NDLI: Results of thermal osteonecrosis for implant removal on electron microscopy, implant stability, and radiographic parameters

Content Provider	Springer Nature : BioMed Central
Author	Kniha, Kristian Buhl, Eva Miriam Al-Sibai, Faruk Möhlhenrich, Stephan Christian Bock, Anna Heitzer, Marius Hölzle, Frank Modabber, Ali
Abstract	Background This rat study aimed to evaluate the feasibility of temperature thresholds that affect peri-implant bone cells and morphology and the potential usefulness of thermal necrosis for inducing implant removal for a subsequent in vivo pig study. Methods On one side, rat tibiae were thermally treated before implant insertion. The contralateral side was used as the control group without tempering. Temperatures of 4 °C, 3 °C, 2 °C, 48 °C, 49 °C, and 50 °C were evaluated with a tempering time of 1 min. Energy-dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM) analyses were performed. Results The EDX analysis revealed significant increases in element weights at 50 °C (e.g., calcium, phosphate, sodium, and sulfur; p < 0.01). The results of the TEM analysis showed that at all the applied cold and warm temperatures, signs of cell damage were observed, including vacuolization, shrinkage, and detachment from the surrounding bone matrix. Some cells became necrotic, leaving the lacunae empty. Conclusions Temperature of 50 °C led to irreversible cell death. The degree of damage was more significant at 50 °C and 2 °C than at 48 °C and 5 °C. Although this was a preliminary study, from the results, we identified that a temperature of 50 °C at a time interval of 60 min can lower the number of samples in a further study of thermo-explantation. Thus, the subsequent planned in vivo study in pigs, which will consider osseointegrated implants, is feasible.
Related Links	https://head-face-med.biomedcentral.com/counter/pdf/10.1186/s13005-023-00349-2.pdf
Ending Page	7
Page Count	7
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s13005-023-00349-2
Journal	Head & Face Medicine
Issue Number	1
Volume Number	19
Language	English
Publisher	BioMed Central
Publisher Date	2023-03-07
Access Restriction	Open
Subject Keyword	Otorhinolaryngology Oral and Maxillofacial Surgery Dentistry Head and Neck Surgery Osteocyte lacuna Osteonecrosis Temperature Histopathology
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Neurology (clinical) Dentistry
Journal Impact Factor	2.4/2023
5-Year Journal Impact Factor	2.9/2023

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