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KMID : 1044820200500040226
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Journal of Periodontal & Implant Science
2020 Volume.50 No. 4 p.226 ~ p.237
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Effects of soft tissue grafting prior to orthodontic treatment on preventing gingival recession in dogs
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Song Young-Woo
Jung Hee-Kyu
Han Seo-Yeon
Paeng Kyeong-Won
Kim Myong-Ji
Cha Jae-Kook
Choi Yoon-Jeong
Jung Ui-Won
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Abstract
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Purpose: This study was conducted to assess the efficacy of prophylactic gingival grafting in the mandibular anterior labial area for preventing orthodontically induced gingival recession.
Methods: Eight mongrel dogs received gingival graft surgery at the first (I1) and third (I3) mandibular incisors on both sides based on the following group allocation: AT group (autogenous connective tissue graft on I1), AT-control group (contralateral side in the AT group), CM group (xenogeneic cross-linked collagen matrix graft on I3) and CM-control group (contralateral side in the CM group). At 4 weeks after surgery, 6 incisors were splinted and proclined for 4 weeks, followed by 16 weeks of retention. At 24 weeks after surgery, casts were made and compared with those made before surgery, and radiographic and histomorphometric analyses were performed.
Results: Despite the proclination of the incisal tip (by approximately 3 mm), labial gingival recession did not occur. The labial gingiva was thicker in the AT group (1.85±0.50 mm vs. 1.76±0.45 mm, P>0.05) and CM group (1.90±0.33 mm vs. 1.79±0.20 mm, P>0.05) than in their respective control groups.
Conclusions: The level of the labial gingival margin did not change following labial proclination of incisors in dogs. Both the AT and CM groups showed enhanced gingival thickness.
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KEYWORD
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Animal research, Collagen, Connective tissue, Gingival recession, Orthodontic tooth movement
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