Efficacy of single versus double miniscrew-assisted maxillary anterior intrusion in subjects with gummy smile or deep bite: A systematic review and meta-analysis.

AIM

The focus of this review is to compare the efficacy and predictability of single versus double miniscrew placement for maxillary anterior intrusion.

MATERIAL AND METHODS

Systematic search for relevant articles published between 2005 and January 2025 was conducted across electronic databases including Scopus, PubMed, WoS, EBSCOhost and Cochrane Library. Studies meeting pre-defined eligibility criteria were included and assessed for methodological quality. Data on intrusion of maxillary anteriors using MS was extracted from included studies. Meta-analysis was conducted to evaluate the effectiveness of single versus double MS in relation to anterior intrusion.

RESULTS

The analysis showed that bilateral miniscrews (MS), placed between the maxillary lateral incisors and canines, resulted in significantly greater maxillary anterior intrusion compared to a single MS placed between the central incisors. Bilateral MS also provided better control over incisor inclination and stability with minimal side effects. The forest plot further confirmed significant intrusion with bilateral MS, with a mean difference of -0.25 and an overall effect (Z) of 1.98. The comparison between single and double MS demonstrated a significant effect of double MS on maxillary anterior intrusion (P<0.00001).

CONCLUSION

Bilateral MS configurations offer a reliable and effective treatment approach in maxillary anterior intrusion, particularly when considering individual variations in anatomical and clinical factors.