In the first scenario, it can be due to a genetic condition, trauma to the spine, pregnancy in women, increased abdominal fat or a sedentary lifestyle (sitting too much causes muscle imbalances and is the most common reason for this issue) and in the second scenario, the estrogen weakens the muscles in the area.Merely slouching doesnt cause height loss even though it may make a person look shorter, slouching may lead to perceived height loss whereas lumbar hyperlordosis leads to actual and measured height loss. To make it easier to understand the difference, if a person loses a vertebra (which is around 2 inches or 5 centimeters in height) in his or her spine, it doesnt matter if he or she slouches or not, he or she will be shorter regardless of his or her posture. Lumbar hyperlordosis, of course, doesnt make you lose a vertebra but it bends them in such a way that your spines vertical height is reduced.Although lumbar hyperlordosis gives an impression of a stronger back, it can lead to moderate to severe lower back pain. The most problematic symptom is that of a herniated disc where the individual has put so much strain on the back that the discs between the vertebrae have been damaged or have ruptured. Technical problems with dancing such as difficulty in the positions of attitude and arabesque can be a sign of weak iliopsoas. Tightness of the iliopsoas results in a dancer having difficulty lifting their leg into high positions.
An example of hereditary mandibular prognathism can be seen amongst the Hapsburg Royal family where one third of the affected individuals with severe class III malocclusion had one parent with a similar phenotype The frequent presentation of dental malocclusions in patients with craniofacial birth defects also supports a strong genetic aetiology. About 150 genes are associated with craniofacial conditions presenting with malocclusions. Micrognathia is a commonly recurring craniofacial birth defect appearing among multiple syndromes. For patients with severe malocclusions, corrective jaw surgery or orthognathic surgery may be carried out as a part of overall treatment, which can be seen in about 5% of the general population. See also
Crossbite
Elastics
Facemask (orthodontics)
Maximum intercuspation
Mouth breathing
Occlusion (dentistry)

References
Further reading
Peter S. Ungar, "The Trouble with Teeth: Our teeth are crowded, crooked and riddled with cavities. It hasnt always been this way", Scientific American, vol. 322, no. 4 (April 2020), pp. 44–49. "Our teeth [...] evolved over hundreds of millions of years to be incredibly strong and to align precisely for efficient chewing. [...] Our dental disorders largely stem from a shift in the oral environment caused by the introduction of softer, more sugary foods than the ones our ancestors typically ate." == External links ==