Prosthetic Abutment Height is a Key Factor in Peri-implant Marginal Bone Loss

Abstract

In this study, we analyzed the influence of prosthetic abutment height on marginal bone loss (MBL) around implants in the posterior maxilla. In this retrospective cohort study, the radiographically determined MBL was related to the height of the abutments of internal conical connection implants at 6 and 18 months post-loading. Data were gathered on age, sex, bone substratum, smoking habit, history of periodontitis, and prosthetic features, among other variables. A linear mixed model was used for statistical analysis. The study included 131 patients receiving 315 implants. MBL rates at 6 and 18 months were mainly affected by the abutment height but were also significantly influenced by the bone substratum, periodontitis, and smoking habit. MBL rates were higher for prosthetic abutment < 2 mm vs. ≥ 2 mm, for periodontal vs. non-periodontal patients, for grafted vs. pristine bone, and for a heavier smoking habit. The abutment height is a key factor in MBL. MBL rates followed a non-linear trend, with a greater MBL rate during the first 6 months post-loading than during the next 12 months.

Comparison of two different surgical approaches to increase peri‐implant mucosal thickness: A randomized controlled clinical trial

“…The presence of initially thicker crestal mucosa or augmenting thin tissue at the time of placement may attenuate marginal bone changes after implant placement. 18 While the above studies have concluded that thicker PMT, whether it is initially thick or thin and augmented, is preferred, the authors of a recent systematic review have concluded that there is insufficient evidence to establish a minimum tissue thickness that would be required to prevent marginal bone level changes. Sites with initially thin tissue that were not grafted lost a significantly greater amount of bone (1.2 ± 0.08 mm) as compared to the thingrafted and thick groups (0.22 ± 0.06 mm).…”

Marginal Bone Loss in Implants Placed in the Maxillary Sinus Grafted With Anorganic Bovine Bone: A Prospective Clinical and Radiographic Study

“…For Galindo‐Moreno et al, 25 abutment height is a key factor in MBL, and they reported higher MBL for abutments <2 mm compared with those ≥2 mm. In their study, 315 implants placed in the posterior maxilla in 131 patients with follow‐up of 18 months were included.…”

“…Moreover, regardless if implants were placed either in the maxilla or mandible, and without specifying supporting tissue (i.e., grafts or native bone), implants still presented good results because only 20% of individuals and 11% of sites lost >1 mm, whereas 8% of individuals and 4% of sites lost >2 mm of marginal bone 24 . Galindo‐Moreno et al 25 , 26 compared MBL between native bone and grafted sinus, resulting in statistically significant differences in MBL between implants placed in grafted (1.09 mm) versus pristine (0.71 mm) bone at the 12‐month follow‐up. However, there were no differences in subsequent progression rate, which is in agreement with a previous study 13 .…”

“…These values were slightly higher than those of Cecchinato et al, 24 who showed a mean MBL of 0.2 ± 1.2 mm. However, this work considered the 1‐year postloading radiograph as baseline, which can underestimate these values because there is a greater rate of MBL during the first 6 months postloading 25 . Moreover, regardless if implants were placed either in the maxilla or mandible, and without specifying supporting tissue (i.e., grafts or native bone), implants still presented good results because only 20% of individuals and 11% of sites lost >1 mm, whereas 8% of individuals and 4% of sites lost >2 mm of marginal bone 24 .…”

The Breadth of Oral Health Research

“…Then, through early and late translation stages, we present clinical trials and observational research answering clinical questions, such as how we assess caries activity and prevention (Cagetti et al, 2014;Kuper et al, 2014), implant dentistry (Galindo-Moreno et al, 2014), saliva diagnostics for oral cancer (Momen-Heravi et al, 2014), and cardiovascular diseases (Miller et al, 2014).…”