| Objective: The clinical results of the two materials were compared by filling the extraction sockets with medical collagen sponge and Bio-Oss bone powder for alveolar ridge preservation after tooth extraction and observing the healing of the extraction sockets and the changes in the alveolar bone at the extraction sites.Methods: A total of 90 patients with indications for tooth extraction who required extraction of anterior teeth and site-preservation to create implant conditions were selected from August2020 to September 2021 at the Oral and Maxillofacial Surgery Clinic of the Fourth Affiliated Hospital of Inner Mongolia Medical University and randomly divided into experimental group A: medical collagen sponge;experimental group B: Bio-Oss bone powder;control group C: natural healing after tooth extraction.Patients in group A and group B were implanted with the corresponding material for site preservation after extraction,while patients in group C were left untreated after extraction and the extraction sockets healed naturally.The height,width and bone density of the alveolar bone at the extraction site in the three groups were measured using i CATVision software for comparison.Results:(1)The general information of the patients in the three groups was compared,the difference was not statistically significant;(2)The bleeding rate of patients in Group A and Group B was lower than that in Group C 30 minutes after surgery,the difference between the bleeding rate in Group A and Group B was not statistically significant;(3)The wound healing in Group A and Group B was better than that in Group C 10 days after surgery the difference between Group A and Group B was not statistically significant.(4)The differences in preoperative alveolar bone height,width and bone density between the three groups were not statistically significant;(5)The alveolar bone height,width and bone density of the three groups decreased at 3 and 6 months after surgery compared with those before surgery,with the greatest decrease at 3 months after surgery and an increase at 6 months,but they were still lower than before surgery.(6)The values of alveolar bone height,width and bone density at 3and 6 months after surgery were higher in Group B than in Group A than in Group C.Conclusion:(1)The alveolar ridge preservation technique reduces alveolar bone resorption,promotes alveolar bone regeneration and has a beneficial effect on wound healing;(2)Bio-Oss bone powder and medical collagen sponge are better than natural healing in terms of postoperative bleeding,wound healing and alveolar bone quality and morphology when used in extraction sockets;(3)there is no significant difference in postoperative bleeding and wound healing when using Bio-Oss bone powder and medical collagen sponge for alveolar ridge preservation;(4)Bio-Oss bone powder is superior to medical collagen sponges for bone formation. |
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