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Search Results (2)

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Keywords = waferless maxillary surgery

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12 pages, 2902 KiB  
Article
Waferless Orthognathic Surgery with Customized Osteosynthesis and Surgical Guides: A Prospective Study
by Marc Espino-Segura-Illa, Octavi Camps-Font, Ada Ferrer-Fuertes, Fran Cuesta-González, Ignacio Zubillaga-Rodríguez and Ramón Sieira-Gil
Appl. Sci. 2024, 14(5), 1893; https://doi.org/10.3390/app14051893 - 25 Feb 2024
Cited by 3 | Viewed by 2422
Abstract
The purpose of this paper was to describe and to evaluate the accuracy of a protocol that involves CAD/CAM-generated cutting guides and customized titanium plates for waferless orthognathic surgery. Twenty-one patients consecutively treated between January 2021 and January 2023 were included. The preoperative [...] Read more.
The purpose of this paper was to describe and to evaluate the accuracy of a protocol that involves CAD/CAM-generated cutting guides and customized titanium plates for waferless orthognathic surgery. Twenty-one patients consecutively treated between January 2021 and January 2023 were included. The preoperative virtual surgical plan (VSP) was compared with the final position determined from the postoperative CT scan and STL files. An alignment algorithm was employed to adjust the skull position in areas unaffected by the surgery. Absolute and signed deviations were calculated across all three dimensions for each maxilla, mandible and chin landmark. The accuracy analysis revealed an overall deviation of 0.93 mm (95% confidence interval [95%CI]: 0.86 to 0.99), which was < 2 mm for all assessed landmarks (p < 0.05; one-sample t-test). The mandibular landmarks showed greater deviation than the maxillary ones (p < 0.001; independent-samples t-test). Considering the deviations along the three axes, statistically significant differences were identified (p < 0.001; one-way analysis of variance). The reported protocol provides evidence on the benefit of guided orthognathic surgery when performed using a defined VSP protocol, improving accuracy in the maxilla, mandible and chin position, considered both globally and as isolated variables. Full article
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8 pages, 1453 KiB  
Article
The Predictability of the Surgical Outcomes of Class III Patients in the Transverse Dimension—A Study of Three-Dimensional Assessment
by U-Kei Lai, Cheng-Chun Wu, Yu-Jen Chang, Shiu-Shiung Lin, Jui-Pin Lai and Te-Ju Wu
J. Pers. Med. 2022, 12(7), 1147; https://doi.org/10.3390/jpm12071147 - 15 Jul 2022
Cited by 1 | Viewed by 1603
Abstract
This study aimed to assess the outcomes of planned maxillary surgical movements in the transverse direction in patients possessing a Class III skeletal pattern. The available consecutive patients’ records were retrospectively reviewed. Only those possessing a Class III skeletal pattern, and for whom [...] Read more.
This study aimed to assess the outcomes of planned maxillary surgical movements in the transverse direction in patients possessing a Class III skeletal pattern. The available consecutive patients’ records were retrospectively reviewed. Only those possessing a Class III skeletal pattern, and for whom the same virtual planning system was used, were enrolled. The waferless technique was used to guide the jawbone repositioning. A representative triangle in the virtual maxilla of each stage was used to validate the planned surgical movements (PSMs) and the outcome discrepancy (OD). The linear and angular measurements were retrieved for the assessments of the correlation between PSM and OD. In total, 44 adult patients who met the inclusion criteria were studied. The average linear OD of the A-point in the transverse direction was 0.66 ± 0.54 mm, and the yaw correction showed 1.02 ± 0.84 degrees in difference. There was no specific correlation between the linear PSMs and ODs; however, the angular ones were positively correlated. With the help of the waferless technique to transfer the virtual planning results, the practitioners could confidently predict the postsurgical maxillary position in the transverse direction in the orthognathic surgery of Class III patients. However, the yaw correction should be carefully planned to avoid postsurgical instabilities. Full article
(This article belongs to the Special Issue Prevention and Management of Oral Healthcare)
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