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Ligature-induced peri-implant infection in crestal and subcrestal implants: a clinical and radiographic study in dogs.

Huang B, Piao M, Zhang L, Wang X, Xu L, Zhu W, Meng H - PeerJ (2015)

Bottom Line: Results.The alterations of peri-implant probing depths, clinical attachment levels, distances from the IAI to the first bone-implant contact (IAI-fBIC) and depths of infrabony defect were significant larger in the subcrestal groups compared with the crestal groups during the plaque accumulation period.Conclusion.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University , Guangzhou , China ; Guangdong Provincial Key Laboratory of Stomatology , Guangzhou , China ; Department of Periodontology, Peking University School and Hospital of Stomatology , Beijing , China.

ABSTRACT
Objective. The aim of this study was to assess the influence of implant-abutment interface (IAI) placement depths on peri-implant tissues in the presence of ligature-induced peri-implant inflammation. Materials and Methods. Two implants with screwed-in IAIs (SI) and two implants with tapped-in IAIs (TI) were inserted in one side of the mandible in six dogs eight weeks after tooth extraction. Four experimental groups were constituted: SI placed crestally, SI placed 1.5 mm subcrestally, TI placed crestally and TI placed 1.5 mm subcrestally. After 12 weeks, the healing abutments were connected. Four weeks later, cotton floss ligatures were placed around the abutments to promote plaque accumulation. Clinical and radiographic examinations were performed at 0, 6 and 12 weeks after ligature placement. The effects of the IAI placement depths on clinical and radiographic parameters were assessed. Results. The alterations of peri-implant probing depths, clinical attachment levels, distances from the IAI to the first bone-implant contact (IAI-fBIC) and depths of infrabony defect were significant larger in the subcrestal groups compared with the crestal groups during the plaque accumulation period. The alterations of clinical attachment levels, IAI-fBIC, depth of the infrabony defect and horizontal bone loss were not significantly different between the SI and TI groups after ligature placement. Conclusion. Tissue destruction in subcrestal implants may be more serious than that in crestal implants in the presence of inflamed peri-implant mucosa.

No MeSH data available.


Related in: MedlinePlus

Plotting of the means of clinical and radiographic parameters for all groups after ligature-induced peri-implant infection.(A) PD; (B) CAL; (C) IAI-fBIC; (D) Ridge loss; (E) Ridge-fBIC; (F) HBL.
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fig-4: Plotting of the means of clinical and radiographic parameters for all groups after ligature-induced peri-implant infection.(A) PD; (B) CAL; (C) IAI-fBIC; (D) Ridge loss; (E) Ridge-fBIC; (F) HBL.

Mentions: The means of PD and CAL of all groups were statistically increased during the dynamic period when comparing the baseline data with 6-week and 12-week data, respectively (P < 0.05) (Figs. 4A and 4B). After ligature placement, the PD alterations depended on the IAI placement depth (P < 0.001) and IAI type (P = 0.010) but not on the interaction between the IAI placement depth and the IAI type (P = 0.953) (Tables 1 and 2). PD alterations in the subcrestal groups were significant larger than that in the equicrestal groups. PD alterations in the TI groups were significantly greater than those in the SI groups. The CAL alterations depended on the IAI placement depth (P < 0.001) but not on the IAI type (P = 0.101) or the interaction between the IAI placement depth and the IAI type (P = 0.523).


Ligature-induced peri-implant infection in crestal and subcrestal implants: a clinical and radiographic study in dogs.

Huang B, Piao M, Zhang L, Wang X, Xu L, Zhu W, Meng H - PeerJ (2015)

Plotting of the means of clinical and radiographic parameters for all groups after ligature-induced peri-implant infection.(A) PD; (B) CAL; (C) IAI-fBIC; (D) Ridge loss; (E) Ridge-fBIC; (F) HBL.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4525689&req=5

fig-4: Plotting of the means of clinical and radiographic parameters for all groups after ligature-induced peri-implant infection.(A) PD; (B) CAL; (C) IAI-fBIC; (D) Ridge loss; (E) Ridge-fBIC; (F) HBL.
Mentions: The means of PD and CAL of all groups were statistically increased during the dynamic period when comparing the baseline data with 6-week and 12-week data, respectively (P < 0.05) (Figs. 4A and 4B). After ligature placement, the PD alterations depended on the IAI placement depth (P < 0.001) and IAI type (P = 0.010) but not on the interaction between the IAI placement depth and the IAI type (P = 0.953) (Tables 1 and 2). PD alterations in the subcrestal groups were significant larger than that in the equicrestal groups. PD alterations in the TI groups were significantly greater than those in the SI groups. The CAL alterations depended on the IAI placement depth (P < 0.001) but not on the IAI type (P = 0.101) or the interaction between the IAI placement depth and the IAI type (P = 0.523).

Bottom Line: Results.The alterations of peri-implant probing depths, clinical attachment levels, distances from the IAI to the first bone-implant contact (IAI-fBIC) and depths of infrabony defect were significant larger in the subcrestal groups compared with the crestal groups during the plaque accumulation period.Conclusion.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University , Guangzhou , China ; Guangdong Provincial Key Laboratory of Stomatology , Guangzhou , China ; Department of Periodontology, Peking University School and Hospital of Stomatology , Beijing , China.

ABSTRACT
Objective. The aim of this study was to assess the influence of implant-abutment interface (IAI) placement depths on peri-implant tissues in the presence of ligature-induced peri-implant inflammation. Materials and Methods. Two implants with screwed-in IAIs (SI) and two implants with tapped-in IAIs (TI) were inserted in one side of the mandible in six dogs eight weeks after tooth extraction. Four experimental groups were constituted: SI placed crestally, SI placed 1.5 mm subcrestally, TI placed crestally and TI placed 1.5 mm subcrestally. After 12 weeks, the healing abutments were connected. Four weeks later, cotton floss ligatures were placed around the abutments to promote plaque accumulation. Clinical and radiographic examinations were performed at 0, 6 and 12 weeks after ligature placement. The effects of the IAI placement depths on clinical and radiographic parameters were assessed. Results. The alterations of peri-implant probing depths, clinical attachment levels, distances from the IAI to the first bone-implant contact (IAI-fBIC) and depths of infrabony defect were significant larger in the subcrestal groups compared with the crestal groups during the plaque accumulation period. The alterations of clinical attachment levels, IAI-fBIC, depth of the infrabony defect and horizontal bone loss were not significantly different between the SI and TI groups after ligature placement. Conclusion. Tissue destruction in subcrestal implants may be more serious than that in crestal implants in the presence of inflamed peri-implant mucosa.

No MeSH data available.


Related in: MedlinePlus