Archive for December, 2011

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

In periodontally compromised patients, is splinting the entire dental arch with a onepiece, “round-house” fixed bridge the treatment of choice ?

In periodontally compromised patients, is splinting the entire dental arch with a onepiece, “round-house” fixed bridge the treatment of choice ? Splinting an entire dental arch with a round-house fixed bridge is far from the treatment of choice because it is fraught with potential problems: 1. All tooth preparations must be parallel to each other. […]

December 21, 2011 | 0 Comments More

How does one determine the number of abutments to be used?

How does one determine the number of abutments to be used? There is no rigid rule. Determining factors include: 1. The greater the number of pontics, the greater the increase in loading forces on the abutments 2. The position of the pontics affects the loading forces of the abutments: the more posterior the pontics, the […]

December 21, 2011 | 0 Comments More

What is the best marginal tooth preparation?

What is the best marginal tooth preparation? There is no ideal marginal tooth preparation. The selection of the marginal design depends on many factors, including: 1. The material used in construction of the full crown: All-ceramic restoration—shoulder or deep chamfer Metal-ceramic with porcelain extended to marginal edge—shoulder or  deep chamfer Metal-ceramic with metal collars—shoulder with […]

December 21, 2011 | 0 Comments More

What is the definition of “fit” for a Full crown restoration? What is the clinical acceptance of the fit of a full-crown restoration ?

What is the definition of “fit” for a Full crown restoration? What is the clinical acceptance of the fit of a full-crown restoration ? The fit of a full-ciown restoration is normally measured in relationship to two reference areas: (1) the occlusal’seat and (2) the marginal seal. The two areas are interrelated and affect each […]

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

What’s worse than…

What’s worse than… What’s worse than having your doctor tell you that you have VD? Having your dentist tell you. Source : Internet

December 20, 2011 | 0 Comments More

The woman who goes to the dentist

The woman who goes to the dentist Then there’s the woman who goes to the dentist. As he leans over to begin working on her, she grabs his balls. The dentist says, „Madam, I believe you’ve got a hold of my privates.” The woman replies, „Yes. We’re going to be careful not to hurt each […]

December 20, 2011 | 0 Comments More

Types of tooth movement, force magnitude and duration

Types of tooth movement, force magnitude and duration Although it was previously thought that tipping of a single-rooted tooth (Fig. 1) occurred about a point almost midway along the root, rotation now appears to take place near the apical third within an elliptically shaped area. Half of the periodontal ligament is stressed, with maximum pressure […]

December 20, 2011 | 0 Comments More

Orthodontic tooth movement

Orthodontic tooth movement The biological response to a sustained force is determined mainly by the force magnitude and duration, which generate zones of pressure and tension within the periodontal ligament, their extent and location depending on the intended movement. Pressure zones The cellular response relates to whether a light or heavy force is applied. With […]

December 20, 2011 | 0 Comments More
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