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.
Center for Advanced Oral Medicine, Kita-ku, Sapporo, Japan. kobayasi@den.hokudai.ac.jp
Kunihiko
K
Kobayashi
Takumi
T
Yorimoto
Kazuhiro
K
Hikita
Takeo
T
Maida
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