Clinical Tip #11
Unless your work environment is a pediatric office, or in an oral surgeon’s office, you will not be requested to take many occlusal projections. However, it is important to remember how this task is achieved, because intermittently in your career you will be asked to take occlusal projections. You must be ready for all types of radiography.
Definitions
Bisecting the angle technique: The vertical angulation of the tube head is directed so that the central ray is perpendicular to an imaginary line that bisects the angle formed by the long axis of the tooth and the plane of the film.
Buccolingual dimension: If trying to figure out if the impacted tooth is on the buccal or lingual side of the jaw bone, a right angle projection can be used for diagnosis.
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Foreshortened image: Excessive vertical angulation causes shortening of the tooth image on the film.
Imaginary bisecting line: The line that bisects the angle formed by the long axis of the tooth and the film packet.
Headrest position: Proper position of the patient’s head for radiographic exposure.
Horizontal angulation: The central ray is directed perpendicular to the film in the horizontal plane.
Negative angulation: Used on the mandibular arch; pointing the PID up (negative degrees).
Occlusal film packet: A large intraoral film packet (#4), placed on occlusal surfaces upper/lower teeth to show objects in the 3rd dimension.
Occlusal plane orientation: An imaginary plane formed by occlusal contact of the upper and lower teeth.
Occlusal projection: A film showing mandibular or maxillary and portrays larger object area or a right angle (axial) relationship of the objects.
Overlapped image: A film with superimposed teeth on each other due to excessive horizontal angulation.
Positive Angulation: Used on the maxillary arch, when the PID is pointing downwards (positive
Education: Patients at Legacy Dental Arts often have the option to view the procedures they will be receiving on the overhead screens in each examination room. For many people, being able to see exactly what will happen during a procedure is empowering and informative,
Today, it is possible for orthodontist to take a highly accurate, digital 3D image of the inside of a patient’s mouth. Gone are the days of goop and gagging that are associated with conventional impressions. The iTero Scanner creates almost flawless images of the patient’s teeth and gum tissues the first time so aligners, retainers, appliances and restorations can be more accurate and fit better.
-The bristle tip should have a 45° angle from the gingival sulcus to the long axis of the tooth
her jaw. I explained to patient that an impacted wisdom tooth is a tooth that has failed to grow in the correct position that her tooth was lying sideways and pushing against the other teeth which was causing the pain along her jaw. When the
Consonant smile arc appears when all of the teeth are parallel to each other with the upper lip bordering the top of the tooth and the bottom of the gum. The two front teeth are longer not shorter than the canines. Reverse or non-consonant smile arc occurs when the two front teeth are shorter that the canines. The cause for this condition may be associated with how the upper and lower jaws come together.
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
Title of the article: Detection And Management Of A Complex Canal Configuration In Mesio Buccal Root Of Maxillary First Molar Using Three Dimensional Imaging.
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
Determining the occlusal plane have been a challenge for dentist especially in patients willing to undergo for immediate denture. The importance of occlusal plane is well documented in the professional literature, which should be re-established if complete/partial dentures are to be functionally and esthetically acceptable to the patient. This paper describes a customized occlusal plane analyzer to check for the parallelism of the occlusal plane to Inter-pupillary line anteriorly and Ala-tragus line posteriorly in patients requiring immediate denture.
pre-surgical decision of the optimum location, depth and angulations to place an implant are the most significant issues facing implant dentistry. Dental surgical guides are used to carefully consider these important decisions prior to dental surgery.
Background: the proportion of teeth is related to facial coordination. If the width length ratio is large, the shape of the teeth will look square, and if the ratio is close to 1, then the teeth will look close to the square, more suitable for round faces. Conversely, if the width ratio is too small, then the tooth shape is more slender, more suitable for longer face type crowd. The width of the crown of the front teeth can be extended to determine whether the proportion of teeth is appropriate and whether or not it needs improvement. Crown to root ratio is the most direct index to describe the anatomic morphology of teeth, and has a great reference value for guiding the work of oral clinicians and treating dental diseases. The morphology of
Dentistry has been enhanced since dental radiograph has been used as an important tool to identify and treat diseases that affect the teeth and the structures that support them. Dental radiograph allows the dental professional to detect many conditions that are not possible to see with bare eyes. For examples periodontal disease, dental caries, missing or extra teeth, impacted teeth, cysts and tumor, just to name a few. In many cases these conditions produce no symptoms or clinical signs and if they do, is at a very advanced stage in where a good prognosis is not guarantee. Similarly, the dentist depend on dental radiographs when performing a root canal, examining the status of teeth and bone during growth and development, extraction of
Generally, one of the first things a person notices when meeting someone for the first time is his or her teeth. Teeth are essential in everyday life whether being used to smile for a picture or simply to eat. Because teeth are necessary, many individuals will go to an orthodontist that can help in perfecting teeth. The “perfecting” is often done to improve appearance. There are many types of treatments used in orthodontics, some new and some old. Orthodontic treatments can be split into two main categories: fixed orthodontic appliances and Invisalign. Overall, Fixed orthodontic appliances produce better results than Invisalign.
Forensic Odontology, also called forensic dentistry, is the application of dental science involving the identification of unknown human remains by comparing their set of teeth to a bite mark left on a victim. Forensic odontologist use both physical and biological dental evidence to solve a number of issues, such as identifying human remains that result from crimes and disasters. Forensic Odontology was approved by the United States Court System in the mid 1800’s. The practice of forensic odontology has gained importance in a number of developed countries across the world. Dentistry has a lot to offer when it comes to detecting and solving a crime. Patient’s xrays, photogtaphs and detailed records became useful in the 80’s. Forensic Odontologist
where the film is been displayed with a movie projector onto a large projection screen at the front of