The positioning of teeth in the dental arch is dependent upon an equilibrium that exists between soft tissues exteriorly and interiorly (dog article). It is the imbalance of the forces within this equilibrium that results in the movement of a tooth. Although extensively researched, there is still significant controversy as to the ‘ideal’ pressure that should be applied to a tooth to result in maximum efficiency in movement. A number of theories of the mechanics of tooth movement exist, revolving around the effect on the periodontal ligament and corresponding effect of alveolar bone remodeling. There are two main theories relating to orthodontic tooth movement, which are crucial to understand the assessment of the ‘ideal’ force for tooth movement. The bone-bending theory, otherwise referred to as the biological electric theory, proposes that forces applied to teeth stimulate electron release, which are then involved in remodeling alveolar bone. Possibly more accepted, however, is the pressure-tension theory. This theory suggests that forces applied to a tooth result in compression of the periodontal ligament on one side of the root, and a tension force applied to the other. Compression for an extended time, exceeding approximately four hours, results in a release of chemical mediators, including prostaglandins and cytokines, in addition to decreased oxygen associated with reduced blood flow. These mediators act to directly, and indirectly through secondary messengers
Having succeeded in the pursuit of my DMD as one of the top students in my class both clinically and didactically, my immediate goal was to broaden my horizons in understanding dental medicine. This understanding encompassed the multifaceted and dynamic collaboration of specialties- both of which share the goal of comprehending biomechanics concerning maxillofacial complexion and the proper treatment of various malfunctions.
My ambition to study for a degree in Dental Hygiene and Dental Therapy has developed out of several years’ experience of working as a dental nurse in support of professional dental technicians and a growing interest in the science involved in dentistry. I am very much aware of the importance of the hygienist’s role in maintaining the patient’s dental health, and indeed ultimately helping to secure general health through careful attention to oral conditions. My work as a nurse has made me realise the importance of a full understanding of the physiology of the mouth and gums and of the whole body. I have been struck by how common periodontal diseases are in patients who come for dental treatment and have an immense faith in the value of preventive
Argenis FerrebusMr. RottenbergCOMP 200031 January 2018Writing ExerciseLocating a Community ArtifactArtifact: Air-Driven High-Speed Dental HandpieceDescription and AnalysisAssumptions/Existing KnowledgeI am familiar the air-driven dental handpiece to some extent. I have seen it every time I have gone to the dental office. I have had this artifact used on me but I’ve never used it myself. Every time an air-driven handpiece is used on me, I feel a very uncomfortable sensation in my tooth. This artifact reminds me of a drill and is also known as a dental drill. Dentist uses this “drill” in order to remove cavities, tooth decay, and plaques. I personally believe the people who invented the air-driven dental handpiece created it in order to remove
Reversal of the normal relationship of upper teeth, which only interfere normal function to a minor degree (less than 2mm).
The United States always has a way of blaming Chicano people for the rising unemployment rates, when in reality the United States is the one who wanted Chicano people to work. After World War II the United States needed more manual labor which then provoked the emergence of countless Mexicans into the U.S.. They were known as Braceros, which were Mexican laborers that were allowed into the United States for a limited period of time as a seasonal agricultural worker. The Bracero movement was well related to the California Gold Rush because numerous Mexicans headed North across the American border because they thought they would gain mass fortunes
Pimduen rungsiyakull et al (2011)19 studied the various occlusal designs on the strain development and its effect on simulated bone with implants supporting single crowns as models. Strain gauges were attached to the cervical area of each model. Occlusal design, magnitude and load location were tested to analyse the maximum axial strains (με) of 4 occlusal designs: 4- and 6-mm occlusal table with 30-degree cusp inclination dimensions and 4- and 6-mm occlusal table with a 10-degree cusp inclination dimensions and concluded that a reduction in occlusal table dimension and cuspal inclination effectively reduced the experimental bone strain on implants that support single crowns. Occlusal table dimensions appeared to have a relatively major role
The motion of the mandible during mastication is a three-dimensional, complex motion, which has been described as having the shape of a teardrop or a pear (8) (Insert Figure_5.jpg). When the motion is traced in the frontal plane during a single chewing stroke, this analogy becomes clear. During the opening phase, the mandible is depressed vertically, where the lower incisor is nearly perpendicular to the dental occlusal plane (21,24) with inter-incisal gapes reaching 17–20 mm. On the closing phase, the incisor region typically latero deviates about 5 mm from the midline, and then moves medially as the food bolus engaged (26-28). The mandibular condyles’ lateral translation is about 0.4–0.6 mm during chewing (27,28). As the mandible continues
Nield-Gehrig, J. S. (2008b) Adaptation and angulation (6th edition) Fundamentals of periodontal instrumentation and advanced root instrumentation (pp. 169-180) New York, NY. Wolters Kluwer/ Lippincott Williams & Wilkins
Neuromuscular dentists are not only concerned with the health of the teeth and gums, but with entire system that allows us to chew, swallow and speak. The temporomandibular joint (or TMJ) is the system of joints and muscles that allows us to open and close our mouths. Misalignment of this system can lead to many painful symptoms.
In the last decade, many interesting studies were published in the literature about the use of surgery to speed up biological tooth movement in the context of orthodontics. These procedures may involve Distraction of the periodontal ligament (PDL), Distraction of the dento-alveolus, Alveolar decortication, and Corticision. Some of these procedures add bioabsorbable grafts to increase the bone volume.
Enamel;’ the hardest tissue in the body’ has a very important role in chewing, protecting dentin and pulp, phonetics, and esthetics.
Dentin is the bone-like connective tissue of the middle layer of a tooth that is found to play an important role in the structure and integrity of teeth. Dentinogenesis is the process of forming dentin during tooth development. The cells responsible for this process are called odontoblast. These odontoblast cells are differentiated ectomesenchymal cells at the basal membrane of the inner enamel epithelium. These cells grow and secrete a collagenous matrix called the predentin that is later mineralised with hydroxyapatite crystals. Many proteins interact with the collagenous matrix in the mineralization process. As the odontoblasts continue to grow longer and deeper into the pulp cavity,
Teeth are very important to a person for many different reasons. Teeth not only have a cosmetic purpose but they have a functional person as well. It is important that a person’s teeth erupt fully because teeth are needed for anything from eating to the proper pronunciation of words. But if there is a severe trauma to the tooth, like it getting chipped or knocked out playing a sport, falling, or domestic or child abuse (Smith), all of these injuries can stop the development of the root. Root of teeth do not fully develop until two to three years after the tooth has erupted. If the root is allowed to develop completely it comes to a close known as the apex of the tooth. The apex of the tooth normally has an opening that is about one to three
Having a youthful smile is a definitely an eye-catching quality for many people. In order to put your best smile forward, consider these steps.
The presence of teeth is very importrant to the development of alveolar bone. When teeth are lost, remodeling and resorption of the surrounding alveolar bone will occur. Also, it will lead to atrophic edentulous ridges. In addition,when a tooth is lost,the external width of the bone volume will decrease by 25% and 4mm decrease in its height after the first year of tooth loss. Bone loss rate is