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"Evaluation of 4 and 8 weeks of healing in a murine implant model".
Journal of Oral Implantology 2024 April 28
Dental implants are increasing in prevalence as desirable options for replacing missing teeth. Unfortunately, implants come with complications, and animal models are crucial to studying the pathophysiology of complications. Current murine model experiments can be lengthy, with eight weeks of extraction socket healing before implant placement. Therefore, we aimed to investigate the efficacy of decreasing extraction healing time from eight to four weeks in a dental implant mouse model. Thirty-one three-week-old C57BL/6J male mice underwent maxillary first and second molar extractions followed by eight (control) or four (test) weeks of extraction socket healing before implant placement. Mice were euthanized after four weeks of implant osseointegration. Samples were analyzed via microcomputed tomography and histology. When mice received implants four weeks following extractions, there was no statistical difference in initial bone crest remodeling or surrounding bone volume compared to those after eight weeks of healing. Histologically, the hard and soft tissues surrounding both groups of implants displayed similar alveolar bone levels, inflammatory infiltrate, osteoclast count, and collagen organization. A four-week extraction healing period can be utilized without concern for osseointegration in a murine implant model and is a viable experimental alternative to the previous eight weeks of healing. While small animal implant models are less directly applicable to humans, advancements in experimental methods will ultimately benefit patients receiving dental implants through improved prevention and treatment of complications. Subsequent research could investigate occlusal effects or whether healing time affects prognosis following induction of peri-implantitis.
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