Open hour: senin - sabtu 09:00:00 - 20:00:00; minggu & tanggal merah tutup
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 [1]

author: Tsuneji Okada, Toru Kanai, Noriko Tachikawa, Motohiro Munakata, Shohei Kasugai | publisher: drg. Andreas Tjandra, Sp. Perio, FISID

The mean age of the 30 patients was 57.4 (40–75) years, and the male/female ratio was 4:26. The mean postoperative observation period was 3 years and 8 months (the maximum period was 5 years and 0 months; the minimum period was 2 years and 2 months). Total of 58 implants were placed at premolar and molar region. There were no dropouts, such as participants not visiting the clinic, during the observation period (Tables 1, 2, and 3).

Implant osseointegration was achieved in all patients without any complications. During the observation period between January 2009 and January 2014, the implant survival rate was 100 %. At the time of second-stage surgery, macroscopic observation of the lateral wall of the maxillary sinus revealed differing degrees of β-TCP replaced by new bone (Fig. 4).

In consideration of the radiation the patient would be exposed to and to increase the benefits to the patients, the fourth CBCT (2.5 years after surgery) was performed at a time when it did not overlap with radiation exposure that was conducted as part of complete physical examinations or required tests (periodontal disease of the remaining tooth, endodontic examinations, root fracture, etc.). Therefore, the fourth CBCT was performed at varying times. The distribution of observation time is shown in Table 4.

β-TCP could be differentiated from existing bone on CBCT even 6 months after surgery; however, the distinction became unclear 2.5 years after surgery, indicating that the replacement of the grafted bone by new bone appeared to have been accelerated. The effect of implant artifacts made it difficult to measure changes in the bone density index (gray scale value).

Volumetric changes in the graft: The mean β-TCP volume decreased from immediately after surgery (1206.9 ± 437 cm3) to 6 months after surgery (912.6 ± 356 cm3). It further decreased 2.5 years after surgery (662 ± 294 cm3), and the reduction in volume was observed in all patients. Percent volume changes 6 months after surgery and 2.5 years after surgery using volume immediately after surgery as the baseline value were 75.6 and 54.9 %, respectively (Table 5).

Serial posts:


id post:
New thoughts
Me:
search
glossary
en in