Abstract
Abstract Objective To evaluate and correlate the values of radiographic bone density, peri-implant bone height and resonance frequency analysis (RFA) of short or conventional implants placed in the posterior region of the mandible after installing a prosthesis. Material and method Eleven patients were selected for this prospective parallel pilot study. The prostheses were supported by two types of implants: short implants (n = 18) (5.0 x 5.5 mm and 5.0 x 7.0 mm) and conventional implants (n = 23) (4.0 x10 mm and 4.0 x 11.5 mm). The implants were evaluated by RFA, by measuring the bone height, and peri-implant bone density. The implants were evaluated at the periods T0 (immediately after installation of the prosthesis), T1 (after 90 days), and T2 (after 180 days). Result There were no statistically significant differences between groups with respect to radiographic bone density (152.50 ± 15.39 vs. 157.60 ± 28.46, for conventional and short implants, respectively at T2), stability of the implants (Conventional implants: 66.76 ± 10.39 at T0, and 61.85 ± 8.38 at T2 vs. Short implants: 57.50 ± 12.17 at T0, and 61.53 ± 7.39 at T2) and peri-implant bone loss (0.03 mm vs.-0.17 mm, for conventional and short implants, respectively at T2). Additionally, a significant correlation between the evaluated parameters was not detected. Conclusion The short and conventional implants presented similar stability, bone level and density after the activation of occlusion loading.
Highlights
Dental implants have been used predictably for the treatment of all forms of edentulism[1,2]
One study showed that success rates of short implants installed in the posterior region of the jaws were 65.2% after a follow up of 16 to 57 months, which is lower than expected for conventional implants in this same type of situation[13]
Considering that short implants may interfere with the success and survival of the oral rehabilitation, the aim of this study was to evaluate and compare the values of radiographic bone density, peri-implant bone height and resonance frequency analysis of short and conventional implants installed in the posterior region of the mandible after installation of the temporary implant-supported prosthesis
Summary
Dental implants have been used predictably for the treatment of all forms of edentulism[1,2] Anatomical conditions such as bone atrophy create technical difficulties for the installation of implants of a conventional size[3,4]. Techniques such as guided bone regeneration, inlay block grafts[5], sinus floor augmentation[6], osteodistraction[7], and lateralization of the inferior alveolar nerve[8] have been proposed for individuals with decreased bone height and thickness to allow for placement of a conventionally sized implant. Considering that short implants may interfere with the success and survival of the oral rehabilitation, the aim of this study was to evaluate and compare the values of radiographic bone density, peri-implant bone height and resonance frequency analysis of short and conventional implants installed in the posterior region of the mandible after installation of the temporary implant-supported prosthesis
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