What is the ideal curve of Spee?
The Curve of Spee is basically a part of a circle (8-inch diameter) which has its circumference as the anterior ramus of mandible. Ideally, it is aligned so that a continuation of this arc would extend through the condyles. The curvature of this arc would relate, on average, to part of a circle with a 4-inch radius.
How do you flatten a curved Spee?
Correction of exaggerated curve of Spee can be achieved by the following tooth movements:
- Extrusion of molars.
- Intrusion of incisors.
- Combination of both movements.
What is deep curve of Spee?
The depth of curve of Spee was measured as the perpendicular distance between the deepest cusp tip and a flat plane that was laid on the top of the mandibular dental cast, touching the incisal edges of the central incisors and the distal cusp tips of the most posterior teeth in the lower arch [Figure 1].
What is the purpose of leveling the curve of Spee?
An excessive curve of Spee (COS) is a common orthodontic finding, particularly in patients with a deep overbite (OB). The purpose of this analysis was to evaluate COS leveling and OB correction in patients treated with IncognitoTM, a customized lingual appliance system.
Who gave curve of Spee?
Ferdinand Graf von Spee
The curve of Spee, as classically described by Ferdinand Graf von Spee (Fig 1), exists as a concave curve in the mandibular dental arcade, with an average radius of approximately 100 mm [26]. A corresponding convex curve (compensating curve) exists in the maxillary dental arcade.
How do you fix a deep curve of Spee?
The leveling of a deep curve of Spee can happen simultaneously with the alignment phase through a method called Early Vertical Correction (EVC). This technique uses two cantilevers affixed to the initial flexible archwire. This paper describes the force system produced by EVC and how to control its side effects.
Is curve of Spee concave or convex?
The curve of Spee, as classically described by Ferdinand Graf von Spee (Fig 1), exists as a concave curve in the mandibular dental arcade, with an average radius of approximately 100 mm [26]. A corresponding convex curve (compensating curve) exists in the maxillary dental arcade.
What is the function of Embrasure?
In dentistry, embrasures are V-shaped valleys between adjacent teeth. They provide a spill way for food to escape during chewing which essentially aids in the self-cleansing process.
What is monoplane occlusion?
Monoplane occlusion involves having non-anatomic denture teeth with a 0˚ incisal guidance angle, arranged on a flat occlusal plane. As a consequence, when patients with monoplane occlusion occlude anteriorly, an interocclusal gap appears posteriorly.
How is the curve of Spee different from Wilson’s curve?
The Curve of Spee is distinct from the Curve of Wilson, which is the upward (U-shaped) curvature of the maxillary and mandibular occlusal planes in the coronal plane. The Curve of Spee is basically a part of a circle (8-inch diameter) which has its circumference as the anterior ramus of mandible.
Where does the curve of Spee begin and end?
In anatomy, the Curve of Spee (called also von Spee’s curve or Spee’s curvature) is defined as the curvature of the mandibular occlusal plane beginning at the canine and following the buccal cusps of the posterior teeth, continuing to the terminal molar.
What happens if you have a deep curve of Spee?
A deep curve of Spee may make it almost impossible to achieve a Class I canine relationship, though it may also result in occlusal interferences that will manifest during mandibular function.
What does curve of Spee mean in orthodontics?
Curve of Spee – Today Today, in orthodontics, the curve of Spee commonly refers to the arc of a curved plane that is tangent to the incisal edges and the buccal cusp tips of the mandibular dentition viewed in the sagittal plane.[5–8]