| 1359 Efficacy of Implant-supported Maxillofacial Prostheses: Pre- and Post-surgical Masticatory Performances | ||
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N. GARRETT1, E.D. ROUMANAS2, K.K. KAPUR2, E. FREYMILLER2, J. BEUMER2, and R.C. MCFARLAND2, 1 UCLA School of Dentistry, Weintraub Center & VA Greater Los Angeles Healthcare System, CA, USA, 2 UCLA School of Dentistry, Weintraub Center, Los Angeles, CA, USA Objectives: Although new surgical techniques have provided improved reconstructive results following a partial mandibulectomy or maxillectomy, chewing function may continue to be compromised. Our longitudinal clinical trial to evaluate effectiveness of conventional and implant-supported dentures provided the opportunity to compare chewing function prior and subsequent to ablative and reconstructive surgery in patients receiving a partial mandibulectomy or maxillectomy. Methods: Standardized masticatory performance tests on defect and non-defect sides were given to 46 participants needing a partial mandibulectomy with free-flap reconstruction and 20 receiving a partial maxillectomy with obturation. If participants could not complete the test due to pain or discomfort in chewing, a performance score of zero was assigned. Participants also submitted to the same masticatory performance tests after surgery, prior to definitive prosthetic treatment. Results: Prior to surgery, 72% of the mandibulectomy group could not chew on the defect side and 30% could not chew on the non-defect side. The mean performance on the non-defect side of 38.9% was significantly greater (p<0.01) than the mean of 16.3% on the defect side. Post-surgically, those unable to chew increased to 89% and 36 % for the defect and non-defect sides. Decreases from entry in post-surgical performance were 16.3% (p<0.01) on the defect side, and 19.2% (p<0.01) on the non-defect side. Mean performances prior to surgery in the maxillectomy group were only 5.1% and 11.2% on the defect and non-defect sides (p=0.07,) and decreased slightly (p>0.30) post-surgically to 3.7% and 6.4% on the defect and non-defect sides. Conclusions: The considerable impairment in masticatory function seen in partial mandibulectomy and maxillectomy patients prior to ablative and reconstructive surgery becomes even greater after surgery, and is not improved by adaptation to the post-surgical condition. Supported by NIDCR Grant R01DE11255 and VA Medical Research Service. | ||
| Seq #148 - Maxillofacial Treatment, Masticatory Performance and Forces, Speech 9:00 AM-11:00 AM, Friday, 27 June 2003 Svenska Massan F1 | ||
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