J Periodontal Implant Sci.  2018 Jun;48(3):174-181. 10.5051/jpis.2018.48.3.174.

A radiographic evaluation of graft height changes after maxillary sinus augmentation

• Kim DH
• Ko MJ
• Lee JH
• Jeong SN

• KMID: 2414930
• DOI: http://doi.org/10.5051/jpis.2018.48.3.174

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.
METHODS
A total of 39 maxillary posterior implants placed during a simultaneous sinus lift procedure were evaluated. Panoramic radiographs of all patients were taken immediately after implant installation and at 3 months, 6 months, 1 year, 2 years, and 3 years. To analyze graft height changes over time, we measured the distance between the implant platform and the base of the grafted sinus floor at 3 locations. The radiographs were analyzed by a single examiner.
RESULTS
Graft height tended to decrease over time, and a statistically significant difference was observed at 2 years compared to baseline (P < 0.05). There was no statistically significant difference in graft height change according to the surgical approach or tooth type. For residual bone height, a statistically significant difference in graft height change was found between those with 4-7 mm of residual bone height and those with ≥7 mm (P < 0.05).
CONCLUSIONS
Graft height after sinus lift procedures significantly decreased at 2 years compared to baseline after sinus augmentation. Further studies should be done with controlled variables, and prospective studies with 3-dimensional images are needed to clarify the factors that influence graft height changes.

Keyword

Alveolar bone grafting; Dental implants; Sinus floor augmentation

MeSH Terms

Alveolar Bone Grafting
Dental Implants
Humans
Maxillary Sinus*
Prospective Studies
Sinus Floor Augmentation
Tooth
Transplants*
Dental Implants

Figure

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  Figure 1 Radiographic 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.

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