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Mamani-Valeriano HL, Silva NP, Nímia HH, Pereira-Silva M, Oliveira MEDFS, Rodrigues LGDS, Tavares PMH, Hadad H, de Jesus LK, Santos AFP, Barbosa DDB, Poli PP, Maiorana C, de Carvalho PSP, Okamoto R, Souza FÁ. Bone Incorporation of a Poly (L-Lactide-Co-D, L-Lactide) Internal Fixation Device in a Rat's Tibia: Microtomographic, Confocal LASER, and Histomorphometric Analysis. BIOLOGY 2024; 13:471. [PMID: 39056666 PMCID: PMC11273520 DOI: 10.3390/biology13070471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/14/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024]
Abstract
This study evaluated the bone incorporation process of a screw-shaped internal fixation device made of poly (L-lactide-co-D, L-lactide) (PLDLLA). Thirty-two male Wistar rats received 32 fixation devices (2 mm × 6 mm) randomly assigned to either the right or left tibia and one implant in each animal. After 7, 14, 28, and 42 days, the rats were euthanized and the specimens were subjected to microtomographic computed tomography (microCT) and histomorphometric analyses to evaluate bone interface contact (BIC%) and new bone formation (NBF%) in cortical and cancellous bone areas. The animals euthanized on days 28 and 42 were treated with calcein and alizarin red, and confocal LASER microscopy was performed to determine the mineral apposition rate (MAR). Micro-CT revealed a higher percentage of bone volume (p < 0.006), trabecular separation (p < 0.001), and BIC in the cortical (p < 0.001) and cancellous (p = 0.003) areas at 28 and 42 days than at 7 and 14 days. The cortical NBF at 42 days was greater than that at 7 and 14 days (p = 0.022). No statistically significant differences were observed in cancellous NBF or MAR at 28 and 42 days. Based on these results, it can be seen that the PLDLLA internal fixation device is biocompatible and allows new bone formation around the screw thread.
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Affiliation(s)
- Harrisson Lucho Mamani-Valeriano
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Nelson Padilha Silva
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Heloisa Helena Nímia
- Department of Dental Materials and Prothesis, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.H.N.); (D.d.B.B.)
| | - Maísa Pereira-Silva
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Maria Eduarda de Freitas Santana Oliveira
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Letícia Gabriella de Souza Rodrigues
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Paulo Matheus Honda Tavares
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Henrique Hadad
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Laís Kawamata de Jesus
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Ana Flávia Piquera Santos
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Débora de Barros Barbosa
- Department of Dental Materials and Prothesis, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.H.N.); (D.d.B.B.)
| | - Pier Paolo Poli
- Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (P.P.P.); (C.M.)
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy
| | - Carlo Maiorana
- Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (P.P.P.); (C.M.)
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy
| | - Paulo Sergio Perri de Carvalho
- Implant Dentistry Postgraduate Program, São Leopoldo Mandic School of Dentistry and Research Center, Campinas 13045-755, SP, Brazil;
| | - Roberta Okamoto
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-253, SP, Brazil;
| | - Francisley Ávila Souza
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
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