How Soon Can You Eat or Brush Your Teeth After a Filling?｜證據鏈

How Soon Can You Eat or Brush Your Teeth After a Filling?｜證據鏈

F-Units (fact ledger)

• F1｜Topic-selection basis: a full GSC reconciliation across 14 dental clinic sites found 342,865 total impressions for 8 queries including 「補牙後多久可以吃東西」 and 「補牙後多久可以刷牙」 at one site,(including 1 Simplified-Chinese variant)｜Source #20｜confidence=high｜basis=internal_dataset｜period=GSC retention window (from 2025-03-22)｜geo: TW｜caveat: impressions are property-level figures, not deduplicated traffic; this is internal data, not a medical claim.
• F2 [structural synthesis]｜The three-layer triage framework of “anesthesia / material / symptoms,” the comparison “extraction aftercare concerns a wound / filling aftercare concerns the tooth and restoration,” and the synthesis of “three clinical variables that determine when normal biting is possible” are communication structures synthesized by this site from F3 through F19｜Source #22｜confidence=n/a｜basis=editorial_framework｜period=2026-08-05｜geo: universal｜caveat: not a diagnostic tool or clinical guideline and must not be labelled a pending verification claim; it contains no efficacy or time-course claim.
• F3｜In the control group without reversal medication, median soft-tissue anesthesia recovery was 155 minutes for the lower lip, 125 minutes for the tongue, and 133 minutes for the upper lip｜Source #1｜confidence=verified｜basis=peer_reviewed (PMID 18682623; two multicenter randomized double-blind phase III trials; 484 adolescent and adult participants)｜period=2008｜geo: universal｜span:「Median recovery times in the lower lip and tongue for subjects in the sham group were 155 minutes and 125 minutes, respectively. Upper lip median recovery times were 50 minutes for subjects in the PM group and 133 minutes for subjects in the sham group」｜caveat: restorative and prophylaxis settings using local anesthetic with vasoconstrictor; this card cites only the order of magnitude that soft-tissue anesthesia lasts several hours, not an estimate for an individual case; same anchor as F3 in KM-DENTAL-20.
• F4｜In a pediatric trial (152 participants aged 4 to 11 years), median recovery to normal lip sensation was 135 minutes in the control group; the authors stated that shortening post-treatment soft-tissue anesthesia can reduce post-treatment lip and tongue injuries in children｜Source #2｜confidence=verified｜basis=peer_reviewed (PMID 18682624, randomized controlled trial)｜period=2008｜geo: universal｜span:「The median recovery time to normal lip sensation was 60 minutes for the subjects in the PM group versus 135 minutes for subjects in the control group」「PM can help dental clinicians shorten the post-treatment duration of soft-tissue anesthesia and can reduce the number of posttreatment lip and tongue injuries in children」｜caveat: the intervention was reversal medication; this card cites the control-group time and the authors' description of injury risk, and does not promote any drug.
• F5｜Shortening soft-tissue anesthesia may reduce self-inflicted injuries associated with inferior alveolar nerve block｜Source #3｜confidence=verified｜basis=peer_reviewed (PMID 24654413, literature review)｜period=2014｜geo: universal｜span:「would significantly reduce the duration of soft tissue anesthesia, and subsequently may reduce the incidence of the undesirable post-treatment self-inflicted injuries associated with inferior alveolar nerve block」｜caveat: pediatric-dentistry population review; the authors use “may”; same anchor as F4 in KM-DENTAL-20.
• F6｜A survey of 301 dentists found that about 60% thought adequate post-treatment instructions could prevent lip, cheek, and tongue biting after local anesthesia; the study also tested three intraoral anti-biting appliances in 45 children aged 3 to 15 years｜Source #4｜confidence=verified｜basis=peer_reviewed (PMID 31110609, questionnaire survey plus appliance assessment)｜period=2019｜geo: universal｜span:「About 60% of the dentists were of the opinion that provision of adequate instructions after treatment could prevent the occurrence of lip, cheek, and tongue biting」｜caveat: one country; dentist-opinion survey rather than patient outcome; appliance sample was small and this card recommends no appliance.
• F7｜In-vitro measurement found Knoop microhardness at the bottom of resin specimens rose significantly after 24 hours of storage; degree of conversion and microhardness had a linear relationship (R² = 0.86)｜Source #5｜confidence=verified｜basis=peer_reviewed (PMID 27207201; in-vitro experiment; two resin-based composites)｜period=2016｜geo: universal｜span:「The KHN increased significantly after 24 hours of storage」「There was a linear relationship between DC and KHN (R(2) = 0.86)」｜caveat: in-vitro materials measurement, not a clinical eating-timing study; the study's focus was temperature effects, and this card cites only the storage-time result.
• F8｜Bis-GMA-system composite resin undergoes post-irradiation polymerization: degree of conversion was measured immediately after curing and after 24 hours of storage, and TEGDMA was considered the main contributor｜Source #6｜confidence=verified｜basis=peer_reviewed (PMID 10551090, in-vitro experiment)｜period=1999｜geo: universal｜span:「The degree of conversion of each composite was measured by Fourier transformation infrared spectroscopy immediately after being cured and after 24 h of storage, and the post-irradiation polymerization was determined」「TEGDMA is considered to be the main contributor to post-irradiation polymerization of bis-GMA based composites」｜caveat: experimental formulations, not commercial products; must not be extrapolated to clinical eating advice.
• F9｜Five dental amalgams had compressive strength measured at 1 hour, 6 hours, 24 hours, and 7 days: at 24 hours all reached about 90% or more of their seven-day compressive strength; two reached about 90% at 6 hours; the strength increase from 1 hour to 24 hours varied between products｜Source #7｜confidence=verified｜basis=peer_reviewed (PMID 8940553, in-vitro experiment with X-ray diffraction analysis)｜period=1995｜geo: universal｜span:「At 24 hours all tested amalgams reached about 90% or more of their seven-day compressive strength, but the increase in the early compressive strength from one hour to 24 hours varied between different amalgams. Two of the five amalgams tested reached about 90% of their seven-day compressive strength at six hours」「indicating that the increases in early compressive strength are mainly dependent upon the formation of gamma 1」｜caveat: compressive strength of in-vitro specimens, not a clinical trial of chewing; 1995 data, five products, and current products may differ.
• F10｜One-hour compressive strength varied greatly among 22 commercially available dental amalgams｜Source #8｜confidence=verified｜basis=peer_reviewed (PMID 1056080, in-vitro experiment)｜period=1975｜geo: universal｜span:「The one-hour compressive strength of 22 commercially available dental amalgams has been measured. Large differences between different alloys were observed」｜caveat: 1975 data, used only to show early-strength inconsistency within a material class; it does not represent current product values.
• F11｜Four glass-ionomer luting cements were tested for dissolution after immersion 3, 6, or 9 minutes after mixing: delaying water contact from 3 to 9 minutes markedly reduced surface loss in all four materials; water-setting glass ionomer was less sensitive to early moisture contamination｜Source #9｜confidence=verified｜basis=peer_reviewed (PMID 9791796, in-vitro experiment)｜period=1998｜geo: universal｜span:「Glass ionomer cements are susceptible to attack by moisture during the initial setting period that can result in an increased solubility」「Increasing the time from start of mixing until immersion in water from 3 to 9 minutes resulted in a marked decrease in loss of substance from the surface of all 4 cements」｜caveat: the test material was luting glass ionomer, not a restorative formulation; this card cites only the mechanistic direction that early water increases dissolution and gives no time instruction.
• F12｜An in-vitro test of four restorative glass ionomers in 3.5-mm-deep Class I cavities stored for up to one year found a gentle increase in Vickers hardness over the year and an approximately 300-μm mechanically weaker intermediate layer at every filling–dentin interface｜Source #10｜confidence=verified｜basis=peer_reviewed (PMID 23954325, in-vitro experiment, 100 teeth)｜period=2013｜geo: universal｜span:「HV shows a gentle increase over the 1 year storage period (P = 0.002)」「A ∼300 μm GIC zone at the areas close to dentin with weaker properties as those measured in dentin or GIC was identified in all fillings」｜caveat: in-vitro artificial-saliva storage conditions, not intraoral clinical follow-up.
• F13｜The setting kinetics of conventional glass ionomer can be changed by external treatment: combined heat and ultrasound produced mechanical properties at 24 hours higher than the control, but no significant difference at 1 month or 3 months｜Source #11｜confidence=verified｜basis=peer_reviewed (PMID 26087577, in-vitro experiment)｜period=2015｜geo: universal｜span:「Only the dual treatment increased the mechanical properties of the GIC after 24 hours compared to the control, while no significant difference was observed after 1 and 3 months」｜caveat: in-vitro study of one material; this card cites the direction that early properties are still changing and recommends no intervention.
• F14｜A 2026 Cochrane overview of systematic reviews (14 reviews, 57 primary studies; final-follow-up data preferentially from 6 reviews and 23 primary studies) found that only one review reported postoperative pain and discomfort when comparing composite resin with amalgam, at about 5% in both groups and judged very-low-certainty evidence; between bulk-fill and incrementally layered composites, the postoperative-sensitivity risk difference was 0.00 (95% CI −0.01 to 0.02)｜Source #12｜confidence=verified｜basis=peer_reviewed (PMID 42444634, Cochrane overview of systematic reviews)｜period=2026 (searched to 2025-04)｜geo: universal｜span:「The Minamata Convention on Mercury recommends a phase-down of amalgam use in dentistry. Alternative mercury-free direct-placement restorative materials are available」「Only one review reported postoperative pain and discomfort (about 5% in both groups), which reviewers judged to be very low-certainty evidence」「In one review, there was almost no postoperative sensitivity for either type of RBC (RD 0.00, 95% CI -0.01 to 0.02; 5 studies; 510 restorations; 2 to 3 years follow-up)」｜caveat: the overview authors noted only about 10% of primary studies came from general-practice settings; the proportions are population-level figures, not individual probabilities.
• F15｜A Cochrane systematic review (8 studies, more than 700 participants) found inconsistent, low-quality evidence on whether a cavity liner reduces postoperative sensitivity in Class I and Class II composite restorations, and found no evidence that a liner affects restoration longevity｜Source #13｜confidence=verified｜basis=peer_reviewed (PMID 30834516, Cochrane systematic review)｜period=2019 (searched to 2018-11)｜geo: universal｜span:「There is inconsistent, low-quality evidence regarding the difference in postoperative hypersensitivity subsequent to placing a dental cavity liner under Class I and Class II posterior resin-based composite restorations」「no evidence was found to demonstrate a difference in the longevity of restorations placed with or without dental cavity liners」｜caveat: all included studies had unclear or high risk of bias.
• F16｜A randomized clinical study (54 posterior teeth; questionnaires returned by 46 participants) found no significant difference in postoperative pain (P > .05) between occlusal reduction and no reduction in cases with irreversible pulpitis and mild tenderness to percussion｜Source #14｜confidence=verified｜basis=peer_reviewed (PMID 23228248, randomized clinical study)｜period=2013｜geo: universal｜span:「There was no significant difference in postoperative pain between the 2 groups (P > .05) after root canal preparation and calcium hydroxide dressing」｜caveat: root-canal-treatment setting, not fillings; this card cites only the direction that the benefit of occlusal management requires individual judgment.
• F17｜A randomized clinical study (117 patients) identified a clinical profile more likely to benefit from occlusal reduction: pulp vitality, percussion sensitivity, preoperative pain, and absence of periradicular radiolucency｜Source #15｜confidence=verified｜basis=peer_reviewed (PMID 9693578, randomized clinical study)｜period=1998｜geo: universal｜span:「Occlusal reduction should prevent postoperative pain in those patients whose teeth initially exhibit pulp vitality, percussion sensitivity, preoperative pain, and/or the absence of a periradicular radiolucency」｜caveat: after root-canal instrumentation, not fillings; direction differs from F16, and this card presents both.
• F18｜In a randomized double-blind clinical trial of 124 mature permanent teeth with caries radiographically extending to at least the inner two-thirds of dentin and diagnosed reversible pulpitis, 17 of 61 teeth (28%) in the complete-caries-removal group had pulp exposure and received vital pulp therapy at the visit; multivariable analysis found the caries-removal strategy and preoperative pain level (above or below 5/10) were significant prognostic factors｜Source #16｜confidence=verified｜basis=peer_reviewed (PMID 39442480, randomized controlled trial, registration NCT05144711)｜period=2024｜geo: universal｜span:「17/ 61 teeth (28%) in the TCR had pulp exposure, managed by VPT and were successful at recall」「Multivariate analysis revealed the type of procedure (SCR vs TCR) and the preoperative pain levels (above or below 5/10) as significant prognostic factors」｜caveat: single center with 12 months' follow-up; this card cites the clinical implication that pulp status after deep caries needs follow-up, not a recommendation that one technique is superior.
• F19｜A practice-based retrospective study (44 adults, 306 posterior composite restorations, 10 to 18 years' follow-up) found 30% failure, 82% of it in patients with 1 or 2 risk factors; secondary caries was the main failure reason in the caries-risk group and fracture in the occlusal-stress-risk group｜Source #17｜confidence=verified｜basis=peer_reviewed (PMID 23690354, retrospective clinical study)｜period=2013｜geo: universal｜span:「In total, 30% of the restorations failed, of which 82% were found in patients with 1 or 2 risk factors. Secondary caries was the main reason of failure within caries-risk patients, whereas fracture was the main reason in "occlusal-stress-risk" patients」｜caveat: retrospective design, one practice setting, and few patients; a long-term longevity measure with no direct link to behavior within 24 hours after treatment.
• F20｜In a retrospective study, proximal restorations with marginal overhangs had periodontal pockets 0.42 mm deeper than metal restorations without overhangs; among patients with mean radiographic attachment loss ≤5 mm, overhanging margins were associated with significantly greater radiographic attachment loss (0.66 mm)｜Source #18｜confidence=verified｜basis=peer_reviewed (PMID 7806672, retrospective clinical study)｜period=1994｜geo: universal｜span:「Periodontal pockets at proximal sites with marginal overhangs were significantly deeper (0.42 mm) compared to sites with metal restorations without overhangs」｜caveat: retrospective data from a referral population; association only. This card cites it for the point that a poorly fitting margin merits checking, not for causal assertion.
• F21｜In a crossover clinical study (9 participants), placing restorations with a 1-mm proximal overhang shifted subgingival flora toward a composition resembling chronic periodontitis; replacing them with clinically perfect margins shifted flora toward gingival health or initial gingivitis｜Source #19｜confidence=verified｜basis=peer_reviewed (PMID 6581173, crossover clinical study)｜period=1983｜geo: universal｜span:「Following the placement of restorations with overhanging margins, a subgingival flora was detected which closely resembled that of chronic periodontitis」「Following the placement of the restorations with clinically perfect margins, a microflora characteristic for gingival health or initial gingivitis was observed」｜caveat: extremely small sample (9 people), 1983, and experimental placement; this card cites the mechanistic direction.
• F22｜Article 87, paragraph 2 of Taiwan's Medical Care Act: publication of medical knowledge or research reports, patient health education, and academic publications that do not solicit medical business are not considered medical advertising｜Source #21｜confidence=verified (HTTP 200 and verbatim match verified on 2026-08-05)｜basis=law｜period=current text｜geo: TW｜caveat: basis for this card's publication status in Taiwan's system, not a medical fact; readers in other regions should follow local rules.
• F23 [structural synthesis]｜Evidence-gap statement: on 2026-08-05, this site searched PubMed E-utilities (queries included post-operative instructions restorative dentistry / amalgam early compressive strength / post-cure polymerization resin composite / glass ionomer early water contact / toothbrushing after restoration) and found no direct clinical research on: (1) comparative trials of how many hours after a filling to eat; (2) clinical validation of “do not bite hard food for 24 hours after an amalgam filling”; (3) delaying brushing after a filling; or (4) timing of flossing after a filling｜Source #22｜confidence=n/a｜basis=editorial_framework｜period=2026-08-05｜geo: universal｜caveat: the search was limited to English PubMed literature and these queries; not finding evidence does not mean it has been disproved. This is an editorial statement and must not be labelled a pending verification claim. All materials-science data in this card are in-vitro measurements and must not be mutually extrapolated with clinical eating advice.

Source list

All sources were accessed on 2026-08-05. PubMed abstracts were retrieved through E-utilities efetch for verbatim comparison, and every item page was tested to return HTTP 200.

1. Hersh EV, Moore PA, Papas AS, et al. Reversal of soft-tissue local anesthesia with phentolamine mesylate in adolescents and adults. J Am Dent Assoc. 2008;139(8):1080-1093. PMID 18682623
2. Tavares M, Goodson JM, Studen-Pavlovich D, et al. Reversal of soft-tissue local anesthesia with phentolamine mesylate in pediatric patients. J Am Dent Assoc. 2008;139(8):1095-1104. PMID 18682624
3. Smith T, Urquiola R, Oueis H, et al. Comparison of articaine and lidocaine in the pediatric population. J Mich Dent Assoc. 2014;96(1):34-37. PMID 24654413
4. Alghamidi WA, Alghamdi SB, Assiri JA, et al. Efficacy of self-designed intraoral appliances in prevention of cheek, lip and tongue bite after local anesthesia administration in pediatric patients. J Clin Exp Dent. 2019;11(4):e315-e321. PMID 31110609
5. AlShaafi MM. Effects of Different Temperatures and Storage Time on the Degree of Conversion and Microhardness of Resin-based Composites. J Contemp Dent Pract. 2016;17(3):217-223. PMID 27207201
6. Tarumi H, Imazato S, Ehara A, et al. Post-irradiation polymerization of composites containing bis-GMA and TEGDMA. Dent Mater. 1999;15(4):238-242. PMID 10551090
7. Suchatlampong C, Goto S, Ogura H. Early compressive strength and phase-formation of dental amalgam. Dent Mater J. 1995;14(2):143-151. PMID 8940553
8. Espevik S. One-hour compressive strength of dental amalgam. Scand J Dent Res. 1975;83(1):37-40. PMID 1056080
9. Gemalmaz D, Yoruc B, Ozcan M, Alkumru HN. Effect of early water contact on solubility of glass ionomer luting cements. J Prosthet Dent. 1998;80(4):474-478. PMID 9791796
10. Zoergiebel J, Ilie N. An in vitro study on the maturation of conventional glass ionomer cements and their interface to dentin. Acta Biomater. 2013;9(12):9529-9537. PMID 23954325
11. Dehurtevent M, Deveaux E, Hornez JC, et al. Influence of heat and ultrasonic treatments on the setting and maturation of a glass-ionomer cement. Am J Dent. 2015;28(2):105-110. PMID 26087577
12. Lewis SR, Walsh T, Glenny AM, et al. Restorative materials for direct coronal restoration of permanent posterior teeth: an overview of systematic reviews. Cochrane Database Syst Rev. 2026;7(7):CD016279. PMID 42444634
13. Schenkel AB, Veitz-Keenan A. Dental cavity liners for Class I and Class II resin-based composite restorations. Cochrane Database Syst Rev. 2019;3(3):CD010526. PMID 30834516
14. Parirokh M, Rekabi AR, Ashouri R, et al. Effect of occlusal reduction on postoperative pain in teeth with irreversible pulpitis and mild tenderness to percussion. J Endod. 2013;39(1):1-5. PMID 23228248
15. Rosenberg PA, Babick PJ, Schertzer L, Leung A. The effect of occlusal reduction on pain after endodontic instrumentation. J Endod. 1998;24(7):492-496. PMID 9693578
16. Taha NA, Ali MM, Abidin IZ, Khader YS. Pulp survival and postoperative treatment needs following selective vs. total caries removal in mature permanent teeth with reversible pulpitis: A randomized clinical trial. J Dent. 2024;151:105408. PMID 39442480
17. van de Sande FH, Opdam NJ, Rodolpho PA, et al. Patient risk factors' influence on survival of posterior composites. J Dent Res. 2013;92(7 Suppl):78S-83S. PMID 23690354
18. Jansson L, Ehnevid H, Lindskog S, Blomlöf L. Proximal restorations and periodontal status. J Clin Periodontol. 1994;21(9):577-582. PMID 7806672
19. Lang NP, Kiel RA, Anderhalden K. Clinical and microbiological effects of subgingival restorations with overhanging or clinically perfect margins. J Clin Periodontol. 1983;10(6):563-578. PMID 6581173
20. Internal data: `analysis/reports/km-dental-backlog.md`, appendix #2 (8 queries × 1 site × reconcilable per-impression records; total 342,865).
21. Taiwan Medical Care Act, Article 87 (National Laws and Regulations Database)
22. Editorial framework: this site's three-layer triage structure and evidence-gap statement (no external source; labelled structural synthesis).

Internal citation chain

• Related postoperative-diet topic (the post-surgery timeline and item-by-item answers for coffee, tea, and alcohol): How Soon Can I Eat After an Implant? Can I Drink Coffee or Tea? (KM-DENTAL-20) (soft-tissue anesthesia anchor F3 = F3 in that card; self-injury anchor F5 = F4 in that card)
• A procedure mentioned when caries extends below the gumline and cannot be restored: What Is Crown Lengthening? Cost, Insurance, and Pain (KM-DENTAL-17)
• A comparison of whether a molar must be replaced after it can no longer be retained: Can a Missing Molar Be Left Unreplaced? What Happens? (KM-DENTAL-34)

Publication-gate reminder: this card is a draft and cannot enter km_entries until zh-Hans, English, and Japanese versions exist. If direct evidence is found later for F23's evidence-gap statement, rewrite that section rather than retaining “not found.” Every language version must include its geographic-scope statement (see the global-card wording in ANK-DENTAL-SPEC.md).