Stability change of chemically modified sandblasted/acid‐etched titanium palatal implants. A randomized‐controlled clinical trial

Abstract

Aim: The aim of this randomized‐controlled clinical study was to examine stability changes of palatal implants with chemically modified sandblasted/acid‐etched (modSLA) titanium surface compared with a standard SLA surface, during the early stages of bone healing. Materials and methods: Forty adult volunteers were recruited and randomly assigned to the test group (modSLA surface) and to the control group (SLA surface). The test and control implants had the same microscopic and macroscopic topography, but differed in surface chemistry. To document implant stability changes resonance frequency analysis (RFA) was performed at implant insertion, at 7, 14, 21, 28, 35, 42, 49, 56, 70 and 84 days thereafter. RFA values were expressed as an implant stability quotient (ISQ). Results: Immediately after implant installation, the ISQ values for both surfaces tested were not significantly different and yielded mean values of 73.8±5 for the control and 72.7±3.9 for the test surface. In the first 2 weeks after implant installation, both groups showed only small changes and thereafter a decreasing trend in the mean ISQ levels. In the test group, after 28 days a tendency towards increasing ISQ values was observed and 42 days after surgery the ISQ values corresponded to those after implant insertion. For the SLA‐control group, the trend changed after 35 days and yielded ISQ values corresponding to the baseline after 63 days. After 12 weeks of observation, the test surface yielded significantly higher stability values of 77.8±1.9 compared with the control implants of 74.5±3.9, respectively. Conclusion: The results support the potential for chemical modification of the SLA surface to positively influence the biologic process of osseointegration and to decrease the healing time.

Mini-implant stability at the initial healing period: A clinical pilot study

“…29 The current results show only slight changes of stability during the first 2 weeks followed by the typical decrease of stability from week 2 to week 4. The same was found by Schä tzle et al, 30 who investigated the healing period of palatal implants with SLA surface and 4.1-mm diameters inserted in the midpalatal region. They investigated a subsequent increase of ISQ values.…”

Sandblasted and Acid-Etched Implant Surfaces With or Without High Surface Free Energy: Experimental and Clinical Background

“…For implants placed in the maxilla, only palatal-inserted orthodontic implants (Orthosystem ® , Institut Straumann AG, Basel, Switzerland) with a modSLA surface showed signifi cantly increased ISQ values after 12 weeks of healing compared to SLA implants (electronic RFA). Furthermore, it was reported that the transition point from decreasing to increasing ISQ values was obtained after 28 days for modSLA and after 35 days for SLA [ 172 ] supporting the study by Oates et al [ 168 ]. These results, taken together, suggest that modSLA implants integrate faster compared to SLA implants in the early healing period, when investigating implant stability.…”

A bisphosphonate-coating improves the fixation of metal implants in human bone. A randomized trial of dental implants

“…Modifications of dental implants, leading to increased surface energy, have shown a larger increase in ISQ from insertion to 12 weeks than controls in a randomized trial. [10] However, the treatment effect in that trial appeared less than the effect observed in the present trial, suggesting that the use of local drug release might be a more promising principle than physicochemical surface modifications.…”