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PubMedDate not supplied

[Influence of impressions' border formation on retention of lower complete dentures].

Examinations of the retention of lower individual trays without formation of borders and with borders shaped of wax for impressions have been carried out in 32 patients with toothless mandible. The retention of impressions and lower complete dentures has also been examined. The examinations have been demonstrated that formation of lower individual impression trays' borders increases the retention of lower complete denture. The formation of borders in the anterior region of sublingual fovea influences the retention of lower complete dentures most. Simultaneous formation of borders in the anterior regions of sublingual salcus and oral cavity vestibule ensures the greatest retention of the dentures. The retention of lower complete dentures shows positive correlations with the retentions of impression trays and impressions and that is why the estimation of the impression's retention of the toothless mandible should be done each time to determine the recommendations for the end of the procedure or performance of suitable corrections. Carrying lower complete dentures for 1-4 weeks doesn't influence the retention force of these dentures.

Dental Impression Technique↗
PubMed1997

Tongue control of lower complete dentures: a clinical hint.

Lack of tongue control may be one reason why patients experience unstable complete lower dentures. The author suggests a method to help patients acquire that control and considers other possible reasons for instability of lower dentures.

Denture Retention↗
PubMed1990

[An electromyographic observation of the extensional labiobuccal flange lower complete denture].

The electromyogram of the buccinator and the myoid muscles in 26 lower full denture patients with severe atrophic alveoli were measured separately in three groups: group one, the conventional dentures: group two, the extension flange dentures in preliminary stage after the denture insertion and group three, the extensional flange denture in forward stage. The main results showed that (1) the functional force, except on mouth opening, exerted by the buccinator muscles increased significantly in group two and three. (2) the functional force exerted by the mylohyoid muscles on mouth opening decreased significantly in group two and increased in group three which was similar to group one. There were no significant difference between these three groups on swallowing. (3) the functional force except on mouth opening, exerted by the buccinator and mylohyoid muscles between these three groups was no significant difference. These observations indicated that there was no significant interference in the physiological activities of the buccinator and the mylohyoid muscles with the extensional flange dentures. In addition, the extensional buccal flange may enhance the denture retention.

Aged↗