Incomplete bone formation after sinus augmentation: A case report on radiological findings by computerized tomography at follow-up.
OBJECTIVE
The aim of this case report is to present a case of incomplete bone formation after sinus augmentation.


METHODS
A patient having alveolar bone resorption of the maxillary posterior edentulous region and advanced pneumatization of the maxillary sinus was treated with sinus elevation using deproteinized bovine bone in the Department of Periodontology, Kyung Hee University School of Dentistry and re-evaluated with computed tomography (CT) follow-up.


RESULTS
Even though there were no significant findings or abnormal radiolucency on the panoramic radiograph, incomplete bone formation in the central portion of the augmented sinus was found fortuitously in the CT scan. The CT scan revealed peri-implant radiolucency in the apical portion of the implant placed in the augmented maxillary sinus. Nevertheless, the dental implants placed in the grafted sinus still functioned well at over 15 months follow-up.


CONCLUSIONS
The result of this case suggests that patients who received maxillary sinus augmentation may experience incomplete bone formation. It is possible that 1) osteoconductive graft material with poor osteogenic potential, 2) overpacking of graft material that restricts the blood supply, and 3) bone microbial contamination may cause the appearance of incomplete bone formation after sinus augmentation. Further studies are needed to elucidate the mechanism of this unexpected result and care must be taken to prevent it.
Department of Periodontology, Kyung Hee University School of Dentistry, Seoul, Korea.
Kyung-Shil
KS
Lee
Young-Hyuk
YH
Kwon
Yeek
Y
Herr
Seung-Il
SI
Shin
Ji-Yeon
JY
Lee
Jong-Hyuk
JH
Chung
J Biomed Mater Res. 2000 Mar 5;49(3):328-37
10602065
Int J Oral Maxillofac Implants. 2006 Jan-Feb;21(1):81-5
16519185
Clin Oral Implants Res. 1997 Oct;8(5):401-11
9612145
Clin Oral Implants Res. 2009 Sep;20 Suppl 4:124-33
19663959
J Periodontol. 1999 Oct;70(10):1254-9
10534082
Clin Oral Implants Res. 2001 Apr;12(2):135-43
11251663
J Periodontol. 1999 Dec;70(12):1564-73
10632532
Ann Periodontol. 2003 Dec;8(1):328-43
14971260
J Periodontol. 2004 Apr;75(4):511-6
15152813
J Periodontol. 2009 Aug;80(8):1355-64
19656037
Int J Oral Maxillofac Surg. 2005 May;34(3):273-80
15741036
J Orthop Res. 1998 Mar;16(2):155-62
9621889
Clin Oral Implants Res. 2004 Dec;15(6):716-23
15533133
Clin Oral Implants Res. 2001 Jun;12(3):279-86
11359486
J Periodontol. 2007 Oct;78(10):1872-7
18062109
Clin Oral Implants Res. 1998 Apr;9(2):107-16
9663038
Int J Oral Maxillofac Surg. 2001 Dec;30(6):531-7
11829236
Implant Dent. 2008 Sep;17(3):257-70
18784526
J Oral Surg. 1980 Aug;38(8):613-6
6993637
Int J Oral Maxillofac Implants. 1997 Mar-Apr;12(2):194-9
9109269
J Oral Maxillofac Surg. 2008 Jul;66(7):1426-38
18571027
J Clin Periodontol. 1988 Jul;15(6):383-9
3042814
Clin Oral Implants Res. 1997 Dec;8(6):476-86
9580407
Clin Oral Implants Res. 2003 Aug;14(4):481-9
12869011
Clin Oral Implants Res. 2004 Dec;15(6):733-40
15533135
J Periodontol. 1971 Apr;42(4):195-209
4928179
J Periodontol. 2005 Oct;76(10):1690-6
16253091
Int J Oral Maxillofac Implants. 1999 May-Jun;14(3):329-36
10379105
J Clin Periodontol. 2008 Sep;35(8 Suppl):216-40
18724852
Clin Oral Implants Res. 1997 Dec;8(6):487-96
9580408
J Periodontol. 1998 Aug;69(8):911-9
9736374
Clin Oral Implants Res. 2009 Oct;20(10):1078-83
19519790
Clin Oral Implants Res. 2000 Jun;11(3):217-29
11168213