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One further document, the notes from the Feb 7 meeting are also posted in the document section.

Hi Penni,   Hopefully this will be discussed as an agenda item, but I thought I would post a response as well.  I believe that Dental calculus (disorder) should have the associated morphology of Calculus (morphologic abnormality). In medicine, calculus means the precipitation of minerals which then aggregate. Dental plaque composes of cells, proteins, sugars and fats which provide a structure for the calcification process and the build-up of minerals. So it fits the definition of calculus. I feel this defines the concept better than the Accretion (morphologic abnormality) value. This paper defines dental calulus quite well: https://www.ncbi.nlm.nih.gov/pubmed/9395117 https://www.ncbi.nlm.nih.gov/pubmed/9395117.   Best wishes, Sarah

We are currently finalizing plans for a face to face meeting associated with the business meeting in London.  Tentatively, we anticipate meeting on Monday, April 24 all day and Tuesday, April 25 for  half a day, likely in the morning. The business meeting is taking place once again at the Amba, Charring Cross Hotel and I anticipate our meetings will be in the same location. Among other agenda items,, we will be reviewing the status of the odontogram and a possible ref set that could be used to define it, methods to effectively model dental caries (Dr. Warren's response in that discussions string will be the starting point for that discussion),  and likely reviewing many additional terms that may be advanced through the USA.  There is also a need to take another look at periodontics, as it appears the international community has redefined certain terms since we last reviewed not long ago. Finally,the March 1 teleconference is cancelled, due to a conflict with the new USA standards process meeting for SNODENT, which has been scheduled for that day. Due to previously scheduled personal conflicts, I am unable to push it to the week before or either of the two weeks after.  Therefore, our next meeting will be the face to face meeting in London. You may contact me directly with any further questions.  Thanks again to all of you for  your time and efforts.   Mark

The intent is to represent dental caries.  In order to do so with an expression, the following terms ahve been recommended: Active Primary Caries Non-active Primary Caries Active Secondary Caries Non-active Secondary Caries   I (Mark Jurkovich) then questioned this relative to determining activity and my email follows:   I am not sure that I am comfortable with this.  Please help me understand this a little better.   Primary and secondary are observations and very easy clinically to identify the difference.  I have no problem when they are properly defined.  I am still not quite sure if primary caries would be a finding, disorder, or morphologic abnormality or all of the above.    My problem is with active/non-active. I struggle with them.  I know the cariologist's have a definition, but struggle with the idea that these are (accurate) observations, or findings as they are simply the best opinion (differential diagnosis) of a clinician.  Thus, I see this as possibly combining two concepts from different hierarchies.  It is again my opinion that it is very important for dentistry to begin to understand active vs non-active and I am not sure that clinicians can properly make those determinations yet or we are at a point where we can make these with any level of validity.   Am I correct in my reasoning?  If not or you see this differently, please explain it for me.  If my reasoning is rational, is this the best way for us to go?   I just don't see how we can parse Active primary caries so it will follow compositional grammar without potentially mis-representing the concept to "game" the system.   Help in understanding would be appreciated.   Joel White responded promptly with additional information: Primary and Recurrent (secondary) are easily defined.  Primary is caries occurring on tooth surfaces.  Recurrent (secondary) caries are caries that occur on tooth surfaces that have been previously restored, i.e. adjacent to a restoration.  If you need a citation or better definition for this let me know.   Active and non-active are also easily observable clinically and definable.  See table 3 in the attached paper and copied below.    In my view, we can certainly have caries terms without active and non-active, however, we MUST have activity as this is the standard in dentistry.  So many people simply don’t want to deal with activity, however, it is the standard in cariology.   The issue of an accurate diagnosis is not one of terminology, it is one of education.  Caries activity are used in the ADA classification of caries and in ICDAS and ICCMS.    We all struggle with activity in rendering a diagnosis.  Simply put, if a patient has moderate or high caries risk, without sufficient prevention and has enamel lesions, they are active.  If a patient has low and moderate caries risk and has and uses prevention with white spot lesions, the lesions are considered non active.  If there are enamel lesions without evidence of progression clinically or radiographically or both, then these are non-active lesions.  If there are enamel lesions with evidence of progression clinically or radiographically or both, then these are active lesions.  These are just some general principles.  The surface characteristics are what are used most for determining activity in the ADA classification and ICDAS classification system, based on clinical examination.    All of the above are for clinicians understanding of activity, from a terminology perspective, we simply need to have the terms.   Tooth, site, activity and extent are all needed for a caries diagnosis.  Activity is used (and taught) currently, and not having activity continues to be a significant omission.  The goal is to have the very best terms in SNOMED.    IF as a compromise, we want to have as parents, caries diagnosis without activity, as options for those who don’t want to deal with activity, that would be ok with me.  As long as we have the children of these terms having the granularity of active and non-active.    We need to have activity for those of who use it and to conform with modern caries diagnosis.    Joel also provided a chart of active vs non-active caries activity from Ekstrand.  I am unable to copy it here, but can forward it via email if you wish to see it. Mark Jurkovich then added clarification to his initial request as follows:     Thanks for responding. I guess I was not very clear as to where we might want/need consensus. I absolutely agree with you regarding primary and secondary caries.  In fact, these have the definitions you cite, when stating primary caries or secondary caries as morphologic abnormalities, but not if we refer to them as primary dental caries.  This term is a disorder and a synonym of enamel caries. I do not believe that to be correct. The clarity of the definitions (basically caries associated with (secondary) or not associated with (primary) a current restoration in the tooth) makes this a much easier term to work with.    I am also aware of both classification systems and absolutely want to represent the various pieces of what we know or how we currently classify caries and make it available within SNOMED CT.  NO resistance from me, just want to get it right going forward. Your explanation of active/non-active is precisely what I am getting at.  Your description talks about the many factors we consider in determining caries risk to help us evaluate activity (among other factors).  Additionally, determining hard vs soft and color differences are simply not as concrete as what we use to describe primary and secondary.  In my mind, primary and secondary are absolutes and (usually) easy to identify.  Active/non-active is much more an opinion that is based on many factors, therefore much more of a differential diagnosis, again in my mind.   To my way of thinking, this creates several potential (possibly theoretical however) problems: 1)  We would be combining two different concepts into a single concept (I am OK with that), but creating quality definitions might be very difficult. for primary active, primary non-active, secondary active and secondary non-active, particularly since there are differences in how we (and the chart you included) interpret activity depending on whether it is enamel or dentin related.   2) The current terms for primary and secondary caries as well as when activity is added are morphologic abnormalities which is part of the body structure concept tree within SCT. To date, we have just one parent for each of the terms, caries, which leads to necrosis, which eventually leads to body structure.  If we instead wish to have this as a disorder (Dental caries), we have five parents, including bacterial infection and  that includes infection and oral lesion, which may make deeper analytics into relationships with other diseases much easier from a developing of algorithms standpoint. 3)  As we add attributes (building blocks) to further refine and allow for greater granularity, we need to make sure these follow compositional grammar rules and that they can be properly parsed. Though I have not tested it, I would think that we would be able to do this, whether we consider caries a morphologic abnormality or a disorder. 4)  It might be important to ask cariologists internationally if they are comfortable with listing caries as a morphologic abnormality rather than a disorder. 5)  The clean up of caries related terms as well as determining which terms really need to be fully defined will change, based on the approach taken above.  Your comments help add clarity and provide a basis for looking deeper into this.  Much appreciated.  I have added Dr. Sarah Warren from Great Britain and Jean Narcisi to this string at their requests. I hope my clarification provided helps you see better the issues as I perceive them.  Additional help in understanding further would be much appreciated.  Again, if you feel I am missing something basic or something that seems clear to you, perhaps we should have a conversation.  I would really like to get to a superior working model in the next few weeks. The discussion continued with several email exchanges between Mark Jurkovich and Joel White. Sarah WArren then rpovided a suggestion and recommendation which appears as the last of the emails in this string: Dear Mark,   I agree that we need to clean up the relationships in SNOMED CT regarding caries terms.  These are constraining and confusing us.  Dental caries is the parent, with many children and siblings.  Dental caries and periodontitis are both disorders, I doubt we will be changing these relationships.  From what I see about the hierarchy, looking up, dental caries is in the correct place.   It might be helpful to see the terms and the relationships.   From what I understand, there are limitations on the way that we can assemble concepts into an accurate expression.   What is proposed is a work around.  The terms are accurate.   Primary active Primary non-active Recurrent active Recurrent non-active   These are definable.   As far as how they fit in the hierarchy and how relationships are determined, I don’t know and have not seen them.  It would seem logical to have primary caries and recurrent caries as children of dental caries.  Arrested caries is also a disorder and a child of dental caries.   I agree with what you have uncovered, Primary is simply not in the right place, this can be corrected.   As a suggestion:   Dental caries with children being Primary and Recurrent caries (along with Arrested Caries that is already there)   Primary caries with a child primary active caries Recurrent caries with a child recurrent active caries Arrested caries with a child arrested primary caries Arrested caries with a child arrested recurrent caries     Joel M. White, DDS, MS   Just to clarify so that we can continue this string: As an example, for the term primary caries having a child of primary active caries,  Should this be listed as a disorder or a s a morphologic abnormality? I think you are suggesting disorder, but just want to verify. Also, do you suggest adding to the descriptor the word dental (i.e primary dental caries and then a child of recurrent non-active dental caries? Could you provide a definition for recurrent non-active, taking into account that it needs to reflect both enamel and dentin level caries?  I really need help here. I think Jorn Andre and the editors have tended to lean towards using the morphologic abnormality hierarchy, so we need to hear that viewpoint. Thanks again Joel.  This helps move the discussion along and helps me better define options. https://ssl.gstatic.com/ui/v1/icons/mail/images/cleardot.gif Dear Mark,   I had not considered the morphologic abnormality.    For me the term is all a disorder as it describes dental caries.  Considering what we have to work with for dental caries and what was done with periodontal disease, the more granular terms are all children of dental caries.   We may have painted ourselves into a corner, with the extent of disease being anatomic, but this is only the extent of disease.   I am still learning about the relationships, and we can both see what the editors have to say.   For me, dental caries is the disorder and the additional descriptions are part of further defining the disorder with more granular terms.   My suggestion is to define each of the components of the terms separately and then put them together.   Overall, caries occurs in a discrete location beginning on the exterior of the tooth.  Caries can begin on enamel, dentin and cementum.  (Do we need to get into coronal and root caries, or save this for later?)     Primary-Caries occurring on tooth surfaces.  (a virgin tooth surface, having never been restored)   Recurrent-Caries occurring on the tooth surfaces adjacent to a restoration.  (where the carious lesion has contact with the restoration)   Active-A caries lesion that is progressing, continuing to lose tooth structure (mineral) that is in a plaque stagnation area, has thick and/or sticky plaque over the lesion surface.  The surface appearance is matt/opaque/loss of luster.  The surface has a tactile feeling of rough on the enamel and soft on the dentin.  If the lesion is located near the gingiva, the gingiva is inflamed and with pleading on probing.   Non-active-A caries lesion that is not progressing, arrested, not losing tooth structure (mineral) that is not in a plaque stagnation area, and the plaque on the surface is not thick or sticky.  The surface appearance is shiny.  Tactile feeling is smooth and hard for enamel and dentin.  If the lesion is near the gingiva there is no inflammation and no bleeding on probing.   So, Primary active caries is:  Caries occurring on tooth surfaces where the lesion is progressing, continuing to lose tooth structure (mineral) that is in a plaque stagnation area, has thick and/or sticky plaque over the lesion surface.  The surface appearance is matt/opaque/loss of luster.  The surface has a tactile feeling of rough on the enamel and soft on the dentin.  If the lesion is located near the gingiva, the gingiva is inflamed and with pleading on probing.    And so forth.   Does this help?   Hello,   I believe dental caries should be a disorder as it would be used to record a diagnosis. From my understanding (please correct me if I’m wrong), morphologic abnormalities are used as attribute values to define concepts and would not be used in patient records in the place of concepts from the clinical finding hierarchy i.e. disorders. So morphologic abnormality concepts are for refining other concepts rather than to be used as concepts in a record themselves. I noted that 80967001 | Dental caries (disorder) is fully defined having the associated morphology attribute with value 65413006 | Caries (morphologic abnormality).   https://confluence.ihtsdotools.org/display/DOCEG/6.6.1+Morphologic+abnormalities+vs.+Findings https://confluence.ihtsdotools.org/display/DOCEG/6.6.1+Morphologic+abnormalities+vs.+Findings   So having caries in the morphological abnormality sub-hierarchy and the disorder sub-hierarchy are needed.   Having the below added as morphologic abnormalities will allow these to be used as defining characteristics rather than as terms a clinician would select.   Active secondary dental caries Active primary dental caries Non-active secondary dental caries Non-active primary dental caries   I agree that active and inactive caries statuses pose a risk of not being 100% accurately used by dentists. However, they are terms useful to diagnose types of caries and document their status. As previously mentioned in the email thread, 80967001 | Dental caries (disorder) concept has a child concept of arrested caries already 80753001 | Arrested dental caries (disorder).   I agree with Mark, the concept 80353004 | Enamel caries (disorder) has an incorrect synonym of ‘primary dental caries’. This synonym would need to be retired and a new concept would need to be produced as a child of 80967001 | Dental caries (disorder).   Visually this could look like:   Dental Caries (disorder) -       Primary caries (disorder) o   Primary active caries (disorder) -       Secondary caries (disorder) o   Secondary active caries (disorder) -       Arrested caries(disorder) o   Arrested primary caries (disorder) o   Arrested secondary caries (disorder)       Kind regards,   Sarah

Hi Penni,   I would also say that enamel spur is not a disorder, more a clinical finding. However, as the parents Congenital anomaly of tooth (disorder), Developmental abnormality of tooth size and form (disorder) and Disorders of hard tissues of teeth (disorder) are all disorders I guess this is the logical place in the hierarchy. I think Exostosis of jaw (disorder) is incorrect as this relates to bony outgrowths of which an enamel spur is not.   The following paper defines enamel pearls/enamel spurs quite nicely: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3981278/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3981278/. I can’t see any morphological abnormality that would cover the developmental anomaly of enamel formation on the root surface and Osteophyte (morphologic abnormality) refers to bone so I believe is incorrect for this concept.   The closest match would possibly be Developmental anomaly (morphologic abnormality) inferred from its parents Congenital anomaly of tooth (disorder) and Developmental abnormality of tooth size and form (disorder).   Best wishes, Sarah

This is a good example:Screen Shot 2017-01-04 at 11.00.59 AM.png

Congratulations Jorn!!  Your work has been just great I can't wait to see a National implementation!

I think gingivae and gingiva may be synonyms, simply different spelling.  I am not sure gingivae is used as a plural of gingiva.

Mark, thanks again for your emails. It strongly appears that the general dentistry refset the Dentistry SIG is developing will be a good fit to requirements for New Zealand's national electronic oral health record solution for publicly funded dental services.