“In implant surgery, biology is constant — but humans are variable.” andré chen This week brought an interesting clinical reflection. I was waiting for the local supermarket Aucham to open this morning here in Benfica neighborhood,,, when I started thinking about a case we performed this week: a sinus elevation in the region of tooth #16. The CBCT clearly showed a severely pneumatized maxillary sinus and almost no residual bone. The patient, interestingly, had no idea this wa