The Open Dentistry Journal

ISSN: 1874-2106 ― Volume 14, 2020

Using Resonance Frequency Analysis to Compare Delayed and Immediate Progressive Loading for Implants Placed in the Posterior Maxilla: A Pilot Study

Mohammed Jasim AL Juboori1, *, Mohammed Ahmed AL Attas2, Raquel Zita Gomes3, Basma Fathi Alanbari1
1 Department of Periodontology, Al-Rafidain College, Baghdad, Iraq
2 Department of Prosthodontic and Dental Implant, Riyadh Dental Center, King Saud Medical City, Riyadh, Saudi Arabia
3 Department of Oral Surgery, Faculty of Dental Medicine, University of Porto, Porto, Portugal



Implants placed in the posterior region of the maxilla have a high incidence of implant failure due to poor bone quality, especially when immediate implant loading is needed. Immediate Progressive Loading (IPL) can enhance bone quality and may offer an alternative solution when Immediate Implant loading is needed.


Six patients (one male and five females; 34-62 years old) were included in this study. Twelve implants were inserted in the posterior region of the maxilla. Resonance Frequency Analysis (RFA) was performed at the time of implant placement and after 1, 2, 3 and 6 months. ISQ (Implant Stability Quotient) values were compared between the Delayed Loading (DL) group after 2 months and the Progressive Loading (PL) group and between different time points for each group.


At implant placement, the mean ISQ values for PL and DL implants were 63 and 57, respectively. One month after implant placement, the mean ISQ value for PL implants was 73.

Two months after implant placement, the mean ISQ value for PL implants was 75. Three months after implant placement, the mean ISQ values for PL and DL implants were 76 and 69, respectively. Six months after implant placement, the mean ISQ values for PL and DL implants were 79 and 76, respectively.


Despite its limitations, this pilot study indicated that compared to DL, PL can enhance bone density and implant stability, resulting in greater early functionality and fewer surgery sessions.

Keywords: Maxillary bone, Provisional crown, Implant stability, Bone density, Bone-Implant Contact (BIC), Resonance Frequency Analysis (RFA).

Article Information

Identifiers and Pagination:

Year: 2018
Volume: 12
First Page: 801
Last Page: 810
Publisher Id: TODENTJ-12-801
DOI: 10.2174/1745017901814010801

Article History:

Received Date: 30/4/2018
Revision Received Date: 5/9/2018
Acceptance Date: 25/9/2018
Electronic publication date: 18/10/2018
Collection year: 2018

© 2018 Juboori et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Periodontology, Al-Rafidain University College, Palestine Street, P.O Box 46036, Baghdad, Iraq., Tel: (+964)7714559551, E-mail:


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