Bone formation without lamina dura in the middle-aged and elderly: possible dependence on enamel.
Bone formation below the crown of mandibular horizontal incompletely impacted third molar is frequently seen in the middle-aged and elderly. The phenomenon shows lamina dura loss without radiolucency and we hypothesized the participation of mature enamel without any influence on the environmental oral status. In order to investigate the characteristics of the phenomenon based on the presence/absence of the lamina dura and radiolucency below the crown, we studied the relationship between 58 men and 43 women with a lamina dura without radiolucency, 12 men and 8 women without a lamina dura with radiolucency, 34 men and 16 women without a lamina dura without radiolucency, and the status of teeth in the ipsilateral mandible. Subjects without a lamina dura without radiolucency were significantly older than those with a lamina dura without radiolucency in both men (P < 0.0001) and women (P <0.01), indicating different chronological causes. Men without lamina dura with radiolucency showed significantly more tooth loss than those with a lamina dura without radiolucency (P < 0.00001) and those without a lamina dura without radiolucency (P < 0.0001), indicating the influence of poor oral health. Thus, the phenomenon without a lamina dura without radiolucency may show the clinical importance of bone formation in the elderly.
Yamaoka
Minoru
M
Matsumoto Dental University, Oral and Maxillofacial Surgery, Shiojiri, Nagano, Japan. yamaoka@po.mdu.ac.jp <yamaoka@po.mdu.ac.jp>
Ishizuka
Masahide
M
Ishihama
Kohji
K
Takahashi
Masahiro
M
Takahashi
Miho
M
Yamada
Hidefumi
H
Teramoto
Yuji
Y
Yasuda
Kouichi
K
Shiba
Toshikazu
T
Uematsu
Takashi
T
Furusawa
Kiyofumi
K
D000328:Adult; D003743:Dental Enamel; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008334:Mandible; D008875:Middle Aged; D008964:Molar, Third / Q000000981:diagnostic imaging / Q000503:physiopathology; D010012:Osteogenesis / Q000502:physiology*; D011862:Radiography, Panoramic; D020390:Tooth Socket / Q000503:physiopathology*; D014095:Tooth, Impacted / Q000000981:diagnostic imaging / Q000503:physiopathology
Gene. 1996 Dec 12;183(1-2):123-8
8996096
Connect Tissue Res. 1998;39(1-3):101-9; discussion 141-9
11062992
J Dent Res. 2009 Sep;88(9):823-8
19767579
Z Zellforsch Mikrosk Anat. 1972;131(1):63-75
5073642
Arch Oral Biol. 1995 Jul;40(7):677-80
7575241
J Am Dent Assoc. 1979 Sep;99(3):460-4
288779
Biochem J. 1988 Dec 15;256(3):965-72
3223966
N Engl J Med. 2009 Jan 1;360(1):80-2
19118309
FASEB J. 1996 Apr;10(5):587-97
8621058
Arch Oral Biol. 1975 Feb;20(2):137-8
47241
Swed Dent J. 2009;33(3):131-9
19994563
J Biol Chem. 1996 Feb 23;271(8):4431-5
8626794
Anat Rec. 1996 Jun;245(2):186-207
8769663
Connect Tissue Res. 2002;43(2-3):441-9
12489196
Arch Oral Biol. 1995 Jan;40(1):1-14
7748107
Clin Cosmet Investig Dent. 2010 Jan 05;2:1-3
23671397
Biol Chem. 2008 Jun;389(6):695-700
18627287
J Oral Maxillofac Surg. 2009 Mar;67(3):491-500
19231771
FASEB J. 1995 Oct;9(13):1277-87
7557017
Community Dent Oral Epidemiol. 1997 Dec;25(6):429-37
9429816
Adv Dent Res. 1987 Dec;1(2):148-61
3504166
Clin Interv Aging. 2009;4:451-6
19966914
J Bone Miner Res. 1996 Jul;11(7):883-91
8797107
Anat Rec. 1977 Jan;187(1):63-98
835843