[Clinical evaluation of wedge-shaped defect restored by gingival retraction technique].
OBJECTIVE
To evaluate the periodontal conditions after the wedge-shaped defect was restored by gingival retraction technique.


METHODS
A total of 138 mandibular premolars with wedge-shaped defect were selected and divided into A, B groups. Group A was restored with Dyract after using retraction cord. Group B was directly restored with Dyract. Clinical parameters including plaque index (PLI), gingival index (GI), sulcus bleeding index (SBI), probing depth (PD), volumes of gingival crevicular fluid (GCF) and levels of aspartate aminotransferases (AST) of gingival crevicular fluid were measured at baseline, 1 week, 1 month, 3 months and 6 months after operation.


RESULTS
There was no difference in PLI, GI, SBI, PD between group A and B during 6 months after operation, while the difference of GCF and AST was significant between group A and B at 3 months and 6 months after operation (P < 0.05, P < 0.01).


CONCLUSIONS
Gingival retraction technique applied in wedge-shaped defect restoration can reduce the damage to the periodontal tissue.
Yang
Wei-jiang
WJ
Center of Stomatology, Taizhou Hospital, Zhejiang Province, Linhai Zhejiang 317000, China. weijiangyang@sohu.com
Shi
Geng-sheng
GS
Liang
Li-rong
LR
Ruan
Fang-chao
FC
Gao
Hui-juan
HJ
Tong
Yong-qing
YQ
D000293:Adolescent; D000328:Adult; D001219:Aspartate Aminotransferases / Q000032:analysis; D003774:Dental Plaque Index; D003793:Dental Restoration, Permanent / Q000379:methods*; D005260:Female; D005883:Gingival Crevicular Fluid / Q000201:enzymology; D006801:Humans; D008297:Male; D010512:Periodontal Index; D055815:Young Adult
D001219:Aspartate Aminotransferases