Long‐term stability of osseointegrated implants in bone regenerted with the membrane technique. 5‐year results of a prospective study with 12 implants.

Abstract

The purpose of the present clinical study was to evaluate the 5-year results of the first 12 implants inserted at the University of Berne in regenerated bone following successful ridge augmentation with the membrane technique. The patients were recalled and examined with clinical and radiographic parameters routinely utilized in prospective studies with standard implants in non-regenerated bone. Based on clinical and radiographic findings, all 12 implants were considered successfully integrated according to strict criteria of success. The detailed analysis of clinical parameters revealed no differences to results of prospective studies on standard implants in non-regenerated bone. All implants demonstrated ankylotic stability which was confirmed by a mean Periotest value of -2.08. The radiographic analysis showed stable bone crest levels with a mean bone loss between the 1- and 5-year examination of 0.30 mm. However, 2 implants exhibited a bone loss of more than 1 mm between the 1- and 5-year examination. Therefore, the prognosis of these 2 implants seems questionable at the present time. It can be concluded that bone regenerated with the membrane technique reacts to implant placement like non-regenerated bone, since all 12 implants achieved successful tissue integration with functional ankylosis. Furthermore, this bone is also load-bearing, since all 12 implants maintained osseointegration over a 5-year period.

Aesthetics and Survival of Immediately Restored Implants in Partially Edentulous Anterior Maxillary Patients

“…In the present study, an attempt had been made to minimize the potential collapse of buccal bone by using slow resorbable allograft mineralized material in the space that was created by the dimensional discrepancy between the bony walls of the extraction socket and the body of the implant, commonly described as the "gap". A collagen membrane was used to enhance bone regeneration and reduce the risk of membrane infection in the event of any soft-tissue dehiscence occurring postoperatively [53,54]. A recent study [55] demonstrated that facial soft-tissue thickness (labio-palatal) was greater at sites that received bone grafts and provisional restorations compared to sites without either grafts or restorations.…”

Informative title: Guided bone regeneration with and without rhBMP‐2: 17‐year results of a randomized controlled clinical trial

“…In order to assess the interproximal marginal bone level (MBL) around the implants, digital intraoral radiographs were taken using the long‐cone paralleling technique with the central beam directed to the alveolar crest (Hawe x‐ray film holder; Kerrhawe SA). Utilizing an image analysis program ( image j , Version 1.52a, Rasband, 1997 –2018), the MBL (distance between the implant shoulder (IS) and the first bone to implant contact) was measured at the mesial and distal aspect with a 10–15× magnification (Buser et al, 1996 ; Weber et al, 1992 ). The measured distance between three implant threads was used to determine the exact magnification and distortion of the images (Rodoni et al, 2005 ).…”

Allograft and Collagen Membrane Augmentation Procedures Preserve the Bone Level around Implants after Immediate Placement and Restoration

“…The low resorb ability of the graft can be advantageous, as it limits buccal bone resorption [39]. Collagen membranes were used to reduce the risk of infection if soft tissue dehiscence occurs postoperatively [40,41]. The osteoconductive properties of mineralized allografts have been previously described [42].…”