Influence of titanium base, lithium disilicate restoration and vertical soft tissue thickness on bone stability around triangular- shaped implants. A prospective clinical trial
| Author | Affiliation |
|---|---|
Linkevičius, Tomas | Vilniaus universitetas |
Puišys, Algirdas | UAB Vilniaus implantologijos centro klinika |
Linkevičienė, Laura | Vilniaus universitetas |
Andrijauskas, Paulius | Vilniaus universitetas |
| Date |
|---|
2018-10-11 |
ISSN 1600-0501 (Electronic) 0905-7161 (Linking).
no. 11364
Background : Over 2 decades ago Berglundh and Lindhe have shown that vertical mucosal tissue thickness is one of the most important factors to influence early crestal bone loss (Berglundh & Lindhe 1996). Recently newly designed implant was introduced, which has reduction of the neck on 3 sides, which makes it similar to triangular- shaped implant neck, compared to traditional circular contour, providing “compression- free” zone to alveolar crest during implant placement. Aim/Hypothesis : To evaluate how vertical mucosal tissue thickness affect crestal bone stability around triangular- shaped bone level implants, restored with low profile titanium bases and monolithic lithium disilicate restorations. Material and Methods : Sixty triangular- shaped bone level implants of 4.3 mm diameter were placed in 56 patients (22 males and 34 females, mean age 48.3 ± 3.4 y). According to vertical mucosal thickness patients were assigned into 3 equal groups- 1 (thin, 2 mm or less), 2 (medium, 2.5 mm) and 3 (thick, 3 mm and more). Implants were placed in posterior mandible and maxilla in one- stage approach and after integration were restored with single screw- retained monolithic lithium disilicate crowns, using low gingival profile titanium bases. Radiographic examina- tion was performed after implant placement and after 1- year follow- up. Crestal bone loss was registered mesially and distally, and mean value calculated. Mann- Whitney U- test was applied and significance was set to 0.05. Results : Mean vertical tissue thickness in 1 group was 1.76 ± 0.26 mm, 2 group – 2.5 mm and 3.91 ± 0.59 mm in group 3, with statistically significant difference between all groups ( P < 0.001). After 1 year follow- up implants in group 1 (thin) had 1.25 ± 0.8 mm bone loss. Implants in group 2 (medium) had 0.98 ± 0.06, while implants in 3 group (thick) implants lost 0.43 ± 0.37 mm of crestal bone. Tukey ’ s HSD test showed that di[...].