CAMLOG implant position planning

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CAMLOG

Implant Position Planning

INTRODUCTION

It is known from general physiology that both non-loading and underload-

ing of the bone induce degradation just as much as overloading (inactivity

atrophy, pressure atrophy). The area between these two extremes is called

normal loading. This consists in a balance between growth and degrada-

tion. Working with bridge restorations in conventional prosthetics has led

to identification of consistently high rates of bone degradation in non-

loaded or underloaded teeth pillar (Misch/Frost 1990).

W. Schulte recognized this in 1982 and proposed early (= immediate, if pos-

sible) implantation to offset atrophy of the periodontal structures, which

commences immediately after tooth loss. The implant supports the alveo-

lar bone and prevents the bony areas from being either overloaded or sub-

jected to inactivity atrophy (stress-shielding).

LEVERAGE RELATIONS AT THE IMPLANT

Loading of the implant-bone interface is a result of the leverage relation

generated by osseointegration-related resistance to the prosthesis load arm

(equivalent to the supracrestal implant length plus the height of the crown

above the implant shoulder). If IL is smaller than CL, then the load must be

reduced (e.g., through prosthetic splinting).

TREATMENT CONCEPTS

REFERENCES

Frost HM.

Bone „mass“ and the „mechanostat“:

a proposal. Anat Rec

1987; 219:1–9

Misch CE.

Contemporary implant dentistry.

St Louis: Mosby Inc 1999

Ch22:317–318

Schulte W.

Das Tübinger Implantat.

Schweiz Mschr Zahnmed

1985; 95:872–874