The autogenous or allogenous biological restorations are the two forms that can be used to restore the severely mutilated teeth. When fractured fragment or tooth is available from the same patient, it is known to be autogenous, whereas restoration using donated extracted teeth is allogenous biological restoration

Abnormalities of tooth number in the development of the dentition are quite common; however, concomitant hypo-hyperdontia is a rare mixed numeric anomalous condition, especially when it occurs in the same dental arch and a non-syndromic situation.

The chronology of tooth eruption suffers a more significant alteration in terms of onset and the first tooth/ teeth may be present at birth, called as natal teeth. Natal teeth are rare in extremely preterm infants. Riga-Fede disease occurs during early infancy and is characterized by a reactive traumatic lesion on the ventral surface of the tongue. It results due to the raking motion of the tongue over the recently erupted natal, neonatal, or primary mandibular incisors.

Odontomas are considered to be hamartomatous malformations rather than tumors. Compound odontomas are mostly found in anterior maxilla and complex odontomas are more prevalent in the posterior mandible. Although the pathology is benign, early intervention is required to avoid subsequent complications and ensure a better prognosis.

TRIPLICATION: Dental anomalies such as fusion, gemination, supernumerary teeth, and concresence are not rare. Conjoined, double,e, or triple teeth are other terms used to designate such abnormalities. The fusion of three teeth is termed a triplication defect. The prevalence of triplication in deciduous dentition has been reported to be 0.02%.
RADICULAR DENS INVAGINATUS: Dens invaginatus (DI) is a rare developmental anomaly that results from an invagination of the enamel organ into the dental papilla during odontogenesis. The invagination ranges from a slight pitting (coronal type) to an anomaly occupying most of the crown and root (radicular type). Radicular DI is an unusual dental anomaly. Although a clinical examination may reveal a deep fissure or pit on the tooth surface, a radiographic examination is the most realistic way to diagnose the invagination.