| Objective:To observe the short-term clinical effectiveness of the bone ring graft technique and summary the key points of relating surgical operation in order to provide a comprehensive clinical guidelines.Methods:Seven patients with sever alveolar bone absorption were selected to receive the bone ring grafting and immediate dental implant. Final fixed prosthesis were cemented five months after initial implantation. CT scans were conducted on all subjects before the procedure, three months to five months post-operative to evaluate alveolar bone height and the level of bone height and absorption around the implants. Three months after installed the prosthesis, each implant’s Jemt classification, gingiva attachment and probing depth were analyzed. The difference of PD between implants and adjacent teeth and the difference of the bone absorption between labial and lingual side were compared. The survival rate of bone ring and the retention rate of implants were calculated. The complications and patients’satisfaction were also investigated. RESULT:Bone grafts’survival rates were89%and dental implantation retention rate was100%three to five months post operation. Average bone level increase was6.94mm; average bone absorption was2.64mm; average bone thickness at the neck of the dental implant body was7.52mm; average level of mesial gingival attachment was1.94mm and average level of distal gingival attachment was1.81mm. Buccal-lingual side of alveolar bone absorptions and the probing depth around implant body and adjacent teeth were statistically insignificant. No major post operative complication was observed, restorations were successful and patient’s satisfaction level was high.Conclusion:Bone ring graft technique and immediate dental implantation are relatively simple to perform and these techniques facilitate reduction in required treatment time. Short-term effect is reliable and satisfactory, while the long-term outcomes require further follow up and study. |
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