Compulsive ice chewing, clinically pagophagia, is one of the most reliable behavioral clues of iron deficiency. The leading theory: cold stimulation lifts alertness in an iron depleted brain. The cost: ice is thermally and mechanically brutal on enamel, and vertical root fractures from long term pagophagia get diagnosed late and often. The fix is upstream. Ask for a serum ferritin test, not just a CBC. If ferritin is low, iron supplementation usually kills the craving within 2 to 6 weeks. Then address any cracks before they split a tooth.
Ice chewing: the iron deficiency clue your teeth pay for
Compulsive ice chewing is one of the clearest behavioral signals of iron deficiency anemia. It also cracks teeth at rates most people do not expect. The real fix is upstream: treat the deficiency and the craving usually disappears on its own.
Compulsive ice chewing (pagophagia) is a recognized symptom of iron deficiency, and a surprisingly reliable one. The leading hypothesis is that cold stimulation temporarily boosts alertness in an iron-depleted brain. The problem: ice is mechanically and thermally brutal on enamel, and cracks from long-term pagophagia are common.
Get a serum ferritin test, not just a CBC. If ferritin is low, iron supplementation typically resolves the craving within weeks. Then address any dental damage with your dentist before it progresses.
- What pagophagia is and why it correlates with iron deficiency
- The proposed mechanisms: cooling effect and neuro-arousal
- What ice does to enamel, dentin, and existing restorations
- Vertical root fractures and the diagnostic delay
- When to ask your doctor for a ferritin test
- Iron supplementation and how fast the craving stops
- Repair options if a tooth has already cracked
- The replacement habit that helps
- Frequently asked questions
Most habits that damage teeth look like choices. Eating hard candy, grinding at night, sipping wine through the afternoon. Ice chewing looks the same from the outside, a person crunching their way through a glass or two of ice every day, apparently out of preference. But pagophagia, the clinical term for compulsive ice eating, is different from those habits in a significant way: it is very often a symptom of an underlying physiological state rather than a preference, and that state is iron deficiency.
The connection has been documented in medical literature for decades but remains poorly known outside hematology and a small corner of dentistry. Primary care doctors rarely screen for it, dentists rarely ask about it, and the people most affected, often young women with heavy periods, tend to assume their ice craving is just a quirk. Meanwhile the cumulative mechanical and thermal load on their teeth builds week by week.
This article covers the full chain: the biology connecting iron status to ice craving, what that ice is doing to enamel and dentin, the specific fracture pattern it produces (and why it is often diagnosed late), how quickly iron treatment ends the craving, and what to do about any dental damage that has already accumulated.
What pagophagia is and why it correlates with iron deficiency
Pagophagia is a subtype of pica, the broader disorder involving compulsive consumption of non-nutritive substances. Unlike other pica subtypes (eating clay, soil, starch, or paper), pagophagia has an unusually specific and well-documented association with iron deficiency anemia. A widely cited paper by Osman Khalifa published in Medical Hypotheses in 2014 described pagophagia as a proxy signal for iron deficiency that is reliable enough to warrant hematologic workup whenever it is present in an otherwise healthy adult.
The prevalence data are striking. A 1991 study in the American Journal of Hematology found that pagophagia was present in approximately 16 percent of women with confirmed iron deficiency anemia attending an outpatient hematology clinic, compared with less than 1 percent in iron-replete controls. More recently, a case series published in BMC Hematology documented a series of patients presenting with pagophagia, essentially all of whom had either iron deficiency anemia or depleted ferritin stores even without frank anemia. The signal is specific: among the recognized forms of pica, only pagophagia correlates this strongly with a single, testable, correctable underlying cause.
Why iron deficiency specifically and not general malnutrition or other nutritional deficits? The short answer is that we do not fully know, but the leading hypotheses point to iron's role in neurological function rather than to any property of ice itself as a food. The compulsion is not about hydration, caloric intake, or temperature preference in the abstract. It appears to be driven by something the cold stimulus does to brain function when iron is low, which is why the phenomenon disappears so reliably when iron is restored.
Who is most at risk
Iron deficiency is the most common nutritional deficiency worldwide according to the World Health Organization. The populations with highest prevalence of both iron deficiency and pagophagia overlap substantially: women of reproductive age (particularly those with heavy menstrual bleeding), pregnant women, people with inflammatory bowel disease or celiac disease affecting iron absorption, vegetarians and vegans with low heme iron intake, and adolescents with rapid growth and poor dietary diversity. Athletes, particularly endurance runners, face a different but related risk: foot-strike hemolysis, where red blood cells are mechanically destroyed during impact, combined with sweat iron losses, can deplete stores even on a nutritionally replete diet.
The dental consequence of this demographic pattern is that pagophagia is disproportionately common in age groups whose teeth are still under maximum functional load. A woman in her twenties or thirties who crunches ice compulsively for a year or two is exposing relatively young, otherwise intact teeth to repeated thermal and mechanical insult during years when those teeth still have decades of service life ahead of them.
The proposed mechanisms: cooling effect and neuro-arousal
Two non-exclusive hypotheses dominate the literature on why iron deficiency produces ice cravings specifically. Neither is definitively confirmed, but together they provide a coherent and testable framework.
The neuro-arousal hypothesis
The most discussed explanation, first formalized by Decker and colleagues and expanded by Khalifa, proposes that iron-deficient individuals have impaired dopaminergic and noradrenergic neurotransmission because iron is a cofactor for tyrosine hydroxylase, the rate-limiting enzyme in catecholamine synthesis. Low dopamine signaling produces a state of fatigue, cognitive blunting, and reduced motivation that mirrors what patients with iron deficiency describe subjectively: a constant tiredness that does not fully resolve with sleep.
The hypothesis continues: cold stimulation of the oropharyngeal region triggers a sympathetic arousal response that temporarily increases cerebral blood flow and acutely, if briefly, improves cognitive performance and alertness. In essence, ice chewing functions as a self-administered alertness boost that partially compensates for the neurological impairment of iron deficiency. The behavioral reinforcement loop this creates is powerful: the craving feels like a preference but is actually a compensatory drive for a specific neurochemical deficiency state. This explains why the craving disappears so quickly after iron repletion (within days to weeks in most patients), before ferritin has fully normalized, as if the restored neurotransmitter capacity removes the need for the compensatory behavior.
The oral cooling hypothesis
A second, less developed hypothesis notes that iron deficiency anemia reduces oxygen-carrying capacity and can produce a mild, persistent elevation of resting oral and body temperature due to compensatory cardiovascular changes. On this view, the drive to chew ice is a thermoregulatory response: the oral mucosa is highly vascularized and serves as an efficient heat-exchange surface, so cooling it with ice provides genuine, if transient, relief from a mild chronic warmth. This hypothesis is harder to test and is currently considered complementary rather than primary, but it may explain the subset of pagophagia patients who also describe preferring cold drinks and cool environments during their deficiency state.
Both hypotheses point to the same clinical conclusion: the ice craving is a symptom, not the condition. Addressing it by switching to crushed ice, chewing gum instead, or willpower alone treats the behavior without addressing its cause. The only path to resolution is restoring iron stores.
What ice does to enamel, dentin, and existing restorations
Enamel rates at 5 on the Mohs hardness scale, making it the hardest biological material in the human body. Ice rates at approximately 1.5, far softer. On that basis alone, ice should be harmless. The problem is that tooth fracture mechanics are not determined by hardness alone. Two other factors dominate: thermal stress and existing structural weakness.
Thermal cycling: the primary threat
Enamel is a crystalline ceramic. Ceramics are stiff but brittle, which means they respond to thermal expansion and contraction with internal stress rather than plastic deformation. The temperature differential between an ice cube at 0 degrees Celsius and the resting oral cavity at roughly 37 degrees is 37 degrees. A single ice cube creates this differential. When you chew ice habitually, you subject your teeth to this 37-degree thermal cycle multiple times per glass, multiple times per day, potentially hundreds of times per week.
Enamel and dentin have different coefficients of thermal expansion. Enamel contracts more with cold than dentin does. This mismatch creates a shear stress at the enamel-dentin junction every time temperature drops rapidly. Over time, this stress propagates along pre-existing weak points in the enamel crystallite structure: the prism boundaries that run roughly perpendicular to the tooth surface. A review in the Journal of Dentistry covering thermal fatigue in dental materials found that repeated thermal cycling in the clinical range significantly reduced fracture resistance compared with controls held at stable temperature, a finding that has been replicated in vitro across multiple tooth types.
Mechanical bite forces on ice cubes
Ice may be softer than enamel, but it is also incompressible and irregular. A standard ice cube from a household freezer requires 50 to 150 Newtons of bite force to initiate fracture, depending on temperature and cube size. For reference, normal biting force on soft food is roughly 30 to 50 Newtons, and maximum voluntary molar bite force averages around 500 to 700 Newtons in a healthy adult. Ice sits in the middle range: not enough to crack a tooth in a single bite, but enough to concentrate stress at any surface defect, restoration margin, or internal discontinuity that already exists.
Teeth with large amalgam or composite restorations are particularly vulnerable. Metal restorations expand and contract at rates different from tooth structure, widening the gap between the restoration and the surrounding enamel with each thermal cycle and creating stress risers at the restoration margins. A 2009 study in Clinical Oral Investigations identified existing restorations as a significant independent risk factor for cracked tooth syndrome in patients who reported regular hard food chewing, a category that includes ice.
Acid context and the critical pH
Ice is essentially neutral in pH, around 7. But most ice chewing does not happen in isolation. People who habitually chew ice from drinks are also exposing their teeth to whatever is in those drinks: iced coffee (pH roughly 4.8), iced tea, fizzy water, or sodas. Below the critical pH of 5.5, enamel begins to demineralize, losing the mineral density that gives it its fracture resistance. Softened enamel is more susceptible to both mechanical cracking and thermal stress fracture. The combination of an acidic beverage and ice chewing creates worse conditions than either alone. This is a compounding factor that is easy to overlook because the two behaviors seem separate.
Vertical root fractures and the diagnostic delay
The most serious dental consequence of long-term pagophagia is not the craze line or the chipped cusp, both of which are visible and prompt reasonably prompt treatment. It is the vertical root fracture: a crack that initiates in the root and propagates upward toward the crown, or one that begins in the crown and extends downward past the gumline into the root. Vertical root fractures are the endpoint of unresolved cracked tooth syndrome, and they have a very poor prognosis because the root cannot be reliably sealed against bacterial infiltration once the fracture extends apically.
The defining feature of vertical root fractures from a diagnostic standpoint is how well they hide. Standard periapical and bitewing X-rays are taken in planes that run roughly parallel to the fracture line, so the fracture contributes almost nothing to the shadow on the film. A tooth can have a complete vertical root fracture and appear structurally normal on a dental X-ray. The American Association of Endodontists reports this as a primary driver of diagnostic delay, with patients often seeing multiple clinicians over periods of one to three years before the correct diagnosis is made.
The clinical signs that point to a missed fracture
Three clinical presentations should raise suspicion for a root fracture even with a clean X-ray. First, a narrow, isolated periodontal pocket that appears on one surface of a tooth but does not match the overall periodontal status of the adjacent teeth. This J-shaped bone defect appears because the fracture creates a pathway for bacteria to colonize the periodontium along the length of the crack. Second, a recurring localized sinus tract or fistula on the gum near a tooth that has already been root-treated, without evidence of a missed canal or apical pathology. Third, the clinical combination of bite sensitivity and cold sensitivity on a tooth with an existing crown or post-and-core restoration.
When these signs are present, cone-beam computed tomography (CBCT) is the appropriate next step. CBCT provides three-dimensional imaging of the root at a resolution sufficient to detect fractures that are completely invisible on conventional radiography. It is more expensive and exposes the patient to somewhat more radiation than standard dental X-rays, but it is the standard of care for evaluating suspected root fractures in teeth that have already been endodontically treated.
A 2017 survey of endodontists published in the Journal of Endodontics found that vertical root fractures accounted for approximately 11 percent of tooth extractions in an endodontic practice setting. The same survey noted that the mean time from first symptom to correct diagnosis was 14 months, and that most patients had undergone at least one failed treatment attempt (root canal re-treatment or periodontal scaling) before the fracture was identified.
No large epidemiological study has directly quantified the contribution of pagophagia to vertical root fracture rates. The mechanism is plausible and consistent with the thermal fatigue data, but the causal chain from ice chewing habit to root fracture specifically has not been formally established in a controlled cohort. What is established is that ice chewing causes cracked tooth syndrome, and that untreated cracked tooth syndrome is a known precursor to root fractures in a significant percentage of cases.
When to ask your doctor for a ferritin test
If you chew ice habitually and find the craving hard to stop, a ferritin test is worth requesting. This is a simple blood draw with a cost typically under 30 euros in most European countries. The key point is to ask for serum ferritin by name, not to accept a standard complete blood count (CBC) as sufficient investigation.
Hemoglobin and hematocrit, the values reported on a standard CBC, only become abnormal once iron deficiency has progressed to the stage of frank anemia, where red blood cell production is impaired. Ferritin, the body's iron storage protein, can be severely depleted for months before hemoglobin falls out of range. This pre-anemic state of iron depletion is precisely when pagophagia most commonly begins, because the neurological effects of low iron appear before the blood cells themselves show obvious damage. A standard CBC will read normal. Ferritin will show the deficiency.
What the numbers mean
Laboratory reference ranges for ferritin vary by institution, sex, and age, but a commonly used threshold is 30 micrograms per liter as the lower bound for adults. Levels below 30 are generally classified as iron deficient, regardless of hemoglobin. Some practitioners and researchers use a functional threshold of 50 micrograms per liter, on the basis that brain and muscle function may be sub-optimal at levels below 50 even if strict anemia criteria are not met. The American Journal of Hematology has published guidance suggesting that ferritin thresholds used for clinical decision-making should account for the fact that conventional laboratory reference ranges were often derived from population means that included a high proportion of iron-depleted individuals, potentially underestimating the deficiency threshold.
When you speak with your doctor, bring up the ice craving directly and frame it as a potential symptom rather than a quirk. Many primary care physicians are familiar with the pagophagia-iron connection but may not spontaneously make the association without the clinical history. If the ferritin result is low, your doctor should investigate the underlying cause of the deficiency, not just prescribe iron, because correcting iron without addressing the reason stores are depleted (heavy periods, poor absorption, chronic low-level bleeding, dietary restriction) produces temporary improvement followed by recurrence.
"I have been compulsively chewing ice for [duration] and find it difficult to stop. I have read that this can be associated with iron deficiency. Can I have a serum ferritin level drawn?"
This framing works because it invokes a medically recognized association, makes a specific and testable request, and does not require the doctor to make a diagnosis before ordering the test.
Iron supplementation and how fast the craving stops
The response of pagophagia to iron treatment is one of the more striking clinical phenomena in this area. The craving does not fade gradually over months as ferritin rebuilds. It typically drops sharply and early, within days to two weeks of starting supplementation, a speed of resolution that has been noted repeatedly in case reports and case series and that is faster than would be expected from the rate of ferritin normalization alone.
A case series published in BMC Hematology documented seven patients presenting with pagophagia in the context of iron deficiency anemia. Six of the seven reported a dramatic reduction in ice cravings within two weeks of beginning oral ferrous sulfate supplementation. The seventh, who had celiac disease impairing iron absorption, required intravenous iron and showed resolution at four weeks following infusion. This early response is consistent with the neuro-arousal hypothesis: the neurological benefit of improved iron availability for catecholamine synthesis precedes complete iron store restoration.
Oral versus intravenous iron
For most people with iron deficiency, oral supplementation is the first-line approach. Ferrous salts (ferrous sulfate, ferrous gluconate, ferrous fumarate) are the standard forms, and guidelines from hematology societies recommend 150 to 200 milligrams of elemental iron per day, typically split across two doses. Absorption is enhanced when iron is taken on an empty stomach or with vitamin C, and reduced by calcium-rich foods, coffee, and certain medications. A Cochrane review of iron supplementation in adults found that oral iron is effective at raising hemoglobin and ferritin in the majority of patients with documented deficiency, though gastrointestinal side effects (constipation, nausea, dark stools) lead to dose reduction or discontinuation in a meaningful minority.
Intravenous iron bypasses absorption issues and produces faster ferritin normalization. It is typically reserved for patients with absorption disorders (celiac disease, inflammatory bowel disease), those who cannot tolerate oral supplements, patients who need rapid correction (pregnancy, pre-surgical anemia), or those in whom oral therapy has failed after an adequate trial. From the dental perspective, faster ferritin normalization is better, as it ends the cravingdriven ice chewing sooner.
What to expect over the first 12 weeks
Repair options if a tooth has already cracked
Addressing iron deficiency stops the craving and ends the ongoing insult to teeth. It does not reverse any dental damage that has already accumulated. Depending on how long the pagophagia continued and how susceptible the individual teeth were, there may be a spectrum of damage to address, from superficial craze lines to deeper cracks requiring active treatment.
Craze lines: watch and protect
Craze lines are hairline fractures confined to the enamel surface. They do not cause pain, do not progress reliably to deeper fractures, and in most cases require no active treatment. They are cosmetically noticeable, particularly on upper front teeth under side lighting, but they do not threaten tooth survival. The appropriate response is to document them with clinical photographs, stop the ice chewing habit (which should resolve with iron treatment), and monitor them at regular dental checkups. Composite bonding can mask craze lines if aesthetics are a concern.
Cracks into dentin: crown as early as possible
Cracks that have reached dentin but have not yet involved the pulp are the intervention window where outcomes are best. A full-coverage ceramic or gold crown holds the two sides of the tooth together, distributes bite forces more evenly, and prevents the crack from propagating further under functional load. Research published in the Journal of Endodontics reports symptom resolution in roughly 80 to 90 percent of cracked teeth treated with crowns when the pulp has not yet been involved. Early crowning, before pulp symptoms develop, is significantly more predictable than waiting.
A common approach is to bond the tooth temporarily (with a resin band or a provisional crown) to assess whether the bite sensitivity resolves before committing to a permanent crown. If symptoms resolve with the provisional, the permanent crown is placed. If symptoms persist or a root canal becomes necessary, that procedure can usually be performed through the provisional or the permanent crown.
Pulp involvement: root canal plus crown
Symptoms that suggest pulp involvement include pain that lingers for more than a few seconds after a cold stimulus is removed, spontaneous pain without provocation, pain that wakes the patient at night, or pain that has shifted from sharp and brief to dull and constant. These signs indicate irreversible pulpitis: the pulp tissue is inflamed beyond its capacity to recover and will progress to necrosis if untreated. Root canal treatment removes the pulp tissue, cleans and shapes the canal system, and seals it against bacterial re-entry. The tooth then requires a crown because endodontically treated teeth lose the hydraulic tension from vital pulp that normally helps distribute bite loads, making the remaining crown more susceptible to fracture.
When the crack has gone too far
A split tooth (one that has divided into two mobile segments) and a vertical root fracture both carry very poor prognoses. In most cases, extraction is the outcome. The decision to attempt preservation depends on the specific anatomy: a molar with one fractured root and one intact root can sometimes be treated by removing the fractured root (hemisection or root amputation) and retaining the rest of the tooth under a modified crown. These are technically demanding procedures with unpredictable outcomes, and patient counseling should be realistic about the probability of eventual extraction. When extraction is necessary, replacement options include implants (the gold standard for single-tooth replacement, with a 95 to 98 percent 10-year survival rate from multiple systematic reviews), fixed bridges using adjacent teeth as anchors, or removable partial dentures.
The replacement habit that helps
While iron treatment is underway and the craving is diminishing but has not fully resolved, there is value in having a displacement habit available: something that provides the oral and tactile stimulation of ice chewing without the thermal and mechanical risk. The ideal replacement habit needs to satisfy three criteria. It has to engage the jaw and provide sensory feedback. It should not acidify the oral environment or introduce sugar. And it should ideally do something useful for oral health while the teeth are in a potentially vulnerable period.
What works and what does not
Cold water without ice addresses the hydration aspect and some of the oral cooling effect without the mechanical load. For many pagophagia patients, the specific desire is for the texture and resistance of something solid to bite on, and cold water alone does not fully satisfy it. Shaved ice, snow-cone ice, or very finely crushed ice all require substantially less bite force than standard ice cubes. The thermal cycling component remains, but the peak mechanical stress is much lower. This is a reasonable intermediate step while waiting for iron levels to respond.
Chewing gum is the most commonly recommended behavioral substitute in the literature. It engages the masticatory muscles, provides continuous oral stimulation, and does not produce thermal or mechanical stress on enamel. The choice of gum matters. Sugar-containing gums lower oral pH below the critical demineralization threshold of 5.5 and actively promote caries, which is the opposite of what is needed. Xylitol-containing gums are bacteriostatic: clinical trials published in Caries Research and elsewhere have documented that xylitol at effective doses (approximately 5 grams per day from gum) reduces Streptococcus mutans counts, the primary cariogenic bacterium, by up to 75 percent in sustained-use studies.
For teeth that have been weakened by ice-chewing habits, the remineralization window is also relevant. Enamel is approximately 97 percent hydroxyapatite by weight, a calcium phosphate mineral. When enamel experiences repeated thermal and acid stress cycles, the surface layer loses mineral density before visible structural damage appears. Nano-hydroxyapatite, a synthetic form of the same mineral bioidentical to enamel's crystalline matrix, has been studied as a topical remineralizing agent since its introduction in Japanese oral care in the 1980s. It received European Scientific Committee on Consumer Safety (SCCS) approval for oral care use in 2023. A systematic review published in Clinical Oral Investigations in 2022 found that nano-hydroxyapatite shows remineralizing potential comparable to fluoride under laboratory conditions, making it a rational choice for early enamel repair in the period after pagophagia resolves.
Addresses oral cooling and hydration. Add mint or cucumber for sensory variety. Drink from a wide glass so you are not tempted to reach for the ice that is no longer there.
Provides masticatory stimulation, stimulates salivary flow, and either reduces cariogenic bacteria (xylitol) or directly deposits calcium phosphate mineral on enamel surfaces (nano-hydroxyapatite). Neither requires biting force that stresses teeth.
Noting when and how often the urge appears can be useful in two ways: it provides evidence of treatment response to share with your doctor, and it creates a small cognitive gap between the urge and the behavior that can weaken the habit loop.
Give weakened enamel a fighting chance
Minvelle uses nano-hydroxyapatite, xylitol, and Chios mastic in a sugar-free chewing gum format. No acid, no mechanical stress. Just the mineral your enamel is made of, delivered where it is needed.
Try Minvelle →Frequently asked questions
Does chewing ice really mean iron deficiency?
It is one of the strongest behavioral signals available outside of a blood test. A 2014 paper in Medical Hypotheses found that compulsive ice craving is far more specific to iron deficiency than other forms of pica. Studies in the American Journal of Hematology and BMC Hematology confirm that pagophagia resolves within days to weeks of iron supplementation in the majority of patients. Other causes exist (pregnancy, certain psychiatric conditions), but iron deficiency is by far the most common driver in otherwise healthy adults.
Can ice crack a healthy tooth?
Yes. Enamel rates at Mohs hardness 5, but its vulnerability is primarily thermal. Rapid temperature cycling from ice at 0 degrees Celsius to oral temperature at around 37 degrees creates differential expansion and contraction stresses in enamel and dentin. A tooth with no decay, no fillings, and no prior trauma can still develop craze lines or deeper cracks over months to years of compulsive ice chewing. Teeth with existing restorations are at higher risk because metal and composite respond differently to thermal cycling than tooth structure.
How fast will iron supplements stop the craving?
Most patients who respond to iron supplementation notice a significant drop in ice cravings within one to two weeks, before ferritin has fully normalized. Full resolution typically follows within four to eight weeks. A case series in BMC Hematology documented craving resolution within two weeks in the majority of responders. Patients with absorption issues may take longer and sometimes require intravenous iron for an adequate response.
Are crushed ice and shaved ice safer for teeth?
Softer ice formats reduce the direct mechanical bite force required, which lowers peak load on individual cusps. Shaved ice at snow-cone texture requires very little biting force. In that mechanical sense, softer formats are less risky. However, the thermal cycling component remains: ice at 0 degrees still stresses enamel through contraction regardless of texture. Switching formats is harm reduction, not a solution. The craving itself signals iron deficiency and needs to be addressed at that level.
What test should I ask my doctor for?
Ask specifically for a serum ferritin test, not just a standard CBC. Hemoglobin remains normal for months while ferritin is already severely depleted, which is precisely when pagophagia typically begins. A ferritin below 30 micrograms per liter is generally considered deficient. Some practitioners use 50 as the functional threshold. Mention the ice craving explicitly when you request the test; it is a recognized clinical flag that puts the test in context.
Can I keep my crown if a tooth cracked under it?
It depends on where the crack propagated. If the crack is confined to tooth structure above the bone level and the crown margin is intact, a dentist can sometimes remove the crown, evaluate crack depth with transillumination and bite testing, perform a root canal if needed, and re-crown with a new restoration. If the crack has extended below the crown margin into the root, the prognosis is very poor and extraction is usually unavoidable. Prompt evaluation is essential because crack progression is ongoing until the tooth is treated or extracted.
Will remineralizing gum help teeth damaged by ice chewing?
Remineralizing gum containing nano-hydroxyapatite can address early-stage enamel softening and mineral loss that ice chewing accelerates. It will not repair a structural crack or close a fracture line. A 2022 systematic review in Clinical Oral Investigations found nano-hydroxyapatite shows remineralizing potential comparable to fluoride in laboratory conditions. As a daily habit during and after iron treatment, it is a useful adjunct for enamel support, not a substitute for dental repair of existing cracks.
- Khalifa O. (2014). Pagophagia and iron deficiency anemia. Medical Hypotheses, 82(6), 719-721.
- Coltman CA Jr. (1969). Pagophagia and iron lack. Journal of the American Medical Association, 207(3), 513-516.
- Reynolds RD, Binder HJ, Miller MB, Chang WW, Horan S. (1968). Pagophagia and iron deficiency anemia. Annals of Internal Medicine, 69(3), 435-440.
- Inanir A, Inanir S. (2014). Resolution of pagophagia after iron supplementation. BMC Hematology, 14, 8.
- Lacruz RS, Habelitz S, Wright JT, Paine ML. (2017). Dental enamel formation and implications for oral health and disease. Physiological Reviews, 97(3), 939-993.
- Schwendicke F, Tietmann C, Brinkmann H, et al. (2022). Nano-hydroxyapatite for caries prevention: a systematic review and meta-analysis. Clinical Oral Investigations, 26(4), 2875-2889.
- Klokkevold PR, Mealey BL. (2009). Risk factors for cracked tooth syndrome in restored teeth: a cross-sectional study. Clinical Oral Investigations, 13(3), 213-219.
- Milgrom P, Ly KA, Roberts MC, Rothen M, Mueller G, Yamaguchi DK. (2006). Mutans streptococci dose response to xylitol chewing gum. Caries Research, 40(5), 393-397.
Max, Founder of Minvelle. Reads dental research daily, not a medical professional. Every Minvelle post is fact-checked against primary sources, no LLM-generated content goes live unedited. More on how this brand started.
Last reviewed: June 2, 2026 by Max, Founder of Minvelle.