{"id":28689,"date":"2023-10-30T10:20:27","date_gmt":"2023-10-30T10:20:27","guid":{"rendered":"https:\/\/www.sylvainchamberland.com\/?p=28689"},"modified":"2023-10-30T10:20:39","modified_gmt":"2023-10-30T10:20:39","slug":"root-spring-and-lingual-arch","status":"publish","type":"post","link":"https:\/\/www.sylvainchamberland.com\/en\/root-spring-and-lingual-arch\/","title":{"rendered":"Root Spring and Lingual Arch"},"content":{"rendered":"\n

On October 8, I published photos 1 and 2 of this case of a 36-year-old woman with a host of orthodontic problems that are not all that easy to manage. At the outset, I mention that periodontal treatment was carried out prior to orthodontic treatment.
The purpose of this publication is to show the biomechanics I used to straighten the lower right molar (#47) and intrude the upper right molar (#16).
For tooth #47, I combined the use of a fixed-removable lingual arch with specific preactivation folds to generate two equal and opposite moments (slide #6). Slide 4 shows an inadequate force system (geometry IV) for straightening molar #47, as it causes molar extrusion and premolar intrusion, which is counterproductive.
I also used the lingual arch to correct the mesial rotation of #47 (slide #8).
Slide 5 shows the system of forces generated by a root spring. The aim is to have two equal and opposite moments, with no vertical forces acting on the anterior and posterior segments, as in VI geometry.
Slide #6 describes how I configured and pre-activated the spring in .019 X .025 TMA.
Slide #9 shows the evolution of the root spring over 15 weeks.
Slide #10 shows the straightening obtained by comparing the initial radiograph with the one at 31 weeks. The 2 small arrows indicate the tooth’s root movement.<\/p>\n\n\n\n

Slide #11 shows the progression of intrusion and distalization of tooth #16 with an anchoring minivis (Tomas pin EP 10 mm). A .032 x .032 TMA transpalatal arch is required to maintain arch width.<\/p>\n\n\n\n

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On October 8, I published photos 1 and 2 of this case of a 36-year-old woman with a host of orthodontic problems that are not all that easy to manage. At the outset, I mention that periodontal treatment was carried out prior to orthodontic treatment.The purpose of this publication is to show the biomechanics I […]<\/p>\n","protected":false},"author":1,"featured_media":28666,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[751],"tags":[],"class_list":["post-28689","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-facebook-albums"],"acf":[],"yoast_head":"\nRoot Spring and Lingual Arch - Dr. Sylvain Chamberland, Orthodontist<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sylvainchamberland.com\/en\/root-spring-and-lingual-arch\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Root Spring and Lingual Arch - Dr. Sylvain Chamberland, Orthodontist\" \/>\n<meta property=\"og:description\" content=\"On October 8, I published photos 1 and 2 of this case of a 36-year-old woman with a host of orthodontic problems that are not all that easy to manage. 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