DETERMINANTES DE LA MORFOLOGÍA OCLUSAL: Altura cuspidea y profundidad de la fosa

Summary

This video explains the key determinants of occlusal morphology, focusing on factors such as cusp height and fossa depth in dental rehabilitation. It explores the relationship between these factors and jaw movement, highlighting how anatomical features like the eminence angle, Wilson's curve, and overbite conditions affect the positioning and function of teeth. The video discusses how variations in mandibular movements, such as lateralization, influence cusp heights and fossa depths, with detailed analysis of occlusal planes, mandibular divergence, and the impact of overbite on molar alignment and dental occlusion. A comprehensive overview of dental occlusion is provided for optimal dental design.

Takeaways

• 😀 Cusp height and fossa depth are key determinants of occlusal morphology in dental rehabilitation.
• 😀 The anatomy of occlusion interacts harmoniously with the structures controlling jaw movement patterns.
• 😀 When posterior teeth are closer together, lower cusp height and shallower fossae are required.
• 😀 When there is significant separation between opposing teeth, higher cusp height and deeper fossae are needed.
• 😀 The angle of the eminence influences cusp height and fossa depth; greater angle leads to higher cusp and deeper fossa.
• 😀 In lateral movements, the mandibular condyle's position determines whether cusp height will be higher or lower.
• 😀 The more superior the working condyle's direction, the lower the cusp height and fossa depth.
• 😀 The Speed Curve (anteroposterior curve) affects cusp height and fossa depth, with greater curvature leading to lower cusp height and shallower fossae.
• 😀 The Wilson Curve (lateral curve of molars and premolars) impacts occlusion, with a greater curve leading to lower cusp height and shallower fossae.
• 😀 Overbite and overjet are critical factors; larger overbite leads to greater space between molars and higher cusp height and deeper fossae.
• 😀 A deep overbite increases space between upper and lower molars during jaw movement, while a shallow overbite reduces space, lowering cusp height and fossa depth.

Q & A

What factors influence the morphology of dental pieces in rehabilitation?

The morphology of dental pieces in rehabilitation is influenced by occlusal anatomy, cusp height, and fossa depth, which are determined by the patterns of jaw movement during functional activities like chewing.

How does occlusal anatomy interact with jaw movement?

In healthy individuals, occlusal anatomy works harmoniously with the structures that control jaw movement, ensuring proper interaction between the teeth and jaw during function.

What happens when there is more separation between the upper and lower posterior teeth during jaw movement?

If there is more separation between the upper and lower posterior teeth, higher cusp heights and deeper fossas are required to accommodate this separation during movement.

How does the angle of eminence affect cusp height and fossa depth?

A greater angle of eminence, which is influenced by the height and depth of the fossa, leads to increased mandibular descent, allowing for higher cusp heights and deeper fossas.

What effect does superior condyle movement have on cusp height and fossa depth?

Superior condyle movement results in smaller cusp heights and shallower fossas, as the jaw moves in a way that reduces the space between the upper and lower molars.

How does inferior condyle movement affect cusp height and fossa depth?

Inferior condyle movement allows for taller cusp heights and deeper fossas because it creates more space between the upper and lower molars during movement.

What is the curve of Spee and how does it impact cusp height?

The curve of Spee is an anteroposterior curve that extends from the tip of the mandibular canine through the posterior molars. A greater curve reduces the space between upper and lower molars, leading to smaller cusp heights and shallower fossas.

What is the curve of Wilson and how does it affect cusp height and fossa depth?

The curve of Wilson is a curve that passes through the vestibular and lingual cusps of the molars and premolars. A higher curve in the upper jaw leads to more superior condyle movement, resulting in smaller cusp heights and shallower fossas.

How does divergence in the occlusal plane influence cusp height and fossa depth?

Greater divergence between the jaws at the occlusal plane leads to higher cusp heights and deeper fossas due to more mandibular movement, whereas less divergence results in lower cusp heights and shallower fossas.

What effect does a minimal horizontal overbite have on cusp height and fossa depth?

A minimal horizontal overbite increases the space between the upper and lower molars, resulting in taller cusps and deeper fossas during jaw movement.

What is the effect of a deep vertical overbite on cusp height and fossa depth?

A deep vertical overbite creates more space between the upper and lower molars, leading to taller cusps and deeper fossas during jaw movement.

How does a shallow vertical overbite affect cusp height and fossa depth?

A shallow vertical overbite reduces the space between the upper and lower molars, leading to shorter cusp heights and shallower fossas.