Influence of nickel-chromium alloy and gold-platinum alloy PFM on canine gingival tissues
10.3969/j.issn.1001-3733.2009.06.09
- VernacularTitle:镍铬合金与金铂合金烤瓷熔附金属全冠对犬牙龈组织的形态学影响
- Author:
Xin LI
;
Caifeng BA
;
Rui ZHOU
;
Zhiying WANG
- Publication Type:Journal Article
- Keywords:
Dog;
Gingival tissue;
Apoptosis;
Ultramicrostructure;
Nickel-chromium alloy;
Gold-platinum alloy;
Porcelain fused to metal
- From:
Journal of Practical Stomatology
2009;25(6):803-807
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To compare the influence of nickel-chromium alloy and gold-platinum alloy porcelain-fused-to-metal ( PFM ) on ultramicrostructure of canine gingival tissues, to survey the biological effects after PFM full crown restoration, and to provide data for selection of PFM materials. Methods; The nickel-chromium alloy and gold-platinum alloy PFM full crowns were used to repair canines in 3 healthy dogs. The microstructure of canine gingival tissue was observed through light microscope and transmission electron microscope. Apoptosis of canine gingival cells was detected by TUNEL method. Results; Under light microscope, inflammatory cell infiltration and partial bleeding were seen in the nickel-chromium alloy PFM full crown repaired canine gingival tissues. Under transmission electron microscope, large amount of cell apoptosis and neuclear condensation were observed in these tissues,and apoptotic index was 58.63% ±11. 12%. While under light microscope, inflammatory cell infiltration and partial bleeding were not seen in the gold-platinum metal PFM full crown repaired canine gingival tissues. Under transmission electron microscope, only small amount of cell apoptosis was detected in these tissues,and apoptotic index was 26. 90% ± 17. 35%. Statistical significance was found in both nickel-chromium alloy group and gold-platinum metal group compared to control group. There was also statistical significance between nickel-chromium alloy group and gold-platinum metal group in cell apoptosis numbers (P <0. 05). Cell apoptosis number in nickel-chromium alloy group was much higher than that in gold-platinum metal group. Conclusion; The negtive effects on ultramicrostructure of gingival tissue using nickel-chromium alloy PFM are more evident than using gold-platinum metal. When select PFM to repair defect teeth, it is better to select the inactive gold-platinum metal PFM as base crown.
