ORAL PHYSIOLOGY & OCCLUSION
Group of Structures that Comprises the Stomatognathic System.
- Receptor Group (receptor cells; nerves, senses)
At about 27 days this membrane raptures and the stomodeum establishes a connection with the foregut (future digestive tract)
At 6 weeks old, the first sign of tooth development is seen
ORAL STOMODEUM
The oral ectoderm will give rise to the oral epithelium that runs along the outline of the future dental arches, which is called the Dental Lamina (invagination that forms 2 thicker bands; Vestibular Lamina and Dental Lamina
dental lamina
ORAL PHYSIOLOGY & OCCLUSION
is a system composed of several parts capable of acting as a single unit for the process of acting as a single unit for the process of:
Mastication (major function)
Deglutition (swallowing)
Phonation (sound)
Respiration (breathing)
Other behavioral characteristics/activities
Stomatognathic System
Oral Stomodeum is the primitive oral cavity that begins to develop at 3 ½ weeks of fetal life
It is lined with an ectoderm and unites with the endoderm to form the buccopharyngeal membrane
is a system that comprises of a highly coordinated structures comprising the human masticatory apparatus (oral cavity)
Development of The Oral Cavity
Physiology
A science which deals with the study of normal tissue function of a normal living body
Simultaneous with the differentiation of the Dental Lamina, there arises round or ovoid swellings at 10 different points in each jaw, corresponding to the future position of the deciduous dentition (Tooth Buds)
Cheeks
Forms the lateral boundary of the vestibule of the mouth
Buccinator muscle - is the major muscle that makes up the cheek
Composed of the following:
- Skin
- Superficial fascia
- Buccopharyngeal fascia
- Buccinator muscle
- Submucous layer
- Mucous membrane
Blood Supply
- Superior labial artery
- Inferior labial artery
Nerve Supply
Infra-orbital nerve - from the maxillary nerve and supplies the upper lip
Mental nerve - from mandibular nerve and supplies lower lip
- Muscular Group (muscles)
- Salivary Glands
- Organs of the Digestive System (digestion starts from the mouth)
- Organs of the Respiratory System
Oral Cavity Proper
Larger, inner portion
Boundaries
Anterolaterally - alveolar arches with their teeth
Superiorly - hard and soft palate
Inferiorly - tongue and mucous membrane from the side of the tongue to the gums
Dental lamina
Composed of the following layers:
- Skin
- Superficial fascia
- Orbicularis oris muscle
- Submucous layer
- Mucous membrane
Frenulum of the upper and lower lips - vertical mucous folds found on the internal surface of the lips connecting them to the gums
tooth bud
lips
Divisions of the Oral Cavity
Vestibule
Smaller, outer portion
Boundaries
Anterolaterally - lips and cheeks
Posteromedially - gums and teeth
Superior and inferiorly - mucous membrane from the lips and cheeks to the gums
Parts:
- Angle of the mouth - points where the upper and lower lips meet at the sides
- Naso-labial groove - from the side of the nose to the angle of the mouth
- Mentolabial groove - between chin and lower lip
- Philtrum - from the inferior border of the nose to the upper lip
Parts of Oral Cavity
Enamel Organ (Enamel)
Dental Papilla (Dentin & Pup)
Dental Sac (Cementum Periodontal Ligament, Alveolar Bone)
General Physiology
Two mobile folds that encircle the rima oris (mouth)
-Rima/orbicularis oris - sphincter muscle of the mouth
-Covered by skin on its external surface and mucous membrane on its internal surface
ORAL CAVITY
-is the first portion of the alimentary canal or digestive tract
Boundaries
- Anteriorly – lips
- Laterally – cheeks
- Superiorly - hard and soft palate
- Inferiorly - floor of the mouth and tongue
-is the study of the basic activities of living organisms as a whole emphasizing on function and dynamic changes
-occurs within cells, tissues and blood vessels
Oral Physiology
Thank You
Definition of Terms
A branch of General Physiology which focuses on the function of the different parts in the oral cavity as well as its associated structures. It deals with the masticatory apparatus (all structures and organs involved in mastication)
design by Dóri Sirály for Prezi