Category: Orthodontics

Andrews’ keys of Normal permanent occlusion

Andrews’ keys of Normal permanent occlusion Static occlusal relations (Andrews’ six keys) : • Molar relationship ( Fig. ). Distal surface of the distal marginal ridge of 6 contacts and occludes with the mesial surface of the mesial marginal ridge of 7; the mesiobuccal cusp of 6 lies in the _groove between the mesial and […]

March 9, 2012 | 0 Comments More

Ugly duckling stage

Ugly duckling stage It is an ugly arrangement of anterior teeth , which is merely a temporary phase during the process of normal development . Here the developing upper permanent canines, causes mesial displacement of roots of permanent incisors around the age of 8 to 9 years. This causes a distal divergence of crowns of […]

March 9, 2012 | 0 Comments More

Definition , Classification and uses of Bite Plane

Definition , Classification and uses of Bite Plane It is a shelf of acrylic added to the baseplate to clear the occlusion or to reduce the over bite if it interfere with tooth movement . TYPES OF BITE PLANES Bite planes are classified according to their position as Upper anterior Lower anterior Upper posterior Lower […]

March 9, 2012 | 0 Comments More

Retention component of removable orthodontic appliance

Retention component of removable orthodontic appliance The retention component maintains the appliance in the mouth, and it is generally advisable to have the clasps located to optimise retention. The following components are commonly used. Adams’ clasp Fixation is achieved by the arrowheads, which engage about 1 mm of the mesial and distal undercuts on the […]

December 22, 2011 | 0 Comments More

Active components of removable orthodontic appliance

Active components of removable orthodontic appliance Springs The force (F) delivered by a spring is expressed by the formula F adr4//3, where d is the deflection of the spring, r is the radius of the wire and / is the length of the spring. Radius and wire length, therefore, have most effect on wire stiffness. […]

December 22, 2011 | 0 Comments More

Indications for removable appliance therapy

Indications for removable appliance therapy The role of removable appliances in the contemporary management of malocclusion is much more restrictive than it has been in the past principally because of the more widespread use of fixed appliances and a greater awareness of the limitations of removable appliances. Removable appliances are best used in the following […]

December 22, 2011 | 0 Comments More

Important points that should be remembered in relation to appliance design

Designing a removable appliance Some important points should be remembered in relation to appliance design: • always design the appliance with the patient in the dental chair; this helps to avoid design errors • keep the design as simple as possible: aim to carry out a few tooth movements with each appliance • use the […]

December 22, 2011 | 0 Comments More

Signs ( orthodontic ) of macroglossia

Signs ( orthodontic ) of macroglossia Generalized spacing. Imprint of teeth on the lateral border of tongue. Increased salivation.

December 22, 2011 | 0 Comments More

Landmarking of Cephalograms

Landmarking of Cephalograms     Orthodontists have defined a certain number of characteristic points, or  landmarks, on the x-ray images of the human skull which are used to study  growth or as an diagnostic aid.  This work presents the first step towards the automatic extraction of these points.  They are defined with respect to  particular lines, […]

December 21, 2011 | 0 Comments More

Undesirable sequelae of orthodontic force

Undesirable sequelae of orthodontic force Pulpal damage A mild pulpitis following initial force application is common, but has no effect long term. Where the apical blood vessels are severed by the use of heavy continuous force or by injudicious root movement through the alveolar plate, pulp death is likely, although this is usually associated with […]

December 20, 2011 | 0 Comments More
Note: dentistbd.com does not guarantee the opportunity, legality, integrity, or quality of the Information.
WARNING: Any unauthorised use or reproduction of  dentistbd.com content for commercial or any purposes is strictly prohibited and constitutes copyright infringement liable to legal action.
Skip to toolbar