Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets
Background: In modern dental practice, it is critical to maintain surface integrity and achieve optimal aesthetics after orthodontic treatment in high-cost ceramics, such as lithium disilicate, used in restorative materials (e.g., crowns or veneers). This study aimed to evaluate the surface roughnes...
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| Format: | Article |
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International Medical Research and Development Corporation
2025-06-01
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| Series: | International Journal of Biomedicine |
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| Online Access: | http://www.ijbm.org/articles/i58/ijbm_15(2)_oa20.pdf |
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| author | Blerim Mehmeti Granita Muhaxheri Rina Caka Bleron Azizi |
| author_facet | Blerim Mehmeti Granita Muhaxheri Rina Caka Bleron Azizi |
| author_sort | Blerim Mehmeti |
| collection | DOAJ |
| description | Background: In modern dental practice, it is critical to maintain surface integrity and achieve optimal aesthetics after orthodontic treatment in high-cost ceramics, such as lithium disilicate, used in restorative materials (e.g., crowns or veneers). This study aimed to evaluate the surface roughness (Ra) of lithium disilicate ceramic conditioned with hydrofluoric acid (HFA) or phosphoric acid (PPA) before bonding, after the removal of orthodontic brackets, and following surface polishing. Additionally, the Porcelain Fracture Index (PFI) was used to assess the ceramic surface condition after debonding.
Methods and Results: Surface condition and roughness were analyzed on 35 lithium disilicate, all-ceramic semi-crowns, divided into the following groups: control group (no surface conditioning performed), HFA-conditioned group, PPA-conditioned group, HFA post-debonding group (HFA-SBS), PPA post-debonding group (PPA-SBS), HFA polished group (HFA-P), and PPA polished group (PPA-P).
Surface roughness (Ra) was measured using a stylus instrument by taking five roughness profiles on each sample. Subsequently, surface modifications were evaluated using scanning electron microscopy to analyze the ceramic condition after bracket removal. Significant differences in Ra were observed among the groups, indicating non-random variations (P<0.001). The control group differed significantly from all other groups except PPA-P. Significant differences were also observed between the HFA and PPA groups and their respective post-debonding groups (HFA-SBS and PPA-SBS). Furthermore, HFA-P and PPA-P differed significantly from the debonded groups (HFA-SBS and PPA-SBS) that did not undergo polishing.
Conclusion: Phosphoric acid is a safer option for surface conditioning before bracket bonding on lithium disilicate glass ceramic restorations, as it facilitates achieving high aesthetics after polishing. |
| format | Article |
| id | doaj-art-7ee5b57d2d4448c483ba7d0e8df11383 |
| institution | DOAJ |
| issn | 2158-0510 2158-0529 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | International Medical Research and Development Corporation |
| record_format | Article |
| series | International Journal of Biomedicine |
| spelling | doaj-art-7ee5b57d2d4448c483ba7d0e8df113832025-08-20T03:09:46ZengInternational Medical Research and Development CorporationInternational Journal of Biomedicine2158-05102158-05292025-06-0115239139510.21103/Article15(2)_OA20Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic BracketsBlerim Mehmeti0Granita Muhaxheri1Rina Caka2 Bleron Azizi3Faculty of Dentistry, AAB College, Prishtina, KosovoPrivate Dental Clinic, Prishtina, KosovoPrivate Dental Clinic, Prishtina, KosovoFaculty of Dentistry, AAB College, Prishtina, KosovoBackground: In modern dental practice, it is critical to maintain surface integrity and achieve optimal aesthetics after orthodontic treatment in high-cost ceramics, such as lithium disilicate, used in restorative materials (e.g., crowns or veneers). This study aimed to evaluate the surface roughness (Ra) of lithium disilicate ceramic conditioned with hydrofluoric acid (HFA) or phosphoric acid (PPA) before bonding, after the removal of orthodontic brackets, and following surface polishing. Additionally, the Porcelain Fracture Index (PFI) was used to assess the ceramic surface condition after debonding. Methods and Results: Surface condition and roughness were analyzed on 35 lithium disilicate, all-ceramic semi-crowns, divided into the following groups: control group (no surface conditioning performed), HFA-conditioned group, PPA-conditioned group, HFA post-debonding group (HFA-SBS), PPA post-debonding group (PPA-SBS), HFA polished group (HFA-P), and PPA polished group (PPA-P). Surface roughness (Ra) was measured using a stylus instrument by taking five roughness profiles on each sample. Subsequently, surface modifications were evaluated using scanning electron microscopy to analyze the ceramic condition after bracket removal. Significant differences in Ra were observed among the groups, indicating non-random variations (P<0.001). The control group differed significantly from all other groups except PPA-P. Significant differences were also observed between the HFA and PPA groups and their respective post-debonding groups (HFA-SBS and PPA-SBS). Furthermore, HFA-P and PPA-P differed significantly from the debonded groups (HFA-SBS and PPA-SBS) that did not undergo polishing. Conclusion: Phosphoric acid is a safer option for surface conditioning before bracket bonding on lithium disilicate glass ceramic restorations, as it facilitates achieving high aesthetics after polishing.http://www.ijbm.org/articles/i58/ijbm_15(2)_oa20.pdflithium disilicatesurface roughnessorthodontic bracketshydrofluoric acidphosphoric acid |
| spellingShingle | Blerim Mehmeti Granita Muhaxheri Rina Caka Bleron Azizi Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets International Journal of Biomedicine lithium disilicate surface roughness orthodontic brackets hydrofluoric acid phosphoric acid |
| title | Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets |
| title_full | Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets |
| title_fullStr | Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets |
| title_full_unstemmed | Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets |
| title_short | Evaluation of Lithium Disilicate Ceramic Surfaces before Bonding and after Removal of Orthodontic Brackets |
| title_sort | evaluation of lithium disilicate ceramic surfaces before bonding and after removal of orthodontic brackets |
| topic | lithium disilicate surface roughness orthodontic brackets hydrofluoric acid phosphoric acid |
| url | http://www.ijbm.org/articles/i58/ijbm_15(2)_oa20.pdf |
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