Regeneration of Pulp-Dentin Development in Teeth With Necrotic Pulps and Immature Roots

• ClinicalTrials.gov Identifier: NCT01976065
• Recruitment Status: Completed
• First Posted: November 5, 2013
• Last Update Posted: September 7, 2023
• Sponsor: Kenneth Hargreaves
• Collaborators: University of Maryland, Baltimore; Loma Linda University; University of North Carolina; American Association of Endodontists
• Information provided by (Responsible Party): Kenneth Hargreaves, The University of Texas Health Science Center at San Antonio

Study Description

Brief Summary:

This multi-center exploratory clinical trial is a randomized trial designed to test whether a regenerative endodontic procedure using tissue engineering principles (REGENDO), or a revascularization (REVASC) endodontic procedure, in comparison to standard apexification treatment using a mineral trioxide aggregate barrier (apexification; APEX), produces a significantly better composite clinical outcome for the treatment of immature permanent teeth with pulpal necrosis.

Condition or disease	Intervention/treatment	Phase
Pulp Necrosis; Regeneration	Drug: Triple Antibiotic Paste; Other: Standard Treatment	Phase 1

Detailed Description:

This is a multi-center randomized clinical trial designed to test whether a regenerative endodontic procedure using tissue engineering principles (REGENDO), or a revascularization (REVASC) endodontic procedure, when compared to the standard apexification treatment using mineral trioxide aggregate barrier-MTA apexification (APEX), produces a significantly better composite clinical outcome for the treatment of immature permanent teeth with pulpal necrosis. This study will use an antibiotic mixture called Triple Antibiotic Paste (TAP), consisting of ciprofloxacin, metronidazole and minocycline, in the tooth for disinfection of the root canal in study arms REGENDO and REVASC. The FDA has issued an Investigational New Drug (IND) number allowing use of the triple antibiotic mixture in this trial. Other dental materials used in this study have already been FDA approved for use in humans to provide a matrix for the promotion of tissue growth in the root canal space. The study will also attempt to identify the type of bacteria within the root canal space and surrounding tissues by analyzing a small sample collected on a cotton-tip applicator. This clinical trial hopes to determine which of the three treatment methods helps the tooth to grow stronger and survive for at least two years after treatment.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 125 participants
• Allocation: Randomized
• Intervention Model: Factorial Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: Regeneration of Pulp-Dentin Development in Teeth With Necrotic Pulps and Immature Roots
• Actual Study Start Date: September 2014
• Actual Primary Completion Date: September 24, 2018
• Actual Study Completion Date: September 24, 2018

Arms and Interventions

Arm	Intervention/treatment
Mineral Trioxide Aggregate (MTA); Standard Treatment group consisting of placement of Mineral Trioxide Aggregate (MTA), an FDA approved dental material at the end of an immature root followed by a composite restoration (crown).	Other: Standard Treatment; Standard Treatment no use of study drug; Other Name: No use of study drug
Experimental: Revascularization Treatment (REVASC); Consists of standard treatment procedure PLUS disinfection of the canal space with Triple Antibiotic Paste study medication followed by placement of Collaplug, an FDA approved material to help promote clotting. A composite restoration in then placed.	Drug: Triple Antibiotic Paste; USP antibiotic drugs mixed at a 1:1:1 ratio into a powder that is mixed with sterile saline to a paste-like consistency; Other Name: Ciprofloxacin, Metronidazole, & Minocycline
Experimental: Regeneration Treatment (REGENDO); Consists of standard treatment procedure PLUS Triple Antibiotic Paste study medication PLUS use of Emdogain, an FDA approved medication used in an FDA approved manner, that is a growth factor to help surrounding tissues to grow together and heal.	Drug: Triple Antibiotic Paste; USP antibiotic drugs mixed at a 1:1:1 ratio into a powder that is mixed with sterile saline to a paste-like consistency; Other Name: Ciprofloxacin, Metronidazole, & Minocycline

Outcome Measures

Primary Outcome Measures :

1. Tooth Survival [ Time Frame: 2 years ]
   1) the growth in hard tissue deposition in the radiographic root area is increased by at least 20%, and 2) the tooth survives to this time point and 3) there is no pain.

Secondary Outcome Measures :

1. Positive pulpal response [ Time Frame: 2 years ]
   Comparison of treatment effects on positive pulpal responses, crown staining, preoperative factors (age, sex, history of trauma), or antimicrobial efficacy and residual intracanal microbial load would influence the primary outcome measure of tooth survival.

Eligibility Criteria

• Ages Eligible for Study: 6 Years to 20 Years (Child, Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: Yes

Criteria

Inclusion Criteria:

• Age 6-20
• Participant has a permanent tooth with a necrotic pulp (as defined by lack of responsiveness to both electrical pulp tests and cold [EndoIce] tests). If the tooth was traumatized, then pulpal necrosis is defined as either: 1) no response to both electrical pulp test and cold [EndoIce] test by three months after trauma, or 2) presence of a periapical lesion, or 3) radiographic evidence of root resorption, or 4) discoloration of the crown.
• Tooth in question is restorable (as defined by Class A or Class B using Samet and Jotkowitz classification) without the need of a stainless steel crown.
• Incomplete (i.e., immature) root development defined by apical foramen ≥1.0mm (each foramina >1.0mm for multi-rooted teeth).
• At least 5 mm of root development (CEJ to radiographic apex).
• Willing and able to provide informed assent/consent.
• Legal guardian willing and able to provide informed consent.

Exclusion Criteria:

• No access to telephone for study contacts.
• Unable to comprehend study materials in English or Spanish.
• Subject not available for follow up at 12 or 24 months.
• Previous allergic response to ciprofloxacin, metronidazole or minocycline or any materials used in the study.
• History of systemic diseases with altered immune function including diabetes, immunodeficiency, leukemia, Addison's or Cushing's disease.
• History of taking immunosuppressants or chemotherapeutic agents including glucocorticoids in the past 3 months.
• Clinical or radiographic evidence of root fracture or alveolar fracture.
• Tooth in question received prior endodontic obturation.
• Tooth in question has class III mobility or dens invaginatus.
• Tooth in question has a history of avulsion with extra-oral dry time longer than 1 hour.
• Clinical judgement (with documentation of the reason)
• Radiographic or clinical identification of ankylosis (replacement resorption) or inflammatory (infection-related) root resorption.

Contacts and Locations

Locations

United States, California

Loma Linda University

Loma Linda, California, United States, 92350

United States, Maryland

University of Maryland

Baltimore, Maryland, United States, 21201

United States, North Carolina

University of North Carolina

Chapel Hill, North Carolina, United States, 27599

United States, Texas

University of Texas Health Science Center

San Antonio, Texas, United States, 78229

Sponsors and Collaborators

Kenneth Hargreaves

University of Maryland, Baltimore

Loma Linda University

University of North Carolina

American Association of Endodontists

Investigators

• Study Chair: Kenneth Hargreaves, DDS, PhD; University of Texas

More Information

• Responsible Party: Kenneth Hargreaves, Chair, Dept. of Endodontics, UTHSCSA, The University of Texas Health Science Center at San Antonio
• ClinicalTrials.gov Identifier: NCT01976065
• Other Study ID Numbers: HSC20130467H
• First Posted: November 5, 2013
• Last Update Posted: September 7, 2023
• Last Verified: September 2023

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: No
• Plan Description: No plan to share data at this time.

Keywords provided by Kenneth Hargreaves, The University of Texas Health Science Center at San Antonio:

Necrotic tooth pulp; Immature permanent teeth; Regeneration

Additional relevant MeSH terms:

Dental Pulp Necrosis; Dental Pulp Diseases; Necrosis; Pathologic Processes; Tooth Diseases; Stomatognathic Diseases; Anti-Bacterial Agents; Metronidazole; Ciprofloxacin; Minocycline; Anti-Infective Agents; Antiprotozoal Agents; Antiparasitic Agents; Topoisomerase II Inhibitors; Topoisomerase Inhibitors; Enzyme Inhibitors; Molecular Mechanisms of Pharmacological Action; Antineoplastic Agents; Cytochrome P-450 CYP1A2 Inhibitors; Cytochrome P-450 Enzyme Inhibitors