This study was designed to retrospectively analyze the long-term outcome of cases with non-grafted lateral trap-door sinus floor elevation with simultaneous implant placement 5 years post-surgery.
A total of 80 implants that were placed in 44 patients from 2004 to 2006 were included in this study. A minimum of 3-mm bone height in the alveolar ridge was required in all cases. All implants were placed simultaneously with sinus lifting procedure through a lateral approach by the trap-door, open-window method for sinus lifting without placement of any bone graft material. Preoperative, 6-month and annual postoperative panoramic radiographs and computed tomographic (CT) scans at 2-year period follow-up and a panoramic radiograph at 5-year post-operative follow-up were used to evaluate the outcome of bone height after maxillary sinus lift procedure. The gained sinus bone height in the 2-year and 5-year radiographs were evaluated and analyzed. The implant survival was defined as when the prosthesis had been delivered without infection, pain, or mobility at the 5-year follow-up.
All 80 fixtures healed uneventfully and none of the patients developed sinusitis or any complication that may have led to the loss of the implant. All implants survived up to the 5-year follow-up. The bone height gained at the expense of the sinus at 2-year follow-up did not changed significantly at the 5-year radiograph. Results of this study confirm the long-term success of non-grafted sinus floor elevation with simultaneous implant placement.

ABSTRACT . 1
CHAPTER I: Introduction… ..3
CHAPTER II: Review of Related Literature 6
2.1. Posterior Maxillary Area 7
2.2. Maxillary Sinus 7
2.3. Sinus Floor Augmentation 8
2.4. Bone Graft Materials 9
2.5. Scientific Evidences 10
CHAPTER III: Objective 12
CHAPTER IV: Patients and Methods 14
4.1. Patients and Pre-surgical Evaluation 15
4.2. Surgical Procedure 16
4.3. Prosthodontic rehabilitation 17
4.4. Analysis of Radiographs 18
CHAPTER V: Results 20
Implant rehabilitation after Sinus Lift without Bone Graft 21
CHAPTER VI: Discussion 23
CHAPTER VII: Conclusions 30
CHAPTER VIII: Tables and Figures 32
Table 1. Patient Characteristics 33
Table 2. Implant Characteristics 34
Table 3. Increases in bone height 35
Figure 1. Schematic diagram of parameters measured on radiographs 36
Figure 2. Radiographic images of Patient 1 37
Figure 3. Radiographic images of Patient 2 39
CHAPTER IX: References 42

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