Research Done in Sydney Says Biting and Chewing Trigger Tooth Growth

Research Done in Sydney Says Biting and Chewing Trigger Tooth Growth

Sydney, Australia- A research done at the University of Sydney has found that chewing and biting is the cause of adult teeth breaking through the gums rather than an innate unknown force. The researchers used CT scan images of an 8 year old child's mandible to design a 3D model that could be used to observe the forces by the jaw when biting and chewing. The aim of the study was to show the stress dispersion within the jaw when a person bites and chews. 

Dr. Babak Sarrafpour an oral and maxillofacial pathologist and dentist at the University of Sydney said they designed the hard and soft tissues in the jaw and input the data they had about jaw movements into the software. They simulated both the back teeth and front teeth chewing and they could assess the stress on the teeth, bone and soft tissue. 

The chewing and biting actions of the jaw deform the thin layer of soft tissue surrounding the teeth that are yet to appear, which forces them outwards said the multidisciplinary team at the University. A number of other hypotheses were researched during the study. There was a number of them surrounding how adult teeth erupted.  During the study, a number of other hypotheses were investigated that were still unsupported by clinical evidence. It might be from the root forming and pushing the tooth towards the oral cavity, or maybe it was the blood pressure in the dental pulp or perhaps it was the periodontal ligaments forming and contracting, pushing against the tooth said Sarrafpour.

Many studies have shown that even with the disconnetion of the root and the ligaments from the tooh, the eruption through the bone would still happen. Because of that, the researchers developed another theory. Sarrfpour said that maybe soft tissue dental follicle around unerupted adult teeth acts as a mechanosensor in respone to biting forces and remodels the surrounding bone in a way that carries the tooth to the mouth. 

The team thinks that this study could result in further preventive treatments that could change the tooth angle before it erupts, rather than depending on orthodontic bands or braces to realign the tooth later in life.

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