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Socket PreservationP-005NCT07099846

Hyaluronic Acid and Polynucleotides in Ridge Preservation

A study testing regeneration of post extraction socket with biomaterials in people with Socket Preservation and Implant-supported Single Crowns, run by University of Parma at 2 sites in Italy.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The aim of this study is to test the use of a bovine-derived bone graft combined with a polynucleotides-rich hyaluronic acid (PNHA) gel for the preservation of the bone after a tooth extraction (alveolar ridge preservation) and to test the performance of a fully-digital workflow to rehabilitate the site with a dental… Read more about this study

Who is it for?
Ages 25 years and older
What is being tested?
regeneration of post extraction socket with biomaterials
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
40 participants
Where
2 sitesItaly
Study dates
9 Jun 2025to May 2028
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 25 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • ≥25-year-old males and females;
  • good systemic health (self-assessment);
  • presence of an unrestorable/hopeless tooth with periodontal attachment and buccal bone preserved at least for 2/3rd of the root and not associated with acute periapical pathology;
  • full mouth bleeding and plaque scores ≤ 25%

Who cannot join

  • uncontrolled or untreated periodontal disease;
  • history of local (head and neck) radiation therapy in the past 5 years;
  • acute endodontic lesion in the test tooth or in the neighbouring areas to the extraction procedure (sites with presence of an asymptomatic chronic lesion are eligible);
  • medical history that includes uncontrolled diabetes or hepatic or renal disease, or other serious medical conditions that can impact on bone metabolism (e.g. rheumatoid arthritis, osteoporosis) or transmittable diseases (e.g. HIV-related disease);
  • history of alcohol or drug abuse;
  • smokers of ≥10 cigarettes a day;
  • self-reported pregnancy or lactation.

Trial locations and contacts

2 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Elena Calciolari, DDS, MS, PhD contact

+390521903640

elena.calciolari@unipr.it

Federico Rivara, DDS, MS, PhD contact

+390521903640

federico.rivara1@unipr.it

Italy2 sites, 2 recruiting
  • Centro di Odontoiatria, Dipartimento di Medicina e Chirurgia, Università di Parma

    Parma, 43126

    Elena Calciolari, DDS, MS, PhD, +390521903640, elena.calciolari@unipr.it

    Elena Calciolari, DDS, MS, PhD

    Recruiting
  • Centro di Odontoiatria

    Parma, 43126

    Elena Calciolari, DDS, MS, PhD, 0521903640, elena.calciolari@unipr.it

    Federico Rivara, DDS, MS, PhD

    Recruiting

Other trials in Italy

About this study

Official title: The Use of Hyaluronic Acid and Polynucleotides in Ridge Preservation Sites Rehabilitated With a Complete Full Digital Workflow

The aim of this study is to test the use of a bovine-derived bone graft combined with a polynucleotides-rich hyaluronic acid (PNHA) gel for the preservation of the bone after a tooth extraction (alveolar ridge preservation) and to test the performance of a fully-digital workflow to rehabilitate the site with a dental implant. 40 patients in need for a single tooth extraction will be recruited at Centro di Odontoiatria, Università di Parma and they will be randomly assigned to 2 groups: extraction and spontaneous healing or extraction and regeneration of the site with a bovine-derived bone graft combined with a PNHA gel. At 4 months after extraction an implant will be placed in the extraction site, which will be rehabilitated with a fully-digital workflow and patients will be followed up at up to 12 months post rehabilitation. Two 3D x-rays with a small field of view will be performed immediately after extraction and at 4 months post extraction to plan implant placement. These images will also be used to assess changes in the dimension of the post extraction bone (primary outcome). As part of the study different questionnaires will be administered to assess quality of life and perception of the therapy and the wound exudate in the area of the extraction will be collected non invasively with a collagen sponge to assess the expression of different proteins during the early healing days. On the day of implant placement a sample of bone tissue will also be collected as part of the bone drilling and histologically analysed.

Read the detailed description

This is a single-centre, double-blind RCT involving 40 patients in need for a single tooth extraction to be replaced with a dental implant. The study consists of 11 visits, over a minimum period of 20 months. Participants will be recruited at Centro di Odontoiatria, at Università di Parma amongst patients routinely seen in new patient clinics and follow-up clinics. After atraumatic tooth extraction, participants will be randomly allocated to one of the following treatment groups: - DBBM (Bio-oss, Geistlich) mixed with a PNHA gel (Regenfast, Mastelli) and socket sealed with a porcine collagen matrix (Mucograft seal, Geistlich) (Test); - Unassisted socket healing (Control). Patient post-operative discomfort will be assessed with a visual analogue scale (VAS) and through clinician-reported post-operative oedema/swelling. Clinical evaluation of socket healing and recording of soft tissue healing index of Landry will also be performed during the early post-extraction days. With the help of a sterilecollagen sponge, wound exudate will be collected at 3, 7 and 14 days post extraction. A CBCT with a small field of view (e.g. 5X8 cm) will be taken to assess the post-extraction socket dimensions and after 4 months to plan implant placement. The CBCT scan will be processed with its embedded segmentation function to remove scattering defects and obtain the maximal possible quality.

Changes in alveolar ridge width from the extraction until 4 months post extraction between the 2 groups will be assessed with a dedicated software (e.g. SMOP) (primary outcome).

On the day of implant placement, a bone core biopsy will be collected from the drilling site. Undecalcified histology analysis will be done, and qualitative histology will be performed by a blind examiner, who will assess the level of maturation of the tissue in the two groups. Moreover, histomorphometric measurements will be recorded and presented descriptively, including amount of mineralized bone, as well as other standard parameters, such as %graft particles (test group only) and % of immature woven bone. A fully digital workflow will be followed to rehabilitate the patients, which will be followed up at up to 12 months post implant loading.

Being tested
regeneration of post extraction socket with biomaterials
Keywords
alveolar ridge preservation, hyaluronic acid, polynucleotides, digital workflow, CAD-CAM, Implant rehabilitation

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • regeneration of post extraction socket with biomaterialsDevice

    Also called alveolar ridge preservation, socket preservation

    after tooth extraction, in the test group we will place a demineralised bovine bone graft mixed with a gel containing hyaluronic acid and polynucleotide and we will cover the entrance of the socket with a collagen matrix

Study groups in NCT07099846
Study groupRoleWhat they receive
Spontaneous post extraction healingNo interventionThe control group will not receive any biomaterial in the post extraction socket
Alveolar ridge preservationExperimentalIn the group assigned to receive socket preservation, particulate deproteinizied bovine bone mineral (Bio-oss, Geistlich biomaterials) mixed with a gel containing hyaluronic acid and polynucleotides (Regenfast, Mastelli) will be placed in the socket without overfilling it and the socket will be sealed with a porcine collagen matrix (Mucograft seal, Geistlich), Any remaining PNHA gel will be placed at the entrance of the socket and on the surrounding gingival tissue
Receives: Device: regeneration of post extraction socket with biomaterials

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in alveolar ridge width at 4 months post extraction between study groups

    This is a superiority outcome evaluating horizontal ridge width changes at four months post-extraction between test and contro group with the help of a CBCT scan.

    Measured: 4 months after tooth extraction (visit 6)

Secondary outcomes (12)
  1. quality of newly formed bone

    to qualitatively assess socket healing and the maturity of the newly formed bone when DBBM combined with a PNHA and covered by a collagen matrix is employed for alveolar ridge preservation as compared to unassisted healing . A bone core biopsy will be taken at 4 months in both groups and the percentage of connective tissue, woven bone and mineralised bone calculated

    Measured: 4 months post extraction (visit 6)

  2. 3D volume changes

    to assess 3D volume changes in soft and hard tissues at 4 and 12 months post extraction (this will be performed after digitally superimposing DICOM and STL files and in a selected region of interest) in the test and control groups

    Measured: 4 months post extraction (visit 6)

  3. changes in protein expression

    to assess and compare the expression of proteins and signalling pathways in the wound exudate at early healing stages. This will be done through full proteomic analysis via mass spectrometry of the wound exudate

    Measured: 3, 7 and 14 days post extraction (Visit 3, 4, 5)

  4. Profilometric changes

    to assess profilometric changes in the alveolar ridge via superimposition of intra oral scans of test and control groups

    Measured: 3, 7, 14 days and at 4 months post extraction (visit 3, 4, 5)

  5. Change in post operative discomfort

    to assess changes in patient post-operative discomfort, interference with daily activities and oedema and clinician-reported post-operative oedema/swelling via visual analogue scale (VAS) scale going from 0 (no effect) to 10 (maximum negative effect)

    Measured: 3, 7 and 14 days after extraction (visit 3, 4, 5)

  6. Change in Landry healing index

    to assess changes in soft tissue healing index of Landry (qualitative index measured with a visual scale) in the test and control groups

    Measured: 3, 7 and 14 days after extraction (Visit 3, 4, 5)

  7. Changes in keratinized tissue

    to assess changes in keratinized tissue (KT) height (measured in mm) in the area of the extraction (with the help of a periodontal probe) in the test and control groups

    Measured: 4 months post extraction (Visit 6) and at study termination 12 months post loading (Visit 10);

  8. Qualitative assessment of post-operative need for medications

    To record self-reported dosage and type of medications taken by the patients to control post operative pain in the test and control groups

    Measured: Starting after extraction (visit 2) and until 14 days post extraction (Visit 3, 4, 5)

  9. Possibility to prosthetically place an implant

    To qualitatively describe the ability or not to place the implant in a prosthetically guided implant position with the endosteal portion of the implant completely in bone with more than 1-1.5 mm thickness on the buccal and oral aspect (Tonetti et al., 2023) (i.e. need for regeneration) at implant placement

    Measured: implant placement (Visit 7 - within 5 months from tooth extraction)

  10. Peri-implant radiographic bone level changes

    To assess on peri-apical x-rays the changes in peri-implant bone levels (distance between bone crest and implant shoulder) in the 2 groups

    Measured: at implant loading (visit 9 - within 5 months from implant placement) and at the end of the study (12 months post loading - visit 10)

  11. Participants' satisfaction with treatment

    To qualitatively report participants' satisfaction via visual analogue scale (VAS) scale going from 0 (worse) to 10 (maximum positive effect)

    Measured: at the end of the study, 12 months post loading (Visit 10)

  12. Implant torque

    To qualitatively report implant torque, which is assessed with a torque wrench after surgically placing the implant and is measured in N/cm

    Measured: Implant placement (visit 7 - within 5 months from tooth extraction)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted1 Aug 2025
  2. Study start9 Jun 2025
  3. Primary completionMar 2028 (estimated)
  4. Study completionMay 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
40 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07099846
Sponsor's protocol ID
P-005
Acronym
P-005
Status last verified
Aug 2025
First submitted
8 May 2025
Last updated
8 Sep 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: All patients' data held will be coded and pseudo-anonymised with an alphanumerical code that will be kept separately from the personal data as name, surname, date and place of birth and sex and stored in a locked cabinet in the PI's office. The only people within the Centro di Odontoiatria who will have access to information that identifies the patients will be people who need to contact them about the research study, and make sure that relevant information about the study is recorded for their care, and to oversee the quality of the study or audit the data collection process. The people who analyse the information will not be able to identify patients and will not be able to find out their name or contact details.

Publications

  • Guizzardi S, Galli C, Govoni P, Boratto R, Cattarini G, Martini D, Belletti S, Scandroglio R. Polydeoxyribonucleotide (PDRN) promotes human osteoblast proliferation: a new proposal for bone tissue repair. Life Sci. 2003 Aug 29;73(15):1973-83. doi: 10.1016/s0024-3205(03)00547-2.

    PubMed 12899922
  • Colangelo MT, Govoni P, Belletti S, Squadrito F, Guizzardi S, Galli C. Polynucleotide biogel enhances tissue repair, matrix deposition and organization. J Biol Regul Homeost Agents. 2021 Jan-Feb;35(1):355-362. doi: 10.23812/20-320-L. No abstract available.

    PubMed 33480222
  • Avila-Ortiz G, Chambrone L, Vignoletti F. Effect of alveolar ridge preservation interventions following tooth extraction: A systematic review and meta-analysis. J Clin Periodontol. 2019 Jun;46 Suppl 21:195-223. doi: 10.1111/jcpe.13057.

    PubMed 30623987

Questions about this trial

What is this clinical trial studying?

A study testing regeneration of post extraction socket with biomaterials in people with Socket Preservation and Implant-supported Single Crowns, run by University of Parma at 2 sites in Italy.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 8 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in Italy. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Elena Calciolari, DDS, MS, PhD (+390521903640, elena.calciolari@unipr.it), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in alveolar ridge width at 4 months post extraction between study groups (time frame: 4 months after tooth extraction (visit 6)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07099846, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 8 Sep 2025.

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