Bone Augmentation with Titanium mesh

tan soon teik

Author
Dr. Tan Soon Teik




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- CLASS 1 SKELETAL WITH ENOUGH LIP SUPPORT WITH FLANGELESS DENTURE
- MODERATE GINGIVA BIOTYPE THICKNESS
- MODERATE GINGIVA DISPLAY
- SQUARISH EXISTING DENTURE TEETH (TO CONFORM TO THE EXISTING MOULD OF TOOTH SHAPE)
- HORIZONTAL RIDGE RESORPTION IN GENERAL WITH VERTICAL LOSS AT 22 REGION
- ADJACENT INTERPROXIMAL CRESTAL BONE HEIGHT REASONABLE. NO PERIO POCKETING
- 2 STAGE SURGICAL APPROACH
- HORIZONTAL AND VERTICAL AUGMENTATION WITH TI MESH USING ALLOGENIC PARTICULATE GRAFT
- 2 IMPLANTS TO BE PLACED FOR SCREW RETAINED FIXED BRIDGE
- PROVISIONAL BRIDGE FOR CREATING EMERGENCE PROFILE
- FINAL RESTORATION
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THIN CRESTAL RIDGE WITH APICAL CONCAVITY

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MARROW PENETRATION AND ADAPTATION WITH TRIMMING OF TITANIUM MESH

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ALLOGENIC PARTICULATE GRAFT PLACED. PERIOSTEAL SPLITTING DONE FOR TENSION FREE PRIMARY CLOSURE.

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TENSION FREE PRIMARY CLOSURE WITH DOUBLE SLING SUTURE, HORIZONTAL MATTRESS SUTURE AND SIMPLE INTERRUPTED SUTURE

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3 MONTHS REVIEW: SOFT TISSUE THINNING ON THE RIGHT QUADRANT & VERTICAL HEIGHT ON THE LEFT SIDE SUFFICIENT

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MONTH 5: DEHISCENCE OF SOFT TISSUE. DECISION MADE TO REMOVE TI MESH AND PLACE IMPLANTS

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TI MESH EXPOSED, THIN PSEUDO-PERIOSTEUM COVERING NEWLY REGENERATED BONE PRESENT UNDER TI MESH

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IMPLANT OSTEOTOMY WITH THE HELP OF SURGICAL GUIDE AND PARALLEL PINS

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RIDGE WIDTH AT CRESTAL STILL SLIGHTLY INSUFFICIENT

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INSERTION TORQUE RIGHT VS LEFT ARE 30NCM AND 25 NCM RESPECTIVELY

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ADDITIONAL GBR WAS PLANNED AND TO COVER DEHISENCE SITE WITH COLLAGEN MEMBRANE. PERIOSTEAL INCISION WAS MADE.

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GBR PERFORMED WITH COLLAGEN MEMBRANE AND PARTICULATE ALLOGENIC GRAFT (REGENOSS)

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TENSION FREE PRIMARY CLOSURE DONE

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TWO WEEKS REVIEW AFTER IMPLANT PLACEMENT AND GBR

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ONE MONTH REVIEW AFTER IMPLANT PLACEMENT AND GBR

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HEALING AFTER 10 WEEKS

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HEALING ABUTMENT PLACEMENT

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3 WEEKS AFTER HEALING ABUTMENTS PLACED

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IMPRESSION TO FABRICATE PROVISIONAL BRIDGE

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PRIOR PROVISIONAL PLACEMENT THICK SOFT TISSUE LABIAL TO IMPLANTS

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SCREW RETAINED PROVISIONAL BRIDGE TO FORM SOFT TISSUE EMERGENCE PROFILE TO TAKE FINAL IMPRESSION IN 2 TO 3 MONTHS AFTER SOFT TISSUE ACHIEVES PLEASING EMERGENCE PROFILE

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- UNDOUBTEDLY, TI MESH CAN PREDICTABLY AUGMENT RIDGE BOTH VERTICALLY AND HORIZONTALLY.
- BUT THIS METHOD HAS HIGH SOFT TISSUE COMPLICATION (22.78%), MEANING ALMOST 1 OUT OF 5 CASES WILL ENCOUNTER DEHISCENCE.
- IT WAS REPORTED THAT TI MESH EXPOSURE IS PROBABLY ATTRIBUTABLE TO ITS LOW FLEXIBILITY (WATZINGER et al 2000) OR THE SUTURING TECHNIQUE USED (PINHO et al 2006).
- RAKHMATIA et al 2014 DID A MICROCOMPUTED TOMOGRAPHY & HISTOMORPHOMETRIC ANALYSIS ON DIFFERENT TITANIUM MEMBRANES WITH DIFFRENET THICKNESS AND PORE SIZES IN RAT CALVARIAL DEFECT MODEL.
- THE GREATEST BONE VOLUME GAIN WAS NOTICED ON 100 MICRON THICK MEMBRANES WITH LARGE PORES, BUT WITH LOWER MINERAL DENSITY
- SOFT TISSUE INGROWTH ON THAT GROUP WAS INCREASED AT 4 WEEKS BUT DECREASED BY 8 WEEKS TO A LEVEL NOT STATISTICALLY SIGNIFICANT TO OTHER TI MEMBRANE GROUPS
- THEY CONCLUDED THAT TI MESH THICKNESS AFFECT THE BONE VOLUME GAINED AND THE MESH POROSITY PLAYED AN ESSENTIAL PART IN BONE REGENERATION ESPECIALLY AT THE INITIAL HEALING PERIOD AS VASCULARITY OF THE SOFT TISSUE WAS NOT DISTURBED.
- TORRES et al 2010 DID A HUMAN RANDOMIZED CONTROLLED TRIAL TO EVALUATE THE USE OF PLATELET-RICH-PLASMA (PRP) AS A METHOD TO PREVENT TI MESH EXPOSURE IN ALVEOLAR RIDGE AUGMENTATION WITH ANORGANIC BOVINE BONE.
- THEY FOUND THAT THE CONTROL GROUP WITHOUT PRP SUFFERED 28.5% OF MESH EXPOSURE WHEREAS NO EXPOSURE WAS FOUND IN THE PRP GROUP (STATISTICALLY SIGNIFICANT).
- RADIOGRAPHIC ANALYSIS ALSO SHOWED HIGHER BONE GAIN IN THE PRP GROUP. THEY CONCLUDED THAT DUE TO THE IMPROVE SOFT TISSUE HEALING CAPACITY BY PRP, THE MESH AND GRAFT MATERIAL WERE PROTECTED UNDER THE SOFT TISSUE WITHOUT ANY DEHISCENCE.
- TI MESH EXPOSURE PROVOKED SIGNIFICANT BONE LOSS BUT IN MOST CASES DID NOT AFFECT THE SUBSEQUENT PLACEMENT OF IMPLANTS
- ADDITIONAL GROWTH FACTOR TO PREVENT SOFT TISSUE COMPLICATION
- MORE RANDOMIZED CONTROLLED TRIALS TO DETERMINE THE IDEAL THICKNESS AND POROSITY OF TITANIUM MESH TO MINIMIZE THE THICKNESS OF PSEUDO-PERIOSTEUM FORMED UNDERNEATH THE MESH
- IMPROVEMENT IN THE MESH MATERIAL FOR BETTER ADAPTATION AND MANIPULATION
- BETTER SURGICAL PROTOCOL - 3D PRINTED MESH OR PRE-SURGICAL ADAPTATION ON STEREOLYTHIC MODEL
- IMPROVE SURGICAL INSTRUMENT TO EASE SOFT TISSUE MANIPULATION
- BETTER TENSION FREE CLOSURE AND SUTURING TECHNIQUE
- TITANIUM MESH AUGMENTATION IS PREDICTABLE TO GAIN BOTH HORIZONTAL AND VERTICAL BONE DIMENSION
- SOFT TISSUE IS THE ISSUE

UNDOUBTEDLY, TI MESH CAN PREDICTABLY AUGMENT RIDGE BOTH VERTICALLY AND HORIZONTALLY. BUT THIS METHOD HAS HIGH SOFT TISSUE COMPLICATION (22.78%), MEANING ALMOST 1 OUT OF 5 CASES WILL ENCOUNTER DEHISCENCE. IT WAS REPORTED THAT TI MESH EXPOSURE IS PROBABLY ATTRIBUTABLE TO ITS LOW FLEXIBILITY (WATZINGER et al 2000) OR THE SUTURING TECHNIQUE USED (PINHO et al 2006).
RAKHMATIA et al 2014 DID A MICROCOMPUTED TOMOGRAPHY & HISTOMORPHOMETRIC ANALYSIS ON DIFFERENT TITANIUM MEMBRANES WITH DIFFRENET THICKNESS AND PORE SIZES IN RAT CALVARIAL DEFECT MODEL. THE GREATEST BONE VOLUME GAIN WAS NOTICED ON 100 MICRON THICK MEMBRANES WITH LARGE PORES, BUT WITH LOWER MINERAL DENSITY

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