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Volume 22
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10.3390/ijms22157860
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Article

Collagen Fibres Orientation in the Bone Matrix around Dental Implants: Does the Implant’s Thread Design Play a Role?

by
Francesco Valente
1,2,
Antonio Scarano
1,
Giovanna Murmura
1,2,
Giuseppe Varvara
1,
Bruna Sinjari
1,2,
Federico Mandelli
3,
Maurizio Piattelli
1,
Sergio Caputi
1,2 and
Tonino Traini
1,2,*
1
Department of Innovative Technologies in Medicine & Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy
2
Electron Microscopy Laboratory, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy
3
Oral Surgery Specialist, Private Practice, 20145 Milan, Italy
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2021, 22(15), 7860; https://doi.org/10.3390/ijms22157860
Submission received: 14 June 2021 / Revised: 21 July 2021 / Accepted: 22 July 2021 / Published: 23 July 2021
(This article belongs to the Section Biochemistry)
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Abstract

The aim of this study was to analyse the influence of different thread shapes of titanium dental implant on the bone collagen fibre orientation (BCFO) around loaded implants. Twenty titanium dental implants, divided for thread shapes in six groups (A–F) were analysed in the present study. All implants were immediately loaded and left in function for 6 months before retrieval. The parameters evaluated under scanning electron microscope were the thread width, thread depth, top radius of curvature, flank angle, and the inter-thread straight section. Two undecalcified histological sections were prepared from each implant. Birefringence analysis using circularly polarized light microscopy was used to quantitively measure BCFO. For groups A–F, respectively, transverse BCFO was 32.7%, 24.1%, 22.3%, 18.2%, 32.4%, and 21.2%, longitudinal BCFO was 28.2%, 14.5%, 44.9%, 33.1%, 37.7%, and 40.2%. The percentage differences between transverse and longitudinal orientation were 4.50% (A), 9.60% (B), −22.60% (C), −14.90% (D), −5.30% (E), and −19.00% (F). Following loading, the amount of transverse and longitudinal BCFO were significantly influenced by the thread shape. The greater flank angles and narrower inter-thread sections of the “V” shaped and “concave” shaped implant threads of groups A and B, respectively, promoted the predominance of transverse BCFO, compared to groups C-F (p < 0.05). A narrow inter-thread straight section promotes transverse BCFO, as do “V” shaped and “concave” shaped threads, which can thus be considered desirable design for implant threads.
Keywords: dental implant; thread shape; collagen fibres orientation; immediate loading; birefringence analysis; circularly polarized light dental implant; thread shape; collagen fibres orientation; immediate loading; birefringence analysis; circularly polarized light

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MDPI and ACS Style

Valente, F.; Scarano, A.; Murmura, G.; Varvara, G.; Sinjari, B.; Mandelli, F.; Piattelli, M.; Caputi, S.; Traini, T. Collagen Fibres Orientation in the Bone Matrix around Dental Implants: Does the Implant’s Thread Design Play a Role? Int. J. Mol. Sci. 2021, 22, 7860. https://doi.org/10.3390/ijms22157860

AMA Style

Valente F, Scarano A, Murmura G, Varvara G, Sinjari B, Mandelli F, Piattelli M, Caputi S, Traini T. Collagen Fibres Orientation in the Bone Matrix around Dental Implants: Does the Implant’s Thread Design Play a Role? International Journal of Molecular Sciences. 2021; 22(15):7860. https://doi.org/10.3390/ijms22157860

Chicago/Turabian Style

Valente, Francesco, Antonio Scarano, Giovanna Murmura, Giuseppe Varvara, Bruna Sinjari, Federico Mandelli, Maurizio Piattelli, Sergio Caputi, and Tonino Traini. 2021. "Collagen Fibres Orientation in the Bone Matrix around Dental Implants: Does the Implant’s Thread Design Play a Role?" International Journal of Molecular Sciences 22, no. 15: 7860. https://doi.org/10.3390/ijms22157860

APA Style

Valente, F., Scarano, A., Murmura, G., Varvara, G., Sinjari, B., Mandelli, F., Piattelli, M., Caputi, S., & Traini, T. (2021). Collagen Fibres Orientation in the Bone Matrix around Dental Implants: Does the Implant’s Thread Design Play a Role? International Journal of Molecular Sciences, 22(15), 7860. https://doi.org/10.3390/ijms22157860

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