Endodontics, in dentistry, diagnosis, treatment, and prevention of diseases of the dental pulp and the surrounding tissues. (The dental pulp is soft tissue in the centre of the tooth; it contains the nerve, blood and lymphatic vessels, and connective tissue.Learn how scientists may have developed a less painful root canal procedure
The practice of endodontics is concerned primarily with the removal of diseased dental pulp and its replacement with filling material, an operation known as root canal therapy. After the pulp is removed, the tooth continues to be nourished by connecting blood vessels in the jaw. The tooth is then considered to be dead, although the fibres that hold the teeth in the jawbone are alive.
Operations on the pulp are performed with the aid of local anesthesia. Preservation of the natural tooth in this manner serves both appearance and utility; a natural tooth implanted in the jaw maintains the integrity of the dental arch and can withstand about 10 times more pressure than can artificial teeth.
oral and maxillofacial surgery, dental specialty that deals with the diagnosis and surgical treatment of the diseases, injuries, and defects of the human mouth, jaw, and associated structures. The most common oral surgery procedure is tooth extraction. Other dental problems that require the skill of an oral surgeon include treatment of cysts (liquid- or semisolid-filled sacs), tumours, lesions, and infections of the mouth and jaw. More complex problems that are dealt with by the oral surgeon include jaw and facial injuries, cleft palate, cleft lip, and placement of implants. Both dentists and physicians refer patients to an oral surgeon for treatment of such defects. Oral surgery has special problems because (1) the lips and the cheeks limit access to jaw and palate; (2) the tongue and the lower jaw move; (3) the oral cavity opens into the pharynx (the passageway for air and food); and (4) the oral region is continually being flooded with saliva and is inhabited by the largest number and greatest variety of microorganisms found in the human body.
orthodontics, division of dentistry dealing with the prevention and correction of irregularities of the teeth—generally entailing the straightening of crooked teeth or the correcting of a poor bite, or malocclusion (physiologically unacceptable contact of opposing dentition, which may be caused by imperfect development, loss of teeth, or abnormal growth of jaws). Of significance to the orthodontist is the sequence of eruption (emergence of the tooth from its developmental crypt into the oral cavity), because such knowledge helps to determine the position of the teeth. Human bone responds best to tooth movement before age 18, and consequently orthodontic work is usually more beneficial to a child than to an adult.
The practice of orthodontics has existed since early antiquity, but the more elaborate methods of treatment came about in the 20th century. Orthodontics quickly became a specialized branch of dentistry with its own professional organization. Training in orthodontics usually consists of a two-year postgraduate course.
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