Laurence H Stone

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Although there is some literature which discusses adolescent reference groups, none have utilized reference group theory to examine the relative impact of the parent and peer reference groups and to attempt to predict behavior among teenagers from this knowledge. This study attempts to correct this deficiency by examining the frequency of marijuana use in a(More)
Maxillary molars exhibit variations in the canal morphology of the palatal root. Systems may occur in which a single palatal root contains two separate orifices, two separate canals, and two separate foramina. Other maxillary molars may have two separate palatal roots, each with one orifice, one canal, and one foramen. Another variation is one palatal root,(More)
Supernumerary teeth is a term that describes the presence of additional teeth beyond the normal complement. Supernumerary teeth have been reported in both the primary and permanent dentition, although they are more prevalent in the permanent dentition. Bilateral symmetrical impacted fourth molars are exceedingly uncommon, especially in combination with(More)
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