A disadvantage of using a big ortho group. Finished invisalign; had refinement to close a black triangle between2 front teeth. Different ortho did IPR the entire length of tooth vs. the lower 1/3; evidently she didn't know plan. Didn't close triangle; looks the same. Ortho now says to have more IPR. They already shaved .5mm. How much IPR can one tooth have? How risky is this? ANy other options besides bonding/veneers?
August 17, 2012
Answer: EXCESSIVE IPR ?
In most Invisalign cases I have seen IPR (interproximal reduction) in the range of .6 to 1 mm depending on the location and position of the tooth. In some teeth you can remove as much as 1 to 2 mm (such as maxillary central incisors), without affecting the health of the tooch.
If there is a black triangle, you cannot just shave the .lower third of the tooth. You have to create a space between the two teeth so you can move them closer to each other.
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August 17, 2012
Answer: EXCESSIVE IPR ?
In most Invisalign cases I have seen IPR (interproximal reduction) in the range of .6 to 1 mm depending on the location and position of the tooth. In some teeth you can remove as much as 1 to 2 mm (such as maxillary central incisors), without affecting the health of the tooch.
If there is a black triangle, you cannot just shave the .lower third of the tooth. You have to create a space between the two teeth so you can move them closer to each other.
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August 17, 2012
Answer: Extensive IPR can safely be done
Although your question doesn't indicate whether the "black triangle" was on the upper or lower, I assume that the upper front teeth is the problem area. If you are saying that .5mm was removed on each tooth, that seems more than is typical of Invisalign cases. However, IPR can be done safely to remove the majority of the enamel (as there still is some enamel remaining for protection) which would be at least 2mm thick at the contact area of each of the upper central incisors. So doubling the IPR of .5 mm still should be no problem. Other questions remain in terms of esthetics, relating to the size and shape of the central incisor teeth as well as the adjacent teeth to create the best result, however your question of the safety of additional IPR is at least answered.
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August 17, 2012
Answer: Extensive IPR can safely be done
Although your question doesn't indicate whether the "black triangle" was on the upper or lower, I assume that the upper front teeth is the problem area. If you are saying that .5mm was removed on each tooth, that seems more than is typical of Invisalign cases. However, IPR can be done safely to remove the majority of the enamel (as there still is some enamel remaining for protection) which would be at least 2mm thick at the contact area of each of the upper central incisors. So doubling the IPR of .5 mm still should be no problem. Other questions remain in terms of esthetics, relating to the size and shape of the central incisor teeth as well as the adjacent teeth to create the best result, however your question of the safety of additional IPR is at least answered.
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