prof.dr. ahlam el-sharkawy head of prosthodontic departement pharos university in alexandria pharos...

Prof.Dr. Ahlam El-SharkawyProf.Dr. Ahlam El-SharkawyHead of prosthodontic Head of prosthodontic departementdepartement

Pharos University in Pharos University in AlexandriaAlexandria

Dr. house

•In general, posterior denture base flange should be at least 2mm thick and should

display rounded borders.

Costen’s Syndrom

1 -Vestibulo – cochlear Nerve ( 8th cranial nerve)

2 -Chorda Tympani Nerve(Branch from Facial Nerve-7th c.n)

3-Auriculo-Temporal Nerve(Branch from Mandibular n . which is Branch from Trigeminal n. 5th c.n(

I – Otological Symptoms :

Pressure on Vestibulo-Cochlear n.

1 -Tinnitus2 -Mild Catarral Deafness

3 -Vertigo

II – Oral SymptomsPressure on Chorda Tympani

1 -Burning Sensation in the ant. 2/3 of the Tongue

2 -Metalic Taste

3 -Xerostomia

III – T.M.J and Peri auricular Symptoms

Pressure on Auriculo-temporal n.

1 -Pain in T.M.J

2-Pain in the Ear

3-Pain in the Periauricular Region

1 -labial Sound2 -Dental Sound

3-Labio-dental Sound4-Linguo-dental Sound5 -Linguo Palatal Sound

-It results from contact between upper and

-lower Lips to pronounce-: [ B,P,M]

-Result from Relation Between Incisal Edge Of Upper ant. Teeth

and Lower ant. Teeth to Pronounce ( S )

Result from Contact Between Lower Lip and Incisal Edge of Upper ant.

Teeth to Pronounce ( F , V )

Result from Contact Between Tip of Tongue and Incisal Edge of

Upper anterior Teeth to Pronounce ( Th )

-Results from: A- Contact Between Tip of the Tongue and ant. Part of the palate to Pronounce ( T , D )

B- Contact Between Tip of the Tongue and Middle Part of the Palate to Pronounce ( H )

Lisping---whistling