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In 1909, Charles A. Clark described a radiographic procedure for localizing impacted teeth to determining their relative antero-posterior position. [1] If the two teeth (or, by extension, any two objects, such as a tooth and a foreign object) are located in front of one another relative to the x-ray beam, they will appear superimposed on one another on a dental radiograph, but it will be ...
The bisecting angle technique is an older method for periapical radiography. It can be a useful alternative technique when the ideal receptor placement using the paralleling technique cannot be achieved, for reasons such as anatomical obstacles e.g. tori, shallow palate, shallow floor of mouth, or narrow arch width. [13]
Bennet Angle : the angle of medial movement on NWS condyle relative to the vertical plane Condylar Angle : the angle of downwards movement of the NWS condyle relative to the horizontal plane The working side (WS) condyle (also called the rotating condyle) undergoes an immediate, non-progressive lateral shift.
In this scheme, the Lott concept is refined by recording 1) the condylar angle, the simplest method being positional records, 2) and the incisal angle, by incorporating aesthetic and phonetic requirements. Then, the most important tool to achieve bilateral balanced occlusion is the use of compensating curves.
This photo shows teeth #2-5 (Universal numbering system).Tooth #3, the upper right first molar, has an MO (mesial-occlusal) gold inlay.This molar is both posterior, as well as distal, to the premolars in front of it.
The offset lies at an angle to the mesio-distal axis of the tooth, and causes the mesial portion of the central groove to be located further buccally than the distal portion. This buccolingual shift correlates with a relative difference in size between the mesial and distal cusps on these teeth - the mesiolingual cusp is larger than the ...
Edward Angle practiced strictly without extraction of teeth to achieve harmonious occlusion. Tweed believed that extracting teeth lead to a more harmonious profile than what Angle achieved in his practice and was the best technique to prevent orthodontic relapse. In 1940, Tweed took 100 patients and treated them without extractions.
The acid-etched resin bonded splint is a relatively new alternative method to protect teeth from further injury by more stabilising them in a favourable occlusal relationship. The main goal in this technique is to replace the missing teeth and provided maximum conservation for the structure of remaining teeth.