Abstract : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
The long-term stability of maxillary sinus floor augmentation with β-TCP remains largely unknown. We report the long-term assessment of volumetric changes in maxillary sinus floor augmentation with β-TCP by cone-beam computed tomography (CBCT).
The subjects included 30 patients who underwent maxillary sinus floor augmentation using β-TCP and 58 implant placement for unilateral maxillary defect, simultaneously. Volumetric changes in β-TCP and the height of peri-implant bone were analyzed by CBCT.
In all patients, the mean volume of the grafted bone decreased from immediately after implant placement to 6 months after implant placement (75.6 % reduction rate); it decreased further at 2.5 years after implant placement (54.9 % reduction rate). The mean of the height from the implant tip to the maxillary sinus floor was 2.00 ± 1.51 mm, 0.73 ± 1.33 mm, and −0.72 ± 1.11 mm immediately, 6 months, and 2.5 years after implant placement, respectively. The implant tip protruded beyond the maxillary sinus floor in approximately 70 % of the implants (41/58 implants) at 2.5 years after surgery. During the observation period, the implant survival rate was 100 %.
The radiographic analysis by CBCT is considerably more advanced than previous radiographic examinations. Although maxillary sinus pneumatization continues to progress ≥1 year after maxillary sinus floor augmentation with β-TCP, it stabilizes 3 years after surgery.
Serial posts:
- Abstract : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Background : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [1]
- Background : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [2]
- Methods : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [1]
- Methods : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [2]
- Methods : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [3]
- Results : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [1]
- Results : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [2]
- Discussion : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [1]
- Discussion : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [2]
- Conclusions : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- References : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [1]
- References : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography [2]
- Acknowledgements : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Author information : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Additional information : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Rights and permissions : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- About this article : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 1 Age groups of the 30 patients : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 2 Observation period : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 3 The number of implants according to site : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 4 The distribution of CBCT examination after 2.5 years : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 5 Radiographic examination of BV (volumetric changes in graft bone over time) : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 6 Radiographic examination of BH (changes in bone height surrounding the implant) : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 7 The radiographic measurements of liner parameters at immediately after surgery (RBH, IL, SW) : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Table 8 Examination of the impact of RBH, IL, SW, and iBH in the height from the implant tip to the bone integration site (BH) : Long-term radiographic assessment of maxillary sinus floor augmentation using beta-tricalcium phosphate: analysis by cone-beam computed tomography
- Fig. 1. Treatment protocol for the present study. Postoperative CBCT was performed a minimum of three times, i.e., immediately, 6 months, and 2.5 years after implant placement : Long-term radiographic assessment of maxillary sin
- Fig. 2. Radiographic examination of the volume of the bone graft (BV): Calculation of area on the frontal plane prior to and immediately after surgery using polygon tool. The polygon tool is included in the CT device, which was dragged around the perimeter of the target site to measure area. Graft volume calculation method (sum of the area and calculation of volume). Volume cm3 = area cm2 × n (number of images) : Long-term radiographic assessment of maxillary sin
- Fig. 3. Radiographic examination of the height of the bone surrounding the implant (BH): Measurement of changes in the height of the implant tip to the bone fixation part over time in the frontal plane: the distance measured from the intersecting point of the long axis of the implant and the maxillary sinus floor to the implant tip: +maxillary side, −alveolar crest side. The liner valuables: residual bone height (RBH), implant length (IL), and width of sinus (SW) : Long-term radiographic assessment of maxillary sin
- Fig. 4. Clinical findings of the second surgery on biopsy at 6 months. The degree of residual grafting materials varied depending on the patient. a most of the β-TCP remained. b Replacement of the β-TCP by new bone had progressed : Long-term radiographic assessment of maxillary sin
- Fig. 5. Radiographic examination (long-term changes in bone height surrounding the implant) n = 20 Number of implants. A total of 5 CBCT scans were taken prior to surgery, immediately after surgery, 6 months after surgery, 1–2 years after surgery, and 3–5 years after surgery : Long-term radiographic assessment of maxillary sin
- Fig. 6. Radiographic examination: The relationship between changes in the maxillary sinus floor associated with a reduction in the grafted bone and the implant tip (a immediately after surgery, b 5 years after surgery) : Long-term radiographic assessment of maxillary sin