2026-06-29T07:50:45Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1036362025-09-01T17:47:41Zcom_20.500.14352_14col_20.500.14352_15

In vitro analysis of the removability of fractured prosthetic screws within endosseous implants using conventional and mechanical techniques Senent Vicente, Gisela Baixauli López, Mar González Angulo, Eva Fernández Bravo, Luisa Zubizarreta Macho, Álvaro Gómez Polo, Miguel Ángel Selva Otaolaurruchi, Eduardo J. Agustín Panadero, Rubén 616.314-089.843 616.314-089.28 Abutment Fractured abutment screws Dental implants Internal connection implant Retrieval Fatigue Performance Resistance Strength Implantes dentales Aparatos y material odontológicos 3299 Otras Especialidades Médicas 3314 Tecnología Médica 2023 Descuentos MDPI Statement of problem: The extraction of fractured abutment screws can be a difficult challenge to overcome. Purpose: To compare the removal capacity, dental implant connection damage, and time required to remove the fractured abutment screws between three drilling techniques and a conventional method. Materials and methods: A total of 180 prefabricated screw-retained abutments were intentionally fractured in internal connection dental implants after being subjected to a cyclic load and a static compression load. Afterwards, three operators randomly removed the fractured abutment screws with the following drilling techniques and a conventional method: A: a conventional technique using an exploration probe and ultrasonic appliance (n = 45), Rhein83® (n = 45); B: Sanhigia® (n = 45); C: Phibo® (n = 45). Two-way ANOVA models were estimated to evaluate the mean time according to the method and operator used. Results: The probability of removal of the screws with mobility was twelve times higher than that of the screws without mobility (OR = 12.4; p < 0.001). The success rate according to the operators did not show statistically significant differences (p = 0.371). The location of the fractured screw did not affect removal success (p = 0.530). The internal thread of the implant was affected after the removal process in 9.8% of the cases. The mean extraction time was 3.17 ± 2.52 min. The Rhein83® method showed a success rate of 84.4%, followed by the Phibo® and conventional methods (71.1%) and the Sanhigia® method (46.7%). Conclusions: The Rhein83® drilling technique increases the removal probability of fractured abutment screws. The initial mobility of the fragment is also a significant factor in the removal success. Depto. de Odontología Conservadora y Prótesis Fac. de Odontología TRUE pub Descuento UCM 2024-04-29T13:37:16Z 2024-04-29T13:37:16Z 2023 journal article VoR https://hdl.handle.net/20.500.14352/103636 XXXX-XXXX 10.3390/ma16237317 1996-1944 eng Senent-Vicente G, Baixauli-López M, González-Angulo E, Fernández-Bravo L, Zubizarreta-Macho Á, Gómez-Polo M, Selva-Otaolaurruchi EJ, Agustín-Panadero R. In Vitro Analysis of the Removability of Fractured Prosthetic Screws within Endosseous Implants Using Conventional and Mechanical Techniques. Materials (Basel). 2023 Nov 24;16(23):7317 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ open access application/pdf MDPI