Related Experiment Video
Updated: Aug 13, 2026
04:11
The Establishment of a Murine Maxillary Orthodontic Model
Published on: October 27, 2023
The Relationship between molar dentoalveolar and craniofacial heights
Roberto Martina1, Mauro Farella, Renato Tagliaferri
1University of Naples Federico II, Dental and Maxillo Facial Sciences, Naples, Italy.
The Angle Orthodontist
|February 2, 2006
Summary
Excessive vertical growth in the posterior dentoalveolar region is linked to long-face syndrome. This study found that lower facial height and jaw divergence impact molar dentoalveolar height, suggesting reduced vertical development in some individuals.
Area of Science:
- Orthodontics and Craniofacial Biology
- Dentofacial Morphology Analysis
Background:
- The long-face syndrome is associated with excessive vertical growth in the posterior dentoalveolar region.
- Understanding the relationship between craniofacial features and dentoalveolar heights is crucial for diagnosing and treating such conditions.
Purpose of the Study:
- To investigate the relationship between vertical craniofacial features and molar dentoalveolar heights.
- To test the hypothesis that molar dentoalveolar heights are positively related to vertical craniofacial dimensions.
Main Methods:
- Cephalometric measurements were analyzed from 82 adult subjects.
- Multiple regression analysis was employed with maxillary and mandibular molar dentoalveolar heights as dependent variables.
- Anterior lower facial height (ANS-Me) and mandibular palatal plane angle (PP-MP) were used as independent variables.
Main Results:
- Anterior lower facial height (ANS-Me) and the mandibular palatal plane angle (PP-MP) explained approximately 70% of the variance in molar dentoalveolar heights.
- These two variables had opposing effects on molar dentoalveolar heights.
- Reduced molar dentoalveolar heights were observed in subjects with a small ANS-Me and a wide PP-MP angle.
Conclusions:
- Vertical craniofacial dimensions, specifically anterior lower facial height and jaw divergence, significantly influence molar dentoalveolar vertical development.
- Individuals exhibiting a marked divergence of the jaws may present with reduced molar dentoalveolar vertical growth.
- These findings contribute to understanding the etiology of the long-face syndrome and inform orthodontic treatment planning.
Related Concept Videos
01:15Teeth
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
01:08Overview of the Skull
The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
01:27Cranial Bones: Lateral View
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
01:14Cranial Bones: Superior and Posterior View
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
01:22Sutures of the Skull
The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
01:21Tooth Anatomy
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.