JVD 2020 #4 The Use of Biphasic Calcium Phosphate Substitute (BCP) in Mandibular Defects in Dogs: Use of CBCT to Evaluate Bone Healing; Girard Flashcards Preview

JVD 2019-2021 > JVD 2020 #4 The Use of Biphasic Calcium Phosphate Substitute (BCP) in Mandibular Defects in Dogs: Use of CBCT to Evaluate Bone Healing; Girard > Flashcards

Flashcards in JVD 2020 #4 The Use of Biphasic Calcium Phosphate Substitute (BCP) in Mandibular Defects in Dogs: Use of CBCT to Evaluate Bone Healing; Girard Deck (5)
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1
Q

What material was used for repair of the mandibular bone defects in this case series?

A

Commercially available calcium phosphate ceramic bone void filler- Graftys BCP. This ceramic is a microporous and macroporous, 2-phase calcium phosphate ceramic made of 60% hydroxyapatite (HA) and 40% beta-tricalcium phosphate (B-TCP). This was mixed with autologous blood to make a sterile coagulum.

2
Q

How were quantitative bone density measurements taken?

A

Using CBCT multi-planar reconstructions. Grey-scale values were measured on the slice images and converted to density values ( Hounsfield Units HU)

3
Q

Did the HU density values of the implanted defects equal or exceed the HU of the contralateral mandible?

A

At 3 months, all defects had HU minimal values superior to the HU minimal values of the contralateral mandible. By 2 months, all defects had HU maximal values superior to that of the contralateral MN.

4
Q

Results indicated a gradual increase in density and homogeneity of the biomaterials with time. What does this associate with?

A

Mineral density filling the spaces between ceramic granules and between the peripheral bone defect margins and the implanted biomaterial.

5
Q

When was mineralization/new bone formation obvious in all CBCT performed in this series?

A

After 8 weeks

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