PMID- 16958697
OWN - NLM
STAT- MEDLINE
DCOM- 20061201
LR  - 20161124
IS  - 0905-7161 (Print)
IS  - 0905-7161 (Linking)
VI  - 17
IP  - 5
DP  - 2006 Oct
TI  - Comparison of hard tissue density changes around implants assessed in digitized 
      conventional radiographs and subtraction images.
PG  - 560-4
AB  - OBJECTIVES: The aim of this in vivo study was to compare peri-implant bone 
      density assessed by the mean gray value of the histogram in digitized 
      conventional radiographs and two digital subtraction images (DSI) methods: linear 
      and logarithmic. MATERIAL AND METHODS: Thirty-four patients were monitored by 
      standardized periapical radiographs 1 week after surgery and 4 months later. The 
      radiographs were digitized and manipulated by means of EMAGO software. Linear and 
      logarithmic DSI were obtained, and a filter was added to the logarithmic image. 
      Control and test regions were selected and the mean value of the gray level of 
      the histogram of these selected areas was obtained. This process was carried out 
      in the digitized conventional radiographs (DCR) and the two methods of DSI. After 
      that, the images were divided into two groups, with and without bone loss, and 
      statistical analysis was performed. RESULTS: The results indicate that 
      differences between the jaws did not reach significance, in all the images and in 
      the two groups with and without bone loss. Furthermore, there was no 
      statistically significant difference between the radiographic density assessed in 
      the DCR and the two methods of subtraction images. CONCLUSIONS: Monitoring of 
      peri-implant bone density by the mean gray value of the histogram in a selected 
      area can be assessed either by linear and logarithmic DSI or by DCR.
FAU - Bittar-Cortez, Juliana Araujo
AU  - Bittar-Cortez JA
AD  - Division of Oral Radiology, Piracicaba Dental School, State University of 
      Campinas, Limeira Avenue 901, Bairro Areiao, Piracicaba 13.414-903, Sao Paulo, 
      Brazil.
FAU - Passeri, Luis Augusto
AU  - Passeri LA
FAU - Boscolo, Frab Norberto
AU  - Boscolo FN
FAU - Haiter-Neto, Francisco
AU  - Haiter-Neto F
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - Denmark
TA  - Clin Oral Implants Res
JT  - Clinical oral implants research
JID - 9105713
RN  - 0 (Dental Implants)
MH  - Alveolar Bone Loss/diagnostic imaging
MH  - Bone Density/*physiology
MH  - *Dental Implants
MH  - Follow-Up Studies
MH  - Humans
MH  - Image Processing, Computer-Assisted
MH  - Mandible/*diagnostic imaging/surgery
MH  - Maxilla/*diagnostic imaging/surgery
MH  - Periapical Tissue/diagnostic imaging
MH  - *Radiographic Image Enhancement
MH  - *Subtraction Technique
EDAT- 2006/09/09 09:00
MHDA- 2006/12/09 09:00
CRDT- 2006/09/09 09:00
PHST- 2006/09/09 09:00 [pubmed]
PHST- 2006/12/09 09:00 [medline]
PHST- 2006/09/09 09:00 [entrez]
AID - CLR1256 [pii]
AID - 10.1111/j.1600-0501.2006.01256.x [doi]
PST - ppublish
SO  - Clin Oral Implants Res. 2006 Oct;17(5):560-4. doi: 
      10.1111/j.1600-0501.2006.01256.x.