Anatomy for Complete and Partial Dentures Lips Vermilion
- Slides: 31
Anatomy for Complete and Partial Dentures
Lips • Vermilion Border – Denture provides lip support • Affects vermilion border width
Lips • Philtrum – Depression below nose
Lips • Nasolabial Angle – Angle between columella of nose & philtrum of lip – Normally, approximately 90° as viewed in profile
Lips • Tissue of the Upper Lip – Loose tissue of the upper lip can be gathered between your thumb and index finger
Cheeks • Masseter Muscle – Closing muscle bulges into distal corner of buccal vestibule – Not active during impression making Open Closed Cross Sectional Shape of Masseter
Residual Ridges • If ridges are severely resorbed, inform patient – “U”-shape – “V”-shape
Vestibules • If vestibules are shallow, inform the patient
Maxilla • Maxillary Tuberosities – Oversized – Resorbed – Undercut
Maxilla • Maxillary Tuberosities – Oversized – Resorbed – Undercut
Maxilla • Incisive Papilla – Landmark for setting of teeth
Maxilla • “Hamular” Notch – Posterior border denture • “Soft displaceable tissue”, for comfort and retention
Maxilla • “Hamular” Notch – Posterior border denture • Between the bony tuberosity and hamulus
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
Maxilla • Soft Palate – Vibrating Line • Critical posterior border dentures • Junction of movable and immovable portions of the soft palate
Maxilla • Glandular Tissue – Soft displaceable
Maxilla • Soft Palate – Fovea Palatine • Bilateral indentations near midline of the soft palate • Close to the vibrating line
Maxilla • Hard Palate – Median Palatine Raphe (midline palatine suture) • A bony midline structure • May require relief when covered by a denture
Maxilla • Torus Palatinus – May require removal
Mandible • Pear Shaped Pad – Soft pad containing glandular tissue – Inverted pear shape, posterior border – Created from scarring after extractions
Mandible • Buccal Shelf – Primary denture bearing area of mandibular denture – Between height of bridge & external oblique ridge – Resorbs more slowly
Mandible • Anterior Border of the Ramus – Do not extend dentures to ramus – Discomfort will result
Mandible • External Oblique Ridge – Do not extend dentures to this ridge
Mandible • Mylohyoid Ridge – Origin of mylohyoid muscle which influences length of lingual flange – Can be prominent, and/or sharp, requiring relief
Mandible • Lingual Tori – Raised bony structures – May require relief when covered by a denture – Thin mucosa can ulcerate easily
Mandible • Genial Tubercles – Attachment for the genioglossus muscle – Tubercles may be higher than the ridge with severe resorption
Frena (singular = frenum) • Must be relieved to allow movement, without impingement • If prominent, adequate relief can weaken a denture • If too much relief, retention is lost • Check prominence intraorally
Pterygo-Mandibular Raphe • Connects from the hamulus to the mylohyoid ridge • When prominent, can cause pain, or loosening • Requires relief “groove ” if prominent
Retrozygomal Fossae (Space) • Palpate zygomatic process in buccal vestibule just buccal to first maxillary molar • Vestibular space posterior to zygoma
Retrozygomal Fossae (Space) • Commonly incompletely captured in preliminary impressions • Use syringe technique
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
- Denture lips
- Adams clasp indications
- Best impression material for partial dentures
- Indication of removable partial denture
- Extra coronal retainer
- Combination syndrome dental
- Protrusive record complete dentures
- Squint test for shade selection
- Vermilion association for special education
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- Vibrating line denture
- Gaten matarazzo dentures
- Larell dentures
- Guiding plane proximal plate
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- Class 2 mod 3 rpd design
- Spoon denture
- Retainer clasp
- Farm planning
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- Abdominal assessment percussion
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- Lips software