Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (20): 3641-3645.doi: 10.3969/j.issn.1673-8225.2010.20.008

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Effects of immediate implant combined with disposal of soft tissues on morphology of peri-implant soft tissues

Guo Li-qiang1, Zheng Jun2, Liu Yi1, Xu Jia-sen1, Zhao Bao-dong1   

  1. 1The Affiliated Hospital of Medical College, Qingdao University, Qingdao  266003, Shandong Province, China;
    2Hekou Hospital of Shengli Petroleum Administration Bureau, Bureau Dongying  272500, Shandong Province, China
  • Online:2010-05-14 Published:2010-05-14
  • Contact: Zhao Bao-dong, Master’s supervisor, Chief physician, the Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, Shandong Province, China zbd315@sina.com
  • About author:Guo Li-qiang, Studying for master’s degree, the Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, Shandong Province, China glq2312@163.com

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Abstract:

BACKGROUND: Due to top attached gingival defect, labial slipping mucoperiosteum flaps, free gingival flaps, acellular dermal matrix (ADM) and one-stage surgery of two-stage implants were used after immediate implant to close the soft tissue defect. However, the current study is limited to clinical case report, and relevant research and analysis of animal experimentation is absented.
OBJECTIVE: To establish animal models and to explore the influence of labial slipping mucoperiosteum flaps, free gingival flaps, ADM and one-stage surgery of two-stage implants disposals on morphology of peri-implant soft tissues.
METHODS: Healthy adult dogs were selected. Their second, fourth premolars of mandibles were extracted, and BLB implants were placed immediately into the sockets of the mesial or distal roots by means of self-comparing. Four groups, including slipping mucoperiosteum flaps, free gingival flaps, ADM, and one-stage surgery were divided according operation. The second stage operation was performed in the former three groups at 3 months later. PFM crowns were fixed in each group 2 weeks later. After making ground section of bone with dental implant, histological observation was researched. Before extraction and after 1 month loaded, the probing depth of gingival groove, indexes of gingiva and width of attached gingiva were measured for statistical analysis in each group.
RESULTS AND CONCLUSION: Soft tissues of each group had good healing. The junctional epithelium, which was similar to the natural periodontal structure, could be seen at the implant-soft tissue interface. The slipping mucoperiosteum flaps group got poor outcomes due to the damage of peri-implant soft tissues. The other disposals could effectively close the wound and had no effects on peri-implant soft tissues. The probing depth had no obviously changed prior to and after operation in all groups, but the gingiva indexes were significantly increased at 1 month after operation (P < 0.05), and the width of attached gingiva of the slipping mucoperiosteum flaps group was dramatically decreased after operation (P < 0.001). The technology of disposal of soft tissue on immediate implants was feasible.

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