title: Effect of various chemicals on the bond strength of acrylic tooth and denture base -An Invitro comparative study.
abstract: BACKGROUND
  Debonding of acrylic teeth from the denture base is a common problem. Certain clinical conditions like ridge prominence leads to excess trimming of acrylic teeth and base, resulting in a weak interface. The denture base polymer debonds adhesively in the region of the highly cross -linked matrix of the teeth. To compare the effect of different chemical surface treatments on the bond between cross-linked acrylic teeth and different types of denture base material.
  
  
  METHODS
  A total of 180 wax specimens were fabricated and divided into 3 groups: Heat-cure, high impact heat-cure, flexible denture base material bonded to acrylic teeth. Each group was further subdivided into 6 subgroups with 10 specimens each according to the surface treatment ofthe ridge lap area: control, monomer, acetone 99%, chloroform 99%, acrylic adhesive cyanoacrylate, ethyl acetate 99%. After processing, specimens were tested for bond strength using a universal testing machine. The resulting bond strengths were recorded, statistically analyzed and compared.
  
  
  RESULTS
  Among all the 3types of denture base resins, highimpact heat-cure denture base resin gave highest bond strength. There was no bonding of teeth with flexible denture base material. Chemical surface treatment of acrylic teeth with ethyl acetate gave highest bond strength followed by control, chloroform, acetone and cyanoacrylate groups.
  
  
  CONCLUSIONS
  Among all the 3types of denture base materials, high-impact heat-cure denture base resin gave highest bond strength with ethyl acetate surface treatment. Simple and quick tooth chemical surface treatment with ethylacetate could be an effective option in decreasing bonding failures and also avoid repeated denture repairs improving patient satisfaction. How to cite the article: Krishna VP, Premalatha A, Babu PJ, Raju DS, Kumar MP, Rao DB. Effect of various chemicals on the bond strength of acrylic tooth and denture base -An In-vitro comparative study. J Int Oral Health 2014;6(1):100-5.
authors.affiliation: Department of Prosthodontics, MNR Dental College, Sangareddy, Andhra Pradesh, India.
authors.forename: V Pridhvi
authors.initials: VP
authors.lastname: Krishna
authors.affiliation: Department of Prosthodontics, Dr. Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India.
authors.forename: Averneni
authors.initials: A
authors.lastname: Premalatha
authors.affiliation: Department of Prosthodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.
authors.forename: P Jithendra
authors.initials: PJ
authors.lastname: Babu
authors.affiliation: Department of Prosthodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.
authors.forename: D Srinivasa
authors.initials: DS
authors.lastname: Raju
authors.affiliation: Department of Prosthodontics, MNR Dental College, Sangareddy, Andhra Pradesh, India.
authors.forename: M Praveen
authors.initials: MP
authors.lastname: Kumar
authors.affiliation: Department of Prosthodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.
authors.forename: D Bheemalingeswara
authors.initials: DB
authors.lastname: Rao
keywords: Acrylic tooth; bond strength; denture base resin; fracture load