Computer Generated Reconstruction with preformed Titanium membranes

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Titanium Membranesfor Reconstruction of Defects

dr. Vrielinck Lucdr. C. Politis, dr. S. Schepers

Department of Oral and Maxillofacial SurgeryZOL Campus St. Jan — Genk - Belgium

11/03/02

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• Type of Bone Defects• Titanium Membranes• Treatment Protocol• Clinical Examples• Results• Conclusions

Overview

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Type of Bone Defects

Results ConclusionsClinical Examples

Treatment ProtocolTitanium Membranes

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• Pure bone defects - Congenital • Cleft palate


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• Pure bone defects - Congenital • Cleft palate • Treacher Collins syndrome • Hemifacial microsomy


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• Pure bone defects - Congenital - Posttraumatic • zygomatic buttress


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• Pure bone defects - Congenital - Posttraumatic • zygomatic buttress • orbital floor


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• Pure bone defects - Congenital - Posttraumatic • zygomatic buttress • orbital floor • nasoethmoid region


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• Pure bone defects - Congenital - Posttraumatic - Postoperative • maxilla


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• Pure bone defects - Congenital - Posttraumatic - Postoperative • maxilla • mandible


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• Pure bone defects - Congenital - Posttraumatic - Postoperative • maxilla • mandible • iliac crest


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• Pure bone defects - Congenital - Posttraumatic - Postoperative • maxilla • mandible • iliac crest • skull defect after trepanantion Courtesy of Jan Haex, Maastricht


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• Pure bone defects - Congenital - Posttraumatic - Postoperative - Terminal jaw atrophy


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• Pure bone defects• Bone + soft tissue defects


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Treatment Protocol

Type of Bone Defects Titanium Membranes

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Titanium Membranes• Hydroforming• Casting

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Titanium Membranes• Hydroforming - using thin titanium foils (0.2 - 0.4 mm)

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Titanium Membranes• Hydroforming - using thin titanium foils (0.2 - 0.4 mm) - ‘cold’ deformation under pressure (600 bar)

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Titanium Membranes• Hydroforming - using thin titanium foils (0.2 - 0.4 mm) - ‘cold’ deformation under pressure (600 bar) - foil is moulded around a positive cast

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Titanium Membranes• Hydroforming - using thin titanium foils (0.2 - 0.4 mm) - ‘cold’ deformation under pressure (600 bar) - foil is moulded around a positive cast - lateral expansion is limited by tear formation

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Titanium Membranes• Hydroforming - using thin titanium foils (0.2 - 0.4 mm) - ‘cold’ deformation under pressure (600 bar) - foil is moulded around a positive cast - lateral expansion is limited by tear formation - lateral compression induces folds

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Titanium Membranes• Hydroforming - using thin titanium foils (0.2 - 0.4 mm) - ‘cold’ deformation under pressure (600 bar) - foil is moulded around a positive cast - lateral expansion is limited by tear formation - lateral compression induces folds - industrial fabrication

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Titanium Membranes• Hydroforming• Casting - fabricated in dental laboratory

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Titanium Membranes• Hydroforming• Casting - fabricated in dental laboratory - used for complex 3D anatomic forms

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Titanium Membranes• Hydroforming• Casting - fabricated in dental laboratory - used for complex 3D anatomic forms - fabricated using lost wax technique

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Titanium Membranes• Hydroforming• Casting - fabricated in dental laboratory - used for complex 3D anatomic forms - fabricated using lost wax technique - massive titanium structures

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Titanium Membranes• Hydroforming• Casting - fabricated in dental laboratory - used for complex 3D anatomic forms - fabricated using lost wax technique - massive titanium structures - hollowed out structures

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Type of Bone Defects Treatment ProtocolTitanium Membranes

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• CT Scan• 3D Stereolithography & Membrane Design• Membrane Fabrication• Surgery

Treatment Protocol

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Treatment ProtocolCT Scan

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• Scan of the jaws (e.g. spiral tomography) - gantry tilt 0°

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• Scan of the jaws (e.g. spiral tomography) - gantry tilt 0° - slice thickness of max 1.0 mm

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• Scan of the jaws (e.g. spiral tomography) - gantry tilt 0° - slice thickness of max 1.0 mm• Transfer of data to PC (Mimics)

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• Scan of the jaws (e.g. spiral tomography) - gantry tilt 0° - slice thickness of max 1.0 mm• Transfer of data to PC (Mimics)• Calculation 3D model on PC

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Treatment Protocol

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Treatment Protocol3D STL & Membrane Design

• Fabrication Physical Stereolithography model (Materialise)

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• Fabrication Physical STL model - original image

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• Fabrication Physical STL model - original image - mirror image

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• Fabrication Physical STL model - original image - mirror image• Design of the Membrane

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Treatment Protocol

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Treatment ProtocolMembrane Fabrication

• initial procedures in the dental laboratory

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• initial procedures in the dental laboratory• hydrofoil technique: positive cast needed

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• initial procedures in the dental laboratory• hydrofoil technique: positive cast needed• casting technique: lost wax technique

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• initial procedures in the dental laboratory• hydrofoil technique: positive cast needed• casting technique: lost wax technique• finishing the membrane

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Treatment Protocol

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Treatment ProtocolSurgery

• membrane sterilised by autoclaving

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• membrane sterilised by autoclaving• general or local anesthesia

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• membrane sterilised by autoclaving• general or local anesthesia• incision and careful deperiostation

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• membrane sterilised by autoclaving• general or local anesthesia• incision and careful deperiostation• positioning the plate on top of the bone

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• membrane sterilised by autoclaving• general or local anesthesia• incision and careful deperiostation• positioning the plate• fixation and immobilisation of the plate by osteosynthesis screws

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Results Conclusions


Clinical Examples


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• Asymmetry and enoftalmy• Mandibulectomy reconstruction• Reconstruction iliac crest• Soft tissue reconstruction• Reconstruction nasoethmoid region

Clinical Examples

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• Asymmetry and enoftalmy

Clinical Examples

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Clinical Examples

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• Mandibulectomy reconstruction

Clinical Examples

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Clinical Examples

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• Reconstruction iliac crest

Clinical Examples

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Clinical Examples

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• Soft tissue reconstruction

Clinical Examples

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Clinical Examples

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• Reconstruction nasoethmoid region

Clinical Examples

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Conclusions


Clinical Examples

Treatment Protocol

Results

Titanium Membranes

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Treated Indications• facial asymmetry 3

Clinical Examples

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Treated Indications• facial asymmetry 3• maxillary defect 1

Clinical Examples

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Treated Indications• facial asymmetry 3• maxillary defect 1• mandibular reconstruction 2

Clinical Examples

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Treated Indications• facial asymmetry 3• maxillary defect 1• mandibular reconstruction 2• soft tissue reconstruction 1

Clinical Examples

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Treated Indications• facial asymmetry 3• maxillary defect 1• mandibular reconstruction 2• soft tissue reconstruction 1• nasoethmoid reconstruction 1

Clinical Examples

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Advantages of Titanium Membranes• excellent esthetic result

Clinical Examples

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Advantages of Titanium Membranes• excellent esthetic result• no donor site morbidity

Clinical Examples

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Advantages of Titanium Membranes• excellent esthetic result• no donor site morbidity• simple operation technique

Clinical Examples

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Advantages of Titanium Membranes• excellent esthetic result• no donor site morbidity• simple operation technique• reduced operation time

Clinical Examples

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Advantages of Titanium Membranes• excellent esthetic result• no donor site morbidity• simple operation technique• reduced operation time• reduced hospitalisation

Clinical Examples

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Advantages of Titanium Membranes• excellent esthetic result• no donor site morbidity• simple operation technique• reduced operation time• reduced hospitalisation• possible bone regeneration under the membrane (?)

Clinical Examples

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Clinical Examples Conclusions

Treatment Protocol

Results

Titanium Membranes

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ConclusionsWhy use titanium membranes ?

• Alternative for bone reconstruction

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• Alternative for bone reconstruction• Can bear functional load

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• Alternative for bone reconstruction• Can bear functional load• Very good for correction of bone asymmetries

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• Alternative for bone reconstruction• Can bear functional load• Very good for correction of bone asymmetries• Reduced operation time and morbidity


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Computer Generated Reconstruction with preformed Titanium membranes

Documents

vrielinck lucdr

titanium foils

cold deformation

bar foil

positive cast1dr

tear formation1dr

trepanantion courtesy

schepersdepartment of