·7 Predicting the Outcome of Selective Grinding • RULE OF THIRDS • It deals with the buccolingual arch discrepancy when the condyles are in the musculoskeletally stable position With the condyles in centric relation the mandible is closed to tooth contact If the initial contact of the lower centric cusp is on the third closest to the central fossa of the opposing
·maxillary teeth Proper intercuspation in these instances can be accomplished by periodontal prosthesis Patients in whom the mandible is dis placed laterally can be helped by selective grinding if the amount of lateral dis placement is small If the lateral displace ment is large selective grinding will re
The examples of irreversible occlusal therapy include selective grinding fixed prosthetic procedures and orthodontic therapy In the following sections we shall discuss in detail the irreversible occlusal therapy selective occlusal grinding Mandibular incisors should be ground only when the limit of grinding of the maxillary teeth has
Download scientific diagram Preventive treatment selective grinding A Marking premature contacts with the help of articulating paper B Premature contact is shown as dark mark on 63
·2 Teeth are altered by selective grinding to make simultaneous cusp tip to cusp tip contact on both sides of the arch when the jaws are in left or a right lateral position balanced occlusion in a static eccentric position exists When the mandible is in a straight protruded relation with the maxilla and the posterior teeth are altered to make cusp contacts at the same time to
·Figure 14 Centric occlusion is refined as described above until the pin touches the incisal guide table and the posterior teeth touch uniformly Figures 15 and 16 This illustrates the distribution of the markings which occur on the teeth after centric occlusion has been refined through selective grinding procedures Note that the marks are
Selective grinding This is the reshaping of one or more teeth to reduce or alter specific undesirable occlusal contacts or tooth inclinations It may be carried out to reduce plunger cusps over erupted posterior teeth with unopposed contacts wedging or locking effects of restorations or extruded teeth each of which may prevent freedom of
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