How important is it to capture all anatomical landmarks in impressions for dentures and digital dentures?

Design software relies on landmarks to make intelligent decisions about denture design
Borders, extensions, and contours are calculated based on anatomical references
Incomplete landmark capture results in poorly designed dentures, regardless of downstream technology
Digital technology cannot compensate for inadequate clinical information
This requirement is unchanged from conventional dentures and is a fundamental prosthodontic principle)

Maxillary Anatomical Landmarks	Record Requirements & Rationale
Tuberosities (Bilateral)	Define the posterior extent of denture base Establish a relationship between the hard and soft palate Critical for posterior palatal seal location Inadequate capture results in over-extended or under-extended posterior border Software uses tuberosities to determine appropriate hamular notch coverage
Incisive Papilla	Anterior landmark for palatal coverage Reference point for anterior tooth positioning Helps establish arch form and tooth arrangement Missing this landmark results in incorrect anterior-posterior tooth positioning Software uses this positioning to correlate with facial midline
Hamular Notches (Bilateral)	Define the lateral extent of the posterior palatal seal Critical for retention through the peripheral seal Inadequate capture compromises posterior denture stability Software calculates seal depth and width based on these landmarks Missing hamular notches results in either over-extension (gagging) or under-extension (poor retention)
Fovea Palatinae	Indicates the junction of the hard and soft palate Reference for posterior palatal seal anterior border Helps software determine an appropriate vibrating line location Missing this causes incorrect posterior extension decisions
Rugae Pattern	While not critical for border determination, it adds esthetic realism Some design software incorporates rugae into denture base design Provides patient-specific anatomy for improved comfort Can help with speech adaptation

Mandibular Anatomical Landmarks	Record Requirements & Rationale
Retromolar Pads (Bilateral)	Define the posterior extent of the mandibular denture Critical reference for establishing distal extension Software uses this to prevent over-extension into the pterygomandibular raphe Inadequate capture results in patient discomfort and instability One-third to one-half of the retromolar pad should be covered by the denture
Buccal Shelf Areas (Bilateral)	Primary stress-bearing areas of the mandibular denture Critical for denture stability during function Software designs base contours to maximize contact with the buccal shelf Missing these areas compromises load distribution and causes accelerated resorption
Lingual Frenum	Critical landmark for anterior lingual border relief Prevents impingement that causes ulceration and discomfort Software automatically creates relief based on frenum location Inadequate capture results in immediate patient complaints after delivery
Mandibular Tori (If Present)	Must be captured to allow the software to design appropriate relief Failure to capture results in pressure points and instability Software can design precise relief contouring around tori Patient discomfort results if not addressed in the design
Mylohyoid Ridge	Lateral lingual border determining landmark Software uses to establish lingual flange extension and contour Over-extension beyond mylohyoid causes tongue interference Under-extension compromises retention

Consequences of inadequate anatomical landmark capture:

Software makes incorrect assumptions about tissue anatomy
Denture borders may be over-extended, causing discomfort, gagging, and instability
Denture borders may be under-extended, causing poor retention and food impaction
Stress distribution is calculated incorrectly leading to accelerated resorption
Remake required wasting time, materials, and damaging patient confidence

What is your quality control checklist for denture records:

Before sending impressions to the laboratory, and verify all landmarks are visible
Use good lighting and magnification to inspect impressions
Compare the impression to the checklist of required landmarks
If any landmark is missing or unclear, retake the impression
Photograph impressions for documentation if concerned about quality

Communication with ROE:

If anatomical variations are present (tori, severe resorption), note in the Rx
Photograph unusual anatomy and send with impressions
Request ROE to contact you if the landmarks unclear in the scan
Better to remake impression than proceed with inadequate information

Additional Resources

For more information concerning the digital dentures:

Contact Information

For help with a digital denture solution for your next case, contact ROE Dental Laboratory:

Phone: (216) 663-2233
Email: info@roedentallab.com