My Courses Forums Synapse Orthodontics: General Sample test Reply To: Sample test

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    Chad Carter (Course Director)

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    January 11, 2023 at 4:45 am

    Joti, Fantastic Questions!

    Here are a couple of my thoughts:

    1) Protrusive vs. Normal Maxilla – Yes, I agree that the mandible is clearly retrusive. Now for the maxilla I would consider a couple items. First, if you using SNA the ABO likes the norm of 82 with a standard deviation of about 3 degrees. In addition, her cranial base angle (FH – SN) just a touch off the standard of 7 degrees which also affects SNA. So for me that gets me to the same point of is this a protrusive or normal maxilla?? Then I start looking at the Position of the max incisors – considering AP position and proclination. I agree those max incisors look proclined – then when I see there is a diastema and space to close I start thinking “Yup, I’ll use that space to help me upright incisors a bit”. Now in the AP position of those max incisors I like to use Andrews Anterior Limit Goal line based on Glabella. Looking at her profile I think her max incisors are in a good AP position. So this is a long answer to say after all these considerations I then come down with – Ok, I don’t want to move her maxilla in the AP. That is where the rubber meets the road – is it something you are going to treat? That is my analysis of why the board suggested answers does not include protrusive maxilla. NOW REALITY! Remember the board doesn’t mark “wrong” answers to you could in your list of responses type “Protrusive maxilla” if you diagnose that as the case but just be mindful of what your upcoming treatment will encompass. Is there a dental/skeletal objective where you will address that issue?


    2) Proclined Incisors – I agree the numbers show proclination. As I mentioned above, I think the max incisors have space to work with in aligning. In addition, the AP position of the max incisors based on the anterior goal line from her forehead and incisal display are where I am comfortable keeping them. The man incisors make me think extraction for sure and in order to maximize the advancement and leveling the curve of spee as well. The catch is that there is minimal crowding. Now, the suggested ABO answer is non-extraction but notice that it’s not a “deal breaker” answer. I think there is plenty here that you’ll knock it out of the park with your assessment.


    Keep up the great work!