前牙拔牙位点保存术后牙槽嵴软硬组织变化的临床研究

Abstract

Abstract: Objective To evaluate the changes of alveolar bone and soft tissue after 6 months of the front tooth extraction site preservation by cone beam computed tomography (CBCT) and model measurement. Method A total of 32 teeth from 29 patients with indications for the front tooth extraction were enrolled. Deproteinized boving bone mineral (DBBM, Bio-Oss) and absorbable biofilm (Hao) were used in experimental group, when the extraction site was performed, and the control group received no special treatment after routine extraction. The gypsum model was employed before the operation (baseline) and after six months, while the CBCT was taken immediately after the operation (baseline) and six months later as well. The changes of alveolar bone and soft tissue were analyzed by CBCT and model measurement. Results The data obtained by CBCT were statistically significant in height of labial and temporal alveolar bone(P<0.05). After 6 months, the labial and temporal alveolar bone height of the experimental group was significantly higher than that of the control group (P<0.05), which were 16.31± 0.94m and 18.61 ± 1.10mm respectively. The alveolar bone width, measured at 20% and 70% of the root length, were also significantly higher than the control group (P<0.05), which were 4.43 ± 0.32mm and 4.79 ± 0.37mm respectively, but there was no significant difference between two groups at 50% of the root length (P>0.05). The soft tissue was significantly higher in the control group (9.26 ± 0.40 mm) than the treatment group (P < 0.05) at the highest point of the maxillary gingival margin and the lowest point of the mandibular gingival margin, but in soft tissue between mesial papilla and distal nipple, there was no statistically significant difference (P>0.05). Conclusions The simultaneous preservation of extraction sites of the front teeth have positive significance for the preservation of height, width and alveolar soft tissue after tooth extraction, which is worthy of promotion in clinical practice.

Key words: Extraction site preservation, Height and width of alveolar ridge, Height of soft tissue

CLC Number:

R782.11

References

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Clinical research on changes of soft and hard tissue after the preservation in the front tooth extraction sites

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