Long-term changes in graft height after maxillary sinus augmentation, onlay bone grafting, and combination of both techniques: a long-term retrospective cohort study

Schmitt C, Karasholi T, Lutz R, Wiltfang J, Neukam FW, Schlegel KA (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Clinical Oral Implants Research Wiley-Blackwell

Book Volume: 25

Pages Range: e38-46

Journal Issue: 2

DOI: 10.1111/clr.12045

Abstract

This investigation focused on long-term changes in graft height, implant survival rate, and peri-implant tissue conditions of dental implants placed in alveolar ridges after augmentation procedures with a follow-up of 10 years.We conducted a retrospective cohort study with prospective long-term follow-up of 25 patients with edentulous severe atrophic maxillary situations who received a vertical augmentation procedure with autologous bone prior to implant placement. The participants were divided into three groups according to whether they underwent sinus elevation, onlay grafting, or a combination of both techniques. After a four-month healing period, 127 implants were inserted in the corresponding regions. Following a six-month healing period, the participants underwent prosthodontic rehabilitation, incorporating a fixed or removable implant denture. The cohort was clinically and radiographically followed up 1, 5, and 10 years after augmentation. The following parameters were measured: radiographic vertical bone changes, implant loss, peri-implant pocket depth (PD), width of keratinized mucosa (KM), sulcus fluid flow rate (SFFR), and the radiographic distance between the implant shoulder and the first visible bone-to-implant contact (DIB).Seven implants were lost during the observation period, resulting in a cumulative 10-year survival rate of 94.48%. Significant bone loss occurred during the first 12 months, after which the resorption slowed down and bone height eventually stabilized. After 10 years, the total vertical bone loss was 27.51% after onlay grafting, 28.14% after sinus elevation, and 30.24% in the combination group, with no statistically significant between-group differences. Peri-implant follow-up examinations revealed a positive correlation between SFFR and PD, respectively, DIB, and a negative correlation between SFFR and KM.The treatment method does not seem to impact vertical bone loss following augmentation using autologous grafts. This approach results in long-term stability of dental implants. A sufficient width of keratinized peri-implant mucosa is important to prevent peri-implant bone loss and inflammation.

Authors with CRIS profile

Christian Schmitt Lehrstuhl für Zahnmedizin, insbesondere Mund-, Kiefer-, und Gesichtschirurgie Rainer Lutz Department of Oral and Cranio-Maxillofacial Surgery Friedrich Wilhelm Neukam Lehrstuhl für Zahnmedizin, insbesondere Mund-, Kiefer-, und Gesichtschirurgie

Involved external institutions

Christian-Albrechts-Universität zu Kiel

Germany (DE)

How to cite

APA:

Schmitt, C., Karasholi, T., Lutz, R., Wiltfang, J., Neukam, F.W., & Schlegel, K.A. (2014). Long-term changes in graft height after maxillary sinus augmentation, onlay bone grafting, and combination of both techniques: a long-term retrospective cohort study. Clinical Oral Implants Research, 25(2), e38-46. https://doi.org/10.1111/clr.12045

MLA:

Schmitt, Christian, et al. "Long-term changes in graft height after maxillary sinus augmentation, onlay bone grafting, and combination of both techniques: a long-term retrospective cohort study." Clinical Oral Implants Research 25.2 (2014): e38-46.

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