Extra short 4mm implants used to rehabilitation of atrophic posterior mandible. A serial case reports.

A Ramos,E Zenóbio,E Nunes,G Cornacchia,M Cosso,L De Souza

doi:10.4317/jced.56654

Abstract

Rehabilitation of patients through implants in areas with severe bone resorption in the posterior mandible is a challenge in implant dentistry. In this context, extra short implants configure a treatment option for this type of patient, as they can avoid increased financial cost, treatment time and patient morbidity. The present study evaluated the marginal bone stability in individualized extra-short implants for masticatory function in the posterior mandible. Using digitized periapical radiographs of 13 extra-short implants performed on 7 patients. The mesial and distal regions of each implant were selected, from the bone crest to the region parallel to the apex, and the bone stability of this crest was measured using the Image J software immediate T1 and 1 year after rehabilitation (T2). The height of the bone crest remained stable, showing no statistically significant difference between T1 and T2 (p> 0.005) for both the mesial bone crest and the distal bone crest in individual or united crowns rehabilitation. Marginal bone stability was observed in extra short implants, corroborating the biological and biomechanical stability of these implants presented in the literature. Despite the limited sample size and proservation time, extra-short implants are predictive treatment options for patients with severe bone atrophy in the posterior mandible. Key words:Extra-short implants, marginal bone loss, mandibular bone atrophy.

Highlights

Individuals with posterior mandibular bone atrophy who require implant rehabilitation may need more invasive surgeries to reconstruct bone tissue and subsequent fixation of regular implants
Each patient received 6 mandible implants, 2 anterior implants 10mm high and 4 additional 4 mm height implants in the posterior region distributed bilaterally. They found that stability and marginal bone loss were similar in both implant sizes.In the context of evaluating the predictability of extra-short implants, according to the classification [8], the present study evaluated marginal bone stability in extra-short implants for more than one year of single or united rehabilitation in serial cases
(6) cite in their study that extra-short implants indicated for patients with severe bone resorption, compared to regular implants, provided similar clinical results during 12 months of follow-up

Summary

Introduction

Individuals with posterior mandibular bone atrophy who require implant rehabilitation may need more invasive surgeries to reconstruct bone tissue and subsequent fixation of regular implants. Each patient received 6 mandible implants, 2 anterior implants (inter-foramen) 10mm high and 4 additional 4 mm height implants in the posterior region distributed bilaterally They found that stability and marginal bone loss were similar in both implant sizes.In the context of evaluating the predictability of extra-short implants, according to the classification [8], the present study evaluated marginal bone stability in extra-short implants for more than one year of single or united rehabilitation in serial cases. The patients showed mandibular posterior bone atrophy, characterized by available bone height less than or equal to 7mm measured from the upper cortical of the canal of the inferior alveolar nerve plexus These patients were rehabilitated with 13 extra-short implants, properly following all commercial system surgical protocols for such procedure. After the evaluation of extra-short implants, there was no statistically significant difference between T1 and T2, both in the mesial and distal bone crest (p> 0.05) independent of single or united crown rehabilitation (Table 1)

Discussion

Findings

Mesial Distal