Vital Pulp Therapy: Redefining the Future of Conservative Dentistry

ISBN: 978-93-7143-612-0 41 Chapter - 2 Vital Pulp Therapy: Redefining the Future of Conservative Dentistry Sufia Parveen Junior Resident, Department of Conservative Dentistry and Endodontics, Buddha Institute of Dental Sciences and Hospital, Patna, Bihar Navin Mishra Additional Professor and Head, Department of Conservative Dentistry and Endodontics, Post Graduate Institute of Dental Education & Research (PGIDER), Indira Gandhi Institute of Medical Sciences, Patna, Bihar Md. Jawed Akhtar Additional Professor, Department of Anatomy, Indira Gandhi Institute of Medical Sciences, Patna, Bihar Corresponding Author Navin Mishra Additional Professor and Head, Department of Conservative Dentistry and Endodontics, Post Graduate Institute of Dental Education & Research (PGIDER), Indira Gandhi Institute of Medical Sciences, Patna, Bihar (India). Email ID: [email protected] Vital Pulp Therapy: Redefining the Future of Conservative 42 ABSTRACT: Vital pulp therapy (VPT) comprises a range of conservative treatment modalities aimed at preserving the vitality of the compromised dental pulp in primary and permanent teeth. The pulp is essential for dentin formation, immune defence, and sensory functions, making its preservation critical for maintaining long-term tooth health. This chapter explores the principles, indications, and contraindications of VPT, along with its main techniques, indirect and direct pulp capping, partial pulpotomy, and full pulpotomy. It emphasizes the biological basis of pulpal healing, the criteria for success, and the clinical outcomes achieved with contemporary bioactive materials such as mineral trioxide aggregate (MTA) and Biodentine. In addition, recent developments in regenerative therapies, nanotechnology, and molecular biology are discussed, highlighting their potential to move the field beyond repair toward true tissue regeneration. By offering a less invasive, more cost-effective, and time-efficient approach while preserving the tooth’s natural defence and sensory functions, VPT has emerged as a biologically driven alternative to conventional root canal therapy in both immature and mature permanent teeth. Key Words: Biodentine; Calcium Derivative; Calcium-enriched Mixture; Calcium Silicate Cement; Dental Pulp Capping; Endodontics; Irreversible Pulpitis; Mineral Trioxide Aggregate; Partial Pulpectomy; Pulpotomy. Sufia Parveen 43 1. Introduction The term “vital pulp therapy” was originally introduced by McDonald in 1956, who advocated its application in primary teeth [1]. The dental pulp is a specialized connective tissue that plays a crucial role in dentin formation, immune defence, proprioception, and maintenance of tooth vitality. Preservation of pulp health is central to the philosophy of conservative dentistry and endodontics. Vital Pulp Therapy (VPT) refers to clinical procedures designed to preserve and maintain the health of dental pulp tissue that has been exposed or is at risk of exposure due to caries, trauma, or restorative procedures. With the development of advanced biomaterials and a better understanding of pulp biology, VPT has become an increasingly reliable alternative to root canal therapy in carefully selected cases [2]. 2. Rationale and Objectives of Vital Pulp Therapy The primary goals of VPT are [3]: • Preservation of the vitality of the remaining pulp tissue. • Elimination or prevention of inflammation by sealing against bacterial ingress. • Stimulation of reparative dentinogenesis through odontoblasts or odontoblast-like cells. • Maintenance of root development in immature teeth (apexogenesis). • Reduction of treatment invasiveness compared to pulpectomy or root canal therapy. Vital Pulp Therapy: Redefining the Future of Conservative 44 Figure 1: Objectives of VPT 3. Indications Vital pulp therapy is indicated in cases where the pulp is still healthy or only minimally inflamed. Common situations include: • Teeth presenting with reversible pulpitis. • Immature permanent teeth with vital pulp following carious or traumatic exposure. • Mechanical or accidental pulp exposures in otherwise sound teeth. Sufia Parveen 45 • Deep carious lesions where pulp exposure is anticipated but inflammation remains localized. 4. Contraindications VPT is contraindicated when the pulp is irreversibly damaged or when adequate restoration is not feasible. Exclusion criteria include: • Clinical signs of irreversible pulpitis, such as lingering or nocturnal pain. • Pulpal necrosis or loss of vitality. • Radiographic evidence of apical or furcal pathology. • Non-restorable crown structure or advanced periodontal breakdown. Table 1: Indications and Contraindications of Vital Pulp Therapy Indications Contraindications • Reversible pulpitis • Irreversible pulpitis • Recent traumatic or mechanical pulp exposure • Necrotic pulp • Immature permanent teeth with vital pulp • Presence of periapical pathology • Restorable crown structure • Non-restorable tooth structure • Controlled carious exposure • Advanced periodontal disease Vital Pulp Therapy: Redefining the Future of Conservative 46 5. Types of Vital Pulp Therapy: Vital pulp therapy (VPT) includes biologically based treatments designed to maintain pulp vitality when it is at risk or minimally exposed due to caries, trauma, or operative procedures. The selection of the type of VPT depends on the extent of pulpal involvement, tooth maturity, and clinical situation. The major types are described below: A. Indirect Pulp Capping Definition Indirect pulp capping (IPC) involves the placement of a biocompatible material over a thin layer of affected but not infected dentin in close proximity to the pulp, without actual pulp exposure [4]. The remaining dentin serves as a natural protective barrier. Objective • To avoid pulp exposure during caries excavation. • To promote remineralization of the affected dentin and arrest further caries progression. • To maintain pulp vitality by encouraging tertiary dentin deposition. Materials Used • Calcium hydroxide (traditional standard, strong antibacterial effect, but prone to dissolution). • Mineral Trioxide Aggregate (MTA) (bioactive, excellent sealing, stimulates dentinogenesis). • Biodentine (shorter setting time, favorable handling, strong bioactivity). Sufia Parveen 47 • Other calcium silicate-based cements (e.g., bioceramic materials). B. Direct Pulp Capping Definition Direct pulp capping (DPC) refers to the placement of a protective bioactive dressing directly over a small pulp exposure, followed by a permanent restoration [6]. Indications • Mechanical or traumatic exposures (e.g. during cavity preparation or trauma). • Carious exposures in teeth with reversible pulpitis and healthy periapical status. • Most suitable in young permanent teeth with good healing potential. Materials Used • Calcium hydroxide (historically used but limited due to dissolution and imperfect seal). • MTA and Biodentine (preferred modern materials due to better sealing, bioactivity, and predictable dentin bridge formation). C. Partial Pulpotomy (Cvek’s Pulpotomy) Definition Partial pulpotomy, also called Cvek’s pulpotomy, involves the removal of 1–3 mm of inflamed coronal pulp tissue beneath an exposure site until healthy, non-inflamed pulp is reached. A biocompatible material is then placed to cover the exposed pulp [7]. Vital Pulp Therapy: Redefining the Future of Conservative 48 Indications • Traumatic pulp exposures in young permanent teeth. • Carious pulp exposures where inflammation is localized to the coronal pulp. • Situations where preservation of radicular pulp is possible. Materials Used • MTA (gold standard, high biocompatibility, superior success). • Biodentine (similar to MTA but with improved handling and shorter setting time). • Calcium hydroxide (less preferred due to limitations in long-term sealing). Advantages • Very high success rates, particularly in immature permanent teeth. • Allows continued root development and apexogenesis, preserving long-term tooth strength. • Avoids the need for full pulpectomy when inflammation is localized. D. Full Coronal Pulpotomy Definition Full pulpotomy refers to the removal of the entire coronal pulp tissue, leaving only the healthy radicular pulp intact. A bioactive material is then placed over the pulp stumps before definitive restoration [5]. Sufia Parveen 49 Indications • Extensive carious exposures where coronal pulp tissue is irreversibly inflamed, but radicular pulp remains healthy. • Especially beneficial in immature permanent teeth where root development is incomplete. • Situations where complete root canal treatment is not required or may compromise long-term vitality. Materials Used • MTA (well-documented success in pulpotomies). • Biodentine (faster setting and user-friendly). • Calcium-Enriched Mixture (CEM) cement (bioactive, promising clinical results). Table 2: Classification of Vital Pulp Therapy Procedure Definition Indication Outcome Goal Indirect Pulp Capping Placement of a protective material over a thin layer of demineraliz ed dentin close to the pulp but without Deep caries, reversible pulpitis. Healing & tertiary dentin formation. Vital Pulp Therapy: Redefining the Future of Conservative 56 9. Clinical Significance in Conservative Dentistry and Endodontics Vital pulp therapy (VPT) has emerged as a cornerstone in modern conservative dentistry and endodontics. The clinical philosophy has shifted from the traditional “extirpate and obturate” model to a more biological and tissue-preserving approach. Instead of automatically resorting to root canal treatment for pulpal involvement, clinicians now prioritize the preservation of pulp vitality whenever feasible. A. Biological and Conservative Alternative to Root Canal Therapy • VPT provides a less invasive treatment option compared to conventional root canal therapy (RCT). • By retaining viable pulp tissue, it preserves the tooth’s natural biological functions, which root canal–treated teeth lose. • Avoiding unnecessary RCT is consistent with the principles of minimally invasive dentistry and helps in maintaining the tooth’s long-term structural integrity. B. Reduction in Treatment Time and Cost • VPT procedures are simpler and faster to perform compared to full RCT. • They generally require fewer clinical visits and minimal instrumentation. • This translates to a lower financial burden for patients while maintaining therapeutic efficacy. Sufia Parveen 57 • The reduced chair time also makes the procedure particularly suitable for children, anxious patients, and individuals with limited access to care. C. Preservation of Tooth’s Natural Defence and Sensory Functions • The dental pulp is not just a vascularized tissue; it plays a critical role in the tooth’s defence. • Immunological defence: Pulp tissue actively responds to bacterial invasion by mobilizing immune cells. • Sensory function: The pulp retains sensory innervation, enabling patients to detect thermal, mechanical, and chemical stimuli, which serve as early warning signals against further insult. • Retaining these functions maintains the tooth as a living, dynamic structure rather than a biologically inert entity. D. Significance in Paediatric and Adolescent Patients • In children and adolescents, pulp vitality is crucial for apexogenesis: the continued growth and maturation of root structures. • VPT procedures, such as partial or full pulpotomy, allow immature permanent teeth with pulp involvement to complete their root development and apical closure, ensuring long-term strength and stability. Vital Pulp Therapy: Redefining the Future of Conservative 58 • This is particularly important in trauma cases, where young permanent teeth are at high risk of pulpal injury. • By avoiding early root canal treatment, clinicians preserve the natural biology needed for complete root formation. E. Success in Mature Teeth with Proper Protocols • Earlier, VPT was mainly advocated for immature teeth. With the advent of modern bioactive materials (e.g., MTA, Biodentine, calcium silicate-based cements), VPT has become a viable option even in mature permanent teeth. • Success depends on three critical factors: a. Accurate diagnosis: Differentiating reversible from irreversible pulpitis. b. Strict aseptic technique: Preventing microbial contamination during the procedure. c. Use of bioactive materials: Materials that promote dentin bridge formation, pulpal healing, and a bacteria-tight seal. • When these conditions are fulfilled, VPT can achieve long-term success comparable to RCT, while being less invasive. 10. Conclusion Vital pulp therapy is a cornerstone of conservative dentistry and endodontics, aiming at preserving pulp vitality rather than removing it. With modern bioactive materials such as MTA and Sufia Parveen 59 Biodentine, the prognosis of VPT has improved significantly, shifting the paradigm toward pulp preservation whenever possible. Correct case selection, strict aseptic technique, and a well-sealed restoration remain the determining factors for success. References: 1. McDonald RE. Diagnostic aids and vital pulp therapy for deciduous teeth. J Am Dent Assoc. 1956;53(1):14-22. 2. Asgary S, Nosrat A. Vital Pulp Therapy: Evidence-Based Techniques and Outcomes. Iran Endod J. 2025;20(1):e2. doi: 10.22037/iej.v20i1.47141. Epub 2025 Jan 1. 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