As with people, puppies lose their baby teeth, or deciduous teeth, and develop adult teeth. By 1 month of age, puppies generally start erupting their baby teeth that's when the teeth begin to break through the gums and have all 28 deciduous teeth by the time they reach 1 ½ months of age. By the time a puppy is 6 to 7 months of age, generally all the baby teeth have been replaced with 42 adult or permanent teeth.
The body begins a process of resorption of the baby teeth as soon as the permanent teeth begin their formation. This process causes the teeth to loosen and fall out as the permanent teeth erupt. Occasionally, the normal resorption process fails, and the deciduous teeth do not fall out. This is commonly referred to as retained deciduous teeth. This situation leads to problems as two teeth try to occupy the same area causing the new permanent tooth to erupt at an abnormal angle or in an abnormal position. This can result in malocclusion or an abnormal bite. We seem to be seeing this more in our Biewer's.
The four canine teeth are most commonly retained. These two sets of canine teeth one mandibular set on the lower jaw and one maxillary set on the upper jaw are the sharp fang-like teeth that are just behind the front 6 central incisors.
