Novel expandable short dental implants with reduced vertical bone height
Novel expandable short dental implants in situations with reduced vertical bone height—technical note and first results
Abstract
Purpose
Short implants often have the disadvantage of reduced primary stability. The present study was conducted to evaluate the feasibility and safety of a new expandable short dental implant system intended to increase primary stability.
Methods
As a “proof of concept”, a prospective clinical cohort study was designed to investigate intraoperative handling, primary and secondary implant stability (resonance frequency analysis), crestal bone changes, implant survival and implant success, of an innovative short expandable screw implant. From 2014 until 2015, 9 patients (7–9-mm vertical bone height) with 30 implants (length 5–7 mm, diameter 3.75–4.1 mm) were recruited consecutively.
Results
All 30 implants in the 9 patients (age 44 to 80 years) could be inserted and expanded without intraoperative problems. Over the 3-year follow-up period, the implant success rate was 28/30 (93.3%). The mean implant stability quotients (ISQ) were as follows: primary stability, 69.7 ± 10.3 ISQ units, and secondary stability, 69.8 ± 10.2 ISQ units (p = 0.780), both without significant differences between the maxilla and mandible (p ≥ 0.780). The mean crestal bone changes after loading were (each measured from the baseline) as follows: in the first year, 1.0 ± 0.9 mm in the maxilla and 0.7 ± 0.4 mm in the mandible, and in the second year, 1.3 ± 0.8 mm and 1.0 ± 0.7 mm, respectively.
Conclusions
Compared to other prospective studies, in this indication, the success rate is acceptable. Implant stability shows high initial and secondary stability values. The system might present an extension of functional rehabilitation to the group of elderly patients with limited vertical bone height. Further long-term investigations should directly compare this compressive implant with standard short implants.
Serial posts:
- Novel expandable short dental implants with reduced vertical bone height
- Introduction : Novel expandable short dental implants (1)
- Introduction : Novel expandable short dental implants (2)
- Material & methods : Novel expandable short dental implants (1)
- Material & methods : Novel expandable short dental implants (2)
- Results : Novel expandable short dental implants (2)
- Discussion : Novel expandable short dental implants (1)
- Discussion : Novel expandable short dental implants (2)
- Discussion : Novel expandable short dental implants (3)
- Discussion : Novel expandable short dental implants (4)
- Discussion : Novel expandable short dental implants (5)
- Table 1 Patient recruitment
- Table 2 Surgical treatment protocol
- Table 3 Prosthetic treatment protocol
- Table 4 Clinical characteristics of the study cohort
- Figure 1. a Closed short expandable dental implant
- Figure 2. Cumulative implant survival over the follow-up period
- Figure 3. a Primary implant stability
- Figure 4 a–h Prosthetic restauration—follow-up examination. Intraoral and perioral views of a rehabilitated female patient. (She asked explicitly only for implantological treatment in the mandible.)
- Figure 5 Postoperative orthopantomogram