title: Comparative study of alveolar bone height and implant survival rate between autogenous bone mixed with platelet rich plasma versus venous blood for maxillary sinus lift augmentation procedure.
abstract: OBJECTIVE
  The aim of this study was to evaluate changes in alveolar bone height by means of radiographic examination and Straumann implant survival rate following maxillary sinus lift augmentation using autogenous bone in combination with platelet rich plasma (PRP) versus venous blood (VB).
  
  
  METHODS
  Fifty patients requiring sinus lift augmentation procedure included in the study were divided into two groups (n = 25). During the procedure the sub antral sinus cavity was augmented using autogenous bone taken from mandibular ramus area and mixed with PRP in one group and autogenous bone mixed with VB in the other group. Orthopantomograms were taken preoperatively, immediate, at 6 months and 1 year postoperatively. Height of alveolar bone at the site of sinus augmentation was measured on the radiographs. One hundred and twenty-one Straumann dental implants were placed after healing period.
  
  
  RESULTS
  Age of the patients in the study groups ranged from 36 to 69 years. Differences in mean values of bone height measurements recorded in the PRP series revealed significant differences among the three subgroups (P = 0.001). Significant differences were noted between immediate postop and 6 month (P < 0.01), immediate postop and year (P < 0.01). In the VB series also significant differences were revealed among the three subgroups (P = 0.0280). Significant differences were noted between immediate postop and 6 month (P < 0.05). Comparison of results of subgroups of the two series at the three intervals revealed significant differences at 'immediate postop' values (P = 0.0002) and 'sixmon' values (P = 0.0435). Differences between 'year' values were not significant. Two implants were lost in PRP group.
  
  
  CONCLUSIONS
  The results of this limited study reveals that both groups recorded a good increase in the alveolar bone height after sinus augmentation and showed no significant differences between these groups when compared to each other at 1 year postoperatively. When both sub groups compared with immediate postop to year, PRP group showed significant difference and blood group showed no significant difference.
authors.affiliation: Dept of Oral and Maxillofacial Surgery and Implantology, RIMS, Prakasham dist, Ongole, 523001 Andhra Pradesh India.
authors.forename: Namineni Kiran
authors.initials: NK
authors.lastname: Kumar
authors.affiliation: Dept of Oral and Maxillofacial Surgery and Implantology, St.Joseph Dental College and Hospital, Duggirala, Eluru, 534004 Andhra Pradesh India.
authors.forename: Mahaboob
authors.initials: M
authors.lastname: Shaik
authors.affiliation: Dept of Oral and Maxillofacial Surgery and Implantology, Drs. Sudha and Nageswara Rao Siddartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, 521286 Andhra Pradesh India.
authors.forename: Koteswara Rao
authors.initials: KR
authors.lastname: Nadella
authors.affiliation: Dept of Oral and Maxillofacial Surgery and Implantology, St.Joseph Dental College and Hospital, Duggirala, Eluru, 534004 Andhra Pradesh India.
authors.forename: Balakrishna Manohar
authors.initials: BM
authors.lastname: Chintapalli
keywords: Autogenous bone; Platelet rich plasma (PRP); Sinus lift; Straumann implants; Venous blood