Abutment forms and restorative materials in adhesive prosthesis: a finite element analysis.
This study evaluated experimental abutment forms utilizing adhesion for clinical treatment by the three-dimensional finite element method. Three experimental abutment forms with no axial wall were evaluated: Form 1 was the occlusal surface reduced by 1.5 mm, Forms 2 and 3 were the crown cut perpendicular to the tooth axis 2 mm or 4 mm from the central groove. The restorations were made of 3 types of materials: composite resin, porcelain, and a gold-based alloy. Restorations were bonded to the abutments with an adhesive resin. A vertical load of 500 N was applied to the center of the inner incline of the buccal cusp. The stresses in the adhesives were largest in Form 1 with composite resin and in Form 3. It was indicated that the stresses were greatly affected by the form of the abutment and the restorative materials.
Kobayashi
Kunihiko
K
Center for Advanced Oral Medicine, Kita-ku, Sapporo, Japan. kobayasi@den.hokudai.ac.jp
Yorimoto
Takumi
T
Hikita
Kazuhiro
K
Maida
Takeo
T
D001641:Bicuspid; D001732:Bite Force; D002484:Cementation; D003188:Composite Resins; D003442:Crowns; D000044:Dental Abutments; D003776:Dental Porcelain; D003799:Dental Stress Analysis / Q000379:methods*; D004548:Elasticity; D020342:Finite Element Analysis; D006047:Gold Alloys; D006801:Humans; D008422:Materials Testing; D019279:Resin Cements; D019231:Tooth Preparation, Prosthodontic / Q000379:methods*
D003188:Composite Resins; D006047:Gold Alloys; D019279:Resin Cements; D003776:Dental Porcelain