Reducing Interferences
Posted on 03/29/2012
Interferences are most common on mandibular anterior teeth. Specifically, lingually inclined pre-molars or overlapping incisors both cause interference for the major connector.
If a lingual bar design has been chosen, it is recommended to reduce pre-molars that are lingually inclined so as to avoid a dislodgement issue. If the pre-molars are not reduced, the lingual bar will need to be placed closer towards the floor of the mouth which can irritate the tissue.
If a lingual plate has been chosen, it will be important to correct overlapping incisors to avoid undercuts that would inhibit easy insertion and removal of the prosthesis. Additionally, overlapping incisors can lead to food entrapment between the tooth and the lingual plate. Correcting the teeth before fabricating the framework would give the best functional result.
*Portions of this post were adapted from the book: Atlas of Removable Partial denture Design by Dr. Russell J. Stratton and Dr. Frank J. Wiebelt published by Quintessence Publishing Co., Inc. in 1988.
If a lingual bar design has been chosen, it is recommended to reduce pre-molars that are lingually inclined so as to avoid a dislodgement issue. If the pre-molars are not reduced, the lingual bar will need to be placed closer towards the floor of the mouth which can irritate the tissue.
If a lingual plate has been chosen, it will be important to correct overlapping incisors to avoid undercuts that would inhibit easy insertion and removal of the prosthesis. Additionally, overlapping incisors can lead to food entrapment between the tooth and the lingual plate. Correcting the teeth before fabricating the framework would give the best functional result.
*Portions of this post were adapted from the book: Atlas of Removable Partial denture Design by Dr. Russell J. Stratton and Dr. Frank J. Wiebelt published by Quintessence Publishing Co., Inc. in 1988.
