Rinn xcp

Radiovisiographs (RVG) were taken with the help of Rinn XCP (Dentsply Sirona, Charlotte, North Carolina, USA) system by the standardized paralleling technique using a standard intraoral grid. The area of the defect was calculated manually. The radiographic parameters were recorded as baseline and 6 months postoperatively.
Anatomic parameters, as identified by Eickholz et al. [25 (link)], were considered for radiographic analysis (Figure 1):
The base of the defect (BD) - the distances from the cement-enamel junction (CEJ) to the most in-depth extension of the bony defect.
Alveolar crest (AC) - the distance from the cement-enamel junction (CEJ) to the alveolar crest.
AUX I - An auxiliary line is drawn in the direction of tooth axis.
AUX II - 2^nd auxiliary line perpendicular to the tooth axis was drawn through the most coronal extension of the lateral wall of the intrabony defect.
INFRA 1- Distance from CEJ to BD – Distance from CEJ to AC (Difference of distances from CEJ to BD and CEJ to AC)
INFRA 2 – distance from the point where AUX II crossed the contour of the root to BD.
BDW = distance measured from lateral margin of intrabony defect to the point where AUX II cross the root surface.
Linear Bone Growth = CEJ to BD at baseline - CEJ to BD after 6 months
Area of defect = ½ (INFRA 1 * BDW)
Bone fill % = (Linear bone growth/Defect depth) *100 (Figure 2)

All measurements were made through radiographic evaluation at various follow-up time intervals (3, 6, 9, and 12 months). A digital radiographic sensor (Sopix, Action India) was used, where the exposure parameters were kept standardized at 60 KVp, 10 MA, and 0.05 seconds. The radiographic technique used for IOPA was a parallel-cone technique with the help of a sensor-positioning device (Rinn XCP, Dentsply) [16 (link)]. All images were calibrated before measuring on the computer using dental imaging software (6.14.7.3, Carestream Health, Inc., 2014). Metric analysis was performed on a millimeter scale using the measuring tool available in the software. The radiographic evaluation of patients in GP E and GP S was conducted at 5 different intervals of time: after placement (baseline) (Figures 3A, 4A), 3^rd month (Figures 3B, 4B), 6^th month (Figures 3C, 4C), 9^th month (Figures 3D, 4D), and 12^th month (Figures 3E, 4E). Following the exposure, images were captured using the software and stored. The 2 reference points (A and B) for the measurement were selected as the most coronal portion of the implant abutment of the measurable marginal bone level of the mesial and distal ends [17 (link)]. The determined values of each fixture were collected and compared over the follow-up period of 1 year separately for the mesial and the distal aspects.