What the heck!
I was just reading about resorbtion, something about roots dissolving, my ortho never even brought that up...is this something we need to worry about? I feel like that should have been part of the conversation from the beginning, and now I have yet something else to worry about.
Can anyone shed light on this? Are my teeth going to dissolve????
resorbtion (sp?)
Moderator: bbsadmin
It's if the teeth moved (pushed) too fast. Nothing to worry about if your Ortho knows what is going on. As most do.That's why some or many adults given the genric 2 years, can go on for 3 or even 4 years. If your old hardened bones make movement slow, so be it, better to creep the teeth into position at the slowest pace possible vs forcing them.
That's it in a nutshell for adults.
There other traumas related of course.
Google be your friend..
That's it in a nutshell for adults.
There other traumas related of course.
Google be your friend..
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macgirl4ever
- Posts: 204
- Joined: Fri Feb 27, 2009 3:38 pm
- Location: Florida
- Contact:
I don't think that even the best orthodontist can completely guarantee that root resorption will happen. I did a lot of research before I chose to get braces as an adult and knew there was a good chance, being a second time ortho patient, that my roots might shorten.
At my last adjustment, my orthodontist showed my panorex at the beginning of treatment and my most recent one. My lower incisors have lost some of their root but my treatment is almost over. While it is not ideal, knowing that I CAN NOT do another round of orthodontics will make me much more rigorous with my retention.
At my last adjustment, my orthodontist showed my panorex at the beginning of treatment and my most recent one. My lower incisors have lost some of their root but my treatment is almost over. While it is not ideal, knowing that I CAN NOT do another round of orthodontics will make me much more rigorous with my retention.
Braced: 20 months March 2009-November 2010
Interesting. I kind of knew about some of this going in.. but didn't really do the research. Does root resorption/shrinkage, happen with everybody? Youth, adults alike? What is the effect.. weaker teeth?
And kind of off topic.. if teeth are so hard to move in adult mouths, why is relapse easier? You'd think that if the bone is that hard and immovable/unchangeable, that the teeth would be more prone to stay in place when all is said and done. ??
And kind of off topic.. if teeth are so hard to move in adult mouths, why is relapse easier? You'd think that if the bone is that hard and immovable/unchangeable, that the teeth would be more prone to stay in place when all is said and done. ??
WOO HOO!!!
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footpounds
- Posts: 40
- Joined: Fri Apr 16, 2010 11:15 am
- Location: The Ether
To me it seems logical to assume that the SLOWER your teeth are realigned, the SLOWER they would be inclined to shift back. I wonder about these people that say they see movement after only one or two days in braces. Seems to me that if they moved that fast, they can move BACK to their original positions just as fast.
I've researched the topic and here's what I've found......1) root reabsorption occurs more often in maxillary incisors and premolars 2) a small percentage of the population have a genetic predisposition toward root resorption anyway and braces can exacerbate situation 3) the longer you wear braces, the higher the risk of resorption (one scholarly journal quoted applicance treatment exceeding 6 months with possible severe resorption occuring at 2.3 years) 4) teeth with conical or incomplete root formation are at a higher risk. 5) severe root resorption to the point of teeth falling out years later only occurs in a VERY SMALL percentage of the population (probably those people already at risk) There doesn't seem to be any connection between root resorption and gender, however.
I'm only presenting what I've read in medical journals and scholarly articles - I'm not an expert, but I do want to know what the risks are considering I'm in the same boat as the rest of you. Orthos are supposed to check for this beforehand to determine whether or not you are a good candidate for braces; one would think they would tell you if you were not.
I'm only presenting what I've read in medical journals and scholarly articles - I'm not an expert, but I do want to know what the risks are considering I'm in the same boat as the rest of you. Orthos are supposed to check for this beforehand to determine whether or not you are a good candidate for braces; one would think they would tell you if you were not.
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BraceFace2o1o
- Posts: 980
- Joined: Sat Oct 18, 2008 10:00 pm
The Orthodonist I spoke to the other day said, that some root resorption is quite common, about 1-2mm and wont do any harm. I should imagine more severe root resoprtion is when one should start to worry.
Braces: Metal fixed upper and lower
Estimated treatment time: 18-24 months
Braces Removed: August 2013 (after 33 months in braces)
Retainers: Upper & lower essix and lower bonded
My Story / Before & After photos
Estimated treatment time: 18-24 months
Braces Removed: August 2013 (after 33 months in braces)
Retainers: Upper & lower essix and lower bonded
My Story / Before & After photos
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BraceFace2o1o
- Posts: 980
- Joined: Sat Oct 18, 2008 10:00 pm
Just wanted to add... I don't know much about the subject, just REPEATING what an Ortho told me.
Braces: Metal fixed upper and lower
Estimated treatment time: 18-24 months
Braces Removed: August 2013 (after 33 months in braces)
Retainers: Upper & lower essix and lower bonded
My Story / Before & After photos
Estimated treatment time: 18-24 months
Braces Removed: August 2013 (after 33 months in braces)
Retainers: Upper & lower essix and lower bonded
My Story / Before & After photos
Here is some light reading from my first book
Reports of root resorption date back almost 150 years. Bates in 1856 was the first to discuss root resorption of permanent teeth. Apical root resorption is a common finding with or without orthodontic treatment. In fact, Harris reported that resorption was present in about 10% of teeth that had not been orthodontically treated and that 1-2% demonstrated severe resorption, mostly in the upper incisors. It has been suggested that root resorption has always existed as a normal repair phenomenon. Unfortunately there is no way to predict which patients are at risk for root resorption. Resorption has many etiologic factors. Many of these are beyond our control. These factors include: individual predisposition, hormonal, genetic, immunologic and nutritional factors, and previous reimplantation or trauma to the teeth. Brezniak and Wasserstein performed an extensive review of the literature in 1993. They considered several biologic, mechanical, and clinical factors and concluded that no clear cause for the severe root resorption that sometimes occurs after orthodontic treatment could be found. In fact many studies of large sample size have not identified conclusive causative factors of root resorption.
It is thought that most patients undergoing orthodontic treatment will have some degree of root resorption. Fortunately, resorption very rarely occurs to such a degree to cause a problem. In fact, spontaneous loss of a tooth from root shortening has not been reported in the literature. Let’s examine this further. Kalkwarf et al analyzed the amount of periodontal attachment loss from root resorption. They showed that 4mm of root loss from root resorption resulted in approximately 20% attachment loss. Many other studies classify 4mm, or up to ¼ of a tooth’s root length as severe. However this is not severe in terms of tooth longevity. Investigators have stressed that root resorption is less critical than crestal bone loss in terms of periodontal support. 3.0mm of apical root loss is equivalent to 1.0mm of crestal bone loss.
Now that we have established that root resorption is common and difficult to predict, let’s talk about ways we can potentially decrease it. The teeth that are most prone to root resorption are the upper central and lateral incisors followed by lower incisors and lower first molars. This can be due to the greater distances these teeth travel in typical orthodontic treatment. It is also believed that the root form of the incisors lend themselves to root resorption. There is a strong correlation between root form and root resorption. Pointed, bent, or pipette shaped roots are more likely to resorb than normally shaped roots. Proper radiographic assessment of potential high risk teeth should be undertaken in each and every case.
There has been considerable debate about force levels effect on root resorption. Owman-Moll et al found that there was no difference in root resorption severity when the force was doubled from 50cN to 100cN. Whereas, Porter and Harris reported that when high levels of force are used, or applied in an undesirable direction, i.e. jiggling forces, this can give rise to root resorption. There is much more agreement that treatment duration is a bigger factor in root resorption. Sharpe et al found that patients who had undergone longer periods of treatment had greater prevalence of root resorption. Put simply, longer treatment times are associated with more root shortening than shorter treatment times. In fact Levander et al recommend a 2 to 3 month pause in treatment after the initial 6 months of active treatment in order to reduce the amount of root resorption. Some additional factors that have been suggested to increase root resorption include the use of class II elastics. Linge and Linge found wearing class II elastics is associated with a higher risk of root resorption. Also teeth with periodontal disease showed higher risk than teeth without attachment loss. According to Kaley and Phillips, patients with a class I occlusion and acceptable overjet were less likely to have root resorption, most likely due to the smaller amount of tooth movement necessary to achieve the desired final result. On the Class II and III patients are more likely to have root resorption due to the larger distances the teeth have to travel. Open bite cases also carry a higher risk of root resorption. Additionally, there is a higher rate of root resorption in bicuspid extraction cases with the greater movement of the roots through the bone as the cause. Horiuch et al reported that an additional risk factor can be the amount of lingual root torque and the approximation of the maxillary incisor root apices against the cortical plate. This is thought to increase the chance of root resorption by up to 20 times.
The good news is once orthodontic treatment has stopped, root resorption stops. In most patients root resorption is minor and not clinically significant. If there happens to be more extensive root resorption the chance of tooth loss is minimal.
HarrisEF, Boggan BW, Wheeler DA. Apical root resorption in patients treated with comprehensive orthodontics. J Tenn Dent Assoc 2001;81(1);30-3.
Harris EF, Butler M. Pattens of incisor root resorption before and after orthodontic correction in cases with anterior open bites. Am J Orthod Dentofacial Orthop 1992;101:112-19.
HarrisEF, Robinson QC, Woods MA. An analysis of causes of apical root resorption in patients not treated orthodontically. Quintes Int 1993;61:125-32.
Harris E, Kineret S, Tolley E. A heretible componenent for external apical resorption in patients treated orthodontically. Am J Orthod 1997;111:301-9.
Brezniak N, Wasserstein A. Root resorption after orthodontic therapy: Part 1. Literature review. Am J Orthod Dentofacial Orthop 1993;103:62-66.
Brezniak N, Wasserstein A. Root resorption after orthodontic therapy: Part 2. Literature review. Am J Orthod Dentofacial Orthop 1993;103:138-146.
Kalkwarf KL, Krejci RF, Pao YC. Effects of apical root resorption on periodontal support. J Prosthet Dent 1986;56:317-19.
Linge L, Linge B. Patient characteristics and treatment variables associated with apical root resorption during orthodontic treatment. Am J Dentofacial Orthop 1991;99:35-43.
Linge L, Linge B. Apical root resorption in upper anterior teeth. Eur J Orthod 1983;5:173-83.
Owann-Moll P, Kurol J, Lundgren D. The effects of a four-fold increase in orthodontic force magnitude on tooth movement and root resorptions. Eur J Orthod 1996;18:287-94.
Sharpe W, Reed B, Subteiny D, Polson A. Orthodontic relapse, Apical root resorption , and crestal alveolar bone levels. Am J Orthod Dentofacial Orthop 1987;91:252-8.
Levander E, Malmgren O, Eliasson S. Evaluation of root resorption in relation to two orthodontic treatment regimes. A clinical experimental study. Eur J Orthod 1994;16:223-28.
Kaley J, Phillips C, Factors related to root resorption in edgewise practice. Angle Orthod 1991;61:125-131.
Reports of root resorption date back almost 150 years. Bates in 1856 was the first to discuss root resorption of permanent teeth. Apical root resorption is a common finding with or without orthodontic treatment. In fact, Harris reported that resorption was present in about 10% of teeth that had not been orthodontically treated and that 1-2% demonstrated severe resorption, mostly in the upper incisors. It has been suggested that root resorption has always existed as a normal repair phenomenon. Unfortunately there is no way to predict which patients are at risk for root resorption. Resorption has many etiologic factors. Many of these are beyond our control. These factors include: individual predisposition, hormonal, genetic, immunologic and nutritional factors, and previous reimplantation or trauma to the teeth. Brezniak and Wasserstein performed an extensive review of the literature in 1993. They considered several biologic, mechanical, and clinical factors and concluded that no clear cause for the severe root resorption that sometimes occurs after orthodontic treatment could be found. In fact many studies of large sample size have not identified conclusive causative factors of root resorption.
It is thought that most patients undergoing orthodontic treatment will have some degree of root resorption. Fortunately, resorption very rarely occurs to such a degree to cause a problem. In fact, spontaneous loss of a tooth from root shortening has not been reported in the literature. Let’s examine this further. Kalkwarf et al analyzed the amount of periodontal attachment loss from root resorption. They showed that 4mm of root loss from root resorption resulted in approximately 20% attachment loss. Many other studies classify 4mm, or up to ¼ of a tooth’s root length as severe. However this is not severe in terms of tooth longevity. Investigators have stressed that root resorption is less critical than crestal bone loss in terms of periodontal support. 3.0mm of apical root loss is equivalent to 1.0mm of crestal bone loss.
Now that we have established that root resorption is common and difficult to predict, let’s talk about ways we can potentially decrease it. The teeth that are most prone to root resorption are the upper central and lateral incisors followed by lower incisors and lower first molars. This can be due to the greater distances these teeth travel in typical orthodontic treatment. It is also believed that the root form of the incisors lend themselves to root resorption. There is a strong correlation between root form and root resorption. Pointed, bent, or pipette shaped roots are more likely to resorb than normally shaped roots. Proper radiographic assessment of potential high risk teeth should be undertaken in each and every case.
There has been considerable debate about force levels effect on root resorption. Owman-Moll et al found that there was no difference in root resorption severity when the force was doubled from 50cN to 100cN. Whereas, Porter and Harris reported that when high levels of force are used, or applied in an undesirable direction, i.e. jiggling forces, this can give rise to root resorption. There is much more agreement that treatment duration is a bigger factor in root resorption. Sharpe et al found that patients who had undergone longer periods of treatment had greater prevalence of root resorption. Put simply, longer treatment times are associated with more root shortening than shorter treatment times. In fact Levander et al recommend a 2 to 3 month pause in treatment after the initial 6 months of active treatment in order to reduce the amount of root resorption. Some additional factors that have been suggested to increase root resorption include the use of class II elastics. Linge and Linge found wearing class II elastics is associated with a higher risk of root resorption. Also teeth with periodontal disease showed higher risk than teeth without attachment loss. According to Kaley and Phillips, patients with a class I occlusion and acceptable overjet were less likely to have root resorption, most likely due to the smaller amount of tooth movement necessary to achieve the desired final result. On the Class II and III patients are more likely to have root resorption due to the larger distances the teeth have to travel. Open bite cases also carry a higher risk of root resorption. Additionally, there is a higher rate of root resorption in bicuspid extraction cases with the greater movement of the roots through the bone as the cause. Horiuch et al reported that an additional risk factor can be the amount of lingual root torque and the approximation of the maxillary incisor root apices against the cortical plate. This is thought to increase the chance of root resorption by up to 20 times.
The good news is once orthodontic treatment has stopped, root resorption stops. In most patients root resorption is minor and not clinically significant. If there happens to be more extensive root resorption the chance of tooth loss is minimal.
HarrisEF, Boggan BW, Wheeler DA. Apical root resorption in patients treated with comprehensive orthodontics. J Tenn Dent Assoc 2001;81(1);30-3.
Harris EF, Butler M. Pattens of incisor root resorption before and after orthodontic correction in cases with anterior open bites. Am J Orthod Dentofacial Orthop 1992;101:112-19.
HarrisEF, Robinson QC, Woods MA. An analysis of causes of apical root resorption in patients not treated orthodontically. Quintes Int 1993;61:125-32.
Harris E, Kineret S, Tolley E. A heretible componenent for external apical resorption in patients treated orthodontically. Am J Orthod 1997;111:301-9.
Brezniak N, Wasserstein A. Root resorption after orthodontic therapy: Part 1. Literature review. Am J Orthod Dentofacial Orthop 1993;103:62-66.
Brezniak N, Wasserstein A. Root resorption after orthodontic therapy: Part 2. Literature review. Am J Orthod Dentofacial Orthop 1993;103:138-146.
Kalkwarf KL, Krejci RF, Pao YC. Effects of apical root resorption on periodontal support. J Prosthet Dent 1986;56:317-19.
Linge L, Linge B. Patient characteristics and treatment variables associated with apical root resorption during orthodontic treatment. Am J Dentofacial Orthop 1991;99:35-43.
Linge L, Linge B. Apical root resorption in upper anterior teeth. Eur J Orthod 1983;5:173-83.
Owann-Moll P, Kurol J, Lundgren D. The effects of a four-fold increase in orthodontic force magnitude on tooth movement and root resorptions. Eur J Orthod 1996;18:287-94.
Sharpe W, Reed B, Subteiny D, Polson A. Orthodontic relapse, Apical root resorption , and crestal alveolar bone levels. Am J Orthod Dentofacial Orthop 1987;91:252-8.
Levander E, Malmgren O, Eliasson S. Evaluation of root resorption in relation to two orthodontic treatment regimes. A clinical experimental study. Eur J Orthod 1994;16:223-28.
Kaley J, Phillips C, Factors related to root resorption in edgewise practice. Angle Orthod 1991;61:125-131.
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The Powerprox Six Month Braces(R) Technique
http://sixmonthbraces.com/
Powerprox Six Month Braces(R)on ABC News
The Powerprox Six Month Braces(R) Technique
http://sixmonthbraces.com/
Powerprox Six Month Braces(R)on ABC News