RESUMO
BACKGROUND: A biological seal that protects the implant from any biological or external impingement is created by the supracrestal attached tissues. Sohn's poncho technique is a technique that utilizes a healing abutment at the implant site to stabilize the platelet rich fibrin (PRF) membrane. Thus, the aim of this study is to evaluate the efficacy of Sohn's poncho technique used for placement of leukocyte PRF (L-PRF) membrane in improving the peri-implant mucosal thickness and width of keratinized mucosa as well as in the acceleration of healing process compared to the peri-implant mucosa surrounding healing abutments placed without the L-PRF membrane. METHODS: A split mouth randomized controlled clinical trial was designed in which implants were placed in the mandibular posterior region. Healing abutment is placed along with the L-PRF membrane at the test site using Sohn's poncho technique and at control site conventional healing abutment placement was done at second stage. The thickness of peri-implant mucosa as primary outcome and the Width of keratinized tissue and healing as secondary outcomes were measured and assessed at various time intervals. RESULTS: Statistically significant difference was seen in inter-group analysis when peri-implant mucosal thickness (3.8 ± 0.4 mm vs. 2.3 ± 0.4 mm) and width of keratinized mucosa (3.6 ± 0.6 mm vs. 2.7 ± 0.3 mm) in test and control groups respectively and intragroup analysis of test and control groups at 4 weeks and 6 weeks' time points. The control group showed faster healing when compared to the test group. CONCLUSION: Sohn's poncho technique in combination with L-PRF has the potential to improve the thickness of peri-implant mucosa and the width of keratinized mucosa around implants.
RESUMO
Aim: Successful functional and esthetic rehabilitation of edentulous jaws with implants depends on the optimal timing of placement, surgical protocol, materials used, cost-effectiveness, and satisfying patient needs. Increasing demand for shorter treatment times necessitates the immediate placement protocol. However, researchers have demonstrateda higher failure rate. A-PRF (Advanced platelet-rich fibrin) has exhibited accelerated bone regeneration potential. Early implant placement with a limited healing period, along with A-PRF, can be beneficial over conventional and immediate implant placement. Settings and Design: This prospective randomized clinical trial aims to assess the outcome of early implant placement in sockets preserved using A-PRF at six weeks and eight weeks of post-extraction. Two groups of 10 participantseach were formed. All patients underwent atraumatic extraction and socket preservation using A-PRF. Materials and Methods: A Partial-thickness pedicle graft was raised, and the extraction socket wasclosed. Implants wereplaced in at six and eight weeks of post-extraction in group A group B, respectively. The histomorphometric analysisassessedthe bone quality present at the timeof surgery. The insertion torque values were recorded during implant placement. Statistical Analysis Used: The obtained data were statistically analyzed using parametric tests, namely independent T-test for intergroup comparison. Results: T-test for torque values indicated a significantly higher torque value at eight weeks. The meanhistomorphometric value showeda significantly higher percentage of bone formation at eight weeks than at six weeks (P = 0.03). Conclusion: Within the study's limitations, early implant placement in extraction sockets preserved with A-PRF had significantly higher insertion torque values and predictable bone at eight weeks compared to six weeks.
