Is Guided Biofilm Therapy more effective than scaling and root planing?

Based on the available evidence, GBT does not consistently outperform conventional scaling and root planing (SRP) or scaling and root debridement (SRD) in primary clinical periodontal outcomes.

A systematic review of five RCTs found that GBT showed advantages in patient satisfaction, reduced pain, and shorter treatment time, but its effects on bleeding on probing (BOP), clinical attachment level (CAL), and probing pocket depth (PPD) were inconsistent across studies, and the current evidence does not support clinical superiority of GBT ^[1]. This is reinforced by an RCT in supportive periodontal treatment patients where GBT required approximately 15% less chair-time than SRP but demonstrated equivalent biofilm removal and similar reductions in plaque score and gingival bleeding index ^[2].

In non-surgical periodontal therapy for stage III-IV periodontitis, GBT and conventional instrumentation produced comparably good clinical results - PPD reduction was achieved in 57.0% of GBT sites versus 58.7% for conventional treatment, with no statistically significant differences in most outcomes, though treatment time was significantly shorter for GBT ^[3]. In supportive periodontal care over 12 months, SRP actually produced a statistically significant reduction in BOP whereas GBT did not reach significance, though both groups showed similar improvements in PPD and other parameters ^[4].

In summary, GBT appears equivalent - not superior - to conventional approaches for clinical outcomes, while offering meaningful patient-centered benefits such as reduced treatment time and improved comfort ^[1][3][2][4]. Clinical judgement should guide protocol selection based on individual patient needs.