Organization of the connective tissue barrier around long‐term loaded implant abutments in man

Abstract

The study aimed to investigate the connective tissue seal and the spatial organization of collagen fibers around long-term loaded implants in man. Block specimens containing smooth titanium implant abutments and the surrounding supracrestal connective tissue were obtained from patients rehabilitated for at least 1 year with implant-retained overdentures or implant-supported fixed prostheses and were histologically investigated. The histological features of the connective tissue around long-term loaded titanium abutments were specific: the tissue was rich in collagen fibers, organized in bundles, presenting a constant spatial arrangement, similar to that reported in animal studies. Circular fibers, the most numerous, were located externally, and longitudinal fibers internally. Radial fibers inserted on the abutment surface, similar to those of the periodontal system, were not observed in any case. No histological differences were found between tissue sampled around implants supporting a fixed restoration and those anchoring an overdenture.

Biologic Width and Morphologic Characteristics of Soft Tissues Around Immediately Loaded Implants: Studies Performed on Human Autopsy Specimens

“…This is probably due to the presence of a PS. Regarding the collagen fiber orientation, the present results are generally consistent with the findings of Schierano et al 34 and Glauser et al, 13 even though a difference concerning the adaptation of circular collagen bundles to the PS abutment, which produced the S shape, was found. Compared to standard abutments, this latter aspect meant that there was a higher quantity of space that was able to be occupied by collagen bundles in the PS abutments.…”

“…Also, the fibers appeared to be more prominent on microtextured, compared to smooth transmucosal, surfaces in a dog experiment. 19 In a recent human study, Schierano et al 34 evaluated the organization of the CT around nine loaded implants in seven patients. They found a constant spatial arrangement of the peri-implant CT.…”

Nonremoval of Immediate Abutments in Cases Involving Subcrestally Placed Postextractive Tapered Single Implants: A Randomized Controlled Clinical Study

“…9,10,12 Our study was unable to find a connection between the amount of buccal recession and the biotype of the patient. 22,23 The assessments of our paper are in concordance with the findings of Becker and colleagues 24 that reported an increased apical extension of the junctional epithelium and an increased bone resorption after repeated abutment disconnection/reconnection at 4 and 6 weeks after surgery. This difference was, however, not statistically significant (test group: p = .12; control group: p = .38).…”

Creeping Attachment Involving Dental Implants: Two Case Reports with a Two-Year Follow-Up from an Ongoing Clinical Study

“…It is known that the soft tissue behaves differently on implant surfaces. Histological studies show a parallel behavior of fibers on the surface of the implant or prosthetic abutment [18]. Several studies have been proposed to test different surfaces of the implant that would stimulate the straight insertion of the soft tissue fibers of which only one was able to be proven convincingly [19].…”