What are the three planes of occlusion?
The planes which serve as references for cranium and face in dental clinical application included the occlusal plane, Frankfort plane, Camper’s plane and hamular-incisive-papilla (HIP) plane. The HIP occlusal plane is a horizontal plane passing through the bilateral hamular notches and the incisive papilla (Dent Surv.
When making complete denture the occlusal plane should be parallel to?
The occlusal plane is parallel to the ala-tragus line with middle point of tragus as posterior reference point on right and left sides. Both sides, the buccinator groove and the middle one-third retromolar pad are coinciding with occlusal plane level.
What is the purpose of plane of orientation?
Correct occlusal plane orientation is a prerequisite in Prosthodontic reconstructive treatment therapy as it helps in achieving esthetics and phonetics anteriorly and forms a milling surface posteriorly where tongue and buccinator muscle position the food bolus during mastication.
Why is it important to establish the level of the plane of occlusion?
The occlusal plane in complete denture should be as harmonious providing normal function of tongue, cheek, muscles, enhancing the denture stability and masticatory efficiency. Mandibular occlusal plane determines the efficiency of masticatory function.
Why is Curve of Spee important?
The long axis of each lower tooth is aligned nearly parallel to their individual arch of closure. The Curve of Spee is, essentially, a series of sloped contact points. It is of importance to orthodontists as it may contribute to an increased overbite. A flat or mild curve of Spee was essential to an ideal occlusion.
Which plane is parallel to occlusal plane?
superior ala-tragus line
The superior ala-tragus line has the smallest angle value and is considered to be the most parallel to the occlusal plane. 18 The results of this study show that the mean angle of the ala-tragus line in normal individuals is 2.169° ± 2.557° located on the inferior ala-tragus line.
What is an occlusal plane?
One of the important factors that help us in the establishment of ideal occlusion is the orientation of the occlusal plane. Occlusal plane is the average plane established by the incisal and occlusal surfaces of the teeth; it is not a plane but represents the planar mean of the curvature of the surfaces [3].
What is occlusal rim?
Definition : occlusion rims are occluding surfaces constructed on record bases or permanent denture bases to be used in recording jaw relations and for arranging teeth. the position should be in the anticipated position of the artificial teeth. it must be securely attached to the base.
Why is orientation of the occlusal plane important?
Purpose: Orientation of the occlusal plane is important in a number of clinical situations. Using the reported soft and hard tissue landmarks is difficult and requires experience, as the landmarks are located on the face or by use of a cephalometric radiograph.
How is the occlusal plane oriented in a denture?
Occlusal plane orientation is an important factor in the construction of a complete denture. Occlusal plane could be oriented using landmarks in the mandibular arch as well as in the maxillary arch.
How does improper use of landmarks affect the occlusal plane?
Improper use of these landmarks may compromise the functional and esthetic result of prosthetic restorations. This study evaluated the reliability of the hamular notch/incisive papilla plane (HIP) in establishing the occlusal plane.
Where does the occlusal plane terminate in the retromolar pad?
Reliability of the intra-oral method which orientates the occlusal plane to terminate at the upper level of the retromolar pad was studied. Thirty individuals all with natural teeth and 34 complete denture wearers participated in the study. Stone casts were mounted in the S.A.M. 2 articulator by a quick mount face bow transfer.