| Literature DB >> 29984047 |
Do-Hyung Kim1, Min-Jeong Ko1, Jae-Hong Lee1, Seoung-Nyum Jeong1.
Abstract
PURPOSE: The aims of the present study were to quantitatively assess graft height changes after sinus lift procedures and to analyze the factors that influenced graft height changes, including the residual bone height before surgery, surgical approach, and tooth type.Entities:
Keywords: Alveolar bone grafting; Dental implants; Sinus floor augmentation
Year: 2018 PMID: 29984047 PMCID: PMC6031761 DOI: 10.5051/jpis.2018.48.3.174
Source DB: PubMed Journal: J Periodontal Implant Sci ISSN: 2093-2278 Impact factor: 2.614
Figure 1Radiographic measurements of graft height change using a panoramic radiograph. Lower dotted line and upper dotted line mean implant platform and grafted sinus floor, respectively.
a: The distance from the implant platform to the base of grafted sinus floor at the mesial side of the implant, b: The distance from the implant platform to the base of the grafted sinus floor at the middle side of the implant, c: The distance from the implant platform to the base of the grafted sinus floor at the distal side of the implant.
Change in graft height over time
| Period | MeGH (n=39) | MiGH (n=39) | DiGH (n=39) | Mean GH (n=39) |
|---|---|---|---|---|
| Baseline | 16.25±3.20 | 16.96±3.39 | 16.27±2.98 | 16.49±3.03 |
| 3 mon | 15.94±3.76 | 16.31±3.91 | 15.66±3.56 | 15.97±3.59 |
| 6 mon | 15.38±3.56 | 15.50±4.02a) | 15.20±3.89 | 15.36±3.69a) |
| 1 yr | 14.97±3.44 | 15.47±3.22a) | 14.96±3.53a) | 15.13±3.31a) |
| 2 yr | 14.31±3.16a) | 14.83±2.88a) | 14.41±3.34a) | 14.52±3.02a) |
| 3 yr | 13.99±3.23a) | 14.61±2.68a) | 14.17±3.32a) | 14.26±2.92a) |
| 3 yr to baseline | −2.26±3.29a) | −2.35±2.90a) | −2.10±2.24a) | −2.24±2.41a) |
Values are presented as mean±standard deviation (mm).
MeGH: distance from the implant platform to the base of the grafted sinus floor at the mesial side of the implant, MiGH: distance from the implant platform to the base of the grafted sinus floor at the middle side of the implant, DiGH: distance from the implant platform to the base of the grafted sinus floor at the distal side of the implant, ANOVA: analysis of variance.
a)Statistically significant decrease in height compared to baseline (P<0.05) by 1-way ANOVA.
Comparison of graft height changes between successive observation periods
| Period | MeGH (n=39) | MiGH (n=39) | DiGH (n=39) | Mean GH (n=39) |
|---|---|---|---|---|
| Baseline to 3 mon | −0.31±1.62 | −0.65±2.17 | −0.61±2.24 | −0.52±1.71 |
| 3 mon to 6 mon | −0.57±1.85 | −0.81±2.10 | −0.46±1.76 | −0.62±1.50 |
| 6 mon to 1 yr | −0.41±1.35 | −0.03±1.73 | −0.24±1.24 | −0.23±1.18 |
| 1 yr to 2 yr | −0.66±1.79 | −0.64±1.46 | −0.55±1.33 | −0.61±1.40 |
| 2 yr to 3 yr | −0.32±1.27 | −0.22±1.09 | −0.25±0.94 | −0.21±1.06 |
Values are presented as mean±standard deviation (mm). No statistically significant difference in graft height change was detected between any successive observation periods (P>0.05).
MeGH: distance from the implant platform to the base of the grafted sinus floor at the mesial side of the implant, MiGH: distance from the implant platform to the base of the grafted sinus floor at the middle side of the implant, DiGH: distance from the implant platform to the base of the grafted sinus floor at the distal side of the implant.
Comparison of mean graft height changes according to residual bone height
| Group | 3 mon | 6 mon | 1 yr | 2 yr | 3 yr |
|---|---|---|---|---|---|
| <4 mm (n=14) | −0.36±4.64 | −0.83±4.49 | −1.29±4.26a) | −2.25±3.67a) | −2.39±3.21a) |
| ≥4 and <7 mm (n=17) | −0.76±3.00 | −1.54±3.21 | −1.71±2.83a) | −2.20±2.89a) | −2.85±1.93a,b) |
| ≥7 mm (n=8) | −0.31±2.03 | −0.82±2.76 | −0.74±2.03a) | −1.00±1.79a) | −0.67±0.40a,b) |
| 0.300 | 0.220 | 0.150 | 0.070 | 0.015 |
Values are presented as mean±standard deviation (mm).
ANOVA: analysis of variance.
a)Statistically significant decrease in height compared to baseline (P<0.05) by 1-way ANOVA; b)Statistically significant difference between 2 groups (P<0.05) by ANOVA for repeated measures.
Comparison of mean graft height changes according to surgical approach methods
| Group | 3 mon | 6 mon | 1 yr | 2 yr | 3 yr |
|---|---|---|---|---|---|
| Crestal approach (n=20) | −0.54±2.23 | −1.51±2.48 | −1.54±2.23a) | −1.84±1.99a) | −1.86±2.22a) |
| Lateral window approach (n=19) | −0.50±4.49 | −0.74±4.32 | −1.24±3.96a) | −2.11±3.71a) | −2.54±2.43a) |
Values are presented as mean±standard deviation (mm).
ANOVA: analysis of variance.
a)Statistically significant decrease in height compared to baseline (P<0.05) by 1-way ANOVA; No statistically significant difference in graft height change was detected between the 2 surgical approach groups (P>0.05) by ANOVA for repeated measures.
Comparison of mean graft height change according to tooth type
| Group | 3 mon | 6 mon | 1 yr | 2 yr | 3 yr |
|---|---|---|---|---|---|
| First premolar (n=3) | −1.52±2.84 | −3.45±2.30a) | −2.67±2.30a) | −3.27±1.03a) | −3.64±3.18a) |
| Second premolar (n=10) | 0.14±3.32 | −0.37±3.45a) | −0.56±2.87a) | −0.89±3.25a) | −1.72±1.20a) |
| First molar (n=20) | −0.47±3.93 | −1.12±3.97a) | −1.50±3.68a) | −2.37±2.93a) | −2.37±2.93a) |
| Second molar (n=6) | −1.27±3.09 | −1.29±2.18a) | −1.55±2.59a) | −2.06±2.11a) | −1.93±1.78a) |
Values are presented as mean±standard deviation (mm).
ANOVA: analysis of variance.
a)Statistically significant decrease in height compared to baseline (P<0.05) by 1-way ANOVA; No statistically significant difference in graft height change was detected among different tooth types (P>0.05) by ANOVA for repeated measures.