Direct Pulp Capping Material Research Articles

EFFECT OF GALAM LEAF EXTRACT AND TRI-CALCIUM SILICATE CEMENT ON NEUTROPHIL CELLS IN WISTAR RAT PULP

Background: Pulp capping is a method of sealing the pulp chamber in teeth with cavities that extend to the pulp. Direct pulp capping involves applying a material directly onto the exposed pulp tissue. Tri-calcium silicate cement (Ca3SiO5) is commonly used due to its nanoparticle mineral composition, but it can cause continued inflammation. Galam leaf (Melaleuca cajuputi) is known for its anti-inflammatory properties, owing to secondary metabolites like alkaloids, flavonoids, polyphenols, and saponins, potentially compensating for the drawbacks of tri-calcium silicate cement. Purpose: To determine the effect of combining Galam leaf extract (Melaleuca cajuputi subsp. Cumingiana (Turz) Barlow) with tri-calcium silicate cement as a direct pulp capping material on neutrophil cell count in the pulp of Wistar rats (Rattus norvegicus). Methods: This pure experimental study used a posttest-only control design. Thirty-six Wistar rats were divided into nine groups: one received a combination of 100% Galam leaf extract and tri-calcium silicate cement; one positive control group received tri-calcium silicate cement alone; and one negative control group received direct placement with glass ionomer cement (GIC). The neutrophil cell count was assessed on days 1, 2, and 3. Results: Two-way ANOVA results indicated a significant effect based on treatment and time (p < 0.05). Further analysis with the Post Hoc Bonferroni test (p < 0.05) revealed differences in neutrophil cell counts across nearly all groups on days 1, 2, and 3. Conclusion: The combination of 100% Galam leaf extract and tri-calcium silicate cement significantly reduced neutrophil cell counts compared to both positive and negative control groups on days 1, 2, and 3, indicating anti-inflammatory effect.

Evaluation of Bioceramic putty as a direct pulp capping material in primary molars

Evaluation of Bioceramic putty as a direct pulp capping material in primary molars

Histopathological Evaluation of Human Placental Extract as a Direct Pulp-Capping Material in Dogs' Teeth

Histopathological Evaluation of Human Placental Extract as a Direct Pulp-Capping Material in Dogs' Teeth

Biological evaluation of novel phosphorylated pullulan-based calcium hydroxide formulations as direct pulp capping materials: An invivo study on a rat model.

Calcium hydroxide (CH) has been considered as a direct pulp capping materials (DPC) for the last decades despite having some limitations. Phosphorylate pullulan (PPL) incorporated with CH (CHPPL) is a novel biomaterial that was introduced as a promising DPC material. Thus, the aim of the study was to evaluate the inflammatory response and mineralized tissue formation (MTF) ability of PPL-based CH formulations on rat molars after DPC. This study consisted of six groups: CH with 1% PPL (CHPPL-1); 3% PPL (CHPPL-3); 5% PPL (CHPPL-5); Dycal and NEX MTA Cement (N-MTA) as the positive control, and no capping materials (NC). One hundred twenty maxillary first molar cavities were prepared on Wistar rats. After capping, all the cavities were restored with 4-META/MMA-TBB resin and pulpal responses were evaluated at days 1, 7, and 28. Kruskal-Wallis followed by Mann-Whitney U-test was performed with a significance level of 0.05. Immunohistochemical expression of IL-6, Nestin, and DMP-1 was observed. At day 1, CHPPL-1, N-MTA, and Dycal exhibited no to mild inflammation, whilst CHPPL-3, CHPPL-5, and NC showed mild to moderate inflammation, and the results were significantly different (p < .05). At day 7, mild to moderate inflammation was observed in CHPPL-1, N-MTA, and Dycal, whereas CHPPL-3, CHPPL-5, and NC exhibited moderate to severe inflammation. Significant differences were observed between CHPPL-1 and N-MTA with NC (p < .05), CHPPL-1 and CHPPL-3 with CHPPL-5 and Dycal (p < .05), and CHPPL-3 with N-MTA (p < .05). A thin layer of mineralized tissue formation (MTF) was observed in all groups. At day 28, CHPPL-1, Dycal, and N-MTA showed no to mild inflammation, whilst CHPPL-3, CHPPL-5, and NC exhibited mild to severe inflammation, and statistically significant difference was detected (p < .05). CHPPL-1, Dycal, and N-MTA exhibited continuous MTF, whilst CHPPL-3, CHPPL-5, and NC had thicker and interrupted MTF. Significant differences were observed between CHPPL-1, CHPPL-3, and N-MTA with NC group (p < .05). Variable expressions of IL-6, Nestin, and DMP-1 indicated differences in the materials' impact on odontoblast-like cell formation and tissue mineralization. These findings suggest that CHPPL-1 has the potential to minimize pulpal inflammation and promote MTF and had similar efficacy as MTA cement.

Comparative Evaluation of the Efficacy of TheraCal LC, Mineral Trioxide Aggregate, and Biodentine As Direct Pulp Capping Materials in Patients With Pulpal Exposure in Posterior Teeth: A Triple-Blinded Randomized Parallel Group Clinical Trial.

Background The aim was to evaluate and compare the efficacy of TheraCal LC, mineral trioxide aggregate (MTA), and Biodentine as direct pulp capping (DPC) materials in patients with pulpal exposure in the posterior teeth. Methodology A total of 54 samples were assessed for eligibility. Out of this, 12 teeth samples failed to meet the inclusion criteria. Finally, 42 teeth samples were selected whichwere randomly distributed into three groups (n = 14). Groups A, B, and C received the intervention of MTA, Biodentine, and TheraCal LC, respectively. The assessment was performed clinically to check for postoperative pain, tenderness, and neural sensibility, and the radiographs were used to check the presence of periodontal ligament (PDL) space widening, calcified barrier, and periapical radiolucency at the follow-up of 21 days, three months, and 12 months. The outcomes depended on the clinicaland radiographicsuccess rates recorded at 12 months of recall. Results Overall successful outcome of DPC clinically at different periods was 97.61% at three months and 88.09% at 12 months. A Chi-square test was used which showed that the difference was statistically nonsignificant. For groups A, B, and C, the success rate at follow-up came out to be 85.71%, 100%, and 78.57% at 12 months, respectively. The overall radiographic success rate of DPC at different time periods was 83.33% at three months and 88.09% at 12 months. A Chi-square test was used which showed that the difference was statistically nonsignificant. For groups A, B, and C, the success rate at follow-up came out to be 85.71%, 100%, and 78.57% at 12 months, respectively. Conclusion Resin-based calcium-silicate agent (TheraCal LC) showed good efficacy and can be used in practice with the predictability of a good success rate both clinically and radiographically. Thus, TheraCal LC can be utilized as an alternative to MTA or Biodentine in clinical practice, with the predictability of similar successful outcomes in patients with pulpal exposure in the posterior teeth.

Vital pulp therapies versus conventional endodontics for the treatment of mature teeth with pulp inflammation: A systematic review

Introduction: To compare the effectiveness of vital pulp therapies (pulpotomy and direct pulp capping) with that of conventional endodontics for the treatment of mature teeth with pulp inflammation and to analyze which pulp capping material is more effective for the treatment of mature teeth with pulp inflammation. Materials and Methods: A bibliographic search of electronic databases (PUBMED, COCHRANE LIBRARY, SCOPUS, ScienceDirect, and SciELo) was conducted. The inclusion criteria were comparative studies in patients who underwent conventional endodontic and vital pulp therapy in mature teeth with pulp inflammation and comparative studies comparing Mineral Trioxide Aggregate (MTA) versus calcium hydroxide as direct pulp capping materials in mature teeth with pulp inflammation. Risk of bias was assessed using RoB2 or ROBINS-I. Results: Eight clinical trials were included, all of which had a high risk of bias. The data analysis showed that pulpotomy has similar clinical success rates to conventional endodontics. No studies comparing conventional endodontics versus direct pulp capping were found. MTA has better clinical results than calcium hydroxide as a direct pulp capping material. Conclusion: Vital pulp therapies are a valid alternative for the treatment of mature teeth with pulp inflammation. There is a need for more clinical trials with longer follow-up time and which consider other variables related to the characteristics of the patient and the tooth.

A paradigm shift from calcium hydroxide to bioceramics in direct pulp capping: A narrative review.

For many years, calcium hydroxide (CH) was the preferred material for direct pulp capping (DPC), occupying an elevated position. The collapse of this paradigm is due to the emergence of bioceramics with less pulpal inflammation and superior mineralization abilities than CH. The goal of the current article was directed to: (1) review the history of DPC "the idea of an exposed pulp as a hopeless organ has given way to one of healing and optimism," (2) classify the bioceramics in dentistry, and (3) explain and compare the mechanism by which dentin barriers for CH and bioceramics are formed. A comprehensive literature search of the database was conducted using PubMed, Google Scholar, and Scopus utilizing the following terms: Biodentine, calcium hydroxide, calcium aluminate, calcium phosphate, calcium silicate, direct pulp capping, NeoMTA Plus, Quick-Set2, and TotalFill. Reference mining of the selected publications was utilized to discover other studies and strengthen the results. Only works written in English were taken into consideration, and there were no restrictions on the year of publication. Bioceramic materials might be used as an intriguing substitute for CH. Compared to CH, they induced more positive pulpal reactions.

Propolis-enhanced Calcium Hydroxide Combination for Direct Pulp Capping: Impact on Oxidative Stress Markers in Wistar Rat Teeth.

This study explored the effects of propolis extract calcium hydroxide (Ca(OH)2) combination on malondialdehyde and superoxide dismutase expression in dental pulp, aiming to assess its potential as a direct pulp capping material. Thirty male Wistar rats were randomly assigned to three groups. Mandibular molar teeth were prepared using a low-speed round bur. In Group I, no material was applied; in Group II, teeth were treated with Ca(OH)2; and in Group III, teeth were treated with Propolis extract-Ca(OH)2, followed by Cention N filling. Immunohistochemistry was conducted on pulp tissue samples obtained on the third and seventh days post-treatment to assess malondialdehyde and superoxide dismutase expression. Statistical analyses included the Shapiro-Wilk test, Levene test, ANOVA, and Tukey's HSD. The samples treated with propolis extract-Ca(OH)2 combination exhibited significantly lower malondialdehyde expression on both days compared to samples treated with Ca(OH)2 (P<0.05), indicating reduced oxidative stress. Superoxide dismutase expression in the propolis extract-Ca(OH)2 group was higher (P<0.05), suggesting an enhanced antioxidant activity. The control group showed intermediate results. Statistical analyses confirmed significant differences between groups for both malondialdehyde and superoxide dismutase expressions (P<0.05). The study suggests that the propolis extract-Ca(OH)2 combination holds promise for direct pulp capping applications by minimizing oxidative stress and promoting antioxidant defense mechanisms in dental pulp.

Endodontic Applications of Propolis in Primary and Permanent Teeth: A Scoping Review of Clinical Studies.

The use of propolis-based materials within endodontics to promote pulp wound healing or disinfect the root canal system has been a recent focus of scientists and clinicians. This is mainly because of the well-documented antimicrobial, anti-inflammatory, immunomodulatory and wound healing properties of propolis. This scoping review critically appraises the literature on the clinical applications of propolis-based compounds during endodontic therapy of primary and permanent teeth. An electronic literature search was performed in Scopus, PubMed, and Web of Science up to and including October 2023 to identify studies assessing the use of propolis during endodontic therapy of primary and permanent teeth. A combination of relevant MeSh terms and keywords was used. Only human clinical studies written in English were included. The identified manuscripts were screened and assessed for inclusion by two independent authors. Eligible manuscripts were then subjected to critical appraisal and data extraction with the information being summarised according to their clinical application. A total of 26 human clinical studies were identified and included in the analysis. Propolis was investigated for use in the primary and permanent dentitions as a direct pulp capping or pulpotomy material as well as in root canal disinfection and root filling of teeth with non-vital pulps. Overall, the studies reported that the use of propolis was associated with promising outcomes in terms of efficacy to control inflammation, enhance tissue repair, and disinfection of the root canal system. However, a critical appraisal of the studies revealed a range of methodological and reporting deficiencies, resulting in unreliable results and conclusions in terms of the clinical outcomes reported. Although the studies on the use of propolis-based materials in endodontics reported promising clinical outcomes, they had a range of methodological and reporting flaws. Further well-designed and properly reported controlled clinical studies are essential to derive sound evidence-based conclusions on propolis-based materials. Furthermore, guidelines for quality assurance and safe use of propolis-based materials are necessary to enhance their production for commercial use in endodontics.

Reparative Mineralized Tissue Characterization by Different Bioactive Direct Pulp-capping Agents

ABSTRACT The aim of direct pulp caping (DPC) is to support the formation of mineralized tissue and encourage pulp healing by placing a dental biomaterial directly over the exposed pulp. The era of vital pulp therapy has been influenced by the introduction of various pulp-capping materials. Emphasis has shifted from the “doomed” organ concept of an exposed pulp to one of hope and recovery; this comprehensive review thus discusses the ability of different direct pulp-capping materials to form a dentin bridge. Furthermore, this review will discuss the quality and quantity of dentinal bridge formation by different pulp-capping agents.

Marginal adaptation, physicochemical and rheological properties of treated dentin matrix hydrogel as a novel injectable pulp capping material for dentin regeneration

BackgroundTreated dentin matrix hydrogel (TDMH) has been introduced as a novel injectable direct pulp capping material. In this regard, this study aimed to evaluate its marginal adaptation, physicochemical and rheological properties for the development of clinically feasible TDMH.MethodsTDMH was applied to the pulp floor of prepared Class I cavities (n = 5), marginal adaptation was assessed by SEM at 1000 X magnification to detect gap between dentin and filling material. Five syringes were filled with TDMH and placed between the compression plates of a universal testing machine to evaluate injectability and gelation time was also evaluated by test vial inverting method. The microstructures of lyophilized TDMH were observed by SEM. Moreover, TDMH discs (n = 5) were prepared and the water uptake (%) was determined based on the equilibrium swelling theory state of hydrogels. Its solubility was measured after one week by the ISO standard method. Rheological behaviours of TDMH (n = 5) were analysed with a rotational rheometer by computing their complex shear modulus G* and their associated storage modulus (G′) and loss modulus (G′’). Statistical analysis was performed using F test (ANOVA) with repeated measures and Post Hoc Test (p = 0.05).ResultsTDMH presented an overall 92.20 ± 2.95% of continuous margins. It exhibited gelation during the first minute, and injectability mean was 66 ± 0.36%. TDMH showed a highly porous structure, and the pores were interconnected with an average diameter about 5.09 ± 3.17 μm. Swelling equilibrium gradually reached at 6 days up to 377%. The prepared hydrogels and maintained their shape after absorbing over three times their original weight of water. TDMH fulfilled the requirements of ISO 6876, demonstrating a weight loss of 1.98 ± 0.09% and linear viscoelastic behaviour with G` 479.2 ± 12.7 and G`` 230.8 ± 13.8.ConclusionsTDMH provided good marginal adaptation, appropriate physicochemical and viscoelastic properties support its use as a novel direct pulp capping material in future clinical applications.

A comparative study of the biological and histological response of eggshell nanoparticles, hesperidin, and calcium hydroxide as direct pulp capping materials: An in vivo study on rat molars

A comparative study of the biological and histological response of eggshell nanoparticles, hesperidin, and calcium hydroxide as direct pulp capping materials: An in vivo study on rat molars

Success Rate of Direct Pulp Capping with Conventional Procedures Using Ca (OH)2 and Bioactive Tricalcium Silicate Paste vs. Laser-Assisted Procedures (Diode 980 nm, CO2, and Er: YAG)

Direct pulp capping (DPC) is reliable in pulp exposure management. Objective: This study aimed to assess the success rate of DPC materials and different laser protocols. The included procedures were CO2 laser (n = 1147), Er: YAG laser (n = 69), and 980 nm diode laser (n = 124), on the one hand, and Ca (OH)2 (n = 376) and bioactive tricalcium silicate paste, on the other (n = 279). Materials and methods: Data from 1995 DPC cases were included. For laser groups, irradiation was used to coagulate the pulp exposure followed by Ca (OH)2 placement. Data with follow-up at 12, 24, and 36 months post-treatment were included. The irradiation parameters for the CO2 laser were as follows: energy density per pulse of 141 J/cm², 1 W power, 0.3 mm beam diameter, 100 ms pulse duration, and 1 Hz, and a series of five pulses maximum were delivered during 5 s. For the 980 diode lasers: 1.5 W power, continuous wave (CW), 400 μm fiber diameter, contact mode, 190.98 W/cm2 power density, and total delivered energy density of 2387 J/cm2. For the Er: YAG laser: 0.5 W output power, 9.95 J/cm2 energy density, a beam diameter of 0.8 mm, 300 µsec pulse duration, 10 Hz, non-contact mode, irradiation with air without water spray, and an average irradiation time of 8–10 s. Results: At the 3-year follow-up, the success percentages were as follows: CO2 (88.01%) &gt; Ca (OH)2 (75.72%) &gt; diode (70.01%) &gt; Er: YAG (54.55%) &gt; bioactive tricalcium silicate paste (51.1%). The timing of permanent filling (immediate or delayed), patient age, size of pulp exposure, tooth type, and exposure etiology significantly affected the success rate. Patients aged ≤ 35 years presented higher success (70.91%) compared to those ≥ 36 years (61.2%). Immediate permanent fillings increase the success rate (71.41%) compared to delayed permanent fillings (65.93%). Exposure in molars and premolars significantly lowers the success rate (60.3%) compared to canines and incisors (72.1%). Idiopathic pulp exposure presented higher success (72.58%) compared to caries-related causes (63.7%). Conclusion: The highest success rate was in the CO2 laser group followed by the diode and Ca (OH)2, Er: YAG, and bioactive tricalcium silicate material (biodentine) groups. The age factor, filling timing, size of exposure, tooth type, and exposure etiology can significantly affect the success rate of DPC.

Nano eggshell based slurry as a direct pulp capping material: In vitro characterization and histopathological assessment in an experimental animal model.

Pulp vitality is essential for tooth integrity. Following pulp exposure, choosing a suitable pulp capping material is crucial to maintain pulp vitality. However, the reparative dentine bridge created by calcium hydroxide is generally porous and incomplete. To assess the in vitro and in vivo bioactivity of nano eggshell-based slurry (NES), using NES as direct pulp capping material, compared with calcium hydroxide (Ca(OH)2 ) in rabbit animal model. Nano eggshell powder (NE) was characterized for particle morphology, chemical composition, and ion release. In vitro bioactivity was tested by immersion in simulated body fluid (SBF) for 7 days. For histopathological evaluation, 36 adult New Zealand rabbits (72 pulp exposures) were divided into nine groups (n=8) according to the pulp capping material (NES, Ca(OH)2 and no capping as negative control group) and the animals were sacrificed after 7, 14 or 28 days. The pulps of the two lower central incisors were exposed then directly capped by Ca(OH)2 or NES, or left untreated. The cavities were then sealed with a glass ionomer cement. Teeth were collected for histopathological evaluation using optical microscope. Pulp haemorrhage, inflammation, fibrosis and calcific bridge formation were assessed. Results were statistically analyzed using ANOVA and Tukey's test. NE particles were spherical with 20 nm diameter and were composed mainly of calcite. Statistical analysis showed that there was significant increase in the release of all investigated ions between day 1 and 28, except for copper. NES group showed significantly higher release of all elements as compared to Ca(OH)2 . ESEM micrographs of NES incubated for 7 days in SBF showed the formation of HAp with Ca/P ratio (1.686). For histopathological evaluation, the difference between groups was statistically significant. At day 28, 75% of the pulps of Ca(OH)2 group showed mild calcific bridge in comparison with 100% moderate calcific bridge in NES group. The NES group showed significantly less inflammation at days 7 and 28, and higher fibrosis at day7 as compared with Ca(OH)2 . NES represents a promising novel direct pulp capping material with favourable pulp tissue response.

Evaluation of Direct and Indirect Pulp Capping With Biodentine in Vital Permanent Teeth With Deep Caries Lesions.

Pulp capping is a procedural method of preserving pulp vitality following deep caries damage or accidental pulp exposure. Biodentine is a calcium silicate material that has been promoted for use in pulp capping among various clinical applications. This study evaluated the outcome of pulp capping with Biodentine following curettage of deep caries in the case series of permanent mature teeth. The study was carried out on 40 teeth with advanced caries treated by direct and indirect pulp capping using Biodentine, within a follow-up of six months. This was carried out at the Department of Conservative Dentistry-Endodontics of the CCTD Ibn Rochd-Casablanca. Results: In this study, 43 teeth from 37 patients were treated with direct pulp capping and indirect pulp capping using Biodentine. The success rate of pulp capping was 90% at one month, 85% at three months, and 80% at six months. The results of the studies conducted using Biodentine indicate that it is a suitable material for direct and indirect pulp capping, due to its bioactivity and ability to form a dentinal bridge.

Potential Combination of Acemannan Sponge and Calcium Phosphate Cement-Calcium Sulfate Hemihydrate (CPC-CSH) as Direct Pulp Capping Alternative Materials for Reparative Dentin Formation

Abstract Background Health problem that affects hard tissues of the teeth is dental caries, which is experienced by around 2.3 billion people in the world, with prevalence in Indonesia reaching 88.8. Direct pulp capping (DPC) is a vital pulp therapy used to maintain pulp vitality. Calcium hydroxide (Ca(OH)2) is the gold standard pulp capping material, but has poor adhesion to dentin and mechanical properties, bacterial infiltration, formation of tunnel defects in the pulp resorption, and dentin bridge. Therefore, it is necessary to develop alternative therapy, namely, a combination of acemannan sponge and calcium phosphate cement (CPC)-calcium sulfate hemihydrate (CSH) for reparative dentin formation. Purpose This article describes the potential combination of acemannan sponge and CPC-CSH as DPC alternative materials for reparative dentin formation. Reviews Acemannan extracted from aloe vera exhibits anti-inflammatory, antimicrobial, and cytocompatibility properties. As DPC material, acemannan induces pulp proliferation and differentiation to osteoblast-like, growth factor synthesis, and promotes reparative dentin formation. However, acemannan sponge is radiolucent, allowing misinterpretation between pulp and acemannan sponge. CPC can be combined with CSH to shorten the setting time. CPC-CSH is radiopaque, has good compressive strength, and biocompatibility. CPC-CSH is a calcium-based material with neutral pH that can induce the dentin bridge formation. CPC-CSH showed good bioactivity because it induces the formation of apatite which plays a significant part in dentin and pulp regeneration. Conclusion The combination of acemannan sponge and CPC-CSH has the potential as DPC alternative materials for reparative dentin formation.

Dopamine is involved in reparative dentin formation through odontoblastic differentiation of dental pulp stem cells

Conventional direct pulp-capping materials induce pulp cells to secrete various biomolecules in pulp tissues that promote reparative dentin formation through induction of odontoblastic differentiation of dental pulp stem cells (DPSCs). However, these biomolecules sometimes induce bone-like dentin with poor sealing properties. Therefore, exploration of biomolecules that allow tight sealing by tubular reparative dentin is required. We recently reported that dopamine (DA) is involved in dentinogenesis. Hence, we investigated the effect of DA on odontoblastic differentiation of DPSCs and reparative dentin formation. Both tyrosine hydroxylase (TH), a DA synthetase, and DA were expressed in odontoblast-like cells in vivo. In vitro, their expression was increased during odontoblastic differentiation of DPSCs. Furthermore, TH-overexpressing DPSCs had promoted odontoblastic differentiation and DA production. Moreover, DA stimulation promoted their differentiation and induced tubular reparative dentin. These results suggest that DA produced by TH is involved in odontoblastic differentiation of DPSCs and has an inductive capacity for reparative dentin formation similar to primary dentin. This study may lead to the development of therapy to preserve vital pulp tissues.

A noval autogenous pulp capping material: A case report

Vital pulp therapy for cariously exposed permanent teeth remains one of the most controversial areas in dentistry. Because a vital pulp is capable of initiating several defence mechanisms to protect the tooth from bacterial invasion, hence it is beneficial to preserve the vitality and health of an exposed pulp rather than replace it with artificial material following pulp exposure. There is no consensus on the survival rate of formerly cariously exposed pulps. Observation time, diagnostic criteria, pulpotomy/pulp capping technique and most importantly, pulpal status at the time of treatment, vary to a great extent amongst studies. In mature teeth, a pulp exposed by caries is usually removed and the root canals are cleaned, shaped and filled. Amongst the methods for preservation of a cariously exposed pulp, direct pulp capping has yielded a markedly high success rate in young teeth. The lack of predictability and long-term success greatly influence decision-making. The decision-making itself is unreliable primarily due to the difficulty of accurately diagnosing the ability of the pulp to repair. While there are various direct pulp capping materials like calcium hydroxide, MTA, Biodentin are considered to be expensive.PRF known to be bodies own tissue being autogenous graft aids in biological healing kinetics. present clinical procedure utilize PRF as direct pulp capping agent which will probably help pulp for repair and regeneration and also considered to be as clinically feasible procedure .

Assessment of Pulpal Status in Primary Teeth Following Direct Pulp Capping in an Experimental Canine Model.

(1) Background: This study aimed to assess the pulpal response of primary teeth by pulse-oximetry (PO) in a canine model, following direct pulp capping (DPC). (2) Methods: Forty-eight primary teeth from eight canine subjects were divided into three treatment groups, based on the DPC material—calcium hydroxide (CH), MTA, BiodentineTM)—and three corresponding control groups. Data from PO pulp testing were correlated with laser Doppler flowmetry (LDF) testing, computer tomographic (CT) densitometry and histological analysis; the experiment lasted 14 days. (3) Results: SpO₂ recordings revealed statistically significant differences (p = 0.002, <0.05) between the treatment and control groups, and no significant differences (p = 0.257, >0.05) were observed between treatment groups. LDF recordings showed significant differences (p = 0.002, <0.05) between the treatment and control groups and identified significant differences between materials (p = 0.001, <0.05). CT densitometry indicated vital pulps in all teeth, with pulpal inflammation detected in 6/8 CH-capped teeth and 2/8 MTA-capped teeth. Histologic evaluation confirmed vital pulp in all specimens, with different degrees of inflammation. (4) Conclusions: Within its limitations, the present study confirms the diagnostic value of PO evaluation of pulpal status in primary teeth with histologic means after pulp-capping procedures in a canine model. However, various degrees of pulpal inflammation elicited by different pulp-capping materials seem not to correlate with the obtained PO values.

Histopathological Analysis and Comparison between Experimentally Fabricated Hydroxyapatite from Nile Tilapia Bone and Mineral Trioxide Aggregate as A Direct Pulp Capping Agents on Dog Pulp (In Vivo Study)

AIM: The aim of this study was to study response of exposed dental dog pulp to the HP from Nile Tilapia bone and MTA on induction of reparative dentin formation and to inflammatory response in pulp tissue. MATERIALS AND METHODS: Four male mongrel dogs 1 year old with total of 20 teeth from each dog were selected and divided into two groups that each group has 40 teeth according to the material used as pulp capping agents. The maxillary teeth and the mandibular teeth for each dog were capped by both materials alternatively; the cavities were then sealed by glass-ionomer cement. Each group divided in two groups according to 2-time intervals (4 weeks and 8 weeks). Animals were sacrificed and teeth were collected for histopathological analysis. RESULTS: Specimens capped by fish bone powder after 4 weeks, which showed non-significantly higher of inflammatory cell scores than that capped by MTA. It showed thin (score 1) to moderate (score 2) thickness of dentine bridge formation, mostly a-tubular dentin, in all specimens. After 8 weeks, significant decrease in inflammatory cell infiltration scores for both groups were found, but it was significant in case of fish bone powder. Furthermore, dentine bridge became more significant for both materials with slight histological change in the group capped by fish bone powder. CONCLUSIONS: HA from Nile Tilapia bone could be considered as a direct pulp capping material. Furthermore, more studies needed on the fabrication of this material to give better result in shape and the pattern of reparative dentine formed.