Conclusion: Root trunk concavities may cause furcation involvement and reduce the efficacy of periodontal therapy.
结论：根柱凹陷可能是造成根分叉病变的原因，并可能是导致牙周治疗效果欠佳的原因。
Conclusion: Root trunk concavities may cause furcation involvement and reduce the efficacy of periodontal therapy.
结论：根柱凹陷可能是造成根分叉病变的原因，并可能是导致牙周治疗效果欠佳的原因。
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