Condition category
Oral Health
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
The aim of this study is to evaluate the healing following surgical periodontal treatment with a special decontamination method that contains a powder made of a special type of sugar (Erythritol). This method is compared with the traditional cleaning method using hand instruments.

Who can participate?
Patients with a tooth with one root that is in need of further periodontal surgical therapy

What does the study involve?
During surgery, the gingiva will be raised and all inflammation tissue will be removed. Patients will be randomly allocated to one of two treatment procedures: a) test treatment consisting of careful removal of calculus (if present) with the tip of a blade and subsequent decontamination of the diseased root surface with erythritol using an air-polishing device and b) control group treatment consisting of thorough mechanical cleaning with hand curettes and ultrasonic instruments. Depth of periodontal pockets, the level of the measurable gingival attachment, the measurable bone level in the mouth and on the x-ray will be evaluated before the surgery and 12 months after.

What are the possible benefits and risks of participating?
With either study treatment (test or control) there will be a resolution of the inflammation in the treated area (tooth with a remaining deep clinical periodontal pocket which is at high risk for further bone loss) and thus arrest the progression of periodontitis and bone loss. The risks for participating are the general risks as for any type of dental periodontal surgery: bleeding, swelling, pain, which are actually in good control since the surgical protocol includes tight suturing of the operated area, and painkillers if need.

Where is the study run from?
University of Medicine and Pharmacy Cluj-Napoca (Romania)

When is the study starting and how long is it expected to run for?
September 2013 to July 2019

Who is funding the study?
Investigator initiated and funded

Who is the main contact?
Dr Raluca Cosgarea

Trial website

Contact information



Primary contact

Dr Raluca Cosgarea


Contact details

Str. Clinicilor nr 33
+40 (0)751638904

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Healing following periodontal surgery and root surface decontamination by means of an erythritol based air-polishing



Study hypothesis

The clinical outcomes following conventional periodontal surgery (e.g. access flap using a simplified papilla preservation flap-SPPF) using the new erythritol powder applied with an air-polishing device are not inferior to those after the use of conventional hand and ultrasonic instruments in supra-alveolar bony defects.

Ethics approval

Approved 25/10/2013, Ethical Committee of the University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca (Str. Emil Isaac nr 13, Cluj-Napoca, Romania; Tel: +40 (0)264 597256; Email:, ref: #201/25.19.2013

Study design

Prospective randomized controled clinical trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use contact details to request a participant information sheet


Periodontitis with horizontal bone loss


Thirty systemically healthy patients with periodontitis are included in the present study. Inclusion criteria are the presence of a single-rooted tooth with a probing pocket depth (PD) ≥ 6 mm associated with horizontal bone loss as detected at re-evaluation following nonsurgical periodontal therapy.

These sites are in need for further surgical therapy. Following flap preparation by means of simplified papilla preservation flap (SPPF) and removal of granulation tissue, patients are randomized (according to a computer-generated list, block randomisation procedure) as follows:
1. Test treatment consisting of careful removal of calculus (if calculus present) with the tip of a blade and subsequent air-polishing of the root surfaces with erythritol air-polishing (EMS, Switzerland)
2. Control group treatment consisting of thorough scaling and root planing (SRP) with hand curettes and ultrasonic instruments

Parameters PD, clinical attachment (CAL), bone sounding (BS), and radiological bone level (BL) are evaluated at baseline and 12 months postsurgically. The primary outcome variable is CAL-gain.

Intervention type



Drug names

Primary outcome measure

Clinical attachment (CAL), measured with a periodontal probe (PCP UNC 15, Hu Friedy) from the bottom of the periodontal pocket to the cementum-enamel-junction, at baseline and 12 months

Secondary outcome measures

Measured at baseline and 12 months:
1. Periodontal pockets measured with a periodontal probe (PCP UNC 15, Hu Friedy) from the bottom of the periodontal pocket to the gingival margin
2. Bone sounding (BS) measured with a periodontal probe (PCP UNC 15, Hu Friedy) under anaesthesia in contact to the bone within the periodontal pocket to the gingival margin
3. Radiological bone level (BL) measured on x-rays as the distance from the most apical point of the intrabony defect to the cemento-enamel junction

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Patients have to present one single-rooted tooth with a PD ≥ 6mm and horizontal bone loss with a maximum 2 mm intrabony component as detected radiographically (experimental tooth)
2. Over 18 years old
3. Completed the nonsurgical periodontal therapy (initial anti-infective therapy) at least 3 months prior to study inclusion or be in the corrective phase of the periodontal treatment or engaged in SPT
4. Maintain a good level of oral hygiene [plaque control record (PCR) after O’Leary 1972 ≤ 25%] (O'Leary et al., 1972)

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Infectious/heart diseases that need prophylactic administration of antibiotics before dental treatments
2. History of diseases that may have influenced the severity/progression of periodontitis (e.g. Down Syndrome, HIV, Diabetes Mellitus type 1 and 2)
3. Liver diseases
4. Post-irradiation in the head/neck area
5. Periodontal surgery at the experimental teeth in the past 12 months
6. Clinical and/or radiographical signs of a vertical/horizontal tooth fracture or occlusal trauma at the test teeth
7. Pregnant or breastfeeding subjects
8. Patients smoking >10 cigarettes per day (Tonetti et al., 1995)

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

University of Medicine and Pharmacy Cluj-Napoca
Department of Prosthodontics Str Babes nr 8

Sponsor information


University of Medicine and Pharmacy Iuliu Hatieganu

Sponsor details

Department of Prosthodontics
Str. clinicilor nr 33
+40 (0)264 597 256

Sponsor type




Funder type


Funder name

Investigator initiated and funded

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

A study protocol will not be available online. This will be provided only per request and a detailed description in the publication. Presentation at dental conferences and publication in specialized dental journals.

IPD sharing statement
The dataset will not be available online according to the data protection law. The data will be held on university computers and accessed only by authorized study persons.

Intention to publish date


Participant level data

Not expected to be available

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

21/02/2020: Trial's existence confirmed by the Ethical Committee of the University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca.