Recording the retruded contact position: a review of clinical techniques

Abstract

The retruded contact position (RCP) is an important maxillomandibular relation in restorative dentistry. This review will describe RCP and consider its importance and use in the restorative dental treatment of the dentate and edentulous subject. A comparative account of the various mandibular guidance methods used to obtain a RCP record will be presented, followed by recommendations for fixed and removable clinical prosthodontic practice.

Reproducibility of Centric Relation Techniques by means of Condyle Position Analysis

“…Prije postupka registracije CR-a ispitanik se deprogramirao grizući vaterolicu između prednjih zuba oko pet minuta. Deprogramiranjem se postiže stabilizacija donje čeljusti tijekom registracije CR-a i poništava proprioceptivni učinak iz zuba i žvačnih mišića (10,21,22).…”

“…Softer wax (Aluwax, Aluwax Dental Products, USA) was used to record impressions of mandibular teeth in three points (anterior, right and left lateral segment). Each subject was first "deprogrammed" by biting into a cotton pellet (jig) between the anterior teeth for 5 minutes in order to stabilize the mandible during CR recording and delete the proprioceptive perception received from teeth and masticatory muscles (10,21,22).…”

“…Mandibular guidance techniques are divided into active (performed by the patient) and passive (performed by the dentist) (10,11). Generally, a guidance of the mandible into the CR position should be performed in physiologically reliable and unforced manner because an extensive guidance prevents positioning of the condyles in the CR position.…”

“…Metode vođenja donje čeljusti mogu se podijeliti na one koje izvodi pacijent (aktivne) i one koje obavlja stomatolog (pasivne) (10,11). Općenito, vođenje donje čeljusti u CR-u mora se provesti fiziološki pouzdano i nenasilno, jer forsiranje donje če-ljusti ne dovodi kondile u centričan položaj.…”

Centric relation in prosthetic rehabilitation

“…Wszystkie wymienione metody mają na celu relaksację mięśni, co ułatwia pracę operatorowi podczas ustalania i rejestracji relacji centralnej w ssż. 26,27 Metody ustalania relacji centralnej Utrata zębów prowadzi do zmniejszenia kontroli ruchów żuchwy a u pacjentów bezzębnych do doprzedniego jej ustawiania. 28 Wykonanie uzupełnień protetycznych, u pacjentów bezzębnych lub u pacjentów, którzy nie posiadają stref podparcia, wymaga rejestracji powtarzalnego położenia żuchwy względem szczęki, któ-re powinno być w granicach relacji centralnej.…”