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10.3390/ma18143403
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Article

Assessment of Diameter Stability in Morse Taper Dental Implants with Different Angulations After Abutment Connection

by
Bruno Q. S. Cordeiro
1,
Waldimir R. Carvalho
2,
Edgard M. Fonseca
2,
Aldir N. Machado
3,
Bruna Ghiraldini
4,
Michel A. D. Soares
4 and
Priscila L. Casado
5,*
1
Post-Graduation in Dentistry Program, School of Dentistry, Fluminense Federal University (UFF), Niterói 24020140, RJ, Brazil
2
Prostheses Department, School of Dentistry, Fluminense Federal University (UFF), Niterói 24020140, RJ, Brazil
3
Clinical Center of Research in Implant Dentistry, School of Dentistry, Fluminense Federal University (UFF), Niterói 24020140, RJ, Brazil
4
Paulista University (UNIP), São Paulo 03166001, SP, Brazil
5
Post-Graduation in Implant Dentistry Program, School of Dentistry, Fluminense Federal University (UFF), Niterói 24020140, RJ, Brazil
*
Author to whom correspondence should be addressed.
Materials 2025, 18(14), 3403; https://doi.org/10.3390/ma18143403
Submission received: 17 April 2025 / Revised: 18 May 2025 / Accepted: 23 May 2025 / Published: 21 July 2025
(This article belongs to the Section Biomaterials)
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Abstract

Background: Modification of diameter stability after the abutment retention can result in a decrease in the applied torque or affect the peri-implant tissue, compromising the longevity of the treatment. Therefore, this study aimed to investigate how different connection angles (11.5° and 16.0°) at the implant–abutment interface influence implant diameter stability under the manufacturer’s recommended torque. Methods: Eighty Morse cone-type implant specimens were divided into two groups, with different internal conicity angles: 11.5° (n = 40) and 16.0° (n = 40). Implants varied in diameter (mm): 3.5, 3.8, 4.5, and 5.0. Initial measurements of the implants’ external diameter were carried out. After these measurements, all implants received the abutment installation, and a final measurement of the external implant diameter was performed. Results: Considering the comparative analysis between the final and initial diameters, a non-significant increase in diameter, in the cervical implant region, after torque on the abutment, was observed. The torque applied to the abutments did not produce deformations in the cervical area of Morse taper implants. Conclusions: The torque applied to the abutment screw in implants with a Morse taper connection does not cause deformation in the cervical area of the implant body in implant with 11.5° and 16.0° conicity angles.
Keywords: dental implants; Morse connection; prosthetic torque; plastic deformation dental implants; Morse connection; prosthetic torque; plastic deformation

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MDPI and ACS Style

Cordeiro, B.Q.S.; Carvalho, W.R.; Fonseca, E.M.; Machado, A.N.; Ghiraldini, B.; Soares, M.A.D.; Casado, P.L. Assessment of Diameter Stability in Morse Taper Dental Implants with Different Angulations After Abutment Connection. Materials 2025, 18, 3403. https://doi.org/10.3390/ma18143403

AMA Style

Cordeiro BQS, Carvalho WR, Fonseca EM, Machado AN, Ghiraldini B, Soares MAD, Casado PL. Assessment of Diameter Stability in Morse Taper Dental Implants with Different Angulations After Abutment Connection. Materials. 2025; 18(14):3403. https://doi.org/10.3390/ma18143403

Chicago/Turabian Style

Cordeiro, Bruno Q. S., Waldimir R. Carvalho, Edgard M. Fonseca, Aldir N. Machado, Bruna Ghiraldini, Michel A. D. Soares, and Priscila L. Casado. 2025. "Assessment of Diameter Stability in Morse Taper Dental Implants with Different Angulations After Abutment Connection" Materials 18, no. 14: 3403. https://doi.org/10.3390/ma18143403

APA Style

Cordeiro, B. Q. S., Carvalho, W. R., Fonseca, E. M., Machado, A. N., Ghiraldini, B., Soares, M. A. D., & Casado, P. L. (2025). Assessment of Diameter Stability in Morse Taper Dental Implants with Different Angulations After Abutment Connection. Materials, 18(14), 3403. https://doi.org/10.3390/ma18143403

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