<prompt> Which of the following is not always a true odontogenic infectionPeriapical abscessPeriodontal abscessMaxillary sinusitisNone of the above  <response>: Orofacial infections may be odontogenic or non-odontogenic in nature. Majory of odontogenic infections are caused by the endogenous bacteria present in the oral cavity. Eg: Periapical and periodontal infections. Most of non-odontogenic infections are associated with an underlying medical condition Eg: Non-odontogenic infections of the skin, tonsils, or maxillary sinuses. Occasionally, infections could develop following an anesthetic injection or a surgical procedure. 