{"id":"F2017L01059","name":"Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 52 of 2017)","slug":"statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":96962,"registerId":"commonwealth-F2017L01059-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 52 of 2017)","content":"![Commonwealth Coat of Arms](image.001.png)\n\nStatement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 52 of 2017)\n\nmade under subsection 196B(2) of the\n\nVeterans' Entitlements Act 1986\n\nCompilation No. 1\n\nCompilation date: 24 September 2018\n\nIncludes amendments up to: Amendment Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 85 of 2018) (F2018L01169)\n\nThe day of commencement of this Amendment Statement of Principles concerning tooth wear is 24 September 2018.\n\nAbout this compilation\n\nThis compilation\n\nThis is a compilation of the Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 52 of 2017) that shows the text of the law as amended and in force on 24 September 2018.\n\nThe notes at the end of this compilation (the endnotes) include information about amending laws and the amendment history of provisions of the compiled law.\n\nUncommenced amendments\n\nThe effect of uncommenced amendments is not shown in the text of the compiled law. Any uncommenced amendments affecting the law are accessible on the Legislation Register (www.legislation.gov.au). The details of amendments made up to, but not commenced at, the compilation date are underlined in the endnotes. For more information on any uncommenced amendments, see the series page on the Legislation Register for the compiled law.\n\nApplication, saving and transitional provisions for provisions and amendments\n\nIf the operation of a provision or amendment of the compiled law is affected by an application, saving or transitional provision that is not included in this compilation, details are included in the endnotes.\n\nModifications\n\nIf the compiled law is modified by another law, the compiled law operates as modified but the modification does not amend the text of the law. Accordingly, this compilation does not show the text of the compiled law as modified. For more information on any modifications, see the series page on the Legislation Register for the compiled law.\n\nSelf‑repealing provisions\n\nIf a provision of the compiled law has been repealed in accordance with a provision of the law, details are included in the endnotes.\n\n![RMA-Red](image.002.jpeg)\n\nStatement of Principles\n\nconcerning\n\nTOOTH WEAR  \n(Reasonable Hypothesis)\n\n(No. 52 of 2017)\n\nThe Repatriation Medical Authority determines the following Statement of Principles under subsection 196B(2) of the Veterans' Entitlements Act 1986.\n\nDated 18 August 2017\n\n  \n\nContents\n\n1 Name\n\n2 Commencement\n\n3 Authority\n\n4 Application\n\n5 Definitions\n\n6 Kind of injury, disease or death to which this Statement of Principles relates\n\n7 Basis for determining the factors\n\n8 Factors that must exist\n\n9 Relationship to service\n\n10 Factors referring to an injury or disease covered by another Statement of Principles\n\nSchedule 1 - Dictionary\n\n1 Definitions\n\n  \n\n1 Name\n\nThis is the Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 52 of 2017).\n\n2 Commencement\n\nThis instrument commences on 18 September 2017.\n\n3 Authority\n\nThis instrument is made under subsection 196B(2) of the Veterans' Entitlements Act 1986.\n\n4 Application\n\nThis instrument applies to a claim to which section 120A of the VEA or section 338 of the Military Rehabilitation and Compensation Act 2004 applies.\n\n5 Definitions\n\nThe terms defined in the Schedule 1 - Dictionary have the meaning given when used in this instrument.\n\n6 Kind of injury, disease or death to which this Statement of Principles relates\n\n(1) This Statement of Principles is about tooth wear and death from tooth wear.\n\nMeaning of tooth wear\n\n(2) For the purposes of this Statement of Principles, tooth wear means:\n\n(a) the localised or generalised loss of dental hard tissues (enamel, dentine and dental restorative material) due to an intrinsic or extrinsic mechanical or chemical process; and\n\n(b) where dentine is exposed on at least one tooth surface, and causes:\n\n(i) severe tooth pain or sensitivity; or\n\n(ii) significant impairment of effective tooth function; and\n\n(c) is confirmed by a dental clinician using a recognised tooth wear evaluation system; and\n\n(d) comprises:\n\n(i) dental abrasion;\n\n(ii) dental attrition; and\n\n(iii) dental erosion; and\n\n(e) excludes:\n\n(i) mild tooth wear which is confined to the enamel; and\n\n(ii) loss of tooth substance caused by dental caries or discrete dental trauma.\n\n> Note 1: Tooth wear may cause tooth pain or dentine hypersensitivity that is persistent, or which occurs with eating, drinking or tooth cleaning, and which is of sufficient severity to interfere with normal oral function or require dental consultation. Masticatory function can be compromised by tooth pain and reduced vertical and horizontal dimension of the affected dentition.\n\n> Note 2: Dental reconstruction may be required.\n\n> Note 3: dental abrasion, dental attrition and dental erosion are defined in the Schedule 1 \\- Dictionary.\n\n(3) While tooth wear attracts ICD‑10‑AM code K03.0, K03.1 or K03.2, in applying this Statement of Principles the meaning of tooth wear is that given in subsection (2).\n\n(4) For subsection (3), a reference to an ICD‑10‑AM code is a reference to the code assigned to a particular kind of injury or disease in The International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Australian Modification (ICD‑10‑AM), Ninth Edition, effective date of 1 July 2015, copyrighted by the Independent Hospital Pricing Authority, ISBN 978‑1‑76007‑020‑5.\n\nDeath from tooth wear\n\n(5) For the purposes of this Statement of Principles, tooth wear, in relation to a person, includes death from a terminal event or condition that was contributed to by the person's tooth wear.\n\n> Note: terminal event is defined in the Schedule 1 – Dictionary.\n\n7 Basis for determining the factors\n\nThe Repatriation Medical Authority is of the view that there is sound medical‑scientific evidence that indicates that tooth wear and death from tooth wear can be related to relevant service rendered by veterans, members of Peacekeeping Forces, or members of the Forces under the VEA, or members under the MRCA.\n\n> Note: relevant service is defined in the Schedule 1 – Dictionary.\n\n8 Factors that must exist\n\nAt least one of the following factors must as a minimum exist before it can be said that a reasonable hypothesis has been raised connecting tooth wear or death from tooth wear with the circumstances of a person's relevant service:\n\n(1) for dental abrasion only, breathing dust in air at a concentration of greater than five milligrams per cubic metre:\n\n(a) for a cumulative period of at least 10 000 hours before the clinical onset of tooth wear; and\n\n(b) where that exposure has ceased, the clinical onset of tooth wear has occurred within six months of cessation;\n\n> Note: dental abrasion and dust are defined in the Schedule 1 - Dictionary.\n\n(2) for dental attrition only, having bruxism at the time of the clinical onset of tooth wear;\n\n> Note: dental attrition is defined in the Schedule 1 - Dictionary.\n\n(3) for dental erosion only:\n\n(a) consuming an average of at least 750 millilitres per day of any combination of drinks from the specified list of erosive drinks:\n\n(i) for a continuous period of at least two years before the clinical onset of tooth wear; and\n\n(ii) where that exposure has ceased, the clinical onset of tooth wear has occurred within one year of cessation;\n\nNote: dental erosion and specified list of erosive drinks are defined in the Schedule 1 \\- Dictionary.\n\n(b) having gastro-oesophageal reflux disease within the two years before the clinical onset of tooth wear;\n\n(c) having an eating disorder at the time of the clinical onset of tooth wear;\n\n(d) having alcohol use disorder at the time of the clinical onset of tooth wear;\n\n(e) having xerostomia for at least the six months before the clinical onset of tooth wear;\n\n> Note: xerostomia is defined in the Schedule 1 - Dictionary.\n\n(f) having hyperemesis gravidarum within the three months before the clinical onset of tooth wear;\n\n> Note: hyperemesis gravidarum is defined in the Schedule 1 - Dictionary.\n\n(g) swimming in a swimming pool with a pH below 5.5 for a cumulative period of at least 25 hours within the 30 days before the clinical onset of tooth wear;\n\n(h) taking a drug from the specified list of drugs, on average at least daily, for a continuous period of at least the six months before the clinical onset of tooth wear, and where:\n\n(i) a dissolved solution of the drug is swilled around the teeth; or\n\n(ii) the drug is retained in the mouth adjacent to the affected site; or\n\n> Note: specified list of drugs is defined in the Schedule 1 - Dictionary.\n\n(i) breathing fumes of a substance from the specified list of acidic substances at a concentration of greater than 0.5 milligrams per cubic metre:\n\n(i) for a cumulative period of at least 1 000 hours before the clinical onset of tooth wear; and\n\n(ii) where that exposure has ceased, the clinical onset of tooth wear has occurred within six months of cessation;\n\n> Note: fumes and specified list of acidic substances are defined in the Schedule 1 - Dictionary.\n\n(j) vomiting or regurgitating gastric contents on at least 100 occasions within the one year before the clinical onset of tooth wear;\n\n(4) for dental abrasion only, breathing dust in air at a concentration of greater than five milligrams per cubic metre:\n\n(a) for a cumulative period of at least 10 000 hours before the clinical worsening of tooth wear; and\n\n(b) where that exposure has ceased, the clinical worsening of tooth wear has occurred within six months of cessation;\n\n> Note: dental abrasion and dust are defined in the Schedule 1 - Dictionary.\n\n(5) for dental attrition only, having bruxism at the time of the clinical worsening of tooth wear;\n\n> Note: dental attrition is defined in the Schedule 1 - Dictionary.\n\n(6) for dental erosion only:\n\n(a) consuming an average of at least 750 millilitres per day of any combination of drinks from the specified list of erosive drinks:\n\n(i) for a continuous period of at least two years before the clinical worsening of tooth wear; and\n\n(ii) where that exposure has ceased, the clinical worsening of tooth wear has occurred within one year of cessation;\n\nNote: dental erosion and specified list of erosive drinks are defined in the Schedule 1 \\- Dictionary.\n\n(b) having gastro-oesophageal reflux disease within the two years before the clinical worsening of tooth wear;\n\n(c) having an eating disorder at the time of the clinical worsening of tooth wear;\n\n(d) having alcohol use disorder at the time of the clinical worsening of tooth wear;\n\n(e) having xerostomia for at least the six months before the clinical worsening of tooth wear;\n\n> Note: xerostomia is defined in the Schedule 1 - Dictionary.\n\n(f) having hyperemesis gravidarum within the three months before the clinical worsening of tooth wear;\n\n> Note: hyperemesis gravidarum is defined in the Schedule 1 - Dictionary.\n\n(g) swimming in a swimming pool with a pH below 5.5 for a cumulative period of at least 25 hours within the 30 days before the clinical worsening of tooth wear;\n\n(h) taking a drug from the specified list of drugs, on average at least daily, for a continuous period of at least the six months before the clinical worsening of tooth wear, and where:\n\n(i) a dissolved solution of the drug is swilled around the teeth; or\n\n(ii) the drug is retained in the mouth adjacent to the affected site; or\n\n> Note: specified list of drugs is defined in the Schedule 1 - Dictionary.\n\n(i) breathing fumes of a substance from the specified list of acidic substances at a concentration of greater than 0.5 milligrams per cubic metre:\n\n(i) for a cumulative period of at least 1 000 hours before the clinical worsening of tooth wear; and\n\n(ii) where that exposure has ceased, the clinical worsening of tooth wear has occurred within six months of cessation;\n\n> Note: fumes and specified list of acidic substances are defined in the Schedule 1 - Dictionary.\n\n(j) vomiting or regurgitating gastric contents on at least 100 occasions within the one year before the clinical worsening of tooth wear;\n\n(7) inability to obtain appropriate clinical management for tooth wear.\n\n9 Relationship to service\n\n(1) The existence in a person of any factor referred to in section 8, must be related to the relevant service rendered by the person.\n\n(2) The factors set out in subsections 8(4) to 8(7) apply only to material contribution to, or aggravation of, tooth wear where the person's tooth wear was suffered or contracted before or during (but did not arise out of) the person's relevant service.\n\n10 Factors referring to an injury or disease covered by another Statement of Principles\n\nIn this Statement of Principles:\n\n(1) if a factor referred to in section 8 applies in relation to a person; and\n\n(2) that factor refers to an injury or disease in respect of which a Statement of Principles has been determined under subsection 196B(2) of the VEA;\n\nthen the factors in that Statement of Principles apply in accordance with the terms of that Statement of Principles as in force from time to time.\n\nSchedule 1 \\- Dictionary\n\nNote: See Section 5\n\n1 Definitions\n\nIn this instrument:\n\ndental abrasion means the loss of tooth substance through friction of exogenous material that is forced over the surfaces of the tooth, independent of occlusal contact.\n\ndental attrition means the loss of hard tooth substance from occlusal contact between an opposing tooth or teeth, or dental restoration or dental restorations.\n\ndental erosion means corrosion of tooth structure by a nonbacterial chemical, biochemical or electrochemical process.\n\ndust means airborne particulate matter consisting of poorly soluble solid particles of organic or inorganic matter, such as coal, grain, metal, rock or wood, of diameter between 0.5 micrometres and 75 micrometres, which settle slowly under the influence of gravity, and which are formed by natural forces or mechanical processes, such as crushing, grinding, milling, drilling, demolition, shovelling or sweeping.\n\nfumes means aerosols or vapours arising through industrial processes or from workplace practices that involve the refining, manufacture or use of the stated substance.\n\nhyperemesis gravidarum means a complication of pregnancy that is characterised by severe nausea and vomiting, with weight loss and dehydration.\n\nMRCA means the Military Rehabilitation and Compensation Act 2004.\n\nrelevant service means:\n\n(a) operational service under the VEA;\n\n(b) peacekeeping service under the VEA;\n\n(c) hazardous service under the VEA;\n\n(d) British nuclear test defence service under the VEA;\n\n(e) warlike service under the MRCA; or\n\n(f) non-warlike service under the MRCA.\n\n> Note: MRCA and VEA are also defined in the Schedule 1 - Dictionary.\n\nspecified list of acidic substances means:\n\n(a) hydrochloric acid;\n\n(b) hydrofluoric acid;\n\n(c) nitric acid;\n\n(d) phosphoric acid; or\n\n(e) sulphuric acid.\n\nspecified list of drugs means:\n\n(a) aspirin powder;\n\n(b) chewable aspirin tablets;\n\n(c) chewable hydrochloric acid tablets; or\n\n(d) chewable Vitamin C tablets.\n\nspecified list of erosive drinks means:\n\n(a) alcopops or alcoholic cooler drinks;\n\n(b) any beverage with a pH value below 4.0;\n\n(c) carbonated soft drinks;\n\n(d) flavoured mineral water;\n\n(e) herbal and fruit tea (without milk);\n\n(f) natural or processed citrus, apple or other acidic fruit juices;\n\n(g) non-calcium-enriched sports drinks; or\n\n(h) wine.\n\nterminal event means the proximate or ultimate cause of death and includes the following:\n\n(a) pneumonia;\n\n(b) respiratory failure;\n\n(c) cardiac arrest;\n\n(d) circulatory failure; or\n\n(e) cessation of brain function.\n\ntooth wear—see subsection 6(2).\n\nVEA means the Veterans' Entitlements Act 1986.\n\nxerostomia means dry mouth resulting from severely reduced saliva flow and which results from various medical conditions, including Sjogren's syndrome, or a wide variety of drugs, including anticholinergics, tricyclic antidepressants and amphetamines.\n\n> Note: Endnotes\n\n> Note: Endnote 1—About the endnotes\n\nThe endnotes provide information about this compilation and the compiled law.\n\nThe following endnotes are included in every compilation:\n\nEndnote 1—About the endnotes\n\nEndnote 2—Abbreviation key\n\nEndnote 3—Legislation history\n\nEndnote 4—Amendment history\n\nAbbreviation key—Endnote 2\n\nThe abbreviation key sets out abbreviations that may be used in the endnotes.\n\nLegislation history and amendment history—Endnotes 3 and 4\n\nAmending laws are annotated in the legislation history and amendment history.\n\nThe legislation history in endnote 3 provides information about each law that has amended (or will amend) the compiled law. The information includes commencement details for amending laws and details of any application, saving or transitional provisions that are not included in this compilation.\n\nThe amendment history in endnote 4 provides information about amendments at the provision (generally section or equivalent) level. It also includes information about any provision of the compiled law that has been repealed in accordance with a provision of the law.\n\nMisdescribed amendments\n\nA misdescribed amendment is an amendment that does not accurately describe the amendment to be made. If, despite the misdescription, the amendment can be given effect as intended, the amendment is incorporated into the compiled law and the abbreviation “(md)” added to the details of the amendment included in the amendment history.\n\nIf a misdescribed amendment cannot be given effect as intended, the abbreviation “(md not incorp)” is added to the details of the amendment included in the amendment history.\n\n> Note: Endnote 2—Abbreviation key\n\n|                                                | o = order(s)                        |\n| ---------------------------------------------- | ----------------------------------- |\n| ad = added or inserted                         | Ord = Ordinance                     |\n| am = amended                                   | orig = original                     |\n| amdt = amendment                               | par = paragraph(s)/subparagraph(s)  |\n| c = clause(s)                                  | /sub‑subparagraph(s)                |\n| C[x] = Compilation No. x                       | pres = present                      |\n| Ch = Chapter(s)                                | prev = previous                     |\n| def = definition(s)                            | (prev…) = previously                |\n| Dict = Dictionary                              | Pt = Part(s)                        |\n| disallowed = disallowed by Parliament          | r = regulation(s)/rule(s)           |\n| Div = Division(s)                              |                                     |\n| exp = expires/expired or ceases/ceased to have | reloc = relocated                   |\n| effect                                         | renum = renumbered                  |\n| F = Federal Register of Legislation            | rep = repealed                      |\n| gaz = gazette                                  | rs = repealed and substituted       |\n| LA = Legislation Act 2003                      | s = section(s)/subsection(s)        |\n| LIA = Legislative Instruments Act 2003         | Sch = Schedule(s)                   |\n| (md) = misdescribed amendment can be given     | Sdiv = Subdivision(s)               |\n| effect                                         | SLI = Select Legislative Instrument |\n| (md not incorp) = misdescribed amendment       | SR = Statutory Rules                |\n| cannot be given effect                         | Sub‑Ch = Sub‑Chapter(s)             |\n| mod = modified/modification                    | SubPt = Subpart(s)                  |\n| No. = Number(s)                                | underlining = whole or part not     |\n|                                                | commenced or to be commenced        |\n\n> Note: Endnote 3—Legislation history\n\n| Name                                                                                             | Registration              | Commencement      | Application, saving and transitional provisions |\n| ------------------------------------------------------------------------------------------------ | ------------------------- | ----------------- | ----------------------------------------------- |\n| Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 52 of 2017)           | 21 August 2017F2017L01059 | 18 September 2017 |                                                 |\n| Amendment Statement of Principles concerning tooth wear (Reasonable Hypothesis) (No. 85 of 2018) | 27 August 2018F2018L01169 | 24 September 2018 |                                                 |\n\n> Note: Endnote 4—Amendment history\n\n| Provision affected      | How affected       |\n| ----------------------- | ------------------ |\n| Section 8(3)(j)………..... | ad. No. 85 of 2018 |\n| Section 8(6)(j)……..…... | ad. No. 85 of 2018 |","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"This compilation includes an amendment (No. 85 of 2018) that broadened the list of qualifying erosion factors by adding vomiting or regurgitating gastric contents on at least 100 occasions within the one year before clinical onset or worsening as specific qualifying factors (sections 8(3)(j) and 8(6)(j)). That amendment expanded the SOP's coverage of erosion-related mechanisms (increasing the range of clinical scenarios that can raise a reasonable hypothesis, particularly where frequent vomiting/regurgitation is present) and therefore materially broadened the SOP's practical scope compared with the original instrument."},"complexity_factors":["Multiple, specific numeric thresholds (e.g. >= 750 mL/day, >5 mg/m3, >0.5 mg/m3, 10,000 cumulative hours, 1,000 cumulative hours, 25 hours in 30 days, 100 vomiting occasions) in section 8","Several nested conditional provisions (separate rules for onset vs clinical worsening: sections 8(1)-(3) and 8(4)-(6))","Cross-references to other instruments and legislation (VEA, MRCA and other Statements of Principles) — sections 3, 4 and 10","Defined technical terms collected in Schedule 1 (dental abrasion/attrition/erosion, dust, fumes, xerostomia, terminal event, specified lists of substances/drugs/drinks)","Different legal tests for 'material contribution' or 'aggravation' where pre-existing tooth wear existed before/during service (section 9(2))","Requirement for clinical confirmation using a recognised tooth wear evaluation system (section 6(2)(c)) — introduces dependence on specialist reports","Multiple overlapping medical and behavioural risk factors (GERD, eating disorders, alcohol use disorder, vomiting, bruxism) that can interact and require cross-application of other SOPs (section 10)","Amendment history that inserted additional factors after initial issue (see endnotes and amendment history)"],"plain_english_summary":"**What this instrument is and who it affects**\n\n- This Statement of Principles (SOP) sets out the medical and factual conditions the Repatriation Medical Authority uses to decide whether \"tooth wear\" (or death contributed to by tooth wear) can be connected to a person's military or peacekeeping service for the purpose of veterans' entitlements under the VEA or the MRCA (see sections 3, 4 and 6).\n- It affects veterans, members of Peacekeeping Forces and members of the Forces covered by the Military Rehabilitation and Compensation Act — essentially claimants seeking service connection for tooth wear or death from tooth wear.\n\n**What the law does, mechanically**\n\n- Defines the injury: \"tooth wear\" is a measurable loss of dental hard tissue (enamel, dentine or restorative material) caused by mechanical or chemical processes, with exposed dentine producing significant pain/sensitivity or impairment and confirmed by a dental clinician using a recognised evaluation system (section 6(2)). Mild enamel-only wear, caries and isolated trauma are excluded (section 6(2)(e)).\n\n- Lists the specific factual/medical factors that must exist to raise a \"reasonable hypothesis\" that tooth wear is related to service (section 8). At least one listed factor must be present. The factors are grouped by mechanism of tooth wear: abrasion, attrition and erosion. Examples (all drawn from section 8):\n  - Abrasion: breathing dust > 5 mg/m3 for at least 10,000 cumulative hours before clinical onset (s 8(1)); the same threshold applies to clinical worsening (s 8(4)).\n  - Attrition: presence of bruxism (teeth grinding) at the time of clinical onset or worsening (s 8(2), 8(5)).\n  - Erosion: multiple possible causes can qualify, including:\n    - consuming an average of >= 750 mL/day of specified erosive drinks for at least two continuous years before clinical onset (or worsening) and onset/worsening within one year of cessation (s 8(3)(a), 8(6)(a));\n    - gastro-oesophageal reflux disease (GERD) within two years before onset/worsening (s 8(3)(b), 8(6)(b));\n    - eating disorder, alcohol use disorder, xerostomia (dry mouth) for at least six months, or hyperemesis gravidarum within three months, at or before clinical onset/worsening (s 8(3)(c)-(f), 8(6)(c)-(f));\n    - swimming in a pool with pH < 5.5 for at least 25 cumulative hours in the 30 days before onset/worsening (s 8(3)(g), 8(6)(g));\n    - daily use, for six continuous months, of certain specified chewable/ soluble drugs retained or swilled in the mouth (s 8(3)(h), 8(6)(h));\n    - breathing fumes of certain acidic substances at > 0.5 mg/m3 for at least 1,000 cumulative hours before onset/worsening (s 8(3)(i), 8(6)(i));\n    - vomiting or regurgitating gastric contents on at least 100 occasions within the year before onset (or worsening) (s 8(3)(j), 8(6)(j)).\n\n- Confirms death: \"death from tooth wear\" is included where the tooth wear contributed to a terminal event or condition that led to death (s 6(5)).\n\n- Requires a service link: any factor relied on must be related to the person's \"relevant service\" (section 9(1)). Some factors (those in s 8(4)–8(7)) apply only where the tooth wear existed before or during service and the service materially contributed to or aggravated it (s 9(2)).\n\n- Cross-references other SOPs: where a factor in this SOP refers to a separate injury or disease that itself has an SOP, the other SOP's rules apply to that injury/disease (section 10).\n\n**Why this matters in practice**\n\n- This document is not clinical guidance; it is a legal-standard instrument used to decide entitlement. Decision-makers will check the claimant's medical records, occupational/environmental history and other evidence against the numerical thresholds, timing windows and definitions in this SOP (for example, exposure concentrations, cumulative hours, diagnosis timing and beverage volumes).\n- The SOP narrows what evidence will satisfy a \"reasonable hypothesis\" connecting tooth wear to service. For claimants, that shapes what history, monitoring data and clinician findings they need to collect and present (see sections 6, 8 and the Dictionary).\n\n**Costs, incentives and implementation points to note**\n\n- Who pays/decides: assessment decisions using this SOP determine whether government entitlements (medical/compensation benefits) are available; the Repatriation Medical Authority provides the SOP; decision-makers apply it to individual claims (ss 3–4, 8–9).\n- Evidence burden: several factors require quantitative proof that may be difficult to obtain after the fact (e.g. demonstrating cumulative exposure of 10,000 hours to dust at >5 mg/m3 (s 8(1),(4)); or proving average daily consumption of >=750 mL of specified erosive drinks over two continuous years (s 8(3)(a),(6)(a))). Occupational/environmental measurement data, contemporaneous clinical notes, or reliable witness statements will be important.\n- Compliance/administrative cost: claimants may need dental specialist reports using a recognised tooth wear evaluation system (s 6(2)(c)), and documentary evidence for exposures, diagnoses or behaviours (e.g. GERD diagnosis, documented bruxism, records of pool pH or prescribed drugs).\n- Discrete vs overlapping causes: many erosion factors mirror non-service causes (e.g. GERD, eating disorders, alcohol use, vomiting). Section 10 requires applying other SOPs where these factors overlap with separate injuries/diseases, which can produce layered assessment and cross-referencing of evidence.\n- Implementation risk: thresholds based on concentrations (mg/m3), pH levels and specified time windows create points of contention in adjudication; quantifying \"breathing fumes\" or pool pH exposure may be technically challenging and may require expert evidence.\n\n**Trade-offs and likely incentives**\n\n- The SOP concentrates benefits on claimants who can document specific, often high or sustained, exposures/conditions (for example, long cumulative occupational dust exposure or prolonged high consumption of acidic drinks). That creates a practical incentive for claimants and clinicians to preserve or reconstruct specific exposure and clinical records.\n- It places a verification cost on both claimants and the decision system — collecting or commissioning expert evidence to meet specified thresholds — which may deter marginal claims but increase administrative load for clearly documented ones (see section 8 and the Dictionary).\n\n**Key statutory references**\n\n- Definition and scope of \"tooth wear\": section 6(2).\n- List of qualifying factors and numerical thresholds: section 8 (subsections 8(1)–8(7)).\n- Requirement that factors be linked to \"relevant service\": section 9.\n- Cross‑application with other Statements of Principles: section 10.\n- Definitions and specified lists (erosive drinks, acidic substances, drugs, dust, xerostomia, terminal event, relevant service): Schedule 1 (Dictionary).\n\n**Bottom line**\n\nThis SOP provides the objective definitions, numeric thresholds and timing rules used to form a \"reasonable hypothesis\" that tooth wear (or death contributed to by tooth wear) is related to relevant military or peacekeeping service. It narrows and clarifies what clinical findings and exposure histories will satisfy entitlement decision-makers, and therefore determines the practical evidence claimants must produce. (See sections 6, 8, 9 and Schedule 1.)"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This legislation maintains its original narrow scope. It is a specific medical-determination instrument for a single condition (tooth wear) under the veterans' compensation scheme. The 2018 amendment added two factors (8(3)(j) and 8(6)(j)) concerning vomiting/regurgitation, but this expanded the medical bases within the existing framework rather than broadening the legislation's purpose beyond determining service connection for tooth wear claims."},"complexity_factors":["Multiple defined terms (15+ definitions in Schedule 1 including technical medical terms like 'xerostomia', 'hyperemesis gravidarum', and 'bruxism')","Parallel structure for onset vs worsening — factors in section 8 are duplicated for 'clinical onset' (subsections 1-3) and 'clinical worsening' (subsections 4-6), creating repetition but also conditional complexity","Specific quantitative thresholds requiring precise measurement (e.g., '10,000 hours' dust exposure, '750 millilitres per day' of drinks, 'pH below 5.5', '100 occasions' of vomiting)","Time-bound conditions with varying windows (6 months, 1 year, 2 years, 3 years, 30 days) that differ by factor","Nested exclusions in the definition of tooth wear (subsection 6(2)(e)) excluding mild wear and caries","Cross-referencing to other Statements of Principles (section 10) for conditions like eating disorders or alcohol use disorder","Dual legislative framework application — applies to both VEA and MRCA claims with different service definitions","Specific lists requiring lookup (specified list of erosive drinks, specified list of drugs, specified list of acidic substances)"],"plain_english_summary":"This Statement of Principles sets medical rules the Repatriation Medical Authority uses to decide if serious tooth wear in veterans or defence members is connected to service for compensation. It provides a checklist of service-related exposures and conditions—if at least one applies and links to service, a “reasonable hypothesis” of service connection exists. It covers severe abrasion, attrition, and erosion (dentine exposure causing pain or dysfunction), not mild wear or decay."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017","history":"/api/acts/statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017/history","analysis":"/api/acts/statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017/analysis","conflicts":"/api/acts/statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017/conflicts","importantCases":"/api/acts/statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017/important-cases","documents":"/api/acts/statement-of-principles-concerning-tooth-wear-reasonable-hypothesis-no-52-of-2017/documents"}}