development of soft palate
DEVELOPMENT OF SOFT PALATE
Primary Palate- Triangular area of hard palate anterior to incisive foramen
Forms during 4th to 7th week of Gestation
Two maxillary swellings merge and two medial nasal swelling fuse
Formed by the fusion of medial nasal processes
Secondary Palate- Remaining hard palate and all of soft palate
Forms in 6th to 9th weeks of gestation
Palatal shelves change from vertical to horizontal position and fuse
Formed by fusion of maxillary process
ANATOMY:-
Soft palate is musculo-membranous curtain that separates the oropharynx from the oral space and the nasopharynx from the nasal space. It functions as flap valve closes off nasopharynx during swallowing. Its anterior margin is attached to the posterior border of hard palate by fibrous tissue known as palatal aponeurosis i.e. it is a collection of muscles with central aponeurosis.
It is continuous with the floor of the nasal cavity and covered with pseudo-stratified columnar ciliated epithelium and oral surface is covered by stratified squamous epithelium.
Anatomic factors-
The anatomy of the soft palate reveals a symmetrical and a radial distribution of the muscles and their fibers. The soft palate is part of a dual valve system which separates the oropharynx from the oral space and the nasopharynx from the nasal space. The function of the soft palate in these dual valving actions requires freedom of movement in three dimensions or planes of space, i.e., superoinferiorly, mediolaterally, and anteroposteriorly. A denture which contacts the soft palate then must conform to the requirements for freedom of movement of the palate. Therefore, an impression should be made when the soft palate is placed at a desired denture border position. This functional position of the soft palate may be achieved when the patient, seated in the upright position, flexes his head 30 degrees forward and places his tongue under tension against either the handle of the impression tray or the
Primary Palate- Triangular area of hard palate anterior to incisive foramen
Forms during 4th to 7th week of Gestation
Two maxillary swellings merge and two medial nasal swelling fuse
Formed by the fusion of medial nasal processes
Secondary Palate- Remaining hard palate and all of soft palate
Forms in 6th to 9th weeks of gestation
Palatal shelves change from vertical to horizontal position and fuse
Formed by fusion of maxillary process
ANATOMY:-
Soft palate is musculo-membranous curtain that separates the oropharynx from the oral space and the nasopharynx from the nasal space. It functions as flap valve closes off nasopharynx during swallowing. Its anterior margin is attached to the posterior border of hard palate by fibrous tissue known as palatal aponeurosis i.e. it is a collection of muscles with central aponeurosis.
It is continuous with the floor of the nasal cavity and covered with pseudo-stratified columnar ciliated epithelium and oral surface is covered by stratified squamous epithelium.
Anatomic factors-
The anatomy of the soft palate reveals a symmetrical and a radial distribution of the muscles and their fibers. The soft palate is part of a dual valve system which separates the oropharynx from the oral space and the nasopharynx from the nasal space. The function of the soft palate in these dual valving actions requires freedom of movement in three dimensions or planes of space, i.e., superoinferiorly, mediolaterally, and anteroposteriorly. A denture which contacts the soft palate then must conform to the requirements for freedom of movement of the palate. Therefore, an impression should be made when the soft palate is placed at a desired denture border position. This functional position of the soft palate may be achieved when the patient, seated in the upright position, flexes his head 30 degrees forward and places his tongue under tension against either the handle of the impression tray or the