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Gutta-percha/Bioceramic Sealer (BCS)
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The gutta-percha/bioceramic sealer (BCS) filling technique has gained popularity among endodontists, however there are no robust data  evaluating any potential impact of BCS vs. traditional filling techniques on postoperative pain (POP) among randomized controlled trials. The aim of this systematic review and meta-analysis was to assess the effect of the BCS filling technique compared with traditional filling techniques on POP in adult patients following root canal filling (RCF). 

  • meta-analysis
  • root canal filling
  • postoperative pain
  • bioceramic sealer
  • analgesic intake
  • flare-up
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View Times: 55
Revisions: 9 times (View History)
Update Time: 29 Oct 2021

1. Introduction

Postoperative pain (POP) after root canal filling (RCF) affects up to 40% of patients [1]. The intensity and duration of postoperative pain are subjective and can be affected by many factors. In particular, by the severity of preoperative pain according to the medical history of the present diagnosis, tooth type, age, gender, etc. The intraoperative factors are also various, such as physical properties of the endodontic instrument used for the initial treatment, features of the irrigation protocol such as chemical solutions and concentrations, microbiological stability and resistance, histopathological state of the tissues surrounding the tooth, etc. [1][2][3][4]. At the final stage of root canal treatment during the obturation step, the endodontic sealer locally and directly contacts with the altered periapical tissues through the apical foramen and additional lateral canals. Accordingly, the physical and chemical properties of the sealer, such as pH-level, consistency, etc., also affect the intensity of postoperative endodontic pain[1][2]. The gutta-percha/bioceramic sealer (BCS) filling technique has gained popularity among endodontists due to features that include biocompatibility (due to their similarity with biological hydroxyapatite) and bioactive stimulation of periapical healing[5][6][7]. However, there are no robust data evaluating any potential impact of BCS vs. traditional filling techniques on POP among randomized controlled trials (RCTs). The aim of this systematic review and meta-analysis was to assess the effect of the BCS filling technique compared with traditional filling techniques on POP in adult patients following RCF.

2. Research

This analysis considered all the studies that evaluated POP in adult patients, following RCF with BCS or traditional filling techniques.

Review question: How does the BCS filling technique affect the intensity of POP compared with the resin-based sealers (RBS) filling technique in patients undergoing a root canal treatment?

The study complies with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Statement (PRISMA) and was carried out on the basis of the Cochrane PICO formula (Table 1). The systematic review protocok was registered with the International Prospective Register of Systematic Reviews (PROSPERO) a priori, ID: CRD42021227248.

Table 1. Cochrane PICO formula

Patients

Intervention

Comparison

Outcome

With pulp / periapical disease

Filling with bioceramic technique

Filling with traditional technique

Postoperative pain

A comprehensive search strategy was designed to access biomedical databases, grey literature and a clinical trials register.

The inclusion criteria were RCTs that assessed POP after RCF using the BCS filling technique in permanent teeth with pulpal and/or periapical disease.

The quality of each RCT was assessed according to the Cochrane Risk of Bias Tool. We set an additional risk of bias according to the “Operator” (expert endodontist: Low risk; undergraduate student: High risk). 

The general methodology of this review followed thr directions of the Cochrane Handbook for Systematic Reviews of Interventions. Meta-analysis was performed using Review Manager (RevMan) Software (version 5.4.1, The Cochrane Collaboration, 2020). Sensitivity analysis was performed where needed.

3. Discussion

The search strategy identified 695 records, including 13 duplicates. The remainig 682 records were screened by the title and abstract (Figure 1).Figure 1. The preferred reporting items for systematic reviews  and meta-analysis flow diagram of the search result

Figure 1. The preferred reported items for systematic reviews and meta-analysis flow chart of the search results.

All the selected studies included teeth with pulp or periapical pathologies, without signs of radiolucency, requiring a primary endodontic treatment. However, only three studies included teeth that needed retreatment[8][9][10]. Four studies included teeth that were asymptomatic pre-operatively [10][11][12][13], two studies only included symptomatic teeth [8][14], and three studies examined asymptomatic and symptomatic teeth [15][16]. Only one study managed an endodontic treatment without local anesthesia. Furthermore, three studies assessed POP in anterior single-rooted teeth only[11][12][13].

The instrumentation and irrigation protocols were similar across the studies, but the filling techniques varied: Warm vertical condensation (WVC) was utilized in five studies, single-cone technique (SCT) in three studies, carrier-based obturation in one study, and lateral condensation in one study. The resin-based sealer (RBS) was utilized as a control group in all the included studies. One study deliberately carried out the filling procedure during a second visit to exclude the influence of instrumentation stage on POP. The other eight studies evaluated POP in the context of a single visit treatment.

A variety of pain rating scales were used, including variations of the Visual Analog Scale and Verbal Rating Scale, as well as the Heft and Parker Pain Rating Scales of 0–10, 0–100, 0–170 or verbal (no pain/mild pain/moderate pain/severe pain). The data were reported as either means or percentages. Four studies reported an analgesic intake and three studies reported an incidence of flare-ups.

The risk of bias in the nine RCTs is summarized in Table 2 . 

Table 2. Summary of the risk of bias of the included studies.
Study Risk of Bias
A B C D E F G Overall
GRAUNAITE et al. 2018 [31] + + ? + + + + ?
PAZ et al. 2018 [28] ? ? ? + + + - -
ATES et al. 2019 [35] + ?   + + + + ?
FERREIRA et al. 2019 [33] + + + + + + ? ?
FONSECA et al. 2019 [32] + + +     + + +
NABI et al. 2019 [34] ? ? + + + + ? ?
SHARMA et al. 2019 [36] ? ? ? ? + + ? ?
TAN et al. 2020 [30] + + + + + + + +
YU 2020 [29] + + ? ? ? + ? ?
“+”: low risk of bias, “?”: unclear risk of bias,“-”: high risk of bias. (A) Random sequence generation (selection bias). (B) Allocation concealment (selection bias). (C) Blinding of participants and personnel (performance bias). (D) Blinding of outcome assessment (detection bias). (E) Incomplete outcome data (attrition bias). (F) Selective reporting (reporting bias). (G) Other bias.
Pooled data analyses indicate tht POP was significantly lower in patients who underwent RCF woth BCS compared with RBS at 24 h (SMD= -0.20; P=0.04) (Figure 2) and 48 h (SMD+ -0.26, P=0.0005) after treatment (Figure 3).
Figure 2. Forest Plot of POP level 24 h after RCF with BCS vs. RBS. 
Figure 3. Forest Plot of POP level 48 h after RCF with BCS vs. RBS.
Analgesics intake did not significantly differ between the BCS and RBS groups 24 h after RCF (RR- 0.46; P= 0.14). The incidence of flare-up was also not significantly different between the BCS and RBS groups (OR= 0.32, P=0.24).
According to pain prevalence and severity in 24 h the probability of pain absence was 1.2 times higher in the BCS group vs RBS group (OR= 1.21; P= 0.86), while the same was observed for moderate pain (OR= 1.21; P= 0.59).The Probability of mild and severe pain was 1.2 and 1.7 times higher in the RBS group vs. the BCS group, respectively (OR= 0.83; P= 0.37; and R= 0.59; P=  0.62).
According to pain prevalence and severity in 48 h the probability of pain absence was 1.21 times higher in the BCS group vs. RBS group (OR= 1.21; P= 0.60), the same for mild pain (OR= 0.82; P= 0.59), while moderate pain was equally presented in both groups (OR= 1.00; P= 1.00).
There was a numerical difference in POP in favour of BCS for both warm vertical technique (WVT) and single cone technique (SCT) subgroups in 24 h  (OR= 0.85, P= 0.41) and 48 h (OR= 0.78, P= 0.33) after RCF.
There was evidence of a non-significant difference in POP in favor of RBS in the vital teeth subgroup (V) (P= 0.50) and a trend for lower POP in non-vital teeth group (NV) within the BCS group 24 h after RCT 9P= 0.16).
Pooled data reported there was a trend in the retreatment group for a difference in favour of RBS (OR= 1.20, P= 0.65) 24 h after RCT.
There was no significant difference in POP between the BCS and RBS groups when the treatment was carried out over single (OR= 0.77; P= 0.28) or multiple visits after 24h after RCF (OR= 0.81; P= 0.50)

4. Conclusions

Our findings suggest that the BCS filling technique may positively affect POP, while there was a trend of a beneficial effect for analgesic intake, incidence of flare-up, pulp status, and number of visits when using BCS, compared with RBS. However further well-designed clinical studies are warranted to supplement our results.

Full article and supplementary materials are available at http://doi.org/10.3390/jcm10194509

References

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Contributor :
View Times: 55
Revisions: 9 times (View History)
Update Time: 29 Oct 2021
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    Mekhdieva, E. Gutta-percha/Bioceramic Sealer (BCS). Encyclopedia. Available online: https://encyclopedia.pub/entry/14970 (accessed on 02 July 2022).
    Mekhdieva E. Gutta-percha/Bioceramic Sealer (BCS). Encyclopedia. Available at: https://encyclopedia.pub/entry/14970. Accessed July 02, 2022.
    Mekhdieva, Elina. "Gutta-percha/Bioceramic Sealer (BCS)," Encyclopedia, https://encyclopedia.pub/entry/14970 (accessed July 02, 2022).
    Mekhdieva, E. (2021, October 12). Gutta-percha/Bioceramic Sealer (BCS). In Encyclopedia. https://encyclopedia.pub/entry/14970
    Mekhdieva, Elina. ''Gutta-percha/Bioceramic Sealer (BCS).'' Encyclopedia. Web. 12 October, 2021.
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