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PP005
A CLINICAL STUDY ON IMPLANT SUCCESS AND IMPLANT SURVIVAL RATES IN ORAL CANCER PATIENTS

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A Clinical Study on Implant Success and Survival Rates in Oral Cancer Mandibulectomy Patients without Adjuvant Therapy

 

<Introduction>

1. Final goal of jaw rehabilitation: dental rehabilitation

    Dental implant: best choice for dental rehabilitation

    Fibula: good choice for mandibular reconstruction, but not enough height for dental implant treatment
    Vertical alveolar bone augmentation in fibular free flap
      - solution: superiorly fixation of fibular flap, double barrel technique, DO, onlay bone graft etc.
 
2. Onlay block bone graft
 - Ridge augmentation effect : 3~8 mm
 - Donor site: symphysis, ramus, iliac crest, scalp
 - Bone resoption rate: 23.5% ~ 42% in mandibular site (ramus)
 
3. Indication & contraindication of DO
(1) Indication
 Vertically atrophic ridge Induction
     - Ridge augmentation effect : more than 7 mm
     - Long span : more than 4 teeth
 Deficient and/or scarred soft tissue
 Sufficient bucco-lingual width of basal bone
 
(2) Contraindication
 Narrow alveolar and basal bone - less than 4 mm 
 Insufficient height of the remaining basal bone : less than 10mm
 
Purpose: This study was performed to evaluate the factors affecting on implant success and survival rate in oral cancer patients who underwent mandibulectomy without adjuvant therapy.
 
<Summary>

1. Of the 91 implants, the overall implant success rate was 85.1% and the implant survival rate was 95.4%.

2. The survival rate of the implant installed at the fibular free flap was significantly lower than installed at the natural bone (p<0.05).

3. The success rate of the implant installed at the posterior region in natural bone was significantly lower than that of the anterior region (p<0.05).

<Conclusion>

1. Reconstruction of the mandible with a fibular free flap, in combination with dental implants, leads to satisfactory functional and esthetic results.

2. Despite the limited experience, the modality of DO and onlay graft seems to be a useful method for implant placement in the reconstructed mandible using fibular free flap.

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