Rivera is a surname of Spanish and Italian origin which was the old spelling of ribera, the Spanish word of âriverbankâ. The name Rivera is a Northern Italian variation of the Southern (Sicily) Ribera name. Other forms of spellings:Riva, Rivero, Riviere, Riba, just to name a few. Rivera is also a French surname.
The first baby teeth to fall out are typically the two bottom front teeth (lower central incisors) and the two top front teeth (upper central incisors), followed by the lateral incisors, molars and canines. Molars typically fall out between ages 9 and 12 and are replaced by permanent teeth by about age 13.
Actually, amount of teeth in a child depends on their age. Baby teeth start to fall out at about age 6 and are gradually replaced by secondary teeth until nearly age 12. A new teeth also come in throughout this time. By puberty, almost all children have 28 teeth. In all, children have 20 baby teeth â 10 on the top and 10 on the bottom. These teeth function as placeholders for the adult teeth that grow in following the baby teeth fall out.