PubMed · 6371549
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C Lekkas. 1984-03-24. [Trouble with dentures].. https://pubmed.ncbi.nlm.nih.gov/6371549/
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It is necessary to recognize the retentive capabilities of magnetic systems to assess their clinical performance. This study determined the retentive characteristics of one open-field and two closed-field commercial dental magnetic systems. The effect of speed of separation and the space between the magnet and its keeper on the retention force were evaluated. The magnets and their respective keepers, embedded in acrylic resin blocks, were tested with fast and slow speeds of separation. The maximum retention values of the magnetic systems were tested with slow speed of separation. The fast speed of separation was designed to reflect mandibular movement. Various spaces were developed between the magnets and their respective keepers, and magnetic systems were tested only in slow speed of separation. The fast speed of separation dramatically lowered the retention force of each magnetic system. As the space increased between the magnet and keeper, the retention values diminished rapidly. While closed-field systems demonstrated higher retentive forces than the open-field system, the open-field system was less affected by the various spaces.
Mucosal inserts increase the retention of any well-made denture but should not be attempted as a substitute for good prosthetic technique. They are especially useful with the trauma or cancer patient where functional anatomy has been altered. Final results of the patient's removable prosthesis will depend on mechanical, anatomical and psychological factors. The mucosal insert denture can satisfy the expectations of many of these patients, if the patients are informed and managed properly.
Complete-denture therapy involves a complex interplay between biologic demands and technical limitations. Success with complete-denture therapy is reportedly high. Dissatisfied denture patients, although few, do exist. This paper reviews some of the common faults reported with complete dentures.