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At least 19 recordsLinked to original sources
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↗
PubMed2000

[Study of the relationship of the mandibular alveolar tuberculum to the occlusal plane at complete lower dentures].

The distance between occlusal plane and alveolar crest has an influence on the stability of the lower denture. From the relationship of the occlusal plane to the tuberculum alveolare mandibulae we can conclude on the distance between the occlusal surface of the denture's molars and the alveolar crest. The relationship of the occlusal plane to the tuberculum alveolare mandibulae was examined in 688 patients with complete lower and upper dentures. Results have shown, that in 30.25% the occlusal plane of the lower dentures was at higher level, than the highest point of the tuberculum alveolare mandibulae, in 41.3% it was at the level of the highest point of the tuberculum alveolare mandibulae and in 28.45% it crossed the tuberculum below its highest point. From our results the conclusion can be drawn, that in most of the cases no attention to the tuberculum line, has been paid the interalveolar distance and the occlusal plane of the natural teeth at the set-up of the molars, so this has a negative effect in 69.5% of the examined cases on the stability of the lower complete dentures.

Dental Occlusion↗
PubMed1998

The simulation and calculation of the fatigue of the lower complete denture in function by means of the finite element analysis.

This paper presents a finite element analysis, by which the stress distribution during function of a lower jaw acrylic-resin complete denture can be shown. The geometry of a prosthesis has been approximated by measuring, its elementary dimensions, as well as the dimensions of the characteristic cross-sections, on an already completed denture. Based upon these dimensions a mesh, (a three-dimensional network diagram) of finite elements was made. The results obtained are presented both graphically and numerically. The equivalent fatigue stresses, according to von Mises' energetic theory of firmness, expressed in MPa (or in N/mm2), are also shown. The results obtained enable us to gain an insight into lower complete denture fatigue, and could also be used when optimizing the shape of a denture. Furthermore, they could indicate possible causes of the fatigue fractures of a denture, particularly in the area between the left and the right canines.

Acrylic Resins↗
PubMed2002

[Correlation between the weight and usefulness of complete lower denture].

The importance of gravity has been known for a long time in prosthetic dentistry. However, few researchers have focused on the measurement of the weight of complete lower dentures or on the possibility of increasing that weight and its effect on stability. Some authors recommend hidden weight increase using a horseshoe-shaped alloy covered by the artificial gum in order to increase the weight of complete lower dentures; others recommend the use of metal molars, heavy acrylic artificial gum, and a baseplate partially or fully made of metal for the same purpose. The authors of the present article have measured 167 complete lower dentures using an assay balance. They compared three sets of complete lower dentures of 24 patients, one of the three being of increased weight in each case. The examination by x2 statistics (four-domain contingency test) of the relationship between the weight and usefulness of complete lower dentures showed that an overwhelming majority of patients preferred the weight-increased dentures.

Denture Design↗