It is suggested that, objective outcome assessments are needed to determine the effectiveness of costly, time-consuming surgical reconstructive procedures and implant-supported dental prostheses prior to their acceptance as treatment modalities of choice for oral cancer patients. The investigators outline a longitudinal study to test three hypotheses: (1) the conventional dental prosthesis restores specified oral functions and perceptions to the pre-cancer levels; (2) the implant-supported dental prosthesis restores oral functions and oral perceptions to the pre-cancer surgery levels; and (3) the conventional denture and implant-supported prostheses are equally efficient in restoring specified oral functions and perceptions. A total of 62 patients with early oral cancer will be recruited; in addition, 22 patients requiring a partial maxillectomy and 40 requiring a partial lateral mandibulectomy will be enrolled. The mandibular defects will be reconstructed with fibula free flap surgery. Following a healing period, implants will be placed and permitted to heal unloaded for six months. Conventional dental prostheses will be fabricated and used by patients for at least 16 weeks during Phase I healing before the implants are exposed and loaded. A few weeks after Phase II surgery, the patients will receive implant-supported dental prostheses. A complete series of oral functional tests and questionnaires will be administered at four time intervals: (1) prior to ablative surgery; (2) one week before insertion of conventional denture prostheses; (3) 16 weeks after conventional dental prostheses insertion; and (4) 16 weeks after implant-supported dental prostheses insertion. All patients will be followed at 6 month intervals, for 12-36 months, to establish implant success rates, using life table analysis.

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Project (R01)
Project #
1R01DE011255-01A3
Application #
2015163
Study Section
Special Emphasis Panel (ZRG4-ORTH (01))
Project Start
1997-06-01
Project End
2002-05-31
Budget Start
1997-06-01
Budget End
1998-05-31
Support Year
1
Fiscal Year
1997
Total Cost
Indirect Cost
Name
University of California Los Angeles
Department
Dentistry
Type
Schools of Dentistry
DUNS #
119132785
City
Los Angeles
State
CA
Country
United States
Zip Code
90095
Fueki, Kenji; Roumanas, Eleni D; Blackwell, Keith E et al. (2014) Effect of implant support for prostheses on electromyographic activity of masseter muscle and jaw movement in patients after mandibular fibula free flap reconstruction. Int J Oral Maxillofac Implants 29:162-70
Garrett, Neal; Roumanas, Eleni D; Blackwell, Keith E et al. (2006) Efficacy of conventional and implant-supported mandibular resection prostheses: study overview and treatment outcomes. J Prosthet Dent 96:13-24
Roumanas, Eleni D; Garrett, Neal; Blackwell, Keith E et al. (2006) Masticatory and swallowing threshold performances with conventional and implant-supported prostheses after mandibular fibula free-flap reconstruction. J Prosthet Dent 96:289-97