Science 5 min read

Sodium Bicarbonate on Implants: Why the Evidence Says Stop

Dental implants represent a significant investment for patients and a cornerstone of modern restorative dentistry. Yet many practices continue using a prophylaxis powder that the scientific evidence clearly shows damages implant surfaces—putting long-term implant success at risk. Sodium bicarbonate powder has been used for decades in dental hygiene, but when applied to implants, the evidence is unequivocal: it must be stopped.

The Problem: Why Sodium Bicarbonate Damages Implants

Sodium bicarbonate powder particles range from 40–65 micrometers in diameter, making them significantly more abrasive than modern alternatives. When used around implant abutments during prophylaxis, sodium bicarbonate dramatically increases surface roughness on the implant surface itself.

This might seem like a minor cosmetic issue, but the consequences are profound. Increased surface roughness on titanium implants facilitates biofilm formation and colonization. Bacteria and oral pathogens preferentially colonize rough surfaces; smooth surfaces present a hostile environment for biofilm attachment. By increasing roughness, sodium bicarbonate directly undermines the very mechanism that keeps implants clean and healthy long-term.

The Core Problem

Sodium bicarbonate powder (40–65µm) increases implant surface roughness, which increases biofilm formation and compromises long-term implant success. This is not opinion—it is what the peer-reviewed evidence demonstrates.

Dental implant model showing surface detail

Photo: Karolina Kaboompics / Pexels

What the Evidence Shows

The scientific case against sodium bicarbonate on implants is built on three decades of research. Here are the key findings:

The Solution: Low-Abrasive Alternatives

Fortunately, three evidence-based, specifically designed alternatives exist to replace sodium bicarbonate for implant prophylaxis. Each was developed because the dental profession recognized the harm sodium bicarbonate causes:

Glycine (25 micrometers)

Glycine powder is the smallest standard option, allowing deep subgingival access without tissue trauma. It maintains implant smoothness while achieving effective biofilm removal. Critically, glycine has received FDA approval for subgingival use on implants. It represents the gold standard for implant maintenance in the vast majority of cases.

Erythritol (14 micrometers)

Erythritol is the finest powder available and has demonstrated additional antimicrobial properties. It actively inhibits bacterial re-colonization on titanium and promotes favorable biological responses in peri-implant tissues. While slightly more expensive than glycine, erythritol is ideal for patients with aggressive biofilm formation or a history of peri-implantitis.

Trehalose

Trehalose represents an emerging option with promising early evidence for implant safety and biofilm reduction. While less established than glycine and erythritol, it offers another low-abrasive choice for practices seeking to diversify their prophylaxis armamentarium.

Powder Particle Size Implant Safety Biofilm Removal Additional Benefits Glycine 25 µm Excellent 89.3% reduction FDA approved, subgingival access Erythritol 14 µm Excellent Excellent Antimicrobial, inhibits bacterial re-colonization Trehalose Variable Good Good Emerging evidence, biofilm inhibition Sodium Bicarbonate 40–65 µm Contraindicated Effective (but damages surface) None—damages implants

Do / Don't: Implant Prophylaxis At a Glance

✓ DO ✗ DON'T
Use glycine (25 µm) as your primary implant powder. It is the gold standard. Use sodium bicarbonate on implant abutments or surfaces under any circumstance.
Consider erythritol (14 µm) for aggressive biofilm or peri-implantitis history. Assume older practices are safe. Sodium bicarbonate was standard for decades but is now contraindicated.
Verify your powder choice during new patient exams. Ask hygienists what they use. Use sodium bicarbonate subgingivally on any tooth surface, including around implants.
Document powder selection in patient records for continuity of care and compliance auditing. Mix powders or use sodium bicarbonate as a "fallback" option.
Train your team on why the change matters for patient outcomes. Assume your hygiene team knows the current evidence. Education is essential.

Practical Steps to Transition Your Practice

If your practice is still using sodium bicarbonate on implants, the transition is straightforward:

  1. Audit your current inventory. Identify all sodium bicarbonate powder in use. Document quantities and expiration dates.
  2. Select a replacement standard. For most practices, glycine is the pragmatic choice: well-established, cost-effective, and FDA approved for subgingival use.
  3. Train your hygiene team. Conduct a brief continuing education session on why the change is necessary. Emphasize that this protects long-term patient outcomes and reduces liability.
  4. Order supplies. Contact your dental supply distributor. Glycine and erythritol are widely available from major suppliers (Henry Schein, Patterson, Benco, and others).
  5. Update protocols and SOPs. Modify your standard operating procedures to explicitly prohibit sodium bicarbonate on implant surfaces. Make this a documented office policy.
  6. Communicate with patients. Consider a brief explanation if patients ask: "We've updated our prophylaxis protocol to use the most current evidence on implant care. Your implants will thank you."
  7. Monitor compliance. Spot-check hygiene appointments to ensure the protocol is being followed. Make it part of your quality assurance routine.

The Bottom Line

The evidence against sodium bicarbonate on implants is clear, consistent, and decades in the making. Using it today is indefensible from a patient care and risk management perspective. Low-abrasive alternatives—particularly glycine and erythritol—provide equivalent or superior biofilm removal without damaging the implant surface.

Your patients invested significantly in their implants. They deserve prophylaxis protocols that preserve those investments, not compromise them. The transition away from sodium bicarbonate is not a suggestion—it is a professional obligation.

Key Studies & References

  • Implant surface roughness and biofilm formation study — PubMed ID: 27283010
  • Erythritol and chlorhexidine efficacy on titanium surfaces — PMC6164901
  • Petersilka et al. (2008). Glycine vs. sodium bicarbonate on gingival health and biofilm reduction (89.3% efficacy with glycine)
  • Subgingival prophylaxis systematic review and clinical practice recommendations — PMC10647465
  • MDPI comprehensive comparison: sodium bicarbonate vs. erythritol on implant surface integrity
  • FDA approval documentation for glycine powder subgingival use on implants

Author: Preventio Hub

This article is part of Preventio Hub's commitment to evidence-based dental prophylaxis practices. All information is presented without commercial bias or brand preference. Brands and products are listed alphabetically where mentioned.