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Avances en Odontoestomatología

versão impressa ISSN 0213-1285

Resumo

SANCHEZ YSMAYEL, A.E.  e  VILLARROEL DORREGO, M.. Clinical evaluation of direct retainer adaptation in distal extension removable partial dentures. Av Odontoestomatol [online]. 2012, vol.28, n.3, pp.151-158. ISSN 0213-1285.

Introduction: The purpose of this study was to clinically evaluate the adaptation of direct retainers used in distal extension Removable Partial Dentures (RPD) and to determine the relationship between the retainer design and the adjustment of this element. Materials & methods: 84 subjects recently rehabilitated with RPD were included in the study. The evaluation process included the use of a fluid silicone material as a detection substance in addition to a digital gauge to determinate the distance of the rest upon the abutment teeth. Space was calculated in mm and mean± standard deviation determined. Adjustment of the retainers was compared using chi2 and t Student tests. P values<0,05 were considered statistically significant. Results: A total of 168 direct retainers were evaluated and only 9% contact in the center of the rest was observed. Average of space was 0,1892 ± 0,25216 mm and no difference was observed when type of retainers was compared (p= 0,261). On retentive and stabilizing elements of the direct retainers it was noted that contact occurs mostly on its terminal part, however, adjustment of those elements varied depending on the design of direct retainer used (p= 0,0001). Discussion: Direct retainer adjustment of RPD evaluated was deficient and adaptation of retentive and stabilizing elements was directly dependant on direct retainer design. RPD are a low cost and practical solution for population dental rehabilitation, nonetheless, correct prosthetic plan and strict adaptation of the denture are required to warrant an oral healthy status.

Palavras-chave : Adjustment; retainer; removable partial dentures; dental prosthesis.

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