Miswak Stick Research

6 peer-reviewed studies supporting this intervention. Evidence rating: B

6 Studies
2 RCTs
4 Meta-analyses
2004-2024 Year Range

Study Comparison

Study Year Type Journal Key Finding
Abdellatif HM et al. 2024 RCT Healthcare (Basel, Switzerland) Miswak was as effective as conventional toothbrushing for reducing dental plaque and gingivitis in a 4-week randomized controlled trial.
Ramli H et al. 2022 Meta-analysis Journal of ethnopharmacology Meta-analysis of 10 RCTs shows miswak is comparable to toothbrushing for plaque (SMD 0.39, p=0.08) and gingivitis (SMD 0.13, p=0.37), with adjunctive miswak use significantly superior for both outcomes.
Adam FA et al. 2022 Meta-analysis Journal of ethnopharmacology Salvadora persica mouthwash showed comparable effectiveness to chlorhexidine for reducing plaque and improving gingival health in a meta-analysis of clinical trials.
Adam FA et al. 2021 Meta-analysis Journal of ethnopharmacology Meta-analysis of 14 studies found miswak chewing sticks are as effective as standard toothbrushes for reducing plaque and gingivitis.
Jassoma E et al. 2019 Meta-analysis BMC oral health Salvadora persica extracts demonstrate clear antiplaque and anticariogenic effects with Level Ia evidence and Class A recommendation strength, though inferior to chlorhexidine gold standard.
Almas K et al. 2004 RCT The journal of contemporary dental practice Miswak produces significantly greater reduction in Streptococcus mutans compared to toothbrushing (p=0.013), demonstrating immediate antimicrobial action from the chewing stick's bioactive compounds.

Study Details

Abdellatif HM, Hebbal M, Alsagob E, et al.

Healthcare (Basel, Switzerland)

Key Finding: Miswak was as effective as conventional toothbrushing for reducing dental plaque and gingivitis in a 4-week randomized controlled trial.
View Summary

This randomized controlled trial compared the effectiveness of miswak (Salvadora persica chewing stick) versus conventional toothbrushing for plaque removal and gingivitis reduction. Participants were randomly assigned to use either miswak or a standard toothbrush for four weeks, with plaque index and gingival index measured at baseline and follow-up.

Results showed no statistically significant difference between the two groups in plaque or gingival scores, indicating that miswak is comparable to conventional toothbrushing for maintaining oral hygiene. Both groups demonstrated meaningful reductions in plaque accumulation and gingival inflammation over the study period.

The findings support miswak as a viable, low-cost, and accessible alternative to toothbrushes, particularly in communities where commercial oral care products may be less available. The study adds to the growing body of RCT evidence validating traditional chewing stick use for everyday dental care.

Ramli H, Nor Aripin KN, Mohd Said S, et al.

Journal of ethnopharmacology

Key Finding: Meta-analysis of 10 RCTs shows miswak is comparable to toothbrushing for plaque (SMD 0.39, p=0.08) and gingivitis (SMD 0.13, p=0.37), with adjunctive miswak use significantly superior for both outcomes.
View Summary

This systematic review and meta-analysis evaluated the effectiveness of miswak (chewing sticks from Salvadora persica and Azadirachta indica) in reducing dental plaque and gingivitis among adults. The authors searched multiple databases and ultimately included 10 randomized controlled trials comparing miswak practices to conventional toothbrushing.

The meta-analysis found no statistically significant difference between miswak alone and toothbrushing for plaque index (SMD 0.39, 95% CI -0.05 to 0.83, p=0.08) or gingival index (SMD 0.13, 95% CI -0.16 to 0.42, p=0.37), indicating that miswak is comparable to conventional toothbrushing for basic oral hygiene. However, when miswak was used as an adjunct to toothbrushing, the combined approach was significantly superior for both plaque reduction and gingivitis prevention compared to toothbrushing alone.

These findings are clinically relevant for populations where toothbrushes and toothpaste are less accessible, as miswak provides a viable, low-cost alternative for maintaining oral health. The study also supports miswak as a beneficial supplement to standard oral hygiene routines, suggesting that its bioactive compounds (benzyl isothiocyanate, salvadorine, and tannins) provide additional antimicrobial and anti-inflammatory benefits beyond mechanical cleaning alone.

Adam FA, Mohd N, Rani H, et al.

Journal of ethnopharmacology

Key Finding: Salvadora persica mouthwash showed comparable effectiveness to chlorhexidine for reducing plaque and improving gingival health in a meta-analysis of clinical trials.
View Summary

This systematic review and meta-analysis compared the periodontal health effects of Salvadora persica (miswak) extract mouthwash against chlorhexidine gluconate, the gold-standard antimicrobial mouthwash in dentistry. The authors searched multiple databases and pooled data from clinical trials that directly compared the two mouthwash formulations.

The meta-analysis found that Salvadora persica mouthwash demonstrated comparable effectiveness to chlorhexidine for reducing plaque index and improving gingival index scores. While chlorhexidine showed slight numerical advantages in some outcomes, the differences were not statistically significant in the pooled analysis, suggesting clinical equivalence between the two products.

Importantly, Salvadora persica mouthwash may offer practical advantages over chlorhexidine, which is associated with side effects including tooth staining, taste alteration, and mucosal irritation with prolonged use. The natural miswak extract mouthwash showed a more favorable side-effect profile while delivering similar antimicrobial and anti-inflammatory benefits. These findings extend the evidence for miswak beyond the traditional chewing stick format, demonstrating that the plant bioactive compounds retain their effectiveness in mouthwash formulations.

Adam FA, Mohd N, Rani H, et al.

Journal of ethnopharmacology

Key Finding: Meta-analysis of 14 studies found miswak chewing sticks are as effective as standard toothbrushes for reducing plaque and gingivitis.
View Summary

This systematic review and meta-analysis evaluated the comparative effectiveness of Salvadora persica (miswak) chewing sticks versus standard toothbrushes for plaque and gingivitis control. The authors systematically searched multiple databases and included 14 clinical trials meeting their inclusion criteria.

Pooled analysis found no significant difference between miswak and conventional toothbrush use for plaque index or gingival index scores. The meta-analysis demonstrated that miswak performs comparably to standard toothbrushes across multiple oral health outcomes, with some individual studies even showing slight advantages for miswak on gingival health markers.

The review highlights the pharmacological basis for miswak effectiveness, noting the presence of antimicrobial compounds such as salvadorine, benzyl isothiocyanate, and silica in Salvadora persica wood. These bioactive compounds provide both mechanical cleaning and chemical antibacterial action, which may explain why the simple chewing stick matches the performance of modern toothbrushes. The findings support WHO recommendations recognizing miswak as an effective oral hygiene tool.

Jassoma E, Baeesa L, Sabbagh H

BMC oral health

Key Finding: Salvadora persica extracts demonstrate clear antiplaque and anticariogenic effects with Level Ia evidence and Class A recommendation strength, though inferior to chlorhexidine gold standard.
View Summary

This systematic review and meta-analysis compared the antiplaque and anticariogenic efficacy of Salvadora persica (miswak) mouthrinse to chlorhexidine, the current gold standard antimicrobial mouthwash. The researchers conducted a comprehensive search across PubMed, Scopus, Web of Science, and Cochrane Library, ultimately including clinical trials that directly compared S. persica-based mouthrinses against chlorhexidine formulations.

The pooled analysis demonstrated that while S. persica mouthrinses showed clear antiplaque and anticariogenic properties, they were generally inferior to chlorhexidine in direct comparisons. The evidence was classified as Level Ia (highest evidence level, based on systematic review of RCTs) with a Class A recommendation strength, confirming that S. persica extracts are a legitimately effective oral hygiene agent supported by robust clinical evidence.

The clinical significance lies in miswak-derived mouthrinses offering a natural, plant-based alternative for patients who prefer to avoid synthetic antimicrobials or who experience side effects from chlorhexidine (such as tooth staining and taste alteration). The active compounds in Salvadora persica, including benzyl isothiocyanate and salvadorine, provide antimicrobial activity against cariogenic and periodontopathic bacteria through multiple mechanisms, making it a promising adjunct to standard oral care protocols.

Almas K, Al-Zeid Z

The journal of contemporary dental practice

Key Finding: Miswak produces significantly greater reduction in Streptococcus mutans compared to toothbrushing (p=0.013), demonstrating immediate antimicrobial action from the chewing stick's bioactive compounds.
View Summary

This clinical study compared the immediate antimicrobial effects of miswak (Salvadora persica chewing stick) versus conventional toothbrushing on cariogenic bacteria. The randomized crossover design enrolled adult participants who used both miswak and a standard toothbrush in separate sessions, with bacterial samples collected before and immediately after each oral hygiene method.

The key finding was that miswak produced a statistically significant greater reduction in Streptococcus mutans, the primary bacterium responsible for dental caries, compared to toothbrushing (p=0.013). Both methods reduced overall bacterial counts, but the miswak's superior performance against S. mutans specifically suggests that its bioactive compounds provide antimicrobial action beyond simple mechanical plaque removal.

The results support the hypothesis that naturally occurring compounds in Salvadora persica, particularly benzyl isothiocyanate and other sulfur-containing phytochemicals, have direct bactericidal effects on oral pathogens. This study is notable for demonstrating immediate rather than cumulative effects, suggesting that miswak's antimicrobial benefits begin with the first use. The crossover design strengthened the findings by eliminating inter-individual variability as a confounding factor, as each participant served as their own control.

Evidence Assessment

B Moderate Evidence

This intervention has moderate evidence from some randomized trials and consistent observational data, though more research would strengthen conclusions.