Thesis (Ph.D)-Cairo University, 2022.

Bibliography: pages130-140.

Aim: This clinical trial assessed the bioclear matrix and injection molding technique against
conventional celluloid matrix technique in management of black triangle. Methodology: A
total of 26 participants were randomly divided into two groups (13 participants each)
according to the technique used. In group (A) celluloid conventional matrix method was
used, while in group (B) bioclear matrix with injection molding technique was used. The
different outcomes (Esthetic evaluation, marginal integrity and patient satisfaction) were
evaluated following the FDI criteria by two blinded examiners. The evaluation was done at
baseline (T0) (immediate after restoration); (T6) after 6 months; (T12) after 12 months.
Statistical analysis was done as categorical and ordinal data were presented as frequency and
percentage values. Categorical data were compared using fisher’s exact test. Intergroup
comparisons for ordinal data were analyzed utilizing the Mann-Whitney U test, while
intragroup comparisons were analyzed using Friedman’s test followed by the Nemenyi post
hoc test. The significance level was set at p≤0.05 within all tests, statistical analysis was
performed with R statistical analysis software version 4.1.2 for Windows1. Results:
Regarding proximal anatomical form and esthetic anatomical form, as well as phonetics and
food impaction, all cases in both groups were successful with no statistical significant
difference between groups at p value (p=0.166), (p=0.208).),(p=1),(p=1) respectively. For
the periodontal response, no significant difference between groups (p=1). However, there
was a significant difference between scores measured at different intervals, with T0 being
significantly different from other intervals (p<0.001). Marginal staining revealed that there
was no significant difference between groups (p=1). While, a significant difference between
scores measured at different intervals. Radiographic marginal integrity showed that at all
intervals, there was a significant difference between both groups, however no significant
difference was detected at different intervals (p>0.05). For marginal adaptation, there was a
significant difference between both groups (p<0.05) with no significant difference between
scores measured at different intervals (p>0.05). Conclusions: the restorative management of
the black triangle with both protocols was able to deliver superior aesthetic and good
marginal adaptation; suitable biological properties; with adequate survival time

أجريت هذه الدراسه لتقييم عملية ترميم المثلث الاسود باستخدام مصفوفة بوكلير بتقنية الحقن المقولب مقارنة بطريقة مصفوفة السليويدية التقليدية حيث تم تقسيم المشاركيين عشوائيا الي مجموعتين متساويتين كل مجموعه مكونه من 13 مشارك ثم بعد ذلك تم تقييم اجراء للحالات بعد الترميم مباشرة بعد 6 اشهر و 12 شهراشتمل التقييم على كلا من الشكل التشريحي الجمالي للسنه المرممه الشكل الجانبي للسنه المرممه وتصبغات حواف الحشوة الاستجابه البيولوجيه للثه المحيطه كفاءة حواف الحشوات اكلينيكا وفي الاشعه

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