보철물 조건에 따른 Periotest수치의 실험적 평가

한중석

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보철물 조건에 따른 Periotest수치의 실험적 평가
IN VITRO EVALUATION OF PERIOTEST VALUES UNDER VARIOUS CONDITION OF PROSTHESES

The Journal of Korean Academy of Prosthodontics 1997년 35권 4호 p.793 ~ 800

한중석,

소속 상세정보

한중석 ( Han Jung-Suk ) - 이화여자대학교 의과대학 치과학교실 보철과

KMID : 0362419970350040793

Abstract

Periotest(Siemens, Germany) has been used to test mobility of the implants clinically, however the effects of target materials and connection methods on the PTVs(Periotest Values) have not been evaluated. Periotest has been regarded as a reliable and objective tool to test implant and natural teeth mobility clinically, however this instrument showed different PTVs under various test conditions. This in vitro study was designed to compare PTVs of different veneering materials and prosthodontic designs (single and bridge restorations). To compare the effects of veneering materials on PTVs, 1 mm thickness of five different testing materials (porcelain, type III gold alloy, pure titanium, composite resin, acrylic resin) were placed on the resin block. Three full length of 13 mm Mark II implant fixtures were embedded into autopolymerizing resin block to fabricate single and bridge restorations. To evaluate effects of the connection method in single restorations, PTVs of screw retained(UCLA type) and cementation type(Cera-One system) were compared. Finally, to test reliability of PTVs of the final restorations, screw retained three unit short span PFM bridges were fabricated on the standard and Estheti-Cone abutments. All testing components were tightened with torque controller and PTVs of all specimens were measured 15 times for statistical analysis with SAS program. Following conclusions were made within the limit of this in vitro study. 1. PTVs of type III gold alloy, grade II titanium, composite resin veneering materials showed no significant differences, however acrylic resin and porcelain showed significant differences (P<0.05). 2. Single tooth restorations showed consistent PTVs as long proper torque force was applied. 3. PTVs of bridge type prostheses was inconsistent regardless of abutment types. 4. PTVs fo the prostheses showed higher scores and standard deviations than those of abutments regardless types of connection (P<0.05).