Evaluation of the screw tent-pole technique for the repair of anterior maxilla width defects: a prospective, randomized, split-mouth study.

Autor: Guillen GA; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil. Electronic address: guillen.spee@gmail.com., Araújo ALD; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil., Macêdo FGC; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil., Groppo FC; Physiological Sciences Department, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil., Vargas PA; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil., Nóia CF; Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: International journal of oral and maxillofacial surgery [Int J Oral Maxillofac Surg] 2021 Jun; Vol. 50 (6), pp. 801-807. Date of Electronic Publication: 2020 Dec 04.
DOI: 10.1016/j.ijom.2020.10.008
Abstrakt: The aim of this prospective study was to compare horizontal bone augmentation in the anterior maxilla associated with two types of tenting screw used in the screw tent-pole technique. Ten patients with a premaxilla width deficiency underwent grafting with protein-free xenograft bone. A split-mouth design was used, with sides allocated randomly to receive standard and wide-head tenting screws. Implants were installed after 9 months. Patients underwent clinical, cone beam computed tomography (CBCT), and histomorphometric evaluations. The buccal aspect of the ridge was classified as flat or concave in shape. Clinical measurements showed width augmentation of 1.05mm, 2.45mm, and 2.70mm for standard screws and 1.50mm, 3.10mm, and 3.45mm for wide-head screws, at the ridge, 5mm, and 10mm, respectively. CBCT showed width augmentation of 0.74mm, 3.88mm, and 4.72mm for standard screws and 0.91mm, 4.05mm, and 4.37mm for wide-head screws, at the crest, 5mm, and 10mm, respectively. Histomorphometric analysis showed 30.99% ± 26.43% vital bone tissue, 11.32% ± 9.68% graft residue, and 57.66% ± 21.85% connective tissue for standard screws and 32.64% ± 20.28%, 9.73% ± 5.82%, and 57.61% ± 20.15%, respectively, for wide-head screws. Flat alveolar ridges showed the lowest percentage of vital bone. New bone formation seems to be optimized on concave ridges. There was no statistically significant difference in bone gain results between standard and wide-head tenting screws.
(Copyright © 2020 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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