclusalPosiEon

3-ProtracEonofTheMandible

ByLateralandMedialPterygoidMusclesAndmasseter

4-RetracEonofTheMandible

ByPosteriorFibersofTemporalis,DigastricandGeniohyoidMuscles

Movements

5-DepressionofTheMandible(OpeningoftheMouth)

ByLateralPterygoid,Platysma,Digastric,MylohyoidandGeniohyoidMuscles

Movements6-ElevaEonofTheMandible(ClosureoftheMouth)

ByTemporalis,MasseterandMedialPterygoid

7-SidetoSideMovementofTheMandible(Grinding)(Chewing)

ByLateralandMedialPterygoidMuscles

Movements

AnteriorDislocaEonofTheMandible

Disloca5on

DislocaEonofTemporomandibularJoint

Thank You