A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed Retainer: A Novel Approach with Two-Year Follow-Up
Stainless steel alloys containing 8% to 12% nickel and 17% to 22% chromium are generally used in orthodontic appliances. A major concern has been the performance of alloys in the environment in which they are intended to function in the oral cavity. Biodegradation andmetal release increase the ris...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Hindawi Publishing Corporation
2017
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| Online Access: | http://eprints.usm.my/36687/ http://eprints.usm.my/36687/1/%28A_CAD_CAM_Zirconium_Bar%29_1583403.pdf |
| _version_ | 1848877980968812544 |
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| author | Zreaqat, Maen Hassan, Rozita Hanoun, Abdul Fatah |
| author_facet | Zreaqat, Maen Hassan, Rozita Hanoun, Abdul Fatah |
| author_sort | Zreaqat, Maen |
| building | USM Institutional Repository |
| collection | Online Access |
| description | Stainless steel alloys containing 8% to 12% nickel and 17% to 22% chromium are generally used in orthodontic appliances. A
major concern has been the performance of alloys in the environment in which they are intended to function in the oral cavity.
Biodegradation andmetal release increase the risk of hypersensitivity and cytotoxicity. This case report describes for the first time a
CAD/CAM zirconium bar as a bonded mandibular fixed retainer with 2-year follow-up in a patient who is subjected to long-term
treatment with fixed orthodontic appliance and suspected to have metal hypersensitivity as shown by the considerable increase
of nickel and chromium concentrations in a sample of patient’s unstimulated saliva. The CAD/CAM design included a 1.8mm
thickness bar on the lingual surface of lower teeth from canine to canine with occlusal rests on mesial side of first premolars. For
better retention, a thin layer of feldspathic ceramic was added to the inner surface of the bar and cemented with two dual-cured
cement types. The patient’s complaint subsided 6 weeks after cementation. Clinical evaluation appeared to give good functional
value where the marginal fit of digitized CAD/CAM design and glazed surface offered an enhanced approach of fixed retention. |
| first_indexed | 2025-11-15T17:24:04Z |
| format | Article |
| id | usm-36687 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T17:24:04Z |
| publishDate | 2017 |
| publisher | Hindawi Publishing Corporation |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-366872017-09-20T07:36:22Z http://eprints.usm.my/36687/ A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed Retainer: A Novel Approach with Two-Year Follow-Up Zreaqat, Maen Hassan, Rozita Hanoun, Abdul Fatah RK520-528 Orthodontics Stainless steel alloys containing 8% to 12% nickel and 17% to 22% chromium are generally used in orthodontic appliances. A major concern has been the performance of alloys in the environment in which they are intended to function in the oral cavity. Biodegradation andmetal release increase the risk of hypersensitivity and cytotoxicity. This case report describes for the first time a CAD/CAM zirconium bar as a bonded mandibular fixed retainer with 2-year follow-up in a patient who is subjected to long-term treatment with fixed orthodontic appliance and suspected to have metal hypersensitivity as shown by the considerable increase of nickel and chromium concentrations in a sample of patient’s unstimulated saliva. The CAD/CAM design included a 1.8mm thickness bar on the lingual surface of lower teeth from canine to canine with occlusal rests on mesial side of first premolars. For better retention, a thin layer of feldspathic ceramic was added to the inner surface of the bar and cemented with two dual-cured cement types. The patient’s complaint subsided 6 weeks after cementation. Clinical evaluation appeared to give good functional value where the marginal fit of digitized CAD/CAM design and glazed surface offered an enhanced approach of fixed retention. Hindawi Publishing Corporation 2017 Article PeerReviewed application/pdf en http://eprints.usm.my/36687/1/%28A_CAD_CAM_Zirconium_Bar%29_1583403.pdf Zreaqat, Maen and Hassan, Rozita and Hanoun, Abdul Fatah (2017) A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed Retainer: A Novel Approach with Two-Year Follow-Up. Case Reports in Dentistry, 2017 (158340). pp. 1-4. ISSN 2090-6447 https://doi.org/10.1155/2017/1583403 |
| spellingShingle | RK520-528 Orthodontics Zreaqat, Maen Hassan, Rozita Hanoun, Abdul Fatah A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed Retainer: A Novel Approach with Two-Year Follow-Up |
| title | A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed
Retainer: A Novel Approach with Two-Year Follow-Up |
| title_full | A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed
Retainer: A Novel Approach with Two-Year Follow-Up |
| title_fullStr | A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed
Retainer: A Novel Approach with Two-Year Follow-Up |
| title_full_unstemmed | A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed
Retainer: A Novel Approach with Two-Year Follow-Up |
| title_short | A CAD/CAM Zirconium Bar as a Bonded Mandibular Fixed
Retainer: A Novel Approach with Two-Year Follow-Up |
| title_sort | cad/cam zirconium bar as a bonded mandibular fixed
retainer: a novel approach with two-year follow-up |
| topic | RK520-528 Orthodontics |
| url | http://eprints.usm.my/36687/ http://eprints.usm.my/36687/ http://eprints.usm.my/36687/1/%28A_CAD_CAM_Zirconium_Bar%29_1583403.pdf |