88. NP - new patient
89. Occlussal - the broad chewing surfaces of the posterior teeth
90. Occlusion - the manner in which the upper and lower teeth come together- bite
91. Onlay - a restoration  that is built upon the occlusal or incisal edges of the tooth- often used to restore lost tooth structure and to increase the height of a tooth. The exact definition of an onlay is a restoration which replaces one or more cusps.
92.  Oral Surgery - the dental specialty dealing with the extractions of teeth and with other surgical procedures on the jaws, oral tissues and adjacent tissues
93. Orthodontics - the dental specialty that deals with the correction of the teeth and arches through braces
94. Overjet - an overbite of the anterior teeth
95. Panoramic X-ray - a single film showing, in one view, all the teeth and surrounding structures of the mouth and jaws
96. Partial Denture - a removable appliance used to replace one or more missing teeth in the same arch
97. Pedodontics - the dental specialty dealing with the diagnosis, treatment and prevention of dental disorders in children
98. Periapical - x-rays of the tip of the root
99. Periapical Abcess - a localized collection of pus found at the tip of the root of a tooth
100. Periodontal Disease - a chronic inflammation of the gums with pus formation, bleeding; also called pyorrhea- there are 4 stages or types of perio disease
101. Periodontal Socket - a diseased area in which the gingival sulcus has become greater than 3mm in depth
102. Periodontics - the dental specialty concerned with the study, prevention and treatment of diseases in the tissues and bone supporting the teeth
103. Perioscaling - a procedure performed by either the hygienist or doctor that deep cleans under the gums to remove plaque and begin correcting the gum infection- RP&C
104. Permanent Dentition - the 32 teeth of the adult which are designed to last a lifetime
105. P&I - prep and impression
106. Pit - the area formed when two fissures cross