Name[ edit ] The name is derived from "Hagenowe", which is a composition of Haag wood and Aue open land by the side of a river. History[ edit ] Relic of the first medieval town-fortification Hanau in around Formerly it was the site of a castle which used the waters of the river Kinzig as a defense. The castle belonged to a noble family, calling themselves "of Hanau" since the 13th century. Starting from this castle a village developed and became a town in
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As described by Hanau, they seem very confusing and unnecessarily complicated. Hanau was not a dentist, but an engineer and a great researcher. He believed articulation of artificial teeth was related to 9 factors. Compensating curve Protrusive incisal guidance Plane of orientation Bucco-lingual inclination of tooth axes Sagittal condylar pathway Sagittal incisal guidance Tooth alignment Relative cusp height He mathematically charted 9 factors and listed the laws of balanced articulation in a series of 44 statements.
Condylar guidance Compensating curve Relative cusp height Incisal guidance and Plane of orientation. He showed how they affected one other with a clever diagram called The Articulation Quint. Orientation occlusal plane. Incisal guidance and Condylar guidance.
Angulation of cusp is more important than the height of cusp. Compensatiing curve enables one to increase the effective height of the cusps without changing the form of the teeth. He stated the laws as follows. Greater the angle of the condylar path, greater is the posterior separation. Greater the angle of overbite, greater is the separation in the anterior and the posterior regions regardless of the angle of the condylar path.
Greater the separation of the posterior teeth, greater or higher must be the compensation curve. Posterior separation beyond the ability of a compensation curve to balance the occlusion requires plane of orientation. Greater the separation of teeth, greater must be the cusps of the posterior teeth. It agrees the need for compensating curve that the occlusal plane should be included only in its correct anatomic position that is in the position that conforms to the patients anatomy , esthetics and function.
It concur with Trapozzano and Boucher that the plane of orientation is a fixed factor and believe that it should not be included at all, because for practical purposes it cannot be used. The laws of articulation are used as an aid in understanding the balancing of occlusion for complete dentures. As explained by Lott, the guiding factor produce the separation of posterior teeth which must be prevented by the controlling factors that occurs in both protrusive and lateral movements.
Condylar guidance is fixed and is recorded from the patient. The balancing condylar guidance includes the working condyle Bennet movement which may or may not affect lateral balance. Compensating curve is important factor for obtaining balance. Monoplane or low cusp teeth must employ the use of this curve. Cusped teeth have inclines necessary for obtaining balance occlusion but are used with a compensating curve. The concept of controlling posterior separation is an important goal for achieving a bilaterally balanced denture occlusion.
Of course we should not dream of a panacea for all prosthetic ills.
This article describes a formula that is introduced to quantify a balanced occlusion within the context of the Hanau quint and discusses the limitations of the formula due to individual variabilities of mandibular movements. You must be signed in to read the rest of this article. Balanced occlusion has been proposed to promote the stability and retention of complete dentures. This dynamic functionality of denture occlusion has been described as the interrelationship of five factors, the so-called Hanau quint, named for researcher Rudolph L. For esthetics, the vertical overlap is increased to display the incisors and mimic the relation of natural dentition. The increased IG, however, may alter the masticatory muscle activities and restrict the functional range of mandibular movements.
Hanau Quint Described as a Formula to Quantify Balanced Occlusion