The effect of relining on the accuracy and stability of maxillary complete dentures—An in vitro and in vivo study

Barco, Martin T.; Moore, B. Keith; Swartz, Marjorie L.; Boone, Malcolm E.; Dykema, Roland W.; Phillips, Ralph W.

doi:10.1016/0022-3913(79)90324-x

Cited by 30 publications

(24 citation statements)

References 7 publications

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“…Other aspects should also be considered: 1- the polymerization shrinkage of the resin is compensated, in part, by the thermal expansion of the resin itself during processing [15]; and 2- the restrictive effect of investing plaster on keeping the teeth in position when the resin induces polymerization and cooling stresses [16]. During or after the procedures, it was also possible that a large amount of internal stresses were relieved before definitive flask closure.…”

Section: Discussionmentioning

confidence: 99%

Effect of Flask Closure Method and Post-Pressing Time on the Displacement of Maxillary Denture Teeth

Negreiros¹,

Mesquita²,

Sinhoreti³

et al. 2009

TODENTJ

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The purpose of this study was to verify the influence of flask closure methods and post-pressing times on tooth displacement in maxillary dentures. Twenty similar maxillary dentures were made using a heat-polymerized acrylic resin, and randomly assigned to 4 experimental groups (n=5) according to the protocol: 1-conventional flask closure and immediate polymerization; 2- conventional flask closure and polymerization after 6-hour post-pressing time; 3- RS flask closure system and immediate polymerization; and 4- RS flask closure system and polymerization after 6-hour post-pressing time. Three transverse and 2 anteroposterior linear distances between teeth were measured before and after the denture processing with an optical microscope with accuracy of 0.0005mm. Analysis of variance (ANOVA) and Tukey’s test were performed to compare the results. The 6-hour post-pressing time (conventional = 0.44mm and RS = 0.33mm) showed no statistically significant difference in tooth movement, in relation to the flask closure methods, when compared to the immediate time (conventional = 0.40mm and RS = 0.28mm). The RS system standardized the tooth displacement, independently of the post-pressing times. Dimensional changes were more uniform when the dentures were submitted to the 6-hour post-pressing time and RS flask closure method, suggesting that these factors may reduce the magnitude of tooth movement.

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Section: Discussionmentioning

confidence: 99%

Effect of Flask Closure Method and Post-Pressing Time on the Displacement of Maxillary Denture Teeth

Negreiros¹,

Mesquita²,

Sinhoreti³

et al. 2009

TODENTJ

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“…This result might be due to the difference in the mixing procedure and/or in viscous changes after applying the load of the impression materials. Although a standardized process in the weighing the impression material for evaluating denture adaptation has emphasized 11,18) , further variables, such as the mixing ratio, type of material, viscoelastic behavior with time and temperature, and applied load should also be considered 33) . The previous results reported an increase in the weight of the impression material trapped under the denture base after storage in water for 14-30 days 19,34) , while the maximum palatal gap of several denture bases decreased after storage in water for more than 14 days 24) .…”

Section: Discussionmentioning

confidence: 99%

“…It was reported that the adaptation accuracy of the upper denture base can be influenced significantly by the existence of denture teeth 4,5,18) . Therefore, anatomical artificial teeth (#264 for anterior, 32M for posterior, Biotone, Dentsply, USA) were arranged in the wax denture.…”

Section: Preparation Of Denture Base Samplementioning

confidence: 99%

“…Microscopic measurements of the posterior border gap [11][12][13][14][15][16] and weighing a elastomeric material impressed under a denture base 11,[17][18][19] are one of the most frequently used methods to evaluate the denture adaptation to a master cast due to their simplicity and feasibility. The magnitude of the palatal border gap can express the ability of a border seal, and the weight of an impression material indicates the overall volume of internal space under denture base, which are all important factors in complete denture retention 8) .…”

Section: Introductionmentioning

confidence: 99%

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Comparative adaptation accuracy of acrylic denture bases evaluated by two different methods

et al. 2010

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This study examined the adaptation accuracy of acrylic denture base processed using fluid-resin (PERform), injection-moldings (SRIvocap, Success, Mak Press), and two compression-molding techniques. The adaptation accuracy was measured primarily by the posterior border gaps at the mid-palatal area using a microscope and subsequently by weighing of the weight of the impression material between the denture base and master cast using hand-mixed and automixed silicone. The correlation between the data measured using these two test methods was examined. The PERform and Mak Press produced significantly smaller maximum palatal gap dimensions than the other groups (p<0.05). Mak Press also showed a significantly smaller weight of automixed silicone material than the other groups (p<0.05), while SR-Ivocap and Success showed similar adaptation accuracy to the compressionmolding denture. The correlationship between the magnitude of the posterior border gap and the weight of the silicone impression materials was affected by either the material or mixing variables.

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“…The teeth are held firmly in place by the gypsum investment, which probably induces complex stress in the denture base. The resulting restriction may also contribute to the inhibition of the tooth shift 8 . Although the distortion may occur in the denture base, the anteroposterior distance may be maintained unmodified due to the interproximal contact of the artificial teeth 9 .…”

mentioning

confidence: 99%

Influence of Flask Closure and Flask Cooling Methods on Tooth Movement in Maxillary Dentures

Domitti

Mesquita

Consani³

2006

Journal of Prosthodontics

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The effect of relining on the accuracy and stability of maxillary complete dentures—An in vitro and in vivo study

Cited by 30 publications

References 7 publications

Effect of Flask Closure Method and Post-Pressing Time on the Displacement of Maxillary Denture Teeth

Effect of Flask Closure Method and Post-Pressing Time on the Displacement of Maxillary Denture Teeth

Comparative adaptation accuracy of acrylic denture bases evaluated by two different methods

Influence of Flask Closure and Flask Cooling Methods on Tooth Movement in Maxillary Dentures

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