Expression of heat shock protein 27 in cigarette smoke extract-induced injury of human gingival fibroblasts / 华西口腔医学杂志

<p><b>OBJECTIVE</b>This research aimed to observe the expression of heat shock protein 27 (HSP27) in human gingival fibroblasts (HGFs) cell injury induced by different concentrations of cigarette smoke extract (CSE).</p><p><b>METHODS</b>The third to eighth generations of cultured HGFs were treated with serially diluted CSE of different concentrations (0, 2.5%, 5.0%, 12.5%, 25.0%, 50.0%). Wound-healing assay was performed to determine the migration of HGFs, and Western blot was used to determine the expression of HSP27.</p><p><b>RESULTS</b>The migration capability of HGFs weakened with the increase of CSE concentration. HSP27 expression was negative in normal HGFs but positive in CSE-intervened HGFs in a concentration-dependent manner.</p><p><b>CONCLUSION</b>HSP27 concentration increased in the CSE-induced injury of HGFs. This finding suggests that HSP27 plays an important role in CSE-induced epithelial injury.</p>

Short-term evaluation of clinical effect of bone ring grafting and immediate insertion / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To observe the short-term clinical effectiveness of bone ring graft technique and to summarize the key points of related surgical operation to provide comprehensive clinical guidelines.</p><p><b>METHODS</b>Fifteen patients with severe alveolar bone absorption were selected to receive bone ring grafting and immediate dental implant. Final fixed prostheses were cemented five months after initial implantation. Cone beam CT scans were conducted on all subjects before the procedure, as well as four months post-operation to evaluate alveolar bone height and level of bone height and absorption around the implants. Four to six months after prosthesis installation, each implant's Jemt classification, gingiva attachment, and probing depth (PD) were analyzed. The difference of PD between implants and adjacent teeth, as well as the difference of the bone absorption between labial and lingual sides, was compared. The survival rate of the bone ring and the retention rate of implants were calculated. Complications and patient satisfaction were also investigated.</p><p><b>RESULTS</b>Bone graft survival rate was 94.4% and dental implantation retention rate was 100% four months post-operation. Average bone level increase was (6.06 +/- 1.06) mm, average bone absorption was (1.33 +/- 0.84) mm, and average bone thickness at the neck of the dental implant body was (6.94 +/- 0.73) mm. Approximately 4 to 6 months after crown restoration, average bone level increase was (5.62 +/- 1.03) mm, average bone absorption was (1.51 +/- 1.02) mm, and average bone thickness at the neck of the dental implant body was (6.77 +/- 0.72) mm. The PD around the implant body and the adjacent teeth was statistically insignificant. No major post-operative complication was observed, restorations were successful, and patient satisfaction level was high.</p><p><b>CONCLUSION</b>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, whereas long-term outcomes require further follow up and study.</p>