LLUSD - Chapter 9 - Implant Dentistry The retentive mechanisms for overdentures are usually processed into the dentures but may be picked up intraorally using autopolymerizing resin.*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.*TrueFalseThe choice of retentive mechanism should be based on the preference of the practitioner and not the retention requirements of the patient.*TrueFalsePatient satisfaction improves when they wear mandibular implant overdentures as opposed to conventional mandibular complete dentures.*TrueFalseImplant overdenture treatment is less costly than treatment with a fixed complete denture.*TrueFalseImplant loss with overdentures is the same in the maxilla and mandible.*TrueFalseIn the maxilla, it is recommended that multiple implants be placed and that they be connected together by a bar.*TrueFalseOne study indicated that o-rings provided better retention than magnets.*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.*TrueFalseImplant overdentues are associated with more complications than any other type of implant prosthesis.*TrueFalseThe implants should be positioned so they are contained within the normal form of the denture base.*TrueFalseNeutral zone impressions are used in the maxilla to help locate the posterior teeth.*TrueFalseBars and clips are generally considered to provide better retention than o-rings and magnets.*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.*TrueFalseImplant overdentures provide better phonetics for edentulous patients than do implant fixed complete dentures.*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.*TrueFalseImplant fixed complete dentures provide better support of the facial soft tissues than is possible with an implant overdenture.*TrueFalse
