anatomy tour for prosthodontics

8/22/2019 Anatomy Tour for Prosthodontics

1/31

Anatomy for Complete andPartial Dentures


2/31

Lips

Vermil ion Border

Denture provides lip support Affects vermilion border width


3/31

Lips

Philtrum

Depression below nose


4/31

Lips

Nasolabial Angle

Angle between columella of nose &

philtrum of lip Normally, approximately 90 as viewed in

profile


5/31

Lips

Tissue of the Upper L ip

Loose tissue of the upper lipcan be gathered between your

thumb and index finger


6/31

Cheeks

Masseter Muscle

Closing muscle bulges into distal corner of

buccal vestibule

Not active during impression making


7/31

Residual Ridges

I f r idges are severely resorbed, inform

patient

U-shape

V-shape


8/31

Vestibules

I f vestibules are shallow, inform the patient


9/31

Maxilla

Maxi l lary Tuberosities

Oversized

Resorbed

Undercut


10/31

Maxilla

Maxi l lary Tuberosities Oversized

Resorbed

Undercut


11/31

Maxilla

I ncisive Papil la

Landmark for setting of teeth


12/31

Maxilla

Hamular Notch

Posterior border denture

Between the bony tuberosity and hamulus

Soft displaceable tissue, for comfort and

retention


13/31

Maxilla

Hamular Notch Posterior border denture

Sometimes posterior to where the depression in

the soft tissue appears Use the head of your mirror to palpate the

notch & mark with an indelible marker


14/31

Maxilla

Soft PalateVibrating Line

Critical posterior border dentures

Junction of movable and immovable

portions of the soft palate


15/31

Maxilla

Glandular Tissue

Soft displaceable


16/31

Maxilla

Soft Palate Fovea Palatine

Bilateral indentations near midline of the soft

palate Close to the vibrating line


17/31

Maxilla

Hard Palate Median Palatine Raphe (midline palatine

suture)

A bony midline structure

May require relief when covered by a denture


18/31

Maxilla

Torus Palatinus

May require removal


19/31

Mandible

Pear Shaped Pad Soft pad containing glandular tissue

Inverted pear shape, posterior border

Created from scarring after extractions


20/31

Mandible

Buccal Shelf

Primary denture bearing area of mandibular

denture

Between height of bridge & external oblique ridge

Resorbs more slowly


21/31

Mandible

Anter ior Border of the Ramus Do not extend dentures to ramus

Discomfort will result


22/31

Mandible

External Oblique Ridge Do not extend dentures to this ridge


23/31

Mandible

Mylohyoid Ridge Origin of mylohyoid muscle which

influences length of lingual flange

Can be prominent, and/or sharp, requiringrelief


24/31

Mandible

Mylohyoid Ridge


25/31

Mandible

L ingual Tor i

Raised bony structures

May require relief when covered by a

denture

Thin mucosa can ulcerate easily


26/31

Mandible

Genial Tubercles

Attachment for the genioglossus muscle

Tubercles may be higher than the ridge

with severe resorption


27/31

Frena (singular = frenum)

Must be relieved to allow movement, withoutimpingement

If prominent, adequate relief can weaken a denture

If too much relief, retention is lost

Check prominence intraorally


28/31

Pterygo-Mandibular Raphe

Connects from the hamulus to themylohyoid ridge

When prominent, can cause pain, or

loosening

Requires relief groove if prominent


29/31

Retrozygomal Fossae (Space)

Palpate zygomatic process in buccal vestibule justbuccal to first maxillary molar

Vestibular space posterior to zygoma


30/31

Retrozygomal Fossae (Space)

Commonly incompletely captured

in preliminary impressions

Use syringe technique


31/31

Coronoid Process

Place mirror head lateral to tuberosity

Move mandible to opposite side

Note binding or pain This gives some indication of the width of

the space for flange

anatomy tour for prosthodontics

Documents