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Surgical methods of
bone replacement
Attila Szűcs DDS, PhD
Semmelweis University, Budapest
Department of Oral and Maxillofacial Surgery and Denistry
Success
for long term
(both by functional + esthetical point of view)
• excellent bone quantity
– vestibulo-oral + vertical dimension
• Good implant system
•Right treatment plan+sugical treatment
The indications of surgical
bone replacement
• After pathological bone loss
• After surgical bone loss
• Before or together with oral
implant rehabilitation
Dentistry has undergone many
changes during the past quarter
century; however, no changes have
been more profound than those
in the field of implant
dentistry
Nevins M., J. T. Mellonig edit.: Implant Therapy
Quintessence 1998.
The implant therapy
belongs to the
everyday dental practice,
because of its
predictability and high
success rate.
Present
The indication of
implant therapy can
be any of those
edentulous
situations, where
the goal is the re-
establishment of the
function and esthetics
of natural teeth
Past
The indication of
implant therapy was
determined by the
anatomic
conditions of bone.re-establishment of
the function and
esthetics of natural
teeth.
The modern surgical
methods of bone
replacement are
prominent parts of
oral surgery.
Indication
„SAC” classification
(ITI):Straightforward,Advanced and Complex
classification system (2007)
Special instruments
„Micross”
„Safescraper”
edge
collector
„Safescraper”
Bone collector
Bone mill
Piezo surgery
Micro screw
Micro saw (Khoury)
Bone splitting set
„Transfer-control”
Oteotom for bone condensation
Scaffolds /matrices//collagen, bone matrix, bone grafts/
Cells/osteoblasts,
fibroblasts/
Growth factors/BMP, PDGF, TGF-β, IGF/
Time
Biologic environment
The basic conditions of new bone formation
Scaffolds /Matrices/
Cells Growth factors
Bone replacement procedure in the
practice
Autogenous
monocortical-block
bone transplantation
Gold-standard
Autogenous bone harvested from the
iliac crest
Harvesting sites on the mandible
Monocortical bone-block-transplantation from the
iliac crest to the mandible /Op. Dr. Barabás J./
Scaffolds /Matrices/
Time
Biologic environment
The basic conditions of new bone formation
OSTEOCONDUCTION:
the use of autolog,
heterolog, or alloplastic
materials for creating a
matrix of new bone
formation
What are the relevant
characteristics of
bone grafting
materials?
Relevant characteristics of bone grafting
materials
• Chemical composition
HA synthetic
Interpore
Osprovit
Osteogen
HA natural
Bio-Oss
Ossnative
TCP
CerasorbTCP
Cerasorb
CHEMICAL COMPOSITION OF GRAFT MATERIALS
Calcium-phosphates
Calcium-carbonate
BioCoral
Bioglass ceramics Bioglass
Biogran
Polymers
Bioplant HTR
Calcium-phosphates
HA
natural
Bio-Oss
Ossnative
HA
synthetic
Interpore
Osprovit
Osteogen
HYDROXILAPATITE
(HA)
(Pentacalciumphosphate)
Ca5(PO4)3OH
Ca : P = 5 : 3
nonresorbable
TRICALCIUMPHOSPHATE
/TCP/
Ca3(PO4)2OH
Ca : P = 3 : 2
resorbable
THE MOST WIDELY USED CALCIUM-
PHOSPHATE GRAFT MATERIALS
Relevant characteristics of bone
grafting materials
• Chemical composition
• Volume of grafting
material
Bone grafting materials in 0,5 g quantities
The porosity of osteoconductive
materials
BONE 70%-80%
Bio-Oss 60%
Osteogen 60%
Interpore 16%
HTR ——
Bio-Oss bone grafting material
Osteointegration of Bio-Oss
Bone
Bio-Oss
The Bio-Oss® particles are
integrated in the newly
formed lamellar bone.
Time: min. 6 months
The matrix produced
by Bio-Oss®, facilitates
the ingrowth of blood
vessels, and the
migration of osteoblast
cells.
So develops the cell-rich
woven /reticular/ bone.
The highly porous
Bio-Oss® ceramic
stabilizes the
coagulum
The healing of bone
grafting material depends
on
• the blood supply of the
surrounding bone
The geometrical form of bone defects
5 walls 4 walls
bone graft bone graft + membrane
2-3 walls 1 wall
bone graft + fixed
membrane
bone graft + membrane +
autogenous bone
Therapy:
Therapy:
The healing of bone grafting
material depends on
• the blood supply of the surrounding bone
• surgical technique
GBR = Guided Bone Regeneration
The intensity of growth of
different tissues
connective tissue 0,5 mm/day
bone tissue 50 μm/day
Schematic
illustration of
GBR technique
Different types of
membranes
Resorbable
collagen, synthetic
Non resorbable
titanium, PTFE
BIO-GIDE® MEMBRANE
• Resorbable collagen
• Two-layers
(dense, porous)
• Slow resorption
(5-6 months)
Surgical methods with the use of
bone grafting materials
• Lateral augmentation
Implant
+
bone graft + membrane
6-7 months healing time
Immediate implantation with
bone replacement
Lateral augmentation with
simultaneous implant placement
Lateral augmentation with simultaneous
implant placement
The integration of bone graft
Lateral augmentation with simultaneous
implant placementNew bone formation, ready for implant prosthesis
Immediate implantation
after 6 months
Late implantation after bone
replacement
bone graft + membrane
6-8 month
healing
Implant placement
Lateral augmentationInsufficient bone volume for implant placement
Lateral augmentationPerforations of outer cortical layer
Lateral augmentationThe placement of bone graft and membrane
Lateral augmentationThe integration of bone graft
Lateral augmentationNewly formed bone, implant placement
Fixation of Bio-Gide membrane with
two layers
Vertical cross-section histologic picture
in the site of augmentation
bone
bone + bone graft
connective tissue + bone graft
The osteointegration
of bone grafting
materials is limited
Growth factors
Scaffolds /matrices/
The basic conditions of new bone formation
OSTEOINDUCTION
Mesenchymal
cell
Osteoblast
Osteocyte
THE TRANSFORMATION OF
OSTEOGENETIC CELLS
BMP
Bone Morphogenetic Proteins
Site of occurrence, synthesis:
- produced by the osteoblasts
- stored in the bone
Effects: influence on cell differentiation
• 13 osteoinductive BMPs have been discovered so
far
• Clinical trial with BMP-2 /rhBMP-2/.
Growth factors
Scaffolds /Matrices/
Bone replacement procedure in the
practice
Bone grafting material+GBR technique
+Autogenous bone
particles
Intraoral bone harvesting sites
Harvesting bone-blocks from the chin
Surgical methods with the use of
bone graft materials
• Lateral augmentation
• Bone-splitting, bone
spreading
Bone-splitting procedure
Insufficient bone volume for implant
placement
Bone-splitting procedureThe surgical technique of bone-splitting
Bone-splitting procedure
The placement of bone graft and membrane
Bone-splitting procedure
The osteointegration of grafting material
Bone-splitting procedure
Bone-healing, implant placement
Bone-splitting procedure
Bone-healing, implant placement
after 7 months
Surgical methods with the use of
bone graft materials
• Lateral augmentation
• Bone-splitting, bone-spreading
• Sinus-lift, sinus elevation
Sinus-lift procedure
Sinus-lift procedureCompleting lateral bone-window
Sinus-lift procedurePreparation of sinus mucosa, with hinging the
bone-window
SINUS-LIFT PROCEDUREPreparation of sinus mucosa
Sinus-lift procedurePlacement of grafting material and the
barrier membrane
Sinus-lift procedureOsteointegration of the bone grafting
material
Sinus-lift procedureNew bone formation, placement of implant
Past
The indication of
implant therapy was
determined by the
anatomic conditions
of bone.
Present
The indication of
implant therapy
can be any of those
edentulous
situations, where
the goal is the re-
establishment of the
function and
esthetics of natural
teeth
Future =
Tissue engineering