How to Make Your Dental Implants Last:
Daily Care and Preventing Peri-Implantitis
(Part 7)
What Raises the Risk of Implant Problems?
Some factors matter a great deal for implant health; others turn up in research with a smaller or less certain effect. Presenting them all with equal weight would be misleading, so they are ranked here roughly by strength of evidence.
Smoking
Smoking is one of the most consistently documented risk factors in this field.
Implants placed in smokers fail at roughly double the rate of those in non-smokers, with measurably more bone loss (on the order of half a millimeter more on average) and roughly double the odds of peri-implantitis specifically.
Heavier smoking is associated with worse outcomes than lighter smoking, and this is not just a healing-period risk: the added risk shows no clear sign of fading the longer an implant has been in place, and appears to persist for as long as someone continues to smoke.
Vaping
Vaping needs to be considered separately from cigarette smoking rather than assumed to carry identical risk.
Studies comparing e-cigarette users with non-smokers have found worse peri-implant measures in vapers: more bone loss, deeper probing depths, more plaque.
In a broader comparison across nicotine and tobacco products, e-cigarette users generally showed less bone loss than cigarette or waterpipe smokers, though still more than non-users.
Every study on this topic so far is a snapshot rather than a long-term follow-up, and none has tracked whether vapers actually lose implants more often over time.
The evidence points toward vaping being unfavorable for peri-implant tissue without yet establishing how that translates into long-term survival.
It should not be assumed safe, and it should not be equated with the far more extensively documented risks of cigarette smoking. One useful point: like smokers, vapers tend to show less bleeding on probing despite worse underlying findings, which can make an absence of bleeding a misleading reassurance.
History of Gum Disease
A previous history of periodontal (gum) disease is one of the strongest, most consistent risk indicators for peri-implant problems.
People with a history of periodontitis have a significantly higher risk of eventually losing an implant than people who never had gum disease, with an even more pronounced increase in the risk of peri-implantitis specifically.
This does not mean implants are off the table for someone with a periodontal history; it means maintenance and hygiene matter more, not less, for this group, and it is a good reason to bring active gum disease under control before implants are placed and to stay consistent with supportive care afterward.
Diabetes
The relationship between diabetes and implant outcomes is genuinely nuanced, and the evidence does not support a single cutoff number that determines whether someone can safely have implants.
Well-controlled type 2 diabetes does not appear to be a meaningful risk indicator; outcomes are broadly comparable to those in people without diabetes.
Poorly controlled diabetes, and even prediabetes, are associated with measurably more bone loss, and the data show a graded relationship: the higher a person’s average blood sugar (HbA1c), the more bone loss tends to appear.
Diabetes does not automatically rule out implant treatment, and no single HbA1c number should be treated as an automatic barrier.
Glycemic control is a genuinely relevant factor worth discussing with both your physician and your dentist, before treatment and on an ongoing basis afterward.
Grinding and Clenching
Bruxism (habitual grinding or clenching, often during sleep) is primarily a mechanical risk factor rather than an infectious one; it is not a major driver of the plaque-related inflammation that causes peri-implantitis.
What it does substantially raise is the risk of mechanical complications: loosened screws, fractured components, chipped or cracked ceramic.
Implants in people with probable bruxism also show a meaningfully higher overall failure rate, likely reflecting cumulative mechanical stress.
Night guards are commonly recommended for implant patients who grind. The reasoning rests on how they are understood to redistribute biting forces, and on clinical experience, rather than on large trials directly proving a night guard extends how long an implant lasts. It remains a sensible precaution, just one supported more by mechanical reasoning than by outcome trials.
Other Factors
Several other factors turn up in the research with weaker or less settled evidence, and giving them the same weight as smoking, gum disease history, or diabetes would overstate what is actually known.
Obesity shows an association with peri-implant mucositis in pooled data. For peri-implantitis specifically, an expert panel reviewing this evidence in 2025 did not reach agreement, with opinions notably split. This is a genuinely unsettled area, not an established risk factor.
Alcohol and age have each shown up as associated factors in some analyses, but the evidence for either as an independent, reliable predictor is limited. On age, what seems to matter is not years lived but practical factors that can accompany aging, such as reduced hand dexterity, vision changes, or a dry mouth, which can make daily cleaning harder. Implants do not deteriorate simply because a patient gets older.
Osteoporosis is reassuring territory: multiple analyses have found it does not meaningfully compromise implant survival on its own.
Keratinized tissue (a band of firmer gum that surrounds some but not all implants) is associated with somewhat less recession and easier plaque control where present, but current evidence has not established a clear effect on survival. It is a comfort factor more than a proven survival factor. (To be continued)