Peri-implant bone changes following tooth extraction, immediate placement and loading of implants in the edentulous maxilla

Abstract

The aim of this study was to clinically and radiographically evaluate peri-implant bone level changes after rehabilitation of a fully edentulous maxilla by placement of six implants in either fresh extraction sites or healed edentulous ridges up till 18 months after implant placement. Twenty patients with a terminal dentition in the maxillae (11 men, 9 women) received a total of 120 OsseoSpeed® implants; 118 implants could be loaded immediately of which 59 were placed in extraction sockets and 59 were placed in healed sites. Within 24 h after surgery, all patients received a chairside-assembled, fibrereinforced temporary fixed prosthetic reconstruction in occlusion. Six months post-surgery, final screw-retained CoCr (15) or Ti (5) computer numerical control-milled and acrylic-veneered frameworks were placed directly at implant level without interposing abutments. Intraoral radiographs were taken 6 and 18 months after implant placement. Implant survival rate was 100%. Mean marginal bone level was located on average −0.35 mm below the reference point (standard deviation 0.29, range −1.20 to +0.02 mm) 18 months after loading. Whether implants were placed in healed bone sites or fresh extraction sockets did not significantly affect the bone level changes. Furthermore, the use of either CoCr or Ti at the implant level did not significantly affect marginal bone loss. Within the limits of this prospective clinical trial, results seem to indicate that immediate placement and occlusal loading of five to six implants in the edentulous maxilla can be carried out successfully. Whether or not those implants are placed in fresh extraction sockets does not seem to alter the outcome. The present data show a successful 1-year outcome of a treatment protocol involving tooth extraction immediately combined with implant placement and loading.

The Effect of Age, Gender, and Insertion Site on Marginal Bone Loss around Endosseous Implants: Results from a 3-Year Trial with Premium Implant System

“…Thread design, spacing, and implant diameter can all affect force transfer to bone [12], and therefore every new implant system should be tested to investigate its effectiveness to preserve adequate bone levels. MBL is affected by surgical technique to a lesser extent [13], and no differences were reported in the literature between one- or two-stage implant placement, in the absence of infection [14]. …”

Immediate implant and rehabilitation based on All‐on‐4 concept in patients with generalized aggressive periodontitis: A medium‐term prospective study

“…The implant platform (the horizontal interface between the implant and the abutment) was used as the reference for each measurement; the linear distance (in millimeters) between the platform and the most coronal bone‐to‐implant contact was measured …”

Implant vs abutment level connection in implant supported screw‐retained fixed partial dentures with cobalt‐chrome framework: 1‐year interim results of a randomized clinical study

“…In contrast to AL setup, the accuracy of IL framework seems to be negatively affected by implant disparallelism, when using systems with internal connection . Thus, it was advocated not to have excessive disparallelism between the implants in this setup …”