What is the embryological basis for the palatal process?

The primary palate is formed in this period by fusion/merging of the medial nasal and maxillary processes. Subsequently, between 6th and 12th embryonic/fetal weeks, the secondary palate is formed as the result of fusion between palatal processes growing from the oral surfaces of the maxillary processes.

What are the 3 stages of palatal formation?

The formation of palate starts in the 5th week from two separate embryonic structures; primary palate and secondary palate. Completed in 12th week. Developed in three different stages; formation of primary palate, formation of secondary palate, and completion of final palate.

During which embryonic weeks does the palate develop?

During the sixth to 10th week of embryological development, the foundation for the hard palate and the floor of the nasal cavities, the palatine shelves, begins their migration toward the midline of the internal face.

How do palatal shelves form?

These palatal shelves commence development as processes that grow downwards from the maxillary processes each side of the tongue. They then elevate to a horizontal position and extend across the top of the tongue to meet along the midline (Figure 19.6).

In what phase of development of the normal lip and palate is palate formed?

These three prominences on the child’s developing face grow towards the center of the face and fuse together during the 6th to 13th weeks of pregnancy. When this happens correctly, the child’s lips, mouth, and palate develop normally.

Which embryological structure does the face develop?

The ectoderm is well around the stomodeum by the fourth week of embryonic development and contributes to the formation of the face and the nasal and oral cavities.

What processes form the palate?

The palate is formed by the palatal processes of the maxilla. The central part of the lip (prolabium) and the premaxilla arise from the medial nasal prominences of the frontonasal process and the lateral alveolar segments from the lateral processes of the maxilla.

What is the median palatine process?

The primary palate, also known as the median palatine process, begins to form from the innermost portion of the intermaxillary segment of the maxilla. This segment is formed by the fusion of paired median nasal processes and maxillary prominences.

What week does the palate fuse?

7th week of
The embryologic development of the primary palate begins very early in gestation, and the upper lip and primary palate have usually fused by the 7th week of gestation. A failure of fusion of the medial and lateral nasal processes with maxillary process produces cleft lip with or without cleft palate.

Does the palate form before the lip?

The lips and palate originate from three areas of the baby’s developing face: Central or Frontal Nasal Prominence: normally grows to become the forehead, nose, middle portion of the upper lip (philtrum or Cupid’s bow) and the primary palate (part of the upper jaw that holds the middle four teeth)

What are palatine shelves?

a medially directed outgrowth of the embryonic maxilla; when fused with its opposite number it forms the secondary palate. Synonym(s): lateral palatal shelf, palatal shelves.

Which process occurs when the secondary palate formation?

It is characterised by the formation of two palatal shelves on the maxillary prominences, the elevation of these shelves to a horizontal position, and then a process of palatal fusion between the horizontal shelves….

Is the palate developed in fetal materials?

The development of the palate was investigated in 40 (21 males, 19 females) fetal materials aged between the 17th and 40th gestational week.

Is the levator veli palatini developing in human embryos and fetuses?

Three-dimensional imaging of palatal muscles in the human embryo and fetus: Development of levator veli palatini and clinical importance of the lesser palatine nerve “The development of LVP in human embryos and fetuses has not been systematically analyzed using the Carnegie stage (CS) to standardize documentation of development.

When does the lip and palate develop in human embryos?

Using 43 staged human embryos and early fetuses ranging from the 4th to 12th week of development, we investigated the development of the lip and palate in order to provide the basic developmental concepts required for managing these anomalies.

What is the process of palatogenesis?

During mammalian palatogenesis, cranial neural crest-derived mesenchymal cells undergo osteogenic differentiation and form the hard palate, which is divided into palatine process of the maxilla and the palatine.