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| Effect of modified crown extension and orthodontic traction plus crown extension on upper anterior gingival defect |
| MO Zhiyuan GAO Yongbo |
| Department of Stomatology, Hangzhou Red Cross Hospital, Zhejiang Province, Hangzhou 310000, China |
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Abstract Objective To investigate the effect of modified crown extension and orthodontic traction plus crown extension in the treatment of upper anterior gingival defect. Methods A total of 150 patients with anterior gingival defect diagnosed by the Department of Stomatology, Hangzhou Red Cross Hospital of Zhejiang Province from June 2015 to October 2018 were selected and divided into control group and observation group according to random number table method, with 75 patients in each group. The control group was treated with modified crown extension, while the observation group was given orthodontic traction plus crown extension. The results of restoration and periodontal health, including tooth mobility (TM), probing pocket depth (PPD), gingival index (GI), gingival sulcus bleeding index (SBI), plaque index (PLI), were compared between the two groups. Results There was no significant difference in the rate of excellent and good repair between the two groups at 1 month after operation (P > 0.05). PPD, SBI, PLI, GI and TM of the two groups at 1 month after operation were lower than those before operation (P < 0.01), but there were no significant differences in PPD, SBI, PLI, GI and TM between the two groups at 1 month after operation (P > 0.05). The crown height at 6 and 12 weeks after operation were higher than that at 2 weeks after operation (P < 0.01); there was no significant difference in the incidence of follow-up complications between the two groups (P > 0.05). Conclusion Modified crown extension, orthodontic traction and crown extension can effectively repair the upper anterior gingival defect, improve the periodontal health status, promote crown height recovery, and have fewer postoperative complications. The treatment method can be selected according to the actual situation and needs of the individual.
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