Clinical experience, misunderstood concepts and frequently asked questions. Notes from many years of practice.
The textbook answer is 32, but a meta-analysis of 125 datasets covering 87,282 individuals found at least one missing third molar in 23.07% of people. So plenty of adults have 28 to 31 teeth and no clinical problem at all. How the count changes from milk teeth to adulthood.
Across 35 studies, implant-supported single crowns reached an estimated 98.3% five-year survival for metal-ceramic, while composite veneers pooled 88%. Dentures, bridges, implant crowns and veneers compared.
Nobel Biocare is a Zurich-based implant maker grown from Branemark's research; its TiUnite surface showed 95.14% implant survival at 10 years in 106 studies.
A diastema is a visible gap between two teeth, most often the upper central incisors; common in children, it rarely closes on its own in adults.
Zirconia crowns are metal-free caps milled from zirconium dioxide; translucent 4Y-PSZ averages 803 MPa flexural strength, and no metal line shows at the gum.
Micro endodontics is root canal treatment under a dental operating microscope, finding hidden canals and root fractures; a session takes 60 to 90 minutes.
Adhesive choice shows up in the chair, not just the lab: postoperative sensitivity was more frequent with etch-and-rinse than self-etch (RR 2.12), while across five split-mouth randomised trials with 195 patients dry and wet bonding showed no significant difference in retention at any recall.
The character of the pain narrows the cause: dentin hypersensitivity, the sharp zing to cold or sweets, has a pooled prevalence of 11.5% across 77 studies, while global bruxism prevalence sits at 22.22%. Which pattern points where, and when it needs urgent care.
Behind a celebrity smile is a fairly ordinary set of materials with published numbers: a meta-analysis of 29 clinical studies gives pooled survival of 96.81 percent for lithium disilicate, 96.13 percent for feldspathic and 93.70 percent for leucite-reinforced veneers at 10.4 years. A veneer is a shell, not a crown.
