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Summary Arrangement of Posterior Teeth

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it basically talks about how the correct placement of posterior teeth is important for the mastication ability, retention, and stability of both dentures. Prior to arrangement of the posterior teeth, we must understand some of the following definitions, which is related to posterior teeth arrangement

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Lecture 15 PROSTHODONTICS Dr. Firas Abdulameer
Farhan

Arrangement of Posterior Teeth
Correct placement of posterior teeth is important for the mastication ability, retention and
stability of both dentures. Prior to arrangement of the posterior teeth, we must understand some
of the following definitions, which is related to posterior teeth arrangement

‫ يجب‬، ‫ قبل ترتيب األسنان الخلفية‬.‫أمرا مه ًما لقدرة المضغ واالحتفاظ والثبات لكال أطقم األسنان‬
ً ‫يعد الوضع الصحيح لألسنان الخلفية‬
‫ والتي تتعلق بترتيب األسنان الخلفية‬، ‫أن نفهم بعض التعريفات التالية‬



❖ Curve of Spee:
It is imaginary line represent the anterio-posterior curvature of the occlusal surfaces of teeth
beginning at the tip of mandibular canine and following the buccal cusps of premolars and
molars continuing to the anterior border of the ramus of the mandible. The correct orientation
of occlusal plane will optimize esthetic, function and occlusal balance.
‫إنه خط وهمي يمثل االنحناء األمامي الخلفي لألسطح اإلطباقية لألسنان بد ًءا من طرف الناب الفك السفلي ويتبع نتوءات الشدق‬
‫ سيؤدي االتجاه الصحيح للطائرة اإلطباقية إلى تحسين‬.‫للضواحك واألضراس التي تستمر حتى الحد األمامي من فرع الفك السفلي‬
.‫التوازن الجمالي والوظيفي واإلطباق‬




❖ Christensen’s phenomenon:
A space created at posterior area produced in the natural dentition or between the opposing
posterior parts of occlusal rims when protruded the mandible (Posterior open bite). In order to
compensate this posterior open bite during forward or protrusive movement of mandibular the
compensatory curve should be made.

‫مساحة تم إنشاؤها في المنطقة الخلفية الناتجة في األسنان الطبيعية أو بين األجزاء الخلفية المتقابلة من حواف اإلطباق عند بروز‬
‫ من أجل تعويض هذه العضة المفتوحة الخلفية أثناء الحركة األمامية أو البارزة للفك السفلي‬.)‫الفك السفلي (العضة المفتوحة الخلفية‬
.‫ يجب عمل المنحنى التعويضي‬،

, Lecture 15 PROSTHODONTICS Dr. Firas Abdulameer
Farhan




❖ Compensating curve:
The anterio-posterior and mediolateral curvature which produce during lateral movement
of mandibular jaw in the alignment of the occluding surfaces and incisal edges of artificial
teeth. This curve is used to develop balanced occlusion.
‫االنحناء األمامي والخلفي والمتوسط الجانبي الذي ينتج أثناء الحركة الجانبية للفك السفلي في محاذاة األسطح المبطنة والحواف‬
.‫ يستخدم هذا المنحنى لتطوير انسداد متوازن‬.‫القاطعة لألسنان االصطناعية‬
Determined by inclination of posterior teeth and their vertical relationship to occlusal plane
and there are two curve:
1- Anteroposterior compensating curve
2- Mediolateral compensating curve

:‫يتحدد بميل األسنان الخلفية وعالقتها الرأسية بمستوى اإلطباق ويوجد منحنان‬ ❖
‫ منحنى تعويض أمامي خلفي‬-1 ❖
‫ منحنى التعويض النسيجي الوحشي‬- 2 ❖
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