This document discusses the anatomical landmarks of the maxilla that are important for complete denture construction. It defines stress bearing areas, relief areas, and limiting areas. Stress bearing areas include the postero-lateral slopes of the hard palate, residual alveolar ridge, rugae, and maxillary tuberosity. Relief areas are the incisive papilla, mid-palatine raphae, zygomatic process, sharp spiny spicules, torus palatinus, and cuspid eminence. Limiting areas are the labial frenum, labial vestibule, buccal frenum, buccal vestibule, anterior and posterior vibrating lines,
A number of theories have been put forward for impressions. each having its own advantage and disadvantage.
Different spacers guide and aid in in making the desired impression with adequate pressure in the desired region of the arch in maxilla and mandible. different materials are used for spacers depending on the need.
A number of theories have been put forward for impressions. each having its own advantage and disadvantage.
Different spacers guide and aid in in making the desired impression with adequate pressure in the desired region of the arch in maxilla and mandible. different materials are used for spacers depending on the need.
Anatomy and clinical significance of denture bearing areasOgundiran Temidayo
A presentation on the anatomy and clinical significance of the denture bearing areas by Ogundiran Temidayo who is a dental student at OBAFEMI AWOLOWO UNIVERSITY ILE-IFE
Anatomy and clinical significance of denture bearing areasOgundiran Temidayo
A presentation on the anatomy and clinical significance of the denture bearing areas by Ogundiran Temidayo who is a dental student at OBAFEMI AWOLOWO UNIVERSITY ILE-IFE
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ANATOMICAL LANDMARKS OF MAXILLA AND MANDIBLE.pptxKavin73
anatomical landmarks of maxilla and mandibular arch which is useful to bds students especially the first year students in prosthodontic department ,
in this slide we explain completely about the anatomical structure of the maxilla and mandible
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Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more than 5 years without cancer (LS=2958.6±1723.6 days), 22 – more than 10 years (LS=5571±1841.8 days). 67 LCP died because of LC (LS=471.9±344 days). AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0-N12, T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells-CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and N0-12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC (5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct prediction of 5YS was 100% by neural networks computing (error=0.000; area under ROC curve=1.0).
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Explore the benefits of combining Ayurveda with conventional Parkinson's treatments. Learn how a holistic approach can manage symptoms, enhance well-being, and balance body energies. Discover the steps to safely integrate Ayurvedic practices into your Parkinson’s care plan, including expert guidance on diet, herbal remedies, and lifestyle modifications.
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Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
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Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
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Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Rasamanikya is a excellent preparation in the field of Rasashastra, it is used in various Kushtha Roga, Shwasa, Vicharchika, Bhagandara, Vatarakta, and Phiranga Roga. In this article Preparation& Comparative analytical profile for both Formulationon i.e Rasamanikya prepared by Kushmanda swarasa & Churnodhaka Shodita Haratala. The study aims to provide insights into the comparative efficacy and analytical aspects of these formulations for enhanced therapeutic outcomes.
7. Terminologies
Stress bearing area
• the surfaces of oral structures that resist forces, strains, or
pressures brought on them during function
Relief area
• that portion of the dental prosthesis that is reduced to eliminate
excessive pressure
Limiting area
• that limiting boundary of a dental prosthesis
8. Stress bearing areas
• These are the load bearing areas. The denture should be
designed such that most of the load is concentrated on these
areas.
• Support is the resistance to the displacement towards the basal
tissue or underlying structures.
• It can be divided into :
i) Primary stress bearing area
ii) Secondary stress bearing area
9. Relief areas
• Relief areas are areas in the denture bearing area which
should be relieved during construction of the denture.
• They are either resorbed under constant load, having
fragile structures within or covered by thin mucosa which
can be easily traumatized
10. Limiting areas
• These are the sites that will guide us in having an
optimal extension of the denture so as to engage
maximum surface area without engaging upon the muscle
action.
• Encroaching upon these areas will lead to dislodgement
of the denture and/or soreness of the area while failure
to cover the areas up to the limiting structure will
decrease retention, stability and support of the denture.
11. Anatomical landmarks
The clinical application of this knowledge
determines:
1. Selective placement of forces by the
denture bases upon supporting tissues
2. Form of denture borders that will be
harmonious with the normal functioning
of the limiting structures that surround
them.
12. Classification
Maxillary Landmarks
Stress
bearing
Primary
Postero-lateral
slopes of hard
palate
Residual
alveolar
ridge
Secondary/
Support
Rugae
Maxillary
tuberosity
Relief
Incisive
papilla
Median
palatine
raphe
Torous
palatinus
Sharp spiny
processes
Cuspid
eminence
Zygomatic
process
Limiting
Labial
frenum
Buccal
frenum
Labial
vestibule
Buccal
vestibule
Hamular
notch
Vibrating
line
Fovea
palatine
15. Postero-lateral slopes
of hard palate
I) Macroscopic anatomy:
• Formed by palatine processes of
maxillae along the midline
• They support the soft tissues that
increase the surface areas of basal
seat
Postero-lateral slopes of
hard palate
16. Postero-lateral slopes of hard
palate
II) Macroscopic anatomy:
• Mucous membrane:
• Keratinized throughout yet varied
• Submucosa:
• Antero-laterally: adipose tissue
• Postero-laterally: glandular tissue
• Bone:
• Crest: compact in nature with haversian system
Antero-lateral
Adipose tissue
Postero-lateral
Glandular tissue
17. Postero-lateral slopes of hard palate
II) Microscopic anatomy of mucous membrane:
• Keratinized throughout yet varied
• Submucosa:
o Antero-laterally: adipose tissue
o Postero-laterally: glandular tissue
If these tissues are not
recorded in resting condition
Displaced tissues tend to
return to their normal form
Unseating forces on denture
Soreness
secretions from
palatal glands+
18. Residual alveolar
ridge
I) Macroscopic anatomy:
• Following extraction, sockets fill up
with new bone and the process of
remodelling and resorption
continues
• If the teeth are missing for years,
residual ridge may be quite small
and lack cortical bone
crest of residual alveolar
ridge
labial slopes of residual
alveolar ridge
buccal slopes of
residual alveolar ridge
19. Residual alveolar ridge
II) Microscopic anatomy:
• Mucous membrane:
• firmly attached to bone
• Thickly keratinized stratified squamous epithelium
• Thin submucosa is devoid of fat or glandular
cells + dense collagenous fibres in lamina propria
• Bone:
• Crest: compact in nature with haversian system
Tightly attached
mucosa
Compact bone+ = Primary stress
bearing area
Bone
Periosteum
Submucosa
Mucosa
20. Residual alveolar ridge
Clinical considerations:
• Mucous membrane:
• If loosely attached to bone
o Non keratinized epithelium
o Submucosa contains loose connective tissue and elastic fibres
• Bone:
• Crest: If resorbed, it cannot take up stresses
Loosely attached
mucosa
Resorbed
ridge
+ = Relief area
21. Rugae
I) Macroscopic anatomy:
• They are irregularly shaped rolls of soft
tissue in the anterior part of palate.
• They should not be distorted during
impression procedure since rebounding
distorted tissue tends to unseat the
denture
Rugae
Prominent rugae = Relief area
22. Maxillary tuberosity
I) Macroscopic anatomy:
• Low hanging tuberosity is complicated by
excess fibrous connective tissue.
• This tissue can prevent proper location of
occlusal plane if not removed.
• Rough and irregular bone could cause
irritation from denture base
Maxillary tuberosity
25. Incisive papilla
I) Macroscopic anatomy:
• Incisive papilla covers the incisive foramen,
located on midline immediately between
central incisors
• It may have a variable position from one
individual to other
• The central location on the ridge indicates
the rate of resorption
Incisive papilla
27. Significance of incisive
papilla
Midline landmark
Relief area: Overlies on the orifice of nasopalatine canal
Maxillary central incisors are placed 8-12mm ahead of the incisive
papilla
Canine-Papilla-Canine (CPC) line: for arrangement of maxillary
canines
Mandibular incisors are placed 4 mm below the incisive papilla
Location of incisive papilla gives an indication of amount of
residual ridge and aids in determination of vertical height
28. Mid palatine raphae
• Location: junction of palatine processes of maxillae
• Covered with thin layer of mucosa
Mid palatine raphae
29. Mid palatine raphae
• Mucous membrane:
• Mucosal layer is in contact with underlying bone
• Extremely thin submucosa
Non- resilient mucosa
Little of no stress over the raphae
during impression making
Denture will tend to rock over center
of the palate due to vertical forces
Non- resilient mucosa
Highly sensitive to excess pressure
Excruciating pain
Needs relief
Compact bone
Submucosa
Mucosa
30. Torus palatinus
• A hard bony enlargement in the midline
of palate is called torus palatinus
• Type 1: Entirely soft tissue: loose and
flabby
• Type 2: Bone covered with thin mucosa
• Providing relief to larger tori may
compromise stability of denture
• Surgical reshaping may be required in
larger tori
Torus palatinus
31. Sharp spiny spicules
• Spiny processes on maxillary and palatal
bones deeply covered with soft tissue
• In resorbed ridge, these spicules irritate
the soft tissue between them and denture
base
• The canal leading from posterior palatine
foramina often has sharp overhanging
edge which may cut and irritate palatal
soft tissue due to pressure from denture
Sharp spiny spicules
32. Cuspid eminence
Cuspid eminence
• Protruding bony ridge around maxillary canine
• Significance: severe prominence must be provided relief
33. Zygomatic process
• It is close to residual alveolar ridge in
malar region because of excess amount of
resorption of alveolar ridge.
• It is thinly covered by mucous membrane.
• May cause soreness if not adequately relieved
Zygomatic process
Location:
opposite first
molar
35. Limiting areas
Labial frenum
Labial vestibule
Buccal frenum
Buccal vestibule
Anterior vibrating
line
Posterior vibrating
line
Fovea palatini
Hamular notch
36. Labial frenum
Labial frenum
• Fold of mucous membrane at median line
• No muscles
• Band of tissue starts superiorly in a fan shape
• Labial notch in the labial flange should be just wide and
deep enough to pass through it without manipulation of lip.
• Also, the denture flange should have lower thickness around
the frenum and can be beaded.
37. Buccal frenum
• Sometimes single fold of mucous membrane,
sometimes double.
• Requires more clearance than labial frenum
• Muscle attachments:
• Levator anguli oris (caninus): beneath
• Orbicularis oris: pulls the frenum forwards
• Buccinator: pulls the frenum backwards
Buccal freni
38. Buccal frenum
• The buccal frenum is a part of
continuous band of tissue going from
modiolus in the corner of the mouth
to buccal frenum on mandible
• Inadequate relief of frenum or excess
thickness of flange distal to buccal
notch can cause dislodgement of
denture when cheeks move
posteriorly
39. Labial vestibule
• a space lined by a thin mucous
membrane, extends on both sides of
the arch from the labial frenum to
buccal frenum
• Boundaries:
• Externally: upper lip
• Internally: residual ridge in edentulous
mouth
Labial vestibule
40. Buccal vestibule
• It extends from buccal frenum to hamular notch.
• Provides space for the buccal flange of the denture.
• Size varies due to:
• Contraction of buccinator muscle
• Position of mandible
• Amount of bone lost from maxilla
Buccal vestibule
41. Microscopic
anatomy of
vestibule
• Relatively thin and non
keratinized epithelium
• Submucosa:
• Thick
• Loose areolar tissue
• Elastic fibres
• Tissues are easily
movable
Labial and buccal flanges of
upper impression can be
easily over extended
42. Buccal vestibule: distobuccal
• The distobuccal flange of denture must be adjusted
to accommodate the ramus, coronoid process and
masseter in function
• The flange should not be too thick or the ramus
will push the denture out of place during opening
and lateral movements of mandible
Buccal vestibule
43. Buccal vestibule: distobuccal
Buccal vestibule
Mandible
Forwards or
laterally
Width of disto-
buccal vestibule
reduces
Masseter
Contraction under
pressure
Width of disto-
buccal vestibule
reduces
Mandible
Wide opening
Obscures disto-
buccal
vestibule:
decieving
44. Fovea palatini
• They are indentations near the midline of
palate formed by coalescence of several
mucous gland ducts
• They are close to vibrating line and are
always in soft tissue
• Ideal guide for location of posterior
border of denture
Fovea palatini
45. Hamular/ pterygomaxillary notch
• Situated between the tuberosity of
maxilla and hamulus of medial
pterygoid plate
• It is boundary of posterior border of
maxillary denture
• The posterior palatal seal is placed
through the center of deep part of
hamular notch
• No muscles, no ligaments
Hamular notch
46. Hamular/ pterygomaxillary notch
Significance:
• Overextended denture will cause
impingement on pterygopalatine
raphae (extending from pterygoid
hammulus to retromolar pad)
• Lacerations will lead to trismus
Hamular notch
47. Vibrating lines
• The vibrating line is an imaginary line
drawn across palate that marks the
beginning of motion in soft palate when
the patient says “ah”
• Posterior and anterior
• Posterior vibrating line is always on
soft palate
• Shape varies according to anatomy of
palate
• Distal end of upper denture must
extend atleast to posterior vibrating
line (1-2 mm posterior)
Vibrating lines
anterior
posterior
48. Microscopic anatomy of
vibrating lines
• Submucosa
• Glandular tissue
Secretions from glandular tissue affects the
choice of final impression material
Soft palate does not rest directly on bone
Few mm on either side of vibrating line can be
repositioned on impression to achieve posterior seal
49. Posterior palatal seal
Posterior palatal seal: that portion of the
intaglio surface of a maxillary removable
complete denture, located at its posterior border,
which places pressure, within physiologic limits,
on the posterior palatal seal area of the soft
palate; this seal ensures intimate contact of the
denture base to the soft palate and improves
retention of the denture
Synonyms: postpalatal seal
Posterior palatal seal
Glossary of Prosthodontic Terms - 9
50. Posterior palatal seal
• Posterior palatal seal area: the soft tissue area
limited posteriorly by the distal demarcation of
the movable and non-movable tissues of the soft
palate and anteriorly by the junction of the hard
and soft palates on which pressure, within
physiologic limits, can be placed; this seal can
be applied by a removable complete denture to
aid in its retention
Posterior palatal seal
Glossary of Prosthodontic Terms - 9