Bone grafting before implants: when augmentation beats placing anyway

Placing an implant without enough bone is the most common avoidable mistake in UAE implantology. Here is when a graft saves the case — and when it is overkill.

A patient comes in with a panoramic radiograph showing a single missing upper first molar. He has been told he needs a sinus lift and bone graft before an implant can be placed, then an eight-month wait, then surgery, then the crown. The total quote is AED 22,000 and a year of his life. He has also been told, by another clinic, that they can just "put a longer implant in straight away" for AED 9,000. He wants to know which is true. Both are technically possible. Only one is biologically honest for his specific anatomy. Here is how that decision actually gets made at the chair. The minimum bone an implant needs The current ITI Consensus benchmarks are clear: an implant needs at least 1 mm of bone circumferentially around its body and 2 mm of bone apical to the apex to be biologically stable long-term. In the posterior maxilla, where the sinus floor sits low and the residual ridge resorbs after extraction, those millimetres can disappear quickly. Buser and colleagues ( Clin Oral Implants Res , 2013) demonstrated that implants placed with bone dehiscences greater than 2 mm have a measurably higher peri-implantitis incidence over 10 years. Placing a longer implant into bone that does not support it does not change the geometry — it just engages the sinus floor, which then becomes the failure point. Bone height and ridge width on the CBCT decide whether you augment, alter the angle, or change the implant system entirely. When a graft is necessary A graft is necessary when the residual ridge dimension prevents an implant of adequate length and diameter from being placed without dehiscing the buccal plate or perforating the sinus floor. Three specific scenarios come up repeatedly in our Sharjah practice. First, a posterior maxilla with less than 5 mm of bone below the sinus floor — a transcrestal or lateral window sinus lift, often with Bio-Oss as the graft material, restores the volume. Second, a narrow knife-edge anterior ridge — a guided bone regeneration procedure with autologous bone chips and a resorbable membrane gives us the width we need. Third, an extraction socket with buccal plate loss — immediate ridge preservation at the time of extraction prevents the resorption that would otherwise force a bigger augmentation six months later. When a graft is overkill There are three situations in which I do not graft and instead change the plan. A mandibular poste…

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