LLUSD (2015) - Chapter 9 - Implant Dentistry The retentive mechanisms for overdentures are usually processed into the dentures but may be picked up intraorally using autopolymerizing resin.*TrueFalseOne study indicated that o-rings provided better retention than magnets.*TrueFalseImplant loss with overdentures is the same in the maxilla and mandible.*TrueFalseThe number of implants lost in the mandible has been greater when individual implants are used as opposed to implants that are connected together (splinted) with a bar.*TrueFalseAll studies show no difference in the amount of annual bone resorption occurring in patients who wear conventional complete dentures and patients who wear implant overdentures.*TrueFalseIn the maxilla, it is recommended that a sufficient number of implants be placed that the prosthesis can still function should an implant be lost.*TrueFalseScrew loosening and screw fractures are two of the most common complications associated with implant overdentures.*TrueFalseThe implants should be positioned so they are contained within the normal form of the denture base.*TrueFalseImplant fixed complete dentures provide better support of the facial soft tissues than is possible with an implant overdenture.*TrueFalsePatient satisfaction improves when they wear mandibular implant overdentures as opposed to conventional mandibular complete dentures.*TrueFalseThe choice of retentive mechanism should be based on the preference of the practitioner and not the retention requirements of the patient.*TrueFalseIn the maxilla, it is recommended that multiple implants be placed and that they be connected together by a bar.*TrueFalseImplant overdentues are associated with more complications than any other type of implant prosthesis.*TrueFalseImplant overdenture treatment is less costly than treatment with a fixed complete denture.*TrueFalseBars and clips are generally considered to provide better retention than o-rings and magnets.*TrueFalseImplant overdentures provide better phonetics for edentulous patients than do implant fixed complete dentures.*TrueFalseThe implants should be placed so they are parallel or nearly parallel to one another whenever possible. Neutral zone impressions are used in the maxilla to help locate the posterior teeth.*TrueFalseNeutral zone impressions are used in the maxilla to help locate the posterior teeth.*TrueFalse
