Evaluation of NIPSA Using Alloplastic Bone Graft and Cross-Linked Hyaluronic Acid in theTreatment of Intrabony Defects (RCT)

August 1, 2026 updated by: MOHAMMED BANDAR MOHAMMED ALODIANI, Mansoura University

Evaluation of Non-Incised Papillae Surgical Approach Using Alloplastic Bone Graft and Cross-Linked Hyaluronic Acid in the Treatment of Intrabony Defects (A Randomized Controlled Clinical Trial)

Sixty patients will be selected from the outpatient clinic in the Oral Medicine and Periodontology Department, Faculty of Dentistry, Mansoura University, Egypt, according to preoperative clinical and radiographic data that will be used to evaluate the bone destruction pattern.

Study Overview

Detailed Description

Periodontitis comprises a group of diseases that are inflammatory in origin and generally affect the connective tissue attachment and the teeth- supporting bone. It results from interactions between periodontal microflora and the host defense response. If left untreated, periodontitis may progress to tooth mobility and eventual tooth loss, which can adversely affect oral function and esthetics, thereby influencing patients' daily activities, social behavior and overall quality of life. The main goal of comprehensive periodontal treatment is to eliminate inflammation and prevent further destruction of the periodontium, as well as to achieve a sustainable condition in the long term. Over the past decades, significant efforts have been made to develop both materials and surgical techniques that can predictably contribute to periodontal regeneration. Among the various periodontal defects associated with periodontitis, intraosseous defects represent one of the most challenging clinical conditions due to their complex morphology and limited potential for spontaneous healing, thereby necessitating a regenerative therapeutic approach. The morphology of the intraosseous defects must be carefully considered when selecting an appropriate regenerative approach. Intrabony defect morphology is commonly classified based on the number of remaining bony walls (one-wall, two-wall, or three-wall defects, or combined configurations). Defect morphology plays a critical role in periodontal regeneration by influencing the availability of essential cellular and vascular elements. Additionally, the remaining bony walls contribute to clot stability and space maintenance, both of which are essential for successful regenerative outcomes. Deep and narrow three-wall intrabony defects provide a favorable spatial architecture and are therefore associated with the highest potential for predictable periodontal regeneration. The regeneration of intrabony defects remains a significant clinical challenge in periodontal therapy. Consequently, numerous regenerative techniques and a wide range of biomaterials have been developed to enhance biological processes and improve both the quality and quantity of newly formed periodontal tissues. Regenerative procedures include the use of bone grafts, barrier membranes, biological mediators, or combinations thereof, with the aim of facilitating true periodontal regeneration, which is histologically characterized by the formation of new root cementum, periodontal ligament, and alveolar bone. The Non-Incised Papillae Surgical Approach (NIPSA), introduced in 2018 by Moreno Rodríguez and Caffesse, is a microsurgical technique designed for the treatment of isolated, deep periodontal defects. The technique is based on a single buccal horizontal incision placed apically to the periodontal defect,while preserving the marginal and lingual tissues intact, in order to create optimal conditions for periodontal regeneration and soft-tissue preservation. .

EthOss is a bioactive synthetic alloplastic bone graft composed of 65% beta-tricalcium phosphate and 35% calcium sulfate that can be easily manipulated and adapted to intrabony defects after mixing with saline or the patient's own plasma to provide a scaffold for newly formed bones.

Hyaluronic acid has specific physical and biochemical properties in normal tissues that make it an ideal structural compound. It is detectable in all vertebrate animals and within bacterial biofilms.There is no antigenic specificity for species or tissues; thus, hyaluronic acid has a low potential for allergic or immunogenic reactions. Cross-linked hyaluronic acid represents a chemically modified form of native hyaluronic acid in which individual polymer chains are covalently interconnected, forming a three-dimensional network. This structural modification significantly enhances the mechanical stability of the material, increases its resistance to enzymatic degradation, and prolongs its persistence within the tissues compared with non-cross-linked hyaluronic acid. Consequently, cross-linked hyaluronic acid demonstrates prolonged bioavailability and sustained biological activity, making it particularly suitable for periodontal and soft-tissue regenerative procedures.Minimally invasive surgical techniques have gained increasing attention in periodontal regenerative therapy, particularly for the management of intrabony defects. The Non-Incised Papillae Surgical Approach (NIPSA) has been proposed as a treatment modality aimed at preserving soft tissues and enhancing regenerative outcomes. NIPSA involves a single incision in the mucosa apical to the bone margin delimiting the periodontal defect, maintaining the marginal and interproximal soft-tissue architecture intact. This preserved tissue acts as a "dome," protecting the regenerative space within the vertical component of the defect and preventing collapse of the interproximal soft tissues into the underlying defect. Clinical studies evaluating NIPSA have demonstrated favorable outcomes, including periodontal pocket resolution, clinical attachment level (CAL) gain, and enhanced soft-tissue preservation, with particular improvements in interproximal soft-tissue stability. However, since bone substitute materials were used in conjunction with NIPSA in all reported studies, it remains difficult to isolate the specific contribution of the bone substitutes in supporting soft tissues, preventing their collapse, and enhancing papilla preservation. In addition, regenerative biomaterials such as alloplastic bone substitutes and cross-linked hyaluronic acid have been used with NIPSA to support periodontal wound healing and tissue regeneration. However, clinical evidence, comparing the regenerative effectiveness of these biomaterials when used individually or in combination with NIPSA remains limited. Therefore, further randomized clinical and radiographic studies are required to evaluate and compare their effectiveness in the treatment of periodontal intrabony defects.

Study Type

Interventional

Enrollment (Estimated)

60

Phase

  • Phase 2
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Age range: 35 to 65 years old.
  2. Patients diagnosed with stage III. Periodontitis
  3. Presence of isolated intrabony defect with PPD ≥ 6 mm, CAL ≥ 6 mm
  4. Intrabony defect depth ≥3 mm.
  5. Contained an intrabony defect, 3-wall intrabony defect.
  6. No periodontal treatment has been administered in the previous six months.
  7. Full-mouth plaque score ≤ 10%.
  8. Full-mouth bleeding score ≤ 10%. -

Exclusion Criteria:

  1. Smokers ≥ 10 cigarettes per day
  2. Patient with systemic disease.
  3. Pregnant or lactating patients.
  4. Patient who has traumatic occlusion.
  5. Noncompliant patient.
  6. Patient with multi-rooted teeth with class II & III furcation involvement.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Non-Incised Papillae Surgical Approach (NIPSA) with Alloplast bone graft (EthOss bone graft)
Twenty participants will receive the Non-Incised Papillae Surgical Approach (NIPSA) with Alloplast bone graft (EthOss bone graft) for the treatment of periodontal intrabony defects. Clinical and radiographic outcomes will be evaluated during follow-up.
A fully synthetic bone graft material composed of beta-tricalcium phosphate and calcium sulfate used to promote bone regeneration in periodontal intrabony defects.
A minimally invasive periodontal regenerative surgical technique that preserves the interdental papilla and marginal soft tissues while providing access to the intrabony defect through an apical incision.
Active Comparator: NIPSA with Cross-linked hyaluronic acid
Twenty participants will receive the Non-Incised Papillae Surgical Approach (NIPSA) with cross-linked hyaluronic acid for periodontal treatment . Clinical and radiographic outcomes will be evaluated during follow-up.
A minimally invasive periodontal regenerative surgical technique that preserves the interdental papilla and marginal soft tissues while providing access to the intrabony defect through an apical incision.
Cross-linked hyaluronic acid applied to enhance periodontal wound healing and support regenerative outcomes.
Active Comparator: NIPSA with alloplastic bone graft + Cross-linked hyaluronic acid
Twenty participants will receive the Non-Incised Papillae Surgical Approach (NIPSA) with a combination of alloplast bone graft and cross-linked hyaluronic acid. The combined regenerative approach will be compared with the two active comparator groups.
A fully synthetic bone graft material composed of beta-tricalcium phosphate and calcium sulfate used to promote bone regeneration in periodontal intrabony defects.
A minimally invasive periodontal regenerative surgical technique that preserves the interdental papilla and marginal soft tissues while providing access to the intrabony defect through an apical incision.
Cross-linked hyaluronic acid applied to enhance periodontal wound healing and support regenerative outcomes.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
The primary outcomes of this study are: Bone Fill.
Time Frame: 6 months
Bone Fill.
6 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
The Secondary outcomes of this study are: 1. Reduction in Periodontal pocket depth (PPD). 2. Changes in clinical attachment loss (CAL).
Time Frame: 6 months
  1. Decrease in Periodontal pocket depth (PPD).
  2. Changes in clinical attachment loss (CAL)
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Mohammed B Alodiani, Faculty of Dentistry, Mansoura University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

August 1, 2026

Primary Completion (Estimated)

February 1, 2027

Study Completion (Estimated)

March 1, 2027

Study Registration Dates

First Submitted

July 27, 2026

First Submitted That Met QC Criteria

July 27, 2026

First Posted (Actual)

July 30, 2026

Study Record Updates

Last Update Posted (Actual)

August 4, 2026

Last Update Submitted That Met QC Criteria

August 1, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • MS.26.01.141

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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