Retrospective clinical study of new tapered design implants(TSIV) in maxillary posterior areas
By: Moon-Jung Jang, Pil-Young Yun, Young-Kyun Kim
Purpose
The aim of the present study was to evaluate the clinical outcome of new tapered design implants installed in maxillary posterior areas.
Materials & Methods
From Jun 2011 through October 2012, 17 patients (14 men, 3 women) treated with tapered implants (Osstem TS IV) were considered. Thirty-eight implants (6 premolar and 32 molar) were placed in maxillary posterior areas. Implant stability and crestal bone loss were measured.
Fig 1. Osstem TS IV implant. A: Diagram of Osstem TS IV implant; D: diameter, L: length. B: Periapical view of Osstem TS IV implant.
Fig 1. Osstem TS IV implant. A: Diagram of Osstem TS IV implant; D: diameter, L: length. B: Periapical view of Osstem TS IV implant.Results
The implant stability quotient value was 59.9 at implant placement and 70.5 at the second surgery, indicating a significant difference. Mean crestal bone loss was 0.15 ± 0.15 mm (no sinus elevation group: 0.10 ± 0.13 mm; sinus elevation and simultaneous group: 0.16 ± 0.15 mm; sinus elevation and delayed group: 0.20 ± 0.19 mm). There was no significant difference according to sinus elevation or between the simultaneous group and delayed group. The success rate was 97.4%, and the survival rate was 97.4%.
| Table 1. Number of Implant according to Implant Length and Diameter | ||||
| Length (mm) | Diameter | |||
| 4 | 4.5 | 5 | Total | |
| 8.5 | 3 | 3 | ||
| 10 | 2 | 3 | 13 | 18 |
| 11.5 | 2 | 14 | 16 | |
| Total | 4 | 3 | 30 | 37 |
| Values are presented as number | ||||
| Table 2. Initial Stability | |
| Initial Stability (ISQ) | Value |
| ≤ 39 | 5 |
| 40-49 | 4 |
| 50-59 | 3 |
| 60-69 | 8 |
| 70-79 | 11 |
| ≥ 80 | 1 |
| Total | 32 |
| Values are presented as number. ISQ: implant stability quotient | |
| Table 3. Secondary Stability | |
| Secondary Stability (ISQ) | Value |
| ≤ 59 | 1 |
| 60-69 | 5 |
| 70-79 | 7 |
| ≥ 80 | 1 |
| Total | 14 |
| Values are presented as number. ISQ: implant stability quotient | |
| Table 4. Crestal bone loss according to surgical procedure | |
| Surgical Procedure | Value |
| No sinus elevation | 7(0.10 ± 0.13)* |
| Sinus elevation | 28 (0.17 ± 0.16)* |
| Values are presented as number or mean standard deviation (mm). *No statistically significant difference by surgical procedure (p=0.196) | |
| Table 5. Crestal bone loss according to timing of implant placement | |
| Timing of implant placement | Value |
| Sinus elevation + Immediate | 22 (0.16 ± 0.15)* |
| Sinus elevation + Delayed | 6 (0.2 ± 0.2)* |
| Values are presented as number of mean ± standard deviation (mm) *No statistically significant difference by timing of implant placement (p=0.690) |
|
Conclusion
New tapered design implants should be applied to maxillary posterior areas.
