Progressive recovery of osseoperception as a function of the combination of implant-supported prostheses

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Abstract

Objectives

The aim of this study was to evaluate the recovery of interocclusal sensory perception for micro-thickness in individuals with different types of implant-supported prostheses.

Materials and Methods

Wearers of complete dentures (CDs) comprised the negative control group (group A, n=17). The experimental group consisted of wearers of prostheses supported by osseointegrated implants (Group B, n=29), which was subsequently divided into 4 subgroups: B1 (n=5) – implant supported overdentures (ISO) occluding with CD; B2 (n=6) – implant-supported fixed prostheses (ISFP) occluding with CD; B3 (n=8) – wearers of maxillary and mandibular ISFP, and B4 (n=10) – ISFP occluding with natural dentition (ND). Individuals with ND represented the positive control group (Group C, n=24). Aluminum foils measuring 10 μm, 24 μm, 30 μm, 50 μm, 80 μm, and 104 μm thickness were placed within the premolar area, adding up to 120 tests for each individual.

Results

The mean tactile thresholds of groups A, B1, B2, B3, B4, and C were 92 μm, 27 μm, 27 μm, 14 μm, 10 μm, and 10 μm, respectively. [Correction added after publication online 18 April 2008: in the preceding sentence 92 μm, 27 μm, 14 μm, 10 μm and 10 μm, was corrected to 92 μm, 27 μm, 27 μm, 14 μm, 10 μm and 10 μm.] The Kruskal-Wallis test revealed significant difference among groups (P<0.05). The Dunn test revealed that group A was statistically different from groups C, B3, and B4, and that B1 and B2 were statistically different from group C.

Conclusion

Progressive recovery of osseoperception as a function of the combination of implant-supported prostheses could be observed. Moreover, ISO and/or ISFP combinations may similarly maximize the recovery of osseoperception.

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