Effects of polymethyl methacrylate-based bone cement graft for treating excessive gingival display and its dimensional facial changes: 12-Month clinical study

to present a 12-month follow-up with photographic and tomographic analyses of the effect of polymethyl methacrylate-based bone cement graft (PMMA) in gingival exposure (GE) in patients with excessive gingival display (EGD). Twelve patients with EGD were included. The PMMA was surgically placed. A fr...

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Published in:	Journal of oral biology and craniofacial research (Amsterdam) Vol. 14; no. 3; pp. 326 - 334
Main Authors:	Martins de Araújo Carneiro, Valéria, Roquete, Mayra Pereira, Seabra Gomes, Andressa Meireles, Marinho, Mônica Umpierre, Simino de Melo, Gabriel, Kasabji, Feras, An, Tien-Li, Nascimento de Sousa, Dircilei, Meireles Rodrigues, João Marcelo, Stefani, Cristine Miron, Guimarães, Maria do Carmo Machado, Rodrigues Ribeiro, Ana Clara, Soares Andrade, Carlos Alexandre
Format:	Journal Article
Language:	English
Published:	Netherlands Elsevier B.V 01-05-2024 Elsevier
Subjects:	Crown lengthening Gingiva Lip Mouth mucosa Polymethyl methacrylate Smiling Crown lengthening Lip Smiling Gingiva Polymethyl methacrylate Mouth mucosa
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Summary:	to present a 12-month follow-up with photographic and tomographic analyses of the effect of polymethyl methacrylate-based bone cement graft (PMMA) in gingival exposure (GE) in patients with excessive gingival display (EGD). Twelve patients with EGD were included. The PMMA was surgically placed. A frontal and lateral photograph protocol was performed at baseline (T0), 3 (T3), 6 (T6), and 12 months (T12) post-operatively. Soft tissue cone-beam computed tomography (ST-CBCT) was performed at T0 and T12. Measures included GE, length of the lip vermilion (LLV), lip shape (LS), nose width (NW), filter width (FW), nasolabial angle (NAS) while smiling, and nasolabial angle at rest (NAR). The height, thickness, and volume of the cement graft were also measured in the ST-CBCT. The comparisons were performed by Kruskal-Wallis test at 5 % of significance (p < 0.05). The height, thickness, and volume of the PMMA were respectively 12.84 ± 1.59 mm, 3.83 ± 0.53, and 1532.02 ± 532.52 mm3. PMMA significantly decreased GE from 8.33 ± 1.25 mm (T0) to 6.60 ± 0.93 mm (T12) (p < 0.01). NAR was 98.34 ± 9.28° at T0 and increased to 105.13 ± 7.33° at T12; however, the angle value was not statistically different (p = 0.08). LLV, LS, NW, FW, and NAS did not exhibit statistical differences between the baseline and follow-up periods. PMMA significantly decreased GE in a 12-month follow-up without influencing adjacent soft tissue anatomical structures.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2212-4268 2212-4276
DOI:	10.1016/j.jobcr.2024.04.007